Added a copy of design management app

This copy to be removed after feature flag removal

app/assets/javascripts/design_management/index.js

+// This application is being moved, please do not touch this files
+// Please see https://gitlab.com/gitlab-org/gitlab/-/issues/14744#note_364468096 for details
+
 import $ from 'jquery';
 import Vue from 'vue';
 import createRouter from './router';

app/assets/javascripts/design_management_new/components/app.vue

+<template>
+  <router-view />
+</template>

app/assets/javascripts/design_management_new/components/delete_button.vue

+<script>
+import { GlDeprecatedButton, GlModal, GlModalDirective } from '@gitlab/ui';
+import { uniqueId } from 'lodash';
+
+export default {
+  name: 'DeleteButton',
+  components: {
+    GlDeprecatedButton,
+    GlModal,
+  },
+  directives: {
+    GlModalDirective,
+  },
+  props: {
+    isDeleting: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
+    buttonClass: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    buttonVariant: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    hasSelectedDesigns: {
+      type: Boolean,
+      required: false,
+      default: true,
+    },
+  },
+  data() {
+    return {
+      modalId: uniqueId('design-deletion-confirmation-'),
+    };
+  },
+};
+</script>
+
+<template>
+  <div>
+    <gl-modal
+      :modal-id="modalId"
+      :title="s__('DesignManagement|Delete designs confirmation')"
+      :ok-title="s__('DesignManagement|Delete')"
+      ok-variant="danger"
+      @ok="$emit('deleteSelectedDesigns')"
+    >
+      <p>{{ s__('DesignManagement|Are you sure you want to delete the selected designs?') }}</p>
+    </gl-modal>
+    <gl-deprecated-button
+      v-gl-modal-directive="modalId"
+      :variant="buttonVariant"
+      :disabled="isDeleting || !hasSelectedDesigns"
+      :class="buttonClass"
+    >
+      <slot></slot>
+    </gl-deprecated-button>
+  </div>
+</template>

app/assets/javascripts/design_management_new/components/design_destroyer.vue

+<script>
+import { ApolloMutation } from 'vue-apollo';
+import getDesignListQuery from '../graphql/queries/get_design_list.query.graphql';
+import destroyDesignMutation from '../graphql/mutations/destroy_design.mutation.graphql';
+import { updateStoreAfterDesignsDelete } from '../utils/cache_update';
+
+export default {
+  components: {
+    ApolloMutation,
+  },
+  props: {
+    filenames: {
+      type: Array,
+      required: true,
+    },
+    projectPath: {
+      type: String,
+      required: true,
+    },
+    iid: {
+      type: String,
+      required: true,
+    },
+  },
+  computed: {
+    projectQueryBody() {
+      return {
+        query: getDesignListQuery,
+        variables: { fullPath: this.projectPath, iid: this.iid, atVersion: null },
+      };
+    },
+  },
+  methods: {
+    updateStoreAfterDelete(
+      store,
+      {
+        data: { designManagementDelete },
+      },
+    ) {
+      updateStoreAfterDesignsDelete(
+        store,
+        designManagementDelete,
+        this.projectQueryBody,
+        this.filenames,
+      );
+    },
+  },
+  destroyDesignMutation,
+};
+</script>
+
+<template>
+  <apollo-mutation
+    #default="{ mutate, loading, error }"
+    :mutation="$options.destroyDesignMutation"
+    :variables="{
+      filenames,
+      projectPath,
+      iid,
+    }"
+    :update="updateStoreAfterDelete"
+    v-on="$listeners"
+  >
+    <slot v-bind="{ mutate, loading, error }"></slot>
+  </apollo-mutation>
+</template>

app/assets/javascripts/design_management_new/components/design_note_pin.vue

+<script>
+import { __, sprintf } from '~/locale';
+import Icon from '~/vue_shared/components/icon.vue';
+
+export default {
+  name: 'DesignNotePin',
+  components: {
+    Icon,
+  },
+  props: {
+    position: {
+      type: Object,
+      required: true,
+    },
+    label: {
+      type: Number,
+      required: false,
+      default: null,
+    },
+    repositioning: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
+  },
+  computed: {
+    isNewNote() {
+      return this.label === null;
+    },
+    pinStyle() {
+      return this.repositioning ? { ...this.position, cursor: 'move' } : this.position;
+    },
+    pinLabel() {
+      return this.isNewNote
+        ? __('Comment form position')
+        : sprintf(__("Comment '%{label}' position"), { label: this.label });
+    },
+  },
+};
+</script>
+
+<template>
+  <button
+    :style="pinStyle"
+    :aria-label="pinLabel"
+    :class="{
+      'btn-transparent comment-indicator': isNewNote,
+      'js-image-badge badge badge-pill': !isNewNote,
+    }"
+    class="design-pin gl-absolute gl-display-flex gl-align-items-center gl-justify-content-center"
+    type="button"
+    @mousedown="$emit('mousedown', $event)"
+    @mouseup="$emit('mouseup', $event)"
+    @click="$emit('click', $event)"
+  >
+    <icon v-if="isNewNote" name="image-comment-dark" />
+    <template v-else>
+      {{ label }}
+    </template>
+  </button>
+</template>

app/assets/javascripts/design_management_new/components/design_notes/design_discussion.vue

+<script>
+import { ApolloMutation } from 'vue-apollo';
+import { GlTooltipDirective, GlIcon, GlLoadingIcon, GlLink } from '@gitlab/ui';
+import { s__ } from '~/locale';
+import ReplyPlaceholder from '~/notes/components/discussion_reply_placeholder.vue';
+import TimeAgoTooltip from '~/vue_shared/components/time_ago_tooltip.vue';
+import allVersionsMixin from '../../mixins/all_versions';
+import createNoteMutation from '../../graphql/mutations/create_note.mutation.graphql';
+import toggleResolveDiscussionMutation from '../../graphql/mutations/toggle_resolve_discussion.mutation.graphql';
+import getDesignQuery from '../../graphql/queries/get_design.query.graphql';
+import activeDiscussionQuery from '../../graphql/queries/active_discussion.query.graphql';
+import DesignNote from './design_note.vue';
+import DesignReplyForm from './design_reply_form.vue';
+import { updateStoreAfterAddDiscussionComment } from '../../utils/cache_update';
+import { ACTIVE_DISCUSSION_SOURCE_TYPES } from '../../constants';
+import ToggleRepliesWidget from './toggle_replies_widget.vue';
+
+export default {
+  components: {
+    ApolloMutation,
+    DesignNote,
+    ReplyPlaceholder,
+    DesignReplyForm,
+    GlIcon,
+    GlLoadingIcon,
+    GlLink,
+    ToggleRepliesWidget,
+    TimeAgoTooltip,
+  },
+  directives: {
+    GlTooltip: GlTooltipDirective,
+  },
+  mixins: [allVersionsMixin],
+  props: {
+    discussion: {
+      type: Object,
+      required: true,
+    },
+    noteableId: {
+      type: String,
+      required: true,
+    },
+    designId: {
+      type: String,
+      required: true,
+    },
+    markdownPreviewPath: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    resolvedDiscussionsExpanded: {
+      type: Boolean,
+      required: true,
+    },
+    discussionWithOpenForm: {
+      type: String,
+      required: true,
+    },
+  },
+  apollo: {
+    activeDiscussion: {
+      query: activeDiscussionQuery,
+      result({ data }) {
+        const discussionId = data.activeDiscussion.id;
+        if (this.discussion.resolved && !this.resolvedDiscussionsExpanded) {
+          return;
+        }
+        // We watch any changes to the active discussion from the design pins and scroll to this discussion if it exists
+        // We don't want scrollIntoView to be triggered from the discussion click itself
+        if (
+          discussionId &&
+          data.activeDiscussion.source === ACTIVE_DISCUSSION_SOURCE_TYPES.pin &&
+          discussionId === this.discussion.notes[0].id
+        ) {
+          this.$el.scrollIntoView({
+            behavior: 'smooth',
+            inline: 'start',
+          });
+        }
+      },
+    },
+  },
+  data() {
+    return {
+      discussionComment: '',
+      isFormRendered: false,
+      activeDiscussion: {},
+      isResolving: false,
+      shouldChangeResolvedStatus: false,
+      areRepliesCollapsed: this.discussion.resolved,
+    };
+  },
+  computed: {
+    mutationPayload() {
+      return {
+        noteableId: this.noteableId,
+        body: this.discussionComment,
+        discussionId: this.discussion.id,
+      };
+    },
+    designVariables() {
+      return {
+        fullPath: this.projectPath,
+        iid: this.issueIid,
+        filenames: [this.$route.params.id],
+        atVersion: this.designsVersion,
+      };
+    },
+    isDiscussionHighlighted() {
+      return this.discussion.notes[0].id === this.activeDiscussion.id;
+    },
+    resolveCheckboxText() {
+      return this.discussion.resolved
+        ? s__('DesignManagement|Unresolve thread')
+        : s__('DesignManagement|Resolve thread');
+    },
+    firstNote() {
+      return this.discussion.notes[0];
+    },
+    discussionReplies() {
+      return this.discussion.notes.slice(1);
+    },
+    areRepliesShown() {
+      return !this.discussion.resolved || !this.areRepliesCollapsed;
+    },
+    resolveIconName() {
+      return this.discussion.resolved ? 'check-circle-filled' : 'check-circle';
+    },
+    isRepliesWidgetVisible() {
+      return this.discussion.resolved && this.discussionReplies.length > 0;
+    },
+    isReplyPlaceholderVisible() {
+      return this.areRepliesShown || !this.discussionReplies.length;
+    },
+    isFormVisible() {
+      return this.isFormRendered && this.discussionWithOpenForm === this.discussion.id;
+    },
+  },
+  methods: {
+    addDiscussionComment(
+      store,
+      {
+        data: { createNote },
+      },
+    ) {
+      updateStoreAfterAddDiscussionComment(
+        store,
+        createNote,
+        getDesignQuery,
+        this.designVariables,
+        this.discussion.id,
+      );
+    },
+    onDone() {
+      this.discussionComment = '';
+      this.hideForm();
+      if (this.shouldChangeResolvedStatus) {
+        this.toggleResolvedStatus();
+      }
+    },
+    onCreateNoteError(err) {
+      this.$emit('createNoteError', err);
+    },
+    hideForm() {
+      this.isFormRendered = false;
+      this.discussionComment = '';
+    },
+    showForm() {
+      this.$emit('openForm', this.discussion.id);
+      this.isFormRendered = true;
+    },
+    toggleResolvedStatus() {
+      this.isResolving = true;
+      this.$apollo
+        .mutate({
+          mutation: toggleResolveDiscussionMutation,
+          variables: { id: this.discussion.id, resolve: !this.discussion.resolved },
+        })
+        .then(({ data }) => {
+          if (data.errors?.length > 0) {
+            this.$emit('resolveDiscussionError', data.errors[0]);
+          }
+        })
+        .catch(err => {
+          this.$emit('resolveDiscussionError', err);
+        })
+        .finally(() => {
+          this.isResolving = false;
+        });
+    },
+  },
+  createNoteMutation,
+};
+</script>
+
+<template>
+  <div class="design-discussion-wrapper">
+    <div
+      class="badge badge-pill gl-display-flex gl-align-items-center gl-justify-content-center"
+      :class="{ resolved: discussion.resolved }"
+      type="button"
+    >
+      {{ discussion.index }}
+    </div>
+    <ul
+      class="design-discussion bordered-box gl-relative gl-p-0 gl-list-style-none"
+      data-qa-selector="design_discussion_content"
+    >
+      <design-note
+        :note="firstNote"
+        :markdown-preview-path="markdownPreviewPath"
+        :is-resolving="isResolving"
+        :class="{ 'gl-bg-blue-50': isDiscussionHighlighted }"
+        @error="$emit('updateNoteError', $event)"
+      >
+        <template v-if="discussion.resolvable" #resolveDiscussion>
+          <button
+            v-gl-tooltip
+            :class="{ 'is-active': discussion.resolved }"
+            :title="resolveCheckboxText"
+            :aria-label="resolveCheckboxText"
+            type="button"
+            class="line-resolve-btn note-action-button gl-mr-3"
+            data-testid="resolve-button"
+            @click.stop="toggleResolvedStatus"
+          >
+            <gl-icon v-if="!isResolving" :name="resolveIconName" data-testid="resolve-icon" />
+            <gl-loading-icon v-else inline />
+          </button>
+        </template>
+        <template v-if="discussion.resolved" #resolvedStatus>
+          <p class="gl-text-gray-700 gl-font-sm gl-m-0 gl-mt-5" data-testid="resolved-message">
+            {{ __('Resolved by') }}
+            <gl-link
+              class="gl-text-gray-700 gl-text-decoration-none gl-font-sm link-inherit-color"
+              :href="discussion.resolvedBy.webUrl"
+              target="_blank"
+              >{{ discussion.resolvedBy.name }}</gl-link
+            >
+            <time-ago-tooltip :time="discussion.resolvedAt" tooltip-placement="bottom" />
+          </p>
+        </template>
+      </design-note>
+      <toggle-replies-widget
+        v-if="isRepliesWidgetVisible"
+        :collapsed="areRepliesCollapsed"
+        :replies="discussionReplies"
+        @toggle="areRepliesCollapsed = !areRepliesCollapsed"
+      />
+      <design-note
+        v-for="note in discussionReplies"
+        v-show="areRepliesShown"
+        :key="note.id"
+        :note="note"
+        :markdown-preview-path="markdownPreviewPath"
+        :is-resolving="isResolving"
+        :class="{ 'gl-bg-blue-50': isDiscussionHighlighted }"
+        @error="$emit('updateNoteError', $event)"
+      />
+      <li v-show="isReplyPlaceholderVisible" class="reply-wrapper">
+        <reply-placeholder
+          v-if="!isFormVisible"
+          class="qa-discussion-reply"
+          :button-text="__('Reply...')"
+          @onClick="showForm"
+        />
+        <apollo-mutation
+          v-else
+          #default="{ mutate, loading }"
+          :mutation="$options.createNoteMutation"
+          :variables="{
+            input: mutationPayload,
+          }"
+          :update="addDiscussionComment"
+          @done="onDone"
+          @error="onCreateNoteError"
+        >
+          <design-reply-form
+            v-model="discussionComment"
+            :is-saving="loading"
+            :markdown-preview-path="markdownPreviewPath"
+            @submitForm="mutate"
+            @cancelForm="hideForm"
+          >
+            <template v-if="discussion.resolvable" #resolveCheckbox>
+              <label data-testid="resolve-checkbox">
+                <input v-model="shouldChangeResolvedStatus" type="checkbox" />
+                {{ resolveCheckboxText }}
+              </label>
+            </template>
+          </design-reply-form>
+        </apollo-mutation>
+      </li>
+    </ul>
+  </div>
+</template>

app/assets/javascripts/design_management_new/components/design_notes/design_note.vue

+<script>
+import { ApolloMutation } from 'vue-apollo';
+import { GlTooltipDirective, GlIcon } from '@gitlab/ui';
+import updateNoteMutation from '../../graphql/mutations/update_note.mutation.graphql';
+import UserAvatarLink from '~/vue_shared/components/user_avatar/user_avatar_link.vue';
+import TimelineEntryItem from '~/vue_shared/components/notes/timeline_entry_item.vue';
+import TimeAgoTooltip from '~/vue_shared/components/time_ago_tooltip.vue';
+import DesignReplyForm from './design_reply_form.vue';
+import { findNoteId } from '../../utils/design_management_utils';
+import { hasErrors } from '../../utils/cache_update';
+
+export default {
+  components: {
+    UserAvatarLink,
+    TimelineEntryItem,
+    TimeAgoTooltip,
+    DesignReplyForm,
+    ApolloMutation,
+    GlIcon,
+  },
+  directives: {
+    GlTooltip: GlTooltipDirective,
+  },
+  props: {
+    note: {
+      type: Object,
+      required: true,
+    },
+    markdownPreviewPath: {
+      type: String,
+      required: false,
+      default: '',
+    },
+  },
+  data() {
+    return {
+      noteText: this.note.body,
+      isEditing: false,
+    };
+  },
+  computed: {
+    author() {
+      return this.note.author;
+    },
+    noteAnchorId() {
+      return findNoteId(this.note.id);
+    },
+    isNoteLinked() {
+      return this.$route.hash === `#note_${this.noteAnchorId}`;
+    },
+    mutationPayload() {
+      return {
+        id: this.note.id,
+        body: this.noteText,
+      };
+    },
+    isEditButtonVisible() {
+      return !this.isEditing && this.note.userPermissions.adminNote;
+    },
+  },
+  mounted() {
+    if (this.isNoteLinked) {
+      this.$refs.anchor.$el.scrollIntoView({ behavior: 'smooth', inline: 'start' });
+    }
+  },
+  methods: {
+    hideForm() {
+      this.isEditing = false;
+      this.noteText = this.note.body;
+    },
+    onDone({ data }) {
+      this.hideForm();
+      if (hasErrors(data.updateNote)) {
+        this.$emit('error', data.errors[0]);
+      }
+    },
+  },
+  updateNoteMutation,
+};
+</script>
+
+<template>
+  <timeline-entry-item :id="`note_${noteAnchorId}`" ref="anchor" class="design-note note-form">
+    <user-avatar-link
+      :link-href="author.webUrl"
+      :img-src="author.avatarUrl"
+      :img-alt="author.username"
+      :img-size="40"
+    />
+    <div class="d-flex justify-content-between">
+      <div>
+        <a
+          v-once
+          :href="author.webUrl"
+          class="js-user-link"
+          :data-user-id="author.id"
+          :data-username="author.username"
+        >
+          <span class="note-header-author-name bold">{{ author.name }}</span>
+          <span v-if="author.status_tooltip_html" v-html="author.status_tooltip_html"></span>
+          <span class="note-headline-light">@{{ author.username }}</span>
+        </a>
+        <span class="note-headline-light note-headline-meta">
+          <span class="system-note-message"> <slot></slot> </span>
+          <template v-if="note.createdAt">
+            <span class="system-note-separator"></span>
+            <a class="note-timestamp system-note-separator" :href="`#note_${noteAnchorId}`">
+              <time-ago-tooltip :time="note.createdAt" tooltip-placement="bottom" />
+            </a>
+          </template>
+        </span>
+      </div>
+      <div class="gl-display-flex">
+        <slot name="resolveDiscussion"></slot>
+        <button
+          v-if="isEditButtonVisible"
+          v-gl-tooltip
+          type="button"
+          :title="__('Edit comment')"
+          class="note-action-button js-note-edit btn btn-transparent qa-note-edit-button"
+          @click="isEditing = true"
+        >
+          <gl-icon name="pencil" class="link-highlight" />
+        </button>
+      </div>
+    </div>
+    <template v-if="!isEditing">
+      <div
+        class="note-text js-note-text md"
+        data-qa-selector="note_content"
+        v-html="note.bodyHtml"
+      ></div>
+      <slot name="resolvedStatus"></slot>
+    </template>
+    <apollo-mutation
+      v-else
+      #default="{ mutate, loading }"
+      :mutation="$options.updateNoteMutation"
+      :variables="{
+        input: mutationPayload,
+      }"
+      @error="$emit('error', $event)"
+      @done="onDone"
+    >
+      <design-reply-form
+        v-model="noteText"
+        :is-saving="loading"
+        :markdown-preview-path="markdownPreviewPath"
+        :is-new-comment="false"
+        class="mt-5"
+        @submitForm="mutate"
+        @cancelForm="hideForm"
+      />
+    </apollo-mutation>
+  </timeline-entry-item>
+</template>

app/assets/javascripts/design_management_new/components/design_notes/design_reply_form.vue

+<script>
+import { GlDeprecatedButton, GlModal } from '@gitlab/ui';
+import MarkdownField from '~/vue_shared/components/markdown/field.vue';
+import { s__ } from '~/locale';
+
+export default {
+  name: 'DesignReplyForm',
+  components: {
+    MarkdownField,
+    GlDeprecatedButton,
+    GlModal,
+  },
+  props: {
+    markdownPreviewPath: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    value: {
+      type: String,
+      required: true,
+    },
+    isSaving: {
+      type: Boolean,
+      required: true,
+    },
+    isNewComment: {
+      type: Boolean,
+      required: false,
+      default: true,
+    },
+  },
+  data() {
+    return {
+      formText: this.value,
+    };
+  },
+  computed: {
+    hasValue() {
+      return this.value.trim().length > 0;
+    },
+    modalSettings() {
+      if (this.isNewComment) {
+        return {
+          title: s__('DesignManagement|Cancel comment confirmation'),
+          okTitle: s__('DesignManagement|Discard comment'),
+          cancelTitle: s__('DesignManagement|Keep comment'),
+          content: s__('DesignManagement|Are you sure you want to cancel creating this comment?'),
+        };
+      }
+      return {
+        title: s__('DesignManagement|Cancel comment update confirmation'),
+        okTitle: s__('DesignManagement|Cancel changes'),
+        cancelTitle: s__('DesignManagement|Keep changes'),
+        content: s__('DesignManagement|Are you sure you want to cancel changes to this comment?'),
+      };
+    },
+    buttonText() {
+      return this.isNewComment
+        ? s__('DesignManagement|Comment')
+        : s__('DesignManagement|Save comment');
+    },
+  },
+  mounted() {
+    this.focusInput();
+  },
+  methods: {
+    submitForm() {
+      if (this.hasValue) this.$emit('submitForm');
+    },
+    cancelComment() {
+      if (this.hasValue && this.formText !== this.value) {
+        this.$refs.cancelCommentModal.show();
+      } else {
+        this.$emit('cancelForm');
+      }
+    },
+    focusInput() {
+      this.$refs.textarea.focus();
+    },
+  },
+};
+</script>
+
+<template>
+  <form class="new-note common-note-form" @submit.prevent>
+    <markdown-field
+      :markdown-preview-path="markdownPreviewPath"
+      :can-attach-file="false"
+      :enable-autocomplete="true"
+      :textarea-value="value"
+      markdown-docs-path="/help/user/markdown"
+      class="bordered-box"
+    >
+      <template #textarea>
+        <textarea
+          ref="textarea"
+          :value="value"
+          class="note-textarea js-gfm-input js-autosize markdown-area"
+          dir="auto"
+          data-supports-quick-actions="false"
+          data-qa-selector="note_textarea"
+          :aria-label="__('Description')"
+          :placeholder="__('Write a comment…')"
+          @input="$emit('input', $event.target.value)"
+          @keydown.meta.enter="submitForm"
+          @keydown.ctrl.enter="submitForm"
+          @keyup.esc.stop="cancelComment"
+        >
+        </textarea>
+      </template>
+    </markdown-field>
+    <slot name="resolveCheckbox"></slot>
+    <div class="note-form-actions gl-display-flex gl-justify-content-space-between">
+      <gl-deprecated-button
+        ref="submitButton"
+        :disabled="!hasValue || isSaving"
+        variant="success"
+        type="submit"
+        data-track-event="click_button"
+        data-qa-selector="save_comment_button"
+        @click="$emit('submitForm')"
+      >
+        {{ buttonText }}
+      </gl-deprecated-button>
+      <gl-deprecated-button ref="cancelButton" @click="cancelComment">{{
+        __('Cancel')
+      }}</gl-deprecated-button>
+    </div>
+    <gl-modal
+      ref="cancelCommentModal"
+      ok-variant="danger"
+      :title="modalSettings.title"
+      :ok-title="modalSettings.okTitle"
+      :cancel-title="modalSettings.cancelTitle"
+      modal-id="cancel-comment-modal"
+      @ok="$emit('cancelForm')"
+      >{{ modalSettings.content }}
+    </gl-modal>
+  </form>
+</template>

app/assets/javascripts/design_management_new/components/design_notes/toggle_replies_widget.vue

+<script>
+import { GlIcon, GlButton, GlLink } from '@gitlab/ui';
+import { __, n__ } from '~/locale';
+import TimeAgoTooltip from '~/vue_shared/components/time_ago_tooltip.vue';
+
+export default {
+  name: 'ToggleNotesWidget',
+  components: {
+    GlIcon,
+    GlButton,
+    GlLink,
+    TimeAgoTooltip,
+  },
+  props: {
+    collapsed: {
+      type: Boolean,
+      required: true,
+    },
+    replies: {
+      type: Array,
+      required: true,
+    },
+  },
+  computed: {
+    lastReply() {
+      return this.replies[this.replies.length - 1];
+    },
+    iconName() {
+      return this.collapsed ? 'chevron-right' : 'chevron-down';
+    },
+    toggleText() {
+      return this.collapsed
+        ? `${this.replies.length} ${n__('reply', 'replies', this.replies.length)}`
+        : __('Collapse replies');
+    },
+  },
+};
+</script>
+
+<template>
+  <li
+    class="toggle-comments gl-bg-gray-50 gl-display-flex gl-align-items-center gl-py-3"
+    :class="{ expanded: !collapsed }"
+    data-testid="toggle-comments-wrapper"
+  >
+    <gl-icon :name="iconName" class="gl-ml-3" @click.stop="$emit('toggle')" />
+    <gl-button
+      variant="link"
+      class="toggle-comments-button gl-ml-2 gl-mr-2"
+      @click.stop="$emit('toggle')"
+    >
+      {{ toggleText }}
+    </gl-button>
+    <template v-if="collapsed">
+      <span class="gl-text-gray-700">{{ __('Last reply by') }}</span>
+      <gl-link
+        :href="lastReply.author.webUrl"
+        target="_blank"
+        class="link-inherit-color gl-text-black-normal gl-text-decoration-none gl-font-weight-bold gl-ml-2 gl-mr-2"
+      >
+        {{ lastReply.author.name }}
+      </gl-link>
+      <time-ago-tooltip
+        :time="lastReply.createdAt"
+        tooltip-placement="bottom"
+        class="gl-text-gray-700"
+      />
+    </template>
+  </li>
+</template>

app/assets/javascripts/design_management_new/components/design_overlay.vue

+<script>
+import activeDiscussionQuery from '../graphql/queries/active_discussion.query.graphql';
+import updateActiveDiscussionMutation from '../graphql/mutations/update_active_discussion.mutation.graphql';
+import DesignNotePin from './design_note_pin.vue';
+import { ACTIVE_DISCUSSION_SOURCE_TYPES } from '../constants';
+
+export default {
+  name: 'DesignOverlay',
+  components: {
+    DesignNotePin,
+  },
+  props: {
+    dimensions: {
+      type: Object,
+      required: true,
+    },
+    position: {
+      type: Object,
+      required: true,
+    },
+    notes: {
+      type: Array,
+      required: false,
+      default: () => [],
+    },
+    currentCommentForm: {
+      type: Object,
+      required: false,
+      default: null,
+    },
+    disableCommenting: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
+    resolvedDiscussionsExpanded: {
+      type: Boolean,
+      required: true,
+    },
+  },
+  apollo: {
+    activeDiscussion: {
+      query: activeDiscussionQuery,
+    },
+  },
+  data() {
+    return {
+      movingNoteNewPosition: null,
+      movingNoteStartPosition: null,
+      activeDiscussion: {},
+    };
+  },
+  computed: {
+    overlayStyle() {
+      const cursor = this.disableCommenting ? 'unset' : undefined;
+
+      return {
+        cursor,
+        width: `${this.dimensions.width}px`,
+        height: `${this.dimensions.height}px`,
+        ...this.position,
+      };
+    },
+    isMovingCurrentComment() {
+      return Boolean(this.movingNoteStartPosition && !this.movingNoteStartPosition.noteId);
+    },
+    currentCommentPositionStyle() {
+      return this.isMovingCurrentComment && this.movingNoteNewPosition
+        ? this.getNotePositionStyle(this.movingNoteNewPosition)
+        : this.getNotePositionStyle(this.currentCommentForm);
+    },
+  },
+  methods: {
+    setNewNoteCoordinates({ x, y }) {
+      this.$emit('openCommentForm', { x, y });
+    },
+    getNoteRelativePosition(position) {
+      const { x, y, width, height } = position;
+      const widthRatio = this.dimensions.width / width;
+      const heightRatio = this.dimensions.height / height;
+      return {
+        left: Math.round(x * widthRatio),
+        top: Math.round(y * heightRatio),
+      };
+    },
+    getNotePositionStyle(position) {
+      const { left, top } = this.getNoteRelativePosition(position);
+      return {
+        left: `${left}px`,
+        top: `${top}px`,
+      };
+    },
+    getMovingNotePositionDelta(e) {
+      let deltaX = 0;
+      let deltaY = 0;
+
+      if (this.movingNoteStartPosition) {
+        const { clientX, clientY } = this.movingNoteStartPosition;
+        deltaX = e.clientX - clientX;
+        deltaY = e.clientY - clientY;
+      }
+
+      return {
+        deltaX,
+        deltaY,
+      };
+    },
+    isMovingNote(noteId) {
+      const movingNoteId = this.movingNoteStartPosition?.noteId;
+      return Boolean(movingNoteId && movingNoteId === noteId);
+    },
+    canMoveNote(note) {
+      const { userPermissions } = note;
+      const { adminNote } = userPermissions || {};
+
+      return Boolean(adminNote);
+    },
+    isPositionInOverlay(position) {
+      const { top, left } = this.getNoteRelativePosition(position);
+      const { height, width } = this.dimensions;
+
+      return top >= 0 && top <= height && left >= 0 && left <= width;
+    },
+    onNewNoteMove(e) {
+      if (!this.isMovingCurrentComment) return;
+
+      const { deltaX, deltaY } = this.getMovingNotePositionDelta(e);
+      const x = this.currentCommentForm.x + deltaX;
+      const y = this.currentCommentForm.y + deltaY;
+
+      const movingNoteNewPosition = {
+        x,
+        y,
+        width: this.dimensions.width,
+        height: this.dimensions.height,
+      };
+
+      if (!this.isPositionInOverlay(movingNoteNewPosition)) {
+        this.onNewNoteMouseup();
+        return;
+      }
+
+      this.movingNoteNewPosition = movingNoteNewPosition;
+    },
+    onExistingNoteMove(e) {
+      const note = this.notes.find(({ id }) => id === this.movingNoteStartPosition.noteId);
+      if (!note || !this.canMoveNote(note)) return;
+
+      const { position } = note;
+      const { width, height } = position;
+      const widthRatio = this.dimensions.width / width;
+      const heightRatio = this.dimensions.height / height;
+
+      const { deltaX, deltaY } = this.getMovingNotePositionDelta(e);
+      const x = position.x * widthRatio + deltaX;
+      const y = position.y * heightRatio + deltaY;
+
+      const movingNoteNewPosition = {
+        x,
+        y,
+        width: this.dimensions.width,
+        height: this.dimensions.height,
+      };
+
+      if (!this.isPositionInOverlay(movingNoteNewPosition)) {
+        this.onExistingNoteMouseup();
+        return;
+      }
+
+      this.movingNoteNewPosition = movingNoteNewPosition;
+    },
+    onNewNoteMouseup() {
+      if (!this.movingNoteNewPosition) return;
+
+      const { x, y } = this.movingNoteNewPosition;
+      this.setNewNoteCoordinates({ x, y });
+    },
+    onExistingNoteMouseup(note) {
+      if (!this.movingNoteStartPosition || !this.movingNoteNewPosition) {
+        this.updateActiveDiscussion(note.id);
+        this.$emit('closeCommentForm');
+        return;
+      }
+
+      const { x, y } = this.movingNoteNewPosition;
+      this.$emit('moveNote', {
+        noteId: this.movingNoteStartPosition.noteId,
+        discussionId: this.movingNoteStartPosition.discussionId,
+        coordinates: { x, y },
+      });
+    },
+    onNoteMousedown({ clientX, clientY }, note) {
+      this.movingNoteStartPosition = {
+        noteId: note?.id,
+        discussionId: note?.discussion.id,
+        clientX,
+        clientY,
+      };
+    },
+    onOverlayMousemove(e) {
+      if (!this.movingNoteStartPosition) return;
+
+      if (this.isMovingCurrentComment) {
+        this.onNewNoteMove(e);
+      } else {
+        this.onExistingNoteMove(e);
+      }
+    },
+    onNoteMouseup(note) {
+      if (!this.movingNoteStartPosition) return;
+
+      if (this.isMovingCurrentComment) {
+        this.onNewNoteMouseup();
+      } else {
+        this.onExistingNoteMouseup(note);
+      }
+
+      this.movingNoteStartPosition = null;
+      this.movingNoteNewPosition = null;
+    },
+    onAddCommentMouseup({ offsetX, offsetY }) {
+      if (this.disableCommenting) return;
+      if (this.activeDiscussion.id) {
+        this.updateActiveDiscussion();
+      }
+
+      this.setNewNoteCoordinates({ x: offsetX, y: offsetY });
+    },
+    updateActiveDiscussion(id) {
+      this.$apollo.mutate({
+        mutation: updateActiveDiscussionMutation,
+        variables: {
+          id,
+          source: ACTIVE_DISCUSSION_SOURCE_TYPES.pin,
+        },
+      });
+    },
+    isNoteInactive(note) {
+      return this.activeDiscussion.id && this.activeDiscussion.id !== note.id;
+    },
+    designPinClass(note) {
+      return { inactive: this.isNoteInactive(note), resolved: note.resolved };
+    },
+  },
+};
+</script>
+
+<template>
+  <div
+    class="position-absolute image-diff-overlay frame"
+    :style="overlayStyle"
+    @mousemove="onOverlayMousemove"
+    @mouseleave="onNoteMouseup"
+  >
+    <button
+      v-show="!disableCommenting"
+      type="button"
+      class="btn-transparent position-absolute image-diff-overlay-add-comment w-100 h-100 js-add-image-diff-note-button"
+      data-qa-selector="design_image_button"
+      @mouseup="onAddCommentMouseup"
+    ></button>
+    <template v-for="note in notes">
+      <design-note-pin
+        v-if="resolvedDiscussionsExpanded || !note.resolved"
+        :key="note.id"
+        :label="note.index"
+        :repositioning="isMovingNote(note.id)"
+        :position="
+          isMovingNote(note.id) && movingNoteNewPosition
+            ? getNotePositionStyle(movingNoteNewPosition)
+            : getNotePositionStyle(note.position)
+        "
+        :class="designPinClass(note)"
+        @mousedown.stop="onNoteMousedown($event, note)"
+        @mouseup.stop="onNoteMouseup(note)"
+      />
+    </template>
+
+    <design-note-pin
+      v-if="currentCommentForm"
+      :position="currentCommentPositionStyle"
+      :repositioning="isMovingCurrentComment"
+      @mousedown.stop="onNoteMousedown"
+      @mouseup.stop="onNoteMouseup"
+    />
+  </div>
+</template>

app/assets/javascripts/design_management_new/components/design_scaler.vue

+<script>
+import { GlIcon } from '@gitlab/ui';
+
+const SCALE_STEP_SIZE = 0.2;
+const DEFAULT_SCALE = 1;
+const MIN_SCALE = 1;
+const MAX_SCALE = 2;
+
+export default {
+  components: {
+    GlIcon,
+  },
+  data() {
+    return {
+      scale: DEFAULT_SCALE,
+    };
+  },
+  computed: {
+    disableReset() {
+      return this.scale <= MIN_SCALE;
+    },
+    disableDecrease() {
+      return this.scale === DEFAULT_SCALE;
+    },
+    disableIncrease() {
+      return this.scale >= MAX_SCALE;
+    },
+  },
+  methods: {
+    setScale(scale) {
+      if (scale < MIN_SCALE) {
+        return;
+      }
+
+      this.scale = Math.round(scale * 100) / 100;
+      this.$emit('scale', this.scale);
+    },
+    incrementScale() {
+      this.setScale(this.scale + SCALE_STEP_SIZE);
+    },
+    decrementScale() {
+      this.setScale(this.scale - SCALE_STEP_SIZE);
+    },
+    resetScale() {
+      this.setScale(DEFAULT_SCALE);
+    },
+  },
+};
+</script>
+
+<template>
+  <div class="design-scaler btn-group" role="group">
+    <button class="btn" :disabled="disableDecrease" @click="decrementScale">
+      <span class="d-flex-center gl-icon s16">
+        –
+      </span>
+    </button>
+    <button class="btn" :disabled="disableReset" @click="resetScale">
+      <gl-icon name="redo" />
+    </button>
+    <button class="btn" :disabled="disableIncrease" @click="incrementScale">
+      <gl-icon name="plus" />
+    </button>
+  </div>
+</template>

app/assets/javascripts/design_management_new/components/design_sidebar.vue

+<script>
+import { s__ } from '~/locale';
+import Cookies from 'js-cookie';
+import { parseBoolean } from '~/lib/utils/common_utils';
+import { GlCollapse, GlButton, GlPopover } from '@gitlab/ui';
+import updateActiveDiscussionMutation from '../graphql/mutations/update_active_discussion.mutation.graphql';
+import { extractDiscussions, extractParticipants } from '../utils/design_management_utils';
+import { ACTIVE_DISCUSSION_SOURCE_TYPES } from '../constants';
+import DesignDiscussion from './design_notes/design_discussion.vue';
+import Participants from '~/sidebar/components/participants/participants.vue';
+
+export default {
+  components: {
+    DesignDiscussion,
+    Participants,
+    GlCollapse,
+    GlButton,
+    GlPopover,
+  },
+  props: {
+    design: {
+      type: Object,
+      required: true,
+    },
+    resolvedDiscussionsExpanded: {
+      type: Boolean,
+      required: true,
+    },
+    markdownPreviewPath: {
+      type: String,
+      required: true,
+    },
+  },
+  data() {
+    return {
+      isResolvedCommentsPopoverHidden: parseBoolean(Cookies.get(this.$options.cookieKey)),
+      discussionWithOpenForm: '',
+    };
+  },
+  computed: {
+    discussions() {
+      return extractDiscussions(this.design.discussions);
+    },
+    issue() {
+      return {
+        ...this.design.issue,
+        webPath: this.design.issue.webPath.substr(1),
+      };
+    },
+    discussionParticipants() {
+      return extractParticipants(this.issue.participants);
+    },
+    resolvedDiscussions() {
+      return this.discussions.filter(discussion => discussion.resolved);
+    },
+    unresolvedDiscussions() {
+      return this.discussions.filter(discussion => !discussion.resolved);
+    },
+    resolvedCommentsToggleIcon() {
+      return this.resolvedDiscussionsExpanded ? 'chevron-down' : 'chevron-right';
+    },
+  },
+  methods: {
+    handleSidebarClick() {
+      this.isResolvedCommentsPopoverHidden = true;
+      Cookies.set(this.$options.cookieKey, 'true', { expires: 365 * 10 });
+      this.updateActiveDiscussion();
+    },
+    updateActiveDiscussion(id) {
+      this.$apollo.mutate({
+        mutation: updateActiveDiscussionMutation,
+        variables: {
+          id,
+          source: ACTIVE_DISCUSSION_SOURCE_TYPES.discussion,
+        },
+      });
+    },
+    closeCommentForm() {
+      this.comment = '';
+      this.$emit('closeCommentForm');
+    },
+    updateDiscussionWithOpenForm(id) {
+      this.discussionWithOpenForm = id;
+    },
+  },
+  resolveCommentsToggleText: s__('DesignManagement|Resolved Comments'),
+  cookieKey: 'hide_design_resolved_comments_popover',
+};
+</script>
+
+<template>
+  <div class="image-notes" @click="handleSidebarClick">
+    <h2 class="gl-font-weight-bold gl-mt-0">
+      {{ issue.title }}
+    </h2>
+    <a
+      class="gl-text-gray-600 gl-text-decoration-none gl-mb-6 gl-display-block"
+      :href="issue.webUrl"
+      >{{ issue.webPath }}</a
+    >
+    <participants
+      :participants="discussionParticipants"
+      :show-participant-label="false"
+      class="gl-mb-4"
+    />
+    <h2
+      v-if="unresolvedDiscussions.length === 0"
+      class="new-discussion-disclaimer gl-font-base gl-m-0 gl-mb-4"
+      data-testid="new-discussion-disclaimer"
+    >
+      {{ s__("DesignManagement|Click the image where you'd like to start a new discussion") }}
+    </h2>
+    <design-discussion
+      v-for="discussion in unresolvedDiscussions"
+      :key="discussion.id"
+      :discussion="discussion"
+      :design-id="$route.params.id"
+      :noteable-id="design.id"
+      :markdown-preview-path="markdownPreviewPath"
+      :resolved-discussions-expanded="resolvedDiscussionsExpanded"
+      :discussion-with-open-form="discussionWithOpenForm"
+      data-testid="unresolved-discussion"
+      @createNoteError="$emit('onDesignDiscussionError', $event)"
+      @updateNoteError="$emit('updateNoteError', $event)"
+      @resolveDiscussionError="$emit('resolveDiscussionError', $event)"
+      @click.native.stop="updateActiveDiscussion(discussion.notes[0].id)"
+      @openForm="updateDiscussionWithOpenForm"
+    />
+    <template v-if="resolvedDiscussions.length > 0">
+      <gl-button
+        id="resolved-comments"
+        data-testid="resolved-comments"
+        :icon="resolvedCommentsToggleIcon"
+        variant="link"
+        class="link-inherit-color gl-text-black-normal gl-text-decoration-none gl-font-weight-bold gl-mb-4"
+        @click="$emit('toggleResolvedComments')"
+        >{{ $options.resolveCommentsToggleText }} ({{ resolvedDiscussions.length }})
+      </gl-button>
+      <gl-popover
+        v-if="!isResolvedCommentsPopoverHidden"
+        :show="!isResolvedCommentsPopoverHidden"
+        target="resolved-comments"
+        container="popovercontainer"
+        placement="top"
+        :title="s__('DesignManagement|Resolved Comments')"
+      >
+        <p>
+          {{
+            s__(
+              'DesignManagement|Comments you resolve can be viewed and unresolved by going to the "Resolved Comments" section below',
+            )
+          }}
+        </p>
+        <a href="#" rel="noopener noreferrer" target="_blank">{{
+          s__('DesignManagement|Learn more about resolving comments')
+        }}</a>
+      </gl-popover>
+      <gl-collapse :visible="resolvedDiscussionsExpanded" class="gl-mt-3">
+        <design-discussion
+          v-for="discussion in resolvedDiscussions"
+          :key="discussion.id"
+          :discussion="discussion"
+          :design-id="$route.params.id"
+          :noteable-id="design.id"
+          :markdown-preview-path="markdownPreviewPath"
+          :resolved-discussions-expanded="resolvedDiscussionsExpanded"
+          :discussion-with-open-form="discussionWithOpenForm"
+          data-testid="resolved-discussion"
+          @error="$emit('onDesignDiscussionError', $event)"
+          @updateNoteError="$emit('updateNoteError', $event)"
+          @openForm="updateDiscussionWithOpenForm"
+          @click.native.stop="updateActiveDiscussion(discussion.notes[0].id)"
+        />
+      </gl-collapse>
+    </template>
+    <slot name="replyForm"></slot>
+  </div>
+</template>

app/assets/javascripts/design_management_new/components/image.vue

+<script>
+import { throttle } from 'lodash';
+import { GlIcon } from '@gitlab/ui';
+
+export default {
+  components: {
+    GlIcon,
+  },
+  props: {
+    image: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    name: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    scale: {
+      type: Number,
+      required: false,
+      default: 1,
+    },
+  },
+  data() {
+    return {
+      baseImageSize: null,
+      imageStyle: null,
+      imageError: false,
+    };
+  },
+  watch: {
+    scale(val) {
+      this.zoom(val);
+    },
+  },
+  beforeDestroy() {
+    window.removeEventListener('resize', this.resizeThrottled, false);
+  },
+  mounted() {
+    this.onImgLoad();
+
+    this.resizeThrottled = throttle(() => {
+      // NOTE: if imageStyle is set, then baseImageSize
+      // won't change due to resize. We must still emit a
+      // `resize` event so that the parent can handle
+      // resizes appropriately (e.g. for design_overlay)
+      this.setBaseImageSize();
+    }, 400);
+    window.addEventListener('resize', this.resizeThrottled, false);
+  },
+  methods: {
+    onImgLoad() {
+      requestIdleCallback(this.setBaseImageSize, { timeout: 1000 });
+    },
+    onImgError() {
+      this.imageError = true;
+    },
+    setBaseImageSize() {
+      const { contentImg } = this.$refs;
+      if (!contentImg || contentImg.offsetHeight === 0 || contentImg.offsetWidth === 0) return;
+
+      this.baseImageSize = {
+        height: contentImg.offsetHeight,
+        width: contentImg.offsetWidth,
+      };
+      this.onResize({ width: this.baseImageSize.width, height: this.baseImageSize.height });
+    },
+    onResize({ width, height }) {
+      this.$emit('resize', { width, height });
+    },
+    zoom(amount) {
+      if (amount === 1) {
+        this.imageStyle = null;
+        this.$nextTick(() => {
+          this.setBaseImageSize();
+        });
+        return;
+      }
+      const width = this.baseImageSize.width * amount;
+      const height = this.baseImageSize.height * amount;
+
+      this.imageStyle = {
+        width: `${width}px`,
+        height: `${height}px`,
+      };
+
+      this.onResize({ width, height });
+    },
+  },
+};
+</script>
+
+<template>
+  <div class="m-auto js-design-image">
+    <gl-icon v-if="imageError" class="text-secondary-100" name="media-broken" :size="48" />
+    <img
+      v-show="!imageError"
+      ref="contentImg"
+      class="mh-100"
+      :src="image"
+      :alt="name"
+      :style="imageStyle"
+      :class="{ 'img-fluid': !imageStyle }"
+      @error="onImgError"
+      @load="onImgLoad"
+    />
+  </div>
+</template>

app/assets/javascripts/design_management_new/components/list/item.vue

+<script>
+import { GlLoadingIcon, GlIcon, GlIntersectionObserver } from '@gitlab/ui';
+import Icon from '~/vue_shared/components/icon.vue';
+import Timeago from '~/vue_shared/components/time_ago_tooltip.vue';
+import { n__, __ } from '~/locale';
+import { DESIGN_ROUTE_NAME } from '../../router/constants';
+
+export default {
+  components: {
+    GlLoadingIcon,
+    GlIntersectionObserver,
+    GlIcon,
+    Icon,
+    Timeago,
+  },
+  props: {
+    id: {
+      type: [Number, String],
+      required: true,
+    },
+    event: {
+      type: String,
+      required: true,
+    },
+    notesCount: {
+      type: Number,
+      required: true,
+    },
+    image: {
+      type: String,
+      required: true,
+    },
+    filename: {
+      type: String,
+      required: true,
+    },
+    updatedAt: {
+      type: String,
+      required: false,
+      default: null,
+    },
+    isUploading: {
+      type: Boolean,
+      required: false,
+      default: true,
+    },
+    imageV432x230: {
+      type: String,
+      required: false,
+      default: null,
+    },
+  },
+  data() {
+    return {
+      imageLoading: true,
+      imageError: false,
+      wasInView: false,
+    };
+  },
+  computed: {
+    icon() {
+      const normalizedEvent = this.event.toLowerCase();
+      const icons = {
+        creation: {
+          name: 'file-addition-solid',
+          classes: 'text-success-500',
+          tooltip: __('Added in this version'),
+        },
+        modification: {
+          name: 'file-modified-solid',
+          classes: 'text-primary-500',
+          tooltip: __('Modified in this version'),
+        },
+        deletion: {
+          name: 'file-deletion-solid',
+          classes: 'text-danger-500',
+          tooltip: __('Deleted in this version'),
+        },
+      };
+
+      return icons[normalizedEvent] ? icons[normalizedEvent] : {};
+    },
+    notesLabel() {
+      return n__('%d comment', '%d comments', this.notesCount);
+    },
+    imageLink() {
+      return this.wasInView ? this.imageV432x230 || this.image : '';
+    },
+    showLoadingSpinner() {
+      return this.imageLoading || this.isUploading;
+    },
+    showImageErrorIcon() {
+      return this.wasInView && this.imageError;
+    },
+    showImage() {
+      return !this.showLoadingSpinner && !this.showImageErrorIcon;
+    },
+  },
+  methods: {
+    onImageLoad() {
+      this.imageLoading = false;
+      this.imageError = false;
+    },
+    onImageError() {
+      this.imageLoading = false;
+      this.imageError = true;
+    },
+    onAppear() {
+      // do nothing if image has previously
+      // been in view
+      if (this.wasInView) {
+        return;
+      }
+
+      this.wasInView = true;
+      this.imageLoading = true;
+    },
+  },
+  DESIGN_ROUTE_NAME,
+};
+</script>
+
+<template>
+  <router-link
+    :to="{
+      name: $options.DESIGN_ROUTE_NAME,
+      params: { id: filename },
+      query: $route.query,
+    }"
+    class="card cursor-pointer text-plain js-design-list-item design-list-item"
+  >
+    <div class="card-body p-0 d-flex-center overflow-hidden position-relative">
+      <div v-if="icon.name" class="design-event position-absolute">
+        <span :title="icon.tooltip" :aria-label="icon.tooltip">
+          <icon :name="icon.name" :size="18" :class="icon.classes" />
+        </span>
+      </div>
+      <gl-intersection-observer @appear="onAppear">
+        <gl-loading-icon v-if="showLoadingSpinner" size="md" />
+        <gl-icon
+          v-else-if="showImageErrorIcon"
+          name="media-broken"
+          class="text-secondary"
+          :size="32"
+        />
+        <img
+          v-show="showImage"
+          :src="imageLink"
+          :alt="filename"
+          class="block mx-auto mw-100 mh-100 design-img"
+          data-qa-selector="design_image"
+          @load="onImageLoad"
+          @error="onImageError"
+        />
+      </gl-intersection-observer>
+    </div>
+    <div class="card-footer d-flex w-100">
+      <div class="d-flex flex-column str-truncated-100">
+        <span class="bold str-truncated-100" data-qa-selector="design_file_name">{{
+          filename
+        }}</span>
+        <span v-if="updatedAt" class="str-truncated-100">
+          {{ __('Updated') }} <timeago :time="updatedAt" tooltip-placement="bottom" />
+        </span>
+      </div>
+      <div v-if="notesCount" class="ml-auto d-flex align-items-center text-secondary">
+        <icon name="comments" class="ml-1" />
+        <span :aria-label="notesLabel" class="ml-1">
+          {{ notesCount }}
+        </span>
+      </div>
+    </div>
+  </router-link>
+</template>

app/assets/javascripts/design_management_new/components/toolbar/index.vue

+<script>
+import { GlDeprecatedButton } from '@gitlab/ui';
+import { __, sprintf } from '~/locale';
+import Icon from '~/vue_shared/components/icon.vue';
+import timeagoMixin from '~/vue_shared/mixins/timeago';
+import Pagination from './pagination.vue';
+import DeleteButton from '../delete_button.vue';
+import permissionsQuery from '../../graphql/queries/design_permissions.query.graphql';
+import appDataQuery from '../../graphql/queries/app_data.query.graphql';
+import { DESIGNS_ROUTE_NAME } from '../../router/constants';
+
+export default {
+  components: {
+    Icon,
+    Pagination,
+    DeleteButton,
+    GlDeprecatedButton,
+  },
+  mixins: [timeagoMixin],
+  props: {
+    id: {
+      type: String,
+      required: true,
+    },
+    isDeleting: {
+      type: Boolean,
+      required: true,
+    },
+    filename: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    updatedAt: {
+      type: String,
+      required: false,
+      default: null,
+    },
+    updatedBy: {
+      type: Object,
+      required: false,
+      default: () => ({}),
+    },
+    isLatestVersion: {
+      type: Boolean,
+      required: true,
+    },
+    image: {
+      type: String,
+      required: true,
+    },
+  },
+  data() {
+    return {
+      permissions: {
+        createDesign: false,
+      },
+      projectPath: '',
+      issueIid: null,
+    };
+  },
+  apollo: {
+    appData: {
+      query: appDataQuery,
+      manual: true,
+      result({ data: { projectPath, issueIid } }) {
+        this.projectPath = projectPath;
+        this.issueIid = issueIid;
+      },
+    },
+    permissions: {
+      query: permissionsQuery,
+      variables() {
+        return {
+          fullPath: this.projectPath,
+          iid: this.issueIid,
+        };
+      },
+      update: data => data.project.issue.userPermissions,
+    },
+  },
+  computed: {
+    updatedText() {
+      return sprintf(__('Updated %{updated_at} by %{updated_by}'), {
+        updated_at: this.timeFormatted(this.updatedAt),
+        updated_by: this.updatedBy.name,
+      });
+    },
+    canDeleteDesign() {
+      return this.permissions.createDesign;
+    },
+  },
+  DESIGNS_ROUTE_NAME,
+};
+</script>
+
+<template>
+  <header class="d-flex p-2 bg-white align-items-center js-design-header">
+    <router-link
+      :to="{
+        name: $options.DESIGNS_ROUTE_NAME,
+        query: $route.query,
+      }"
+      :aria-label="s__('DesignManagement|Go back to designs')"
+      class="mr-3 text-plain d-flex justify-content-center align-items-center"
+    >
+      <icon :size="18" name="close" />
+    </router-link>
+    <div class="overflow-hidden d-flex align-items-center">
+      <h2 class="m-0 str-truncated-100 gl-font-base">{{ filename }}</h2>
+      <small v-if="updatedAt" class="text-secondary">{{ updatedText }}</small>
+    </div>
+    <pagination :id="id" class="ml-auto flex-shrink-0" />
+    <gl-deprecated-button :href="image" class="mr-2">
+      <icon :size="18" name="download" />
+    </gl-deprecated-button>
+    <delete-button
+      v-if="isLatestVersion && canDeleteDesign"
+      :is-deleting="isDeleting"
+      button-variant="danger"
+      @deleteSelectedDesigns="$emit('delete')"
+    >
+      <icon :size="18" name="remove" />
+    </delete-button>
+  </header>
+</template>

app/assets/javascripts/design_management_new/components/toolbar/pagination.vue

+<script>
+/* global Mousetrap */
+import 'mousetrap';
+import { s__, sprintf } from '~/locale';
+import PaginationButton from './pagination_button.vue';
+import allDesignsMixin from '../../mixins/all_designs';
+import { DESIGN_ROUTE_NAME } from '../../router/constants';
+
+export default {
+  components: {
+    PaginationButton,
+  },
+  mixins: [allDesignsMixin],
+  props: {
+    id: {
+      type: String,
+      required: true,
+    },
+  },
+  computed: {
+    designsCount() {
+      return this.designs.length;
+    },
+    currentIndex() {
+      return this.designs.findIndex(design => design.filename === this.id);
+    },
+    paginationText() {
+      return sprintf(s__('DesignManagement|%{current_design} of %{designs_count}'), {
+        current_design: this.currentIndex + 1,
+        designs_count: this.designsCount,
+      });
+    },
+    previousDesign() {
+      if (!this.designsCount) return null;
+
+      return this.designs[this.currentIndex - 1];
+    },
+    nextDesign() {
+      if (!this.designsCount) return null;
+
+      return this.designs[this.currentIndex + 1];
+    },
+  },
+  mounted() {
+    Mousetrap.bind('left', () => this.navigateToDesign(this.previousDesign));
+    Mousetrap.bind('right', () => this.navigateToDesign(this.nextDesign));
+  },
+  beforeDestroy() {
+    Mousetrap.unbind(['left', 'right'], this.navigateToDesign);
+  },
+  methods: {
+    navigateToDesign(design) {
+      if (design) {
+        this.$router.push({
+          name: DESIGN_ROUTE_NAME,
+          params: { id: design.filename },
+          query: this.$route.query,
+        });
+      }
+    },
+  },
+};
+</script>
+
+<template>
+  <div v-if="designsCount" class="d-flex align-items-center">
+    {{ paginationText }}
+    <div class="btn-group ml-3 mr-3">
+      <pagination-button
+        :design="previousDesign"
+        :title="s__('DesignManagement|Go to previous design')"
+        icon-name="angle-left"
+        class="js-previous-design"
+      />
+      <pagination-button
+        :design="nextDesign"
+        :title="s__('DesignManagement|Go to next design')"
+        icon-name="angle-right"
+        class="js-next-design"
+      />
+    </div>
+  </div>
+</template>

app/assets/javascripts/design_management_new/components/toolbar/pagination_button.vue

+<script>
+import Icon from '~/vue_shared/components/icon.vue';
+import { DESIGN_ROUTE_NAME } from '../../router/constants';
+
+export default {
+  components: {
+    Icon,
+  },
+  props: {
+    design: {
+      type: Object,
+      required: false,
+      default: null,
+    },
+    title: {
+      type: String,
+      required: true,
+    },
+    iconName: {
+      type: String,
+      required: true,
+    },
+  },
+  computed: {
+    designLink() {
+      if (!this.design) return {};
+
+      return {
+        name: DESIGN_ROUTE_NAME,
+        params: { id: this.design.filename },
+        query: this.$route.query,
+      };
+    },
+  },
+};
+</script>
+
+<template>
+  <router-link
+    :to="designLink"
+    :disabled="!design"
+    :class="{ disabled: !design }"
+    :aria-label="title"
+    class="btn btn-default"
+  >
+    <icon :name="iconName" />
+  </router-link>
+</template>

app/assets/javascripts/design_management_new/components/upload/button.vue

+<script>
+import { GlDeprecatedButton, GlLoadingIcon, GlTooltipDirective } from '@gitlab/ui';
+import { VALID_DESIGN_FILE_MIMETYPE } from '../../constants';
+
+export default {
+  components: {
+    GlDeprecatedButton,
+    GlLoadingIcon,
+  },
+  directives: {
+    GlTooltip: GlTooltipDirective,
+  },
+  props: {
+    isSaving: {
+      type: Boolean,
+      required: true,
+    },
+  },
+  methods: {
+    openFileUpload() {
+      this.$refs.fileUpload.click();
+    },
+    onFileUploadChange(e) {
+      this.$emit('upload', e.target.files);
+    },
+  },
+  VALID_DESIGN_FILE_MIMETYPE,
+};
+</script>
+
+<template>
+  <div>
+    <gl-deprecated-button
+      v-gl-tooltip.hover
+      :title="
+        s__(
+          'DesignManagement|Adding a design with the same filename replaces the file in a new version.',
+        )
+      "
+      :disabled="isSaving"
+      variant="success"
+      @click="openFileUpload"
+    >
+      {{ s__('DesignManagement|Upload designs') }}
+      <gl-loading-icon v-if="isSaving" inline class="ml-1" />
+    </gl-deprecated-button>
+
+    <input
+      ref="fileUpload"
+      type="file"
+      name="design_file"
+      :accept="$options.VALID_DESIGN_FILE_MIMETYPE.mimetype"
+      class="hide"
+      multiple
+      @change="onFileUploadChange"
+    />
+  </div>
+</template>

app/assets/javascripts/design_management_new/components/upload/design_dropzone.vue

+<script>
+import { GlIcon, GlLink, GlSprintf } from '@gitlab/ui';
+import createFlash from '~/flash';
+import uploadDesignMutation from '../../graphql/mutations/upload_design.mutation.graphql';
+import { UPLOAD_DESIGN_INVALID_FILETYPE_ERROR } from '../../utils/error_messages';
+import { isValidDesignFile } from '../../utils/design_management_utils';
+import { VALID_DATA_TRANSFER_TYPE, VALID_DESIGN_FILE_MIMETYPE } from '../../constants';
+
+export default {
+  components: {
+    GlIcon,
+    GlLink,
+    GlSprintf,
+  },
+  data() {
+    return {
+      dragCounter: 0,
+      isDragDataValid: false,
+    };
+  },
+  computed: {
+    dragging() {
+      return this.dragCounter !== 0;
+    },
+  },
+  methods: {
+    isValidUpload(files) {
+      return files.every(isValidDesignFile);
+    },
+    isValidDragDataType({ dataTransfer }) {
+      return Boolean(dataTransfer && dataTransfer.types.some(t => t === VALID_DATA_TRANSFER_TYPE));
+    },
+    ondrop({ dataTransfer = {} }) {
+      this.dragCounter = 0;
+      // User already had feedback when dropzone was active, so bail here
+      if (!this.isDragDataValid) {
+        return;
+      }
+
+      const { files } = dataTransfer;
+      if (!this.isValidUpload(Array.from(files))) {
+        createFlash(UPLOAD_DESIGN_INVALID_FILETYPE_ERROR);
+        return;
+      }
+
+      this.$emit('change', files);
+    },
+    ondragenter(e) {
+      this.dragCounter += 1;
+      this.isDragDataValid = this.isValidDragDataType(e);
+    },
+    ondragleave() {
+      this.dragCounter -= 1;
+    },
+    openFileUpload() {
+      this.$refs.fileUpload.click();
+    },
+    onDesignInputChange(e) {
+      this.$emit('change', e.target.files);
+    },
+  },
+  uploadDesignMutation,
+  VALID_DESIGN_FILE_MIMETYPE,
+};
+</script>
+
+<template>
+  <div
+    class="w-100 position-relative"
+    @dragstart.prevent.stop
+    @dragend.prevent.stop
+    @dragover.prevent.stop
+    @dragenter.prevent.stop="ondragenter"
+    @dragleave.prevent.stop="ondragleave"
+    @drop.prevent.stop="ondrop"
+  >
+    <slot>
+      <button
+        class="card design-dropzone-card design-dropzone-border w-100 h-100 d-flex-center p-3"
+        @click="openFileUpload"
+      >
+        <div class="d-flex-center flex-column text-center">
+          <gl-icon name="doc-new" :size="48" class="mb-4" />
+          <p>
+            <gl-sprintf
+              :message="
+                __(
+                  '%{lineOneStart}Drag and drop to upload your designs%{lineOneEnd} or %{linkStart}click to upload%{linkEnd}.',
+                )
+              "
+            >
+              <template #lineOne="{ content }"
+                ><span class="d-block">{{ content }}</span>
+              </template>
+
+              <template #link="{ content }">
+                <gl-link class="h-100 w-100" @click.stop="openFileUpload">{{ content }}</gl-link>
+              </template>
+            </gl-sprintf>
+          </p>
+        </div>
+      </button>
+
+      <input
+        ref="fileUpload"
+        type="file"
+        name="design_file"
+        :accept="$options.VALID_DESIGN_FILE_MIMETYPE.mimetype"
+        class="hide"
+        multiple
+        @change="onDesignInputChange"
+      />
+    </slot>
+    <transition name="design-dropzone-fade">
+      <div
+        v-show="dragging"
+        class="card design-dropzone-border design-dropzone-overlay w-100 h-100 position-absolute d-flex-center p-3 bg-white"
+      >
+        <div v-show="!isDragDataValid" class="mw-50 text-center">
+          <h3>{{ __('Oh no!') }}</h3>
+          <span>{{
+            __(
+              'You are trying to upload something other than an image. Please upload a .png, .jpg, .jpeg, .gif, .bmp, .tiff or .ico.',
+            )
+          }}</span>
+        </div>
+        <div v-show="isDragDataValid" class="mw-50 text-center">
+          <h3>{{ __('Incoming!') }}</h3>
+          <span>{{ __('Drop your designs to start your upload.') }}</span>
+        </div>
+      </div>
+    </transition>
+  </div>
+</template>

app/assets/javascripts/design_management_new/components/upload/design_version_dropdown.vue

+<script>
+import { GlDropdown, GlDropdownItem } from '@gitlab/ui';
+import { __, sprintf } from '~/locale';
+import allVersionsMixin from '../../mixins/all_versions';
+import { findVersionId } from '../../utils/design_management_utils';
+
+export default {
+  components: {
+    GlDropdown,
+    GlDropdownItem,
+  },
+  mixins: [allVersionsMixin],
+  computed: {
+    queryVersion() {
+      return this.$route.query.version;
+    },
+    currentVersionIdx() {
+      if (!this.queryVersion) return 0;
+
+      const idx = this.allVersions.findIndex(
+        version => this.findVersionId(version.node.id) === this.queryVersion,
+      );
+
+      // if the currentVersionId isn't a valid version (i.e. not in allVersions)
+      // then return the latest version (index 0)
+      return idx !== -1 ? idx : 0;
+    },
+    currentVersionId() {
+      if (this.queryVersion) return this.queryVersion;
+
+      const currentVersion = this.allVersions[this.currentVersionIdx];
+      return this.findVersionId(currentVersion.node.id);
+    },
+    dropdownText() {
+      if (this.isLatestVersion) {
+        return __('Showing Latest Version');
+      }
+      // allVersions is sorted in reverse chronological order (latest first)
+      const currentVersionNumber = this.allVersions.length - this.currentVersionIdx;
+
+      return sprintf(__('Showing Version #%{versionNumber}'), {
+        versionNumber: currentVersionNumber,
+      });
+    },
+  },
+  methods: {
+    findVersionId,
+  },
+};
+</script>
+
+<template>
+  <gl-dropdown :text="dropdownText" variant="link" class="design-version-dropdown">
+    <gl-dropdown-item v-for="(version, index) in allVersions" :key="version.node.id">
+      <router-link
+        class="d-flex js-version-link"
+        :to="{ path: $route.path, query: { version: findVersionId(version.node.id) } }"
+      >
+        <div class="flex-grow-1 ml-2">
+          <div>
+            <strong
+              >{{ __('Version') }} {{ allVersions.length - index }}
+              <span v-if="findVersionId(version.node.id) === latestVersionId"
+                >({{ __('latest') }})</span
+              >
+            </strong>
+          </div>
+        </div>
+        <i
+          v-if="findVersionId(version.node.id) === currentVersionId"
+          class="fa fa-check pull-right"
+        ></i>
+      </router-link>
+    </gl-dropdown-item>
+  </gl-dropdown>
+</template>

app/assets/javascripts/design_management_new/constants.js

+// WARNING: replace this with something
+// more sensical as per https://gitlab.com/gitlab-org/gitlab/issues/118611
+export const VALID_DESIGN_FILE_MIMETYPE = {
+  mimetype: 'image/*',
+  regex: /image\/.+/,
+};
+
+// https://developer.mozilla.org/en-US/docs/Web/API/DataTransfer/types
+export const VALID_DATA_TRANSFER_TYPE = 'Files';
+
+export const ACTIVE_DISCUSSION_SOURCE_TYPES = {
+  pin: 'pin',
+  discussion: 'discussion',
+};
+
+export const DESIGN_DETAIL_LAYOUT_CLASSLIST = ['design-detail-layout', 'overflow-hidden', 'm-0'];

app/assets/javascripts/design_management_new/graphql.js

+import Vue from 'vue';
+import VueApollo from 'vue-apollo';
+import { uniqueId } from 'lodash';
+import { defaultDataIdFromObject } from 'apollo-cache-inmemory';
+import createDefaultClient from '~/lib/graphql';
+import activeDiscussionQuery from './graphql/queries/active_discussion.query.graphql';
+import typeDefs from './graphql/typedefs.graphql';
+
+Vue.use(VueApollo);
+
+const resolvers = {
+  Mutation: {
+    updateActiveDiscussion: (_, { id = null, source }, { cache }) => {
+      const data = cache.readQuery({ query: activeDiscussionQuery });
+      data.activeDiscussion = {
+        __typename: 'ActiveDiscussion',
+        id,
+        source,
+      };
+      cache.writeQuery({ query: activeDiscussionQuery, data });
+    },
+  },
+};
+
+const defaultClient = createDefaultClient(
+  resolvers,
+  // This config is added temporarily to resolve an issue with duplicate design IDs.
+  // Should be removed as soon as https://gitlab.com/gitlab-org/gitlab/issues/13495 is resolved
+  {
+    cacheConfig: {
+      dataIdFromObject: object => {
+        // eslint-disable-next-line no-underscore-dangle, @gitlab/require-i18n-strings
+        if (object.__typename === 'Design') {
+          return object.id && object.image ? `${object.id}-${object.image}` : uniqueId();
+        }
+        return defaultDataIdFromObject(object);
+      },
+    },
+    typeDefs,
+  },
+);
+
+export default new VueApollo({
+  defaultClient,
+});

app/assets/javascripts/design_management_new/graphql/fragments/design.fragment.graphql

+#import "./design_note.fragment.graphql"
+#import "./design_list.fragment.graphql"
+#import "./diff_refs.fragment.graphql"
+#import "./discussion_resolved_status.fragment.graphql"
+
+fragment DesignItem on Design {
+  ...DesignListItem
+  fullPath
+  diffRefs {
+    ...DesignDiffRefs
+  }
+  discussions {
+    nodes {
+      id
+      replyId
+      ...ResolvedStatus
+      notes {
+        nodes {
+          ...DesignNote
+        }
+      }
+    }
+  }
+}

app/assets/javascripts/design_management_new/graphql/fragments/design_list.fragment.graphql

+fragment DesignListItem on Design {
+  id
+  event
+  filename
+  notesCount
+  image
+  imageV432x230
+}

app/assets/javascripts/design_management_new/graphql/fragments/design_note.fragment.graphql

+#import "./diff_refs.fragment.graphql"
+#import "~/graphql_shared/fragments/author.fragment.graphql"
+#import "./note_permissions.fragment.graphql"
+
+fragment DesignNote on Note {
+  id
+  author {
+    ...Author
+  }
+  body
+  bodyHtml
+  createdAt
+  resolved
+  position {
+    diffRefs {
+      ...DesignDiffRefs
+    }
+    x
+    y
+    height
+    width
+  }
+  userPermissions {
+    ...DesignNotePermissions
+  }
+  discussion {
+    id
+  }
+}

app/assets/javascripts/design_management_new/graphql/fragments/diff_refs.fragment.graphql

+fragment DesignDiffRefs on DiffRefs {
+  baseSha
+  startSha
+  headSha
+}

app/assets/javascripts/design_management_new/graphql/fragments/discussion_resolved_status.fragment.graphql

+fragment ResolvedStatus on Discussion {
+  resolvable
+  resolved
+  resolvedAt
+  resolvedBy {
+    name
+    webUrl
+  }
+}

app/assets/javascripts/design_management_new/graphql/fragments/note_permissions.fragment.graphql

+fragment DesignNotePermissions on NotePermissions {
+  adminNote
+}

app/assets/javascripts/design_management_new/graphql/fragments/version.fragment.graphql

+fragment VersionListItem on DesignVersion {
+  id
+  sha
+}

app/assets/javascripts/design_management_new/graphql/mutations/create_image_diff_note.mutation.graphql

+#import "../fragments/design_note.fragment.graphql"
+
+mutation createImageDiffNote($input: CreateImageDiffNoteInput!) {
+  createImageDiffNote(input: $input) {
+    note {
+      ...DesignNote
+      discussion {
+        id
+        replyId
+        notes {
+          edges {
+            node {
+              ...DesignNote
+            }
+          }
+        }
+      }
+    }
+    errors
+  }
+}

app/assets/javascripts/design_management_new/graphql/mutations/create_note.mutation.graphql

+#import "../fragments/design_note.fragment.graphql"
+
+mutation createNote($input: CreateNoteInput!) {
+  createNote(input: $input) {
+    note {
+      ...DesignNote
+    }
+    errors
+  }
+}

app/assets/javascripts/design_management_new/graphql/mutations/destroy_design.mutation.graphql

+#import "../fragments/version.fragment.graphql"
+
+mutation destroyDesign($filenames: [String!]!, $projectPath: ID!, $iid: ID!) {
+  designManagementDelete(input: { projectPath: $projectPath, iid: $iid, filenames: $filenames }) {
+    version {
+      ...VersionListItem
+    }
+    errors
+  }
+}

app/assets/javascripts/design_management_new/graphql/mutations/toggle_resolve_discussion.mutation.graphql

+#import "../fragments/design_note.fragment.graphql"
+#import "../fragments/discussion_resolved_status.fragment.graphql"
+
+mutation toggleResolveDiscussion($id: ID!, $resolve: Boolean!) {
+  discussionToggleResolve(input: { id: $id, resolve: $resolve }) {
+    discussion {
+      id
+      ...ResolvedStatus
+      notes {
+        nodes {
+          ...DesignNote
+        }
+      }
+    }
+    errors
+  }
+}

app/assets/javascripts/design_management_new/graphql/mutations/update_active_discussion.mutation.graphql

+mutation updateActiveDiscussion($id: String, $source: String) {
+  updateActiveDiscussion (id: $id, source: $source ) @client
+}

app/assets/javascripts/design_management_new/graphql/mutations/update_image_diff_note.mutation.graphql

+#import "../fragments/design_note.fragment.graphql"
+
+mutation updateImageDiffNote($input: UpdateImageDiffNoteInput!) {
+  updateImageDiffNote(input: $input) {
+    errors
+    note {
+      ...DesignNote
+    }
+  }
+}

app/assets/javascripts/design_management_new/graphql/mutations/update_note.mutation.graphql

+#import "../fragments/design_note.fragment.graphql"
+
+mutation updateNote($input: UpdateNoteInput!) {
+  updateNote(input: $input) {
+    note {
+      ...DesignNote
+    }
+    errors
+  }
+}

app/assets/javascripts/design_management_new/graphql/mutations/upload_design.mutation.graphql

+#import "../fragments/design.fragment.graphql"
+
+mutation uploadDesign($files: [Upload!]!, $projectPath: ID!, $iid: ID!) {
+  designManagementUpload(input: { projectPath: $projectPath, iid: $iid, files: $files }) {
+    designs {
+      ...DesignItem
+      versions {
+        edges {
+          node {
+            id
+            sha
+          }
+        }
+      },
+    }
+    skippedDesigns {
+      filename
+    }
+    errors
+  }
+}

app/assets/javascripts/design_management_new/graphql/queries/active_discussion.query.graphql

+query activeDiscussion {
+  activeDiscussion @client {
+    id
+    source
+  }
+}

app/assets/javascripts/design_management_new/graphql/queries/app_data.query.graphql

+query projectFullPath {
+  projectPath @client
+  issueIid @client
+}

app/assets/javascripts/design_management_new/graphql/queries/design_permissions.query.graphql

+query permissions($fullPath: ID!, $iid: String!) {
+  project(fullPath: $fullPath) {
+    id
+    issue(iid: $iid) {
+      userPermissions {
+        createDesign
+      }
+    }
+  }
+}

app/assets/javascripts/design_management_new/graphql/queries/get_design.query.graphql

+#import "../fragments/design.fragment.graphql"
+#import "~/graphql_shared/fragments/author.fragment.graphql"
+
+query getDesign($fullPath: ID!, $iid: String!, $atVersion: ID, $filenames: [String!]) {
+  project(fullPath: $fullPath) {
+    id
+    issue(iid: $iid) {
+      designCollection {
+        designs(atVersion: $atVersion, filenames: $filenames) {
+          edges {
+            node {
+              ...DesignItem
+              issue {
+                title
+                webPath
+                webUrl
+                participants {
+                  edges {
+                    node {
+                      ...Author
+                    }
+                  }
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  }
+}

app/assets/javascripts/design_management_new/graphql/queries/get_design_list.query.graphql

+#import "../fragments/design_list.fragment.graphql"
+#import "../fragments/version.fragment.graphql"
+
+query getDesignList($fullPath: ID!, $iid: String!, $atVersion: ID) {
+  project(fullPath: $fullPath) {
+    id
+    issue(iid: $iid) {
+      designCollection {
+        designs(atVersion: $atVersion) {
+          edges {
+            node {
+              ...DesignListItem
+            }
+          }
+        }
+        versions {
+          edges {
+            node {
+              ...VersionListItem
+            }
+          }
+        }
+      }
+    }
+  }
+}

app/assets/javascripts/design_management_new/graphql/typedefs.graphql

+type ActiveDiscussion {
+  id: ID
+  source: String
+}
+
+extend type Query {
+  activeDiscussion: ActiveDiscussion
+}
+
+extend type Mutation {
+  updateActiveDiscussion(id: ID!, source: String!): Boolean
+}

app/assets/javascripts/design_management_new/index.js

+import $ from 'jquery';
+import Vue from 'vue';
+import createRouter from './router';
+import App from './components/app.vue';
+import apolloProvider from './graphql';
+import getDesignListQuery from './graphql/queries/get_design_list.query.graphql';
+import { DESIGNS_ROUTE_NAME, ROOT_ROUTE_NAME } from './router/constants';
+
+export default () => {
+  const el = document.querySelector('.js-design-management-new');
+  const badge = document.querySelector('.js-designs-count');
+  const { issueIid, projectPath, issuePath } = el.dataset;
+  const router = createRouter(issuePath);
+
+  $('.js-issue-tabs').on('shown.bs.tab', ({ target: { id } }) => {
+    if (id === 'designs' && router.currentRoute.name === ROOT_ROUTE_NAME) {
+      router.push({ name: DESIGNS_ROUTE_NAME });
+    } else if (id === 'discussion') {
+      router.push({ name: ROOT_ROUTE_NAME });
+    }
+  });
+
+  apolloProvider.clients.defaultClient.cache.writeData({
+    data: {
+      projectPath,
+      issueIid,
+      activeDiscussion: {
+        __typename: 'ActiveDiscussion',
+        id: null,
+        source: null,
+      },
+    },
+  });
+
+  apolloProvider.clients.defaultClient
+    .watchQuery({
+      query: getDesignListQuery,
+      variables: {
+        fullPath: projectPath,
+        iid: issueIid,
+        atVersion: null,
+      },
+    })
+    .subscribe(({ data }) => {
+      if (badge) {
+        badge.textContent = data.project.issue.designCollection.designs.edges.length;
+      }
+    });
+
+  return new Vue({
+    el,
+    router,
+    apolloProvider,
+    render(createElement) {
+      return createElement(App);
+    },
+  });
+};

app/assets/javascripts/design_management_new/mixins/all_designs.js

+import { propertyOf } from 'lodash';
+import createFlash from '~/flash';
+import { s__ } from '~/locale';
+import getDesignListQuery from '../graphql/queries/get_design_list.query.graphql';
+import { extractNodes } from '../utils/design_management_utils';
+import allVersionsMixin from './all_versions';
+import { DESIGNS_ROUTE_NAME } from '../router/constants';
+
+export default {
+  mixins: [allVersionsMixin],
+  apollo: {
+    designs: {
+      query: getDesignListQuery,
+      variables() {
+        return {
+          fullPath: this.projectPath,
+          iid: this.issueIid,
+          atVersion: this.designsVersion,
+        };
+      },
+      update: data => {
+        const designEdges = propertyOf(data)(['project', 'issue', 'designCollection', 'designs']);
+        if (designEdges) {
+          return extractNodes(designEdges);
+        }
+        return [];
+      },
+      error() {
+        this.error = true;
+      },
+      result() {
+        if (this.$route.query.version && !this.hasValidVersion) {
+          createFlash(
+            s__(
+              'DesignManagement|Requested design version does not exist. Showing latest version instead',
+            ),
+          );
+          this.$router.replace({ name: DESIGNS_ROUTE_NAME, query: { version: undefined } });
+        }
+      },
+    },
+  },
+  data() {
+    return {
+      designs: [],
+      error: false,
+    };
+  },
+};

app/assets/javascripts/design_management_new/mixins/all_versions.js

+import getDesignListQuery from '../graphql/queries/get_design_list.query.graphql';
+import appDataQuery from '../graphql/queries/app_data.query.graphql';
+import { findVersionId } from '../utils/design_management_utils';
+
+export default {
+  apollo: {
+    appData: {
+      query: appDataQuery,
+      manual: true,
+      result({ data: { projectPath, issueIid } }) {
+        this.projectPath = projectPath;
+        this.issueIid = issueIid;
+      },
+    },
+    allVersions: {
+      query: getDesignListQuery,
+      variables() {
+        return {
+          fullPath: this.projectPath,
+          iid: this.issueIid,
+          atVersion: null,
+        };
+      },
+      update: data => data.project.issue.designCollection.versions.edges,
+    },
+  },
+  computed: {
+    hasValidVersion() {
+      return (
+        this.$route.query.version &&
+        this.allVersions &&
+        this.allVersions.some(version => version.node.id.endsWith(this.$route.query.version))
+      );
+    },
+    designsVersion() {
+      return this.hasValidVersion
+        ? `gid://gitlab/DesignManagement::Version/${this.$route.query.version}`
+        : null;
+    },
+    latestVersionId() {
+      const latestVersion = this.allVersions[0];
+      return latestVersion && findVersionId(latestVersion.node.id);
+    },
+    isLatestVersion() {
+      if (this.allVersions.length > 0) {
+        return (
+          !this.$route.query.version ||
+          !this.latestVersionId ||
+          this.$route.query.version === this.latestVersionId
+        );
+      }
+      return true;
+    },
+  },
+  data() {
+    return {
+      allVersions: [],
+      projectPath: '',
+      issueIid: null,
+    };
+  },
+};

app/assets/javascripts/design_management_new/router/constants.js

+export const ROOT_ROUTE_NAME = 'root';
+export const DESIGNS_ROUTE_NAME = 'designs';
+export const DESIGN_ROUTE_NAME = 'design';

app/assets/javascripts/design_management_new/router/index.js

+import $ from 'jquery';
+import Vue from 'vue';
+import VueRouter from 'vue-router';
+import routes from './routes';
+import { DESIGN_ROUTE_NAME } from './constants';
+import { getPageLayoutElement } from '~/design_management_new/utils/design_management_utils';
+import { DESIGN_DETAIL_LAYOUT_CLASSLIST } from '../constants';
+
+Vue.use(VueRouter);
+
+export default function createRouter(base) {
+  const router = new VueRouter({
+    base,
+    mode: 'history',
+    routes,
+  });
+  const pageEl = getPageLayoutElement();
+
+  router.beforeEach(({ meta: { el }, name }, _, next) => {
+    $(`#${el}`).tab('show');
+
+    // apply a fullscreen layout style in Design View (a.k.a design detail)
+    if (pageEl) {
+      if (name === DESIGN_ROUTE_NAME) {
+        pageEl.classList.add(...DESIGN_DETAIL_LAYOUT_CLASSLIST);
+      } else {
+        pageEl.classList.remove(...DESIGN_DETAIL_LAYOUT_CLASSLIST);
+      }
+    }
+
+    next();
+  });
+
+  return router;
+}

app/assets/javascripts/design_management_new/router/routes.js

+import Home from '../pages/index.vue';
+import DesignDetail from '../pages/design/index.vue';
+import { ROOT_ROUTE_NAME, DESIGNS_ROUTE_NAME, DESIGN_ROUTE_NAME } from './constants';
+
+export default [
+  {
+    name: ROOT_ROUTE_NAME,
+    path: '/',
+    component: Home,
+    meta: {
+      el: 'discussion',
+    },
+  },
+  {
+    name: DESIGNS_ROUTE_NAME,
+    path: '/designs',
+    component: Home,
+    meta: {
+      el: 'designs',
+    },
+    children: [
+      {
+        name: DESIGN_ROUTE_NAME,
+        path: ':id',
+        component: DesignDetail,
+        meta: {
+          el: 'designs',
+        },
+        beforeEnter(
+          {
+            params: { id },
+          },
+          from,
+          next,
+        ) {
+          if (typeof id === 'string') {
+            next();
+          }
+        },
+        props: ({ params: { id } }) => ({ id }),
+      },
+    ],
+  },
+];

app/assets/javascripts/design_management_new/utils/cache_update.js

+/* eslint-disable @gitlab/require-i18n-strings */
+
+import createFlash from '~/flash';
+import { extractCurrentDiscussion, extractDesign } from './design_management_utils';
+import {
+  ADD_IMAGE_DIFF_NOTE_ERROR,
+  UPDATE_IMAGE_DIFF_NOTE_ERROR,
+  ADD_DISCUSSION_COMMENT_ERROR,
+  designDeletionError,
+} from './error_messages';
+
+const deleteDesignsFromStore = (store, query, selectedDesigns) => {
+  const data = store.readQuery(query);
+
+  const changedDesigns = data.project.issue.designCollection.designs.edges.filter(
+    ({ node }) => !selectedDesigns.includes(node.filename),
+  );
+  data.project.issue.designCollection.designs.edges = [...changedDesigns];
+
+  store.writeQuery({
+    ...query,
+    data,
+  });
+};
+
+/**
+ * Adds a new version of designs to store
+ *
+ * @param {Object} store
+ * @param {Object} query
+ * @param {Object} version
+ */
+const addNewVersionToStore = (store, query, version) => {
+  if (!version) return;
+
+  const data = store.readQuery(query);
+  const newEdge = { node: version, __typename: 'DesignVersionEdge' };
+
+  data.project.issue.designCollection.versions.edges = [
+    newEdge,
+    ...data.project.issue.designCollection.versions.edges,
+  ];
+
+  store.writeQuery({
+    ...query,
+    data,
+  });
+};
+
+const addDiscussionCommentToStore = (store, createNote, query, queryVariables, discussionId) => {
+  const data = store.readQuery({
+    query,
+    variables: queryVariables,
+  });
+
+  const design = extractDesign(data);
+  const currentDiscussion = extractCurrentDiscussion(design.discussions, discussionId);
+  currentDiscussion.notes.nodes = [...currentDiscussion.notes.nodes, createNote.note];
+
+  design.notesCount += 1;
+  if (
+    !design.issue.participants.edges.some(
+      participant => participant.node.username === createNote.note.author.username,
+    )
+  ) {
+    design.issue.participants.edges = [
+      ...design.issue.participants.edges,
+      {
+        __typename: 'UserEdge',
+        node: {
+          __typename: 'User',
+          ...createNote.note.author,
+        },
+      },
+    ];
+  }
+  store.writeQuery({
+    query,
+    variables: queryVariables,
+    data: {
+      ...data,
+      design: {
+        ...design,
+      },
+    },
+  });
+};
+
+const addImageDiffNoteToStore = (store, createImageDiffNote, query, variables) => {
+  const data = store.readQuery({
+    query,
+    variables,
+  });
+  const newDiscussion = {
+    __typename: 'Discussion',
+    id: createImageDiffNote.note.discussion.id,
+    replyId: createImageDiffNote.note.discussion.replyId,
+    resolvable: true,
+    resolved: false,
+    resolvedAt: null,
+    resolvedBy: null,
+    notes: {
+      __typename: 'NoteConnection',
+      nodes: [createImageDiffNote.note],
+    },
+  };
+  const design = extractDesign(data);
+  const notesCount = design.notesCount + 1;
+  design.discussions.nodes = [...design.discussions.nodes, newDiscussion];
+  if (
+    !design.issue.participants.edges.some(
+      participant => participant.node.username === createImageDiffNote.note.author.username,
+    )
+  ) {
+    design.issue.participants.edges = [
+      ...design.issue.participants.edges,
+      {
+        __typename: 'UserEdge',
+        node: {
+          __typename: 'User',
+          ...createImageDiffNote.note.author,
+        },
+      },
+    ];
+  }
+  store.writeQuery({
+    query,
+    variables,
+    data: {
+      ...data,
+      design: {
+        ...design,
+        notesCount,
+      },
+    },
+  });
+};
+
+const updateImageDiffNoteInStore = (store, updateImageDiffNote, query, variables) => {
+  const data = store.readQuery({
+    query,
+    variables,
+  });
+
+  const design = extractDesign(data);
+  const discussion = extractCurrentDiscussion(
+    design.discussions,
+    updateImageDiffNote.note.discussion.id,
+  );
+
+  discussion.notes = {
+    ...discussion.notes,
+    nodes: [updateImageDiffNote.note, ...discussion.notes.nodes.slice(1)],
+  };
+
+  store.writeQuery({
+    query,
+    variables,
+    data: {
+      ...data,
+      design,
+    },
+  });
+};
+
+const addNewDesignToStore = (store, designManagementUpload, query) => {
+  const data = store.readQuery(query);
+
+  const newDesigns = data.project.issue.designCollection.designs.edges.reduce((acc, design) => {
+    if (!acc.find(d => d.filename === design.node.filename)) {
+      acc.push(design.node);
+    }
+
+    return acc;
+  }, designManagementUpload.designs);
+
+  let newVersionNode;
+  const findNewVersions = designManagementUpload.designs.find(design => design.versions);
+
+  if (findNewVersions) {
+    const findNewVersionsEdges = findNewVersions.versions.edges;
+
+    if (findNewVersionsEdges && findNewVersionsEdges.length) {
+      newVersionNode = [findNewVersionsEdges[0]];
+    }
+  }
+
+  const newVersions = [
+    ...(newVersionNode || []),
+    ...data.project.issue.designCollection.versions.edges,
+  ];
+
+  const updatedDesigns = {
+    __typename: 'DesignCollection',
+    designs: {
+      __typename: 'DesignConnection',
+      edges: newDesigns.map(design => ({
+        __typename: 'DesignEdge',
+        node: design,
+      })),
+    },
+    versions: {
+      __typename: 'DesignVersionConnection',
+      edges: newVersions,
+    },
+  };
+
+  data.project.issue.designCollection = updatedDesigns;
+
+  store.writeQuery({
+    ...query,
+    data,
+  });
+};
+
+const onError = (data, message) => {
+  createFlash(message);
+  throw new Error(data.errors);
+};
+
+export const hasErrors = ({ errors = [] }) => errors?.length;
+
+/**
+ * Updates a store after design deletion
+ *
+ * @param {Object} store
+ * @param {Object} data
+ * @param {Object} query
+ * @param {Array} designs
+ */
+export const updateStoreAfterDesignsDelete = (store, data, query, designs) => {
+  if (hasErrors(data)) {
+    onError(data, designDeletionError({ singular: designs.length === 1 }));
+  } else {
+    deleteDesignsFromStore(store, query, designs);
+    addNewVersionToStore(store, query, data.version);
+  }
+};
+
+export const updateStoreAfterAddDiscussionComment = (
+  store,
+  data,
+  query,
+  queryVariables,
+  discussionId,
+) => {
+  if (hasErrors(data)) {
+    onError(data, ADD_DISCUSSION_COMMENT_ERROR);
+  } else {
+    addDiscussionCommentToStore(store, data, query, queryVariables, discussionId);
+  }
+};
+
+export const updateStoreAfterAddImageDiffNote = (store, data, query, queryVariables) => {
+  if (hasErrors(data)) {
+    onError(data, ADD_IMAGE_DIFF_NOTE_ERROR);
+  } else {
+    addImageDiffNoteToStore(store, data, query, queryVariables);
+  }
+};
+
+export const updateStoreAfterUpdateImageDiffNote = (store, data, query, queryVariables) => {
+  if (hasErrors(data)) {
+    onError(data, UPDATE_IMAGE_DIFF_NOTE_ERROR);
+  } else {
+    updateImageDiffNoteInStore(store, data, query, queryVariables);
+  }
+};
+
+export const updateStoreAfterUploadDesign = (store, data, query) => {
+  if (hasErrors(data)) {
+    onError(data, data.errors[0]);
+  } else {
+    addNewDesignToStore(store, data, query);
+  }
+};

app/assets/javascripts/design_management_new/utils/design_management_utils.js

+import { uniqueId } from 'lodash';
+import { VALID_DESIGN_FILE_MIMETYPE } from '../constants';
+
+export const isValidDesignFile = ({ type }) =>
+  (type.match(VALID_DESIGN_FILE_MIMETYPE.regex) || []).length > 0;
+
+/**
+ * Returns formatted array that doesn't contain
+ * `edges`->`node` nesting
+ *
+ * @param {Array} elements
+ */
+
+export const extractNodes = elements => elements.edges.map(({ node }) => node);
+
+/**
+ * Returns formatted array of discussions that doesn't contain
+ * `edges`->`node` nesting for child notes
+ *
+ * @param {Array} discussions
+ */
+
+export const extractDiscussions = discussions =>
+  discussions.nodes.map((discussion, index) => ({
+    ...discussion,
+    index: index + 1,
+    notes: discussion.notes.nodes,
+  }));
+
+/**
+ * Returns a discussion with the given id from discussions array
+ *
+ * @param {Array} discussions
+ */
+
+export const extractCurrentDiscussion = (discussions, id) =>
+  discussions.nodes.find(discussion => discussion.id === id);
+
+export const findVersionId = id => (id.match('::Version/(.+$)') || [])[1];
+
+export const findNoteId = id => (id.match('DiffNote/(.+$)') || [])[1];
+
+export const extractDesigns = data => data.project.issue.designCollection.designs.edges;
+
+export const extractDesign = data => (extractDesigns(data) || [])[0]?.node;
+
+/**
+ * Generates optimistic response for a design upload mutation
+ * @param {Array<File>} files
+ */
+export const designUploadOptimisticResponse = files => {
+  const designs = files.map(file => ({
+    // False positive i18n lint: https://gitlab.com/gitlab-org/frontend/eslint-plugin-i18n/issues/26
+    // eslint-disable-next-line @gitlab/require-i18n-strings
+    __typename: 'Design',
+    id: -uniqueId(),
+    image: '',
+    imageV432x230: '',
+    filename: file.name,
+    fullPath: '',
+    notesCount: 0,
+    event: 'NONE',
+    diffRefs: {
+      __typename: 'DiffRefs',
+      baseSha: '',
+      startSha: '',
+      headSha: '',
+    },
+    discussions: {
+      __typename: 'DesignDiscussion',
+      nodes: [],
+    },
+    versions: {
+      __typename: 'DesignVersionConnection',
+      edges: {
+        __typename: 'DesignVersionEdge',
+        node: {
+          __typename: 'DesignVersion',
+          id: -uniqueId(),
+          sha: -uniqueId(),
+        },
+      },
+    },
+  }));
+
+  return {
+    // False positive i18n lint: https://gitlab.com/gitlab-org/frontend/eslint-plugin-i18n/issues/26
+    // eslint-disable-next-line @gitlab/require-i18n-strings
+    __typename: 'Mutation',
+    designManagementUpload: {
+      __typename: 'DesignManagementUploadPayload',
+      designs,
+      skippedDesigns: [],
+      errors: [],
+    },
+  };
+};
+
+/**
+ * Generates optimistic response for a design upload mutation
+ * @param {Array<File>} files
+ */
+export const updateImageDiffNoteOptimisticResponse = (note, { position }) => ({
+  // False positive i18n lint: https://gitlab.com/gitlab-org/frontend/eslint-plugin-i18n/issues/26
+  // eslint-disable-next-line @gitlab/require-i18n-strings
+  __typename: 'Mutation',
+  updateImageDiffNote: {
+    __typename: 'UpdateImageDiffNotePayload',
+    note: {
+      ...note,
+      position: {
+        ...note.position,
+        ...position,
+      },
+    },
+    errors: [],
+  },
+});
+
+const normalizeAuthor = author => ({
+  ...author,
+  web_url: author.webUrl,
+  avatar_url: author.avatarUrl,
+});
+
+export const extractParticipants = users => users.edges.map(({ node }) => normalizeAuthor(node));
+
+export const getPageLayoutElement = () => document.querySelector('.layout-page');

app/assets/javascripts/design_management_new/utils/error_messages.js

+import { __, s__, n__, sprintf } from '~/locale';
+
+export const ADD_DISCUSSION_COMMENT_ERROR = s__(
+  'DesignManagement|Could not add a new comment. Please try again.',
+);
+
+export const ADD_IMAGE_DIFF_NOTE_ERROR = s__(
+  'DesignManagement|Could not create new discussion. Please try again.',
+);
+
+export const UPDATE_IMAGE_DIFF_NOTE_ERROR = s__(
+  'DesignManagement|Could not update discussion. Please try again.',
+);
+
+export const UPDATE_NOTE_ERROR = s__('DesignManagement|Could not update note. Please try again.');
+
+export const UPLOAD_DESIGN_ERROR = s__(
+  'DesignManagement|Error uploading a new design. Please try again.',
+);
+
+export const UPLOAD_DESIGN_INVALID_FILETYPE_ERROR = __(
+  'Could not upload your designs as one or more files uploaded are not supported.',
+);
+
+export const DESIGN_NOT_FOUND_ERROR = __('Could not find design.');
+
+export const DESIGN_VERSION_NOT_EXIST_ERROR = __('Requested design version does not exist.');
+
+const DESIGN_UPLOAD_SKIPPED_MESSAGE = s__('DesignManagement|Upload skipped.');
+
+const ALL_DESIGNS_SKIPPED_MESSAGE = `${DESIGN_UPLOAD_SKIPPED_MESSAGE} ${s__(
+  'The designs you tried uploading did not change.',
+)}`;
+
+export const EXISTING_DESIGN_DROP_MANY_FILES_MESSAGE = __(
+  'You can only upload one design when dropping onto an existing design.',
+);
+
+export const EXISTING_DESIGN_DROP_INVALID_FILENAME_MESSAGE = __(
+  'You must upload a file with the same file name when dropping onto an existing design.',
+);
+
+const MAX_SKIPPED_FILES_LISTINGS = 5;
+
+const oneDesignSkippedMessage = filename =>
+  `${DESIGN_UPLOAD_SKIPPED_MESSAGE} ${sprintf(s__('DesignManagement|%{filename} did not change.'), {
+    filename,
+  })}`;
+
+/**
+ * Return warning message indicating that some (but not all) uploaded
+ * files were skipped.
+ * @param {Array<{ filename }>} skippedFiles
+ */
+const someDesignsSkippedMessage = skippedFiles => {
+  const designsSkippedMessage = `${DESIGN_UPLOAD_SKIPPED_MESSAGE} ${s__(
+    'Some of the designs you tried uploading did not change:',
+  )}`;
+
+  const moreText = sprintf(s__(`DesignManagement|and %{moreCount} more.`), {
+    moreCount: skippedFiles.length - MAX_SKIPPED_FILES_LISTINGS,
+  });
+
+  return `${designsSkippedMessage} ${skippedFiles
+    .slice(0, MAX_SKIPPED_FILES_LISTINGS)
+    .map(({ filename }) => filename)
+    .join(', ')}${skippedFiles.length > MAX_SKIPPED_FILES_LISTINGS ? `, ${moreText}` : '.'}`;
+};
+
+export const designDeletionError = ({ singular = true } = {}) => {
+  const design = singular ? __('a design') : __('designs');
+  return sprintf(s__('Could not delete %{design}. Please try again.'), {
+    design,
+  });
+};
+
+/**
+ * Return warning message, if applicable, that one, some or all uploaded
+ * files were skipped.
+ * @param {Array<{ filename }>} uploadedDesigns
+ * @param {Array<{ filename }>} skippedFiles
+ */
+export const designUploadSkippedWarning = (uploadedDesigns, skippedFiles) => {
+  if (skippedFiles.length === 0) {
+    return null;
+  }
+
+  if (skippedFiles.length === uploadedDesigns.length) {
+    const { filename } = skippedFiles[0];
+
+    return n__(oneDesignSkippedMessage(filename), ALL_DESIGNS_SKIPPED_MESSAGE, skippedFiles.length);
+  }
+
+  return someDesignsSkippedMessage(skippedFiles);
+};

app/assets/javascripts/design_management_new/utils/tracking.js

+import Tracking from '~/tracking';
+
+function assembleDesignPayload(payloadArr) {
+  return {
+    value: {
+      'internal-object-refrerer': payloadArr[0],
+      'design-collection-owner': payloadArr[1],
+      'design-version-number': payloadArr[2],
+      'design-is-current-version': payloadArr[3],
+    },
+  };
+}
+
+// Tracking Constants
+const DESIGN_TRACKING_PAGE_NAME = 'projects:issues:design';
+
+// eslint-disable-next-line import/prefer-default-export
+export function trackDesignDetailView(
+  referer = '',
+  owner = '',
+  designVersion = 1,
+  latestVersion = false,
+) {
+  Tracking.event(DESIGN_TRACKING_PAGE_NAME, 'design_viewed', {
+    label: 'design_viewed',
+    ...assembleDesignPayload([referer, owner, designVersion, latestVersion]),
+  });
+}

app/assets/javascripts/pages/projects/issues/show.js

@@ -13,14 +13,15 @@ export default function() {
   initSentryErrorStackTraceApp();
   initRelatedMergeRequestsApp();
 
-  // .js-design-management is currently EE-only.
-  // This will be moved to CE as part of https://gitlab.com/gitlab-org/gitlab/-/issues/212566#frontend
-  // at which point this conditional can be removed.
-  if (document.querySelector('.js-design-management')) {
-    import(/* webpackChunkName: 'design_management' */ '~/design_management')
-      .then(module => module.default())
-      .catch(() => {});
-  }
+  import(/* webpackChunkName: 'design_management' */ '~/design_management')
+    .then(module => module.default())
+    .catch(() => {});
+
+  // This will be removed when we remove the `design_management_moved` feature flag
+  // See https://gitlab.com/gitlab-org/gitlab/-/issues/223197
+  import(/* webpackChunkName: 'design_management' */ '~/design_management_new')
+    .then(module => module.default())
+    .catch(() => {});
 
   new Issue(); // eslint-disable-line no-new
   new ShortcutsIssuable(); // eslint-disable-line no-new

app/views/projects/issues/_design_management.html.haml

 - if @project.design_management_enabled?
-  .js-design-management{ data: { project_path: @project.full_path, issue_iid: @issue.iid, issue_path: project_issue_path(@project, @issue) } }
+  - if Feature.enabled?(:design_management_moved, @project)
+    .js-design-management-new{ data: { project_path: @project.full_path, issue_iid: @issue.iid, issue_path: project_issue_path(@project, @issue) } }
+  - else
+    .js-design-management{ data: { project_path: @project.full_path, issue_iid: @issue.iid, issue_path: project_issue_path(@project, @issue) } }
 - else
   .mt-4
     .row.empty-state

spec/features/projects/issues/design_management/user_links_to_designs_in_issue_spec.rb

@@ -27,6 +27,10 @@ RSpec.describe 'viewing issues with design references' do
     MD
   end
 
+  before do
+    stub_feature_flags(design_management_moved: false)
+  end
+
   def visit_page_with_design_references
     public_issue = create(:issue, project: public_project, description: description)
     visit project_issue_path(public_issue.project, public_issue)

spec/features/projects/issues/design_management/user_paginates_designs_spec.rb

@@ -10,6 +10,7 @@ RSpec.describe 'User paginates issue designs', :js do
 
   before do
     enable_design_management
+    stub_feature_flags(design_management_moved: false)
 
     create_list(:design, 2, :with_file, issue: issue)
 

spec/features/projects/issues/design_management/user_permissions_upload_spec.rb

@@ -10,6 +10,7 @@ RSpec.describe 'User design permissions', :js do
 
   before do
     enable_design_management
+    stub_feature_flags(design_management_moved: false)
 
     visit project_issue_path(project, issue)
 

spec/features/projects/issues/design_management/user_uploads_designs_spec.rb

@@ -16,6 +16,7 @@ RSpec.describe 'User uploads new design', :js do
   context "when the feature is available" do
     before do
       enable_design_management
+      stub_feature_flags(design_management_moved: false)
 
       visit project_issue_path(project, issue)
 

spec/features/projects/issues/design_management/user_views_design_images_spec.rb

@@ -13,6 +13,7 @@ RSpec.describe 'Users views raw design image files' do
 
   before do
     enable_design_management
+    stub_feature_flags(design_management_moved: false)
   end
 
   it 'serves the latest design version when no ref is given' do

spec/features/projects/issues/design_management/user_views_design_spec.rb

@@ -11,6 +11,7 @@ RSpec.describe 'User views issue designs', :js do
 
   before do
     enable_design_management
+    stub_feature_flags(design_management_moved: false)
 
     visit project_issue_path(project, issue)
 

spec/features/projects/issues/design_management/user_views_designs_spec.rb

@@ -11,6 +11,7 @@ RSpec.describe 'User views issue designs', :js do
 
   before do
     enable_design_management
+    stub_feature_flags(design_management_moved: false)
   end
 
   context 'navigates from the issue view' do

spec/features/projects/issues/design_management/user_views_designs_with_svg_xss_spec.rb

@@ -12,6 +12,7 @@ RSpec.describe 'User views an SVG design that contains XSS', :js do
 
   before do
     enable_design_management
+    stub_feature_flags(design_management_moved: false)
 
     visit designs_project_issue_path(
       project,

spec/frontend/design_management_new/components/__snapshots__/design_note_pin_spec.js.snap

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Design note pin component should match the snapshot of note when repositioning 1`] = `
+<button
+  aria-label="Comment form position"
+  class="design-pin gl-absolute gl-display-flex gl-align-items-center gl-justify-content-center btn-transparent comment-indicator"
+  style="left: 10px; top: 10px; cursor: move;"
+  type="button"
+>
+  <icon-stub
+    name="image-comment-dark"
+    size="16"
+  />
+</button>
+`;
+
+exports[`Design note pin component should match the snapshot of note with index 1`] = `
+<button
+  aria-label="Comment '1' position"
+  class="design-pin gl-absolute gl-display-flex gl-align-items-center gl-justify-content-center js-image-badge badge badge-pill"
+  style="left: 10px; top: 10px;"
+  type="button"
+>
+  
+    1
+  
+</button>
+`;
+
+exports[`Design note pin component should match the snapshot of note without index 1`] = `
+<button
+  aria-label="Comment form position"
+  class="design-pin gl-absolute gl-display-flex gl-align-items-center gl-justify-content-center btn-transparent comment-indicator"
+  style="left: 10px; top: 10px;"
+  type="button"
+>
+  <icon-stub
+    name="image-comment-dark"
+    size="16"
+  />
+</button>
+`;

spec/frontend/design_management_new/components/__snapshots__/design_presentation_spec.js.snap

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Design management design presentation component currentCommentForm is equal to current annotation position when isAnnotating is true 1`] = `
+<div
+  class="h-100 w-100 p-3 overflow-auto position-relative"
+>
+  <div
+    class="h-100 w-100 d-flex align-items-center position-relative"
+  >
+    <design-image-stub
+      image="test.jpg"
+      name="test"
+      scale="1"
+    />
+     
+    <design-overlay-stub
+      currentcommentform="[object Object]"
+      dimensions="[object Object]"
+      notes=""
+      position="[object Object]"
+    />
+  </div>
+</div>
+`;
+
+exports[`Design management design presentation component currentCommentForm is null when isAnnotating is false 1`] = `
+<div
+  class="h-100 w-100 p-3 overflow-auto position-relative"
+>
+  <div
+    class="h-100 w-100 d-flex align-items-center position-relative"
+  >
+    <design-image-stub
+      image="test.jpg"
+      name="test"
+      scale="1"
+    />
+     
+    <design-overlay-stub
+      dimensions="[object Object]"
+      notes=""
+      position="[object Object]"
+    />
+  </div>
+</div>
+`;
+
+exports[`Design management design presentation component currentCommentForm is null when isAnnotating is true but annotation position is falsey 1`] = `
+<div
+  class="h-100 w-100 p-3 overflow-auto position-relative"
+>
+  <div
+    class="h-100 w-100 d-flex align-items-center position-relative"
+  >
+    <design-image-stub
+      image="test.jpg"
+      name="test"
+      scale="1"
+    />
+     
+    <design-overlay-stub
+      dimensions="[object Object]"
+      notes=""
+      position="[object Object]"
+    />
+  </div>
+</div>
+`;
+
+exports[`Design management design presentation component renders empty state when no image provided 1`] = `
+<div
+  class="h-100 w-100 p-3 overflow-auto position-relative"
+>
+  <div
+    class="h-100 w-100 d-flex align-items-center position-relative"
+  >
+    <!---->
+     
+    <!---->
+  </div>
+</div>
+`;
+
+exports[`Design management design presentation component renders image and overlay when image provided 1`] = `
+<div
+  class="h-100 w-100 p-3 overflow-auto position-relative"
+>
+  <div
+    class="h-100 w-100 d-flex align-items-center position-relative"
+  >
+    <design-image-stub
+      image="test.jpg"
+      name="test"
+      scale="1"
+    />
+     
+    <design-overlay-stub
+      dimensions="[object Object]"
+      notes=""
+      position="[object Object]"
+    />
+  </div>
+</div>
+`;

spec/frontend/design_management_new/components/__snapshots__/design_scaler_spec.js.snap

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Design management design scaler component minus and reset buttons are disabled when scale === 1 1`] = `
+<div
+  class="design-scaler btn-group"
+  role="group"
+>
+  <button
+    class="btn"
+    disabled="disabled"
+  >
+    <span
+      class="d-flex-center gl-icon s16"
+    >
+      
+      –
+    
+    </span>
+  </button>
+   
+  <button
+    class="btn"
+    disabled="disabled"
+  >
+    <gl-icon-stub
+      name="redo"
+      size="16"
+    />
+  </button>
+   
+  <button
+    class="btn"
+  >
+    <gl-icon-stub
+      name="plus"
+      size="16"
+    />
+  </button>
+</div>
+`;
+
+exports[`Design management design scaler component minus and reset buttons are enabled when scale > 1 1`] = `
+<div
+  class="design-scaler btn-group"
+  role="group"
+>
+  <button
+    class="btn"
+  >
+    <span
+      class="d-flex-center gl-icon s16"
+    >
+      
+      –
+    
+    </span>
+  </button>
+   
+  <button
+    class="btn"
+  >
+    <gl-icon-stub
+      name="redo"
+      size="16"
+    />
+  </button>
+   
+  <button
+    class="btn"
+  >
+    <gl-icon-stub
+      name="plus"
+      size="16"
+    />
+  </button>
+</div>
+`;
+
+exports[`Design management design scaler component plus button is disabled when scale === 2 1`] = `
+<div
+  class="design-scaler btn-group"
+  role="group"
+>
+  <button
+    class="btn"
+  >
+    <span
+      class="d-flex-center gl-icon s16"
+    >
+      
+      –
+    
+    </span>
+  </button>
+   
+  <button
+    class="btn"
+  >
+    <gl-icon-stub
+      name="redo"
+      size="16"
+    />
+  </button>
+   
+  <button
+    class="btn"
+    disabled="disabled"
+  >
+    <gl-icon-stub
+      name="plus"
+      size="16"
+    />
+  </button>
+</div>
+`;

spec/frontend/design_management_new/components/__snapshots__/image_spec.js.snap

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Design management large image component renders image 1`] = `
+<div
+  class="m-auto js-design-image"
+>
+  <!---->
+   
+  <img
+    alt="test"
+    class="mh-100 img-fluid"
+    src="test.jpg"
+  />
+</div>
+`;
+
+exports[`Design management large image component renders loading state 1`] = `
+<div
+  class="m-auto js-design-image"
+  isloading="true"
+>
+  <!---->
+   
+  <img
+    alt=""
+    class="mh-100 img-fluid"
+    src=""
+  />
+</div>
+`;
+
+exports[`Design management large image component renders media broken icon on error 1`] = `
+<gl-icon-stub
+  class="text-secondary-100"
+  name="media-broken"
+  size="48"
+/>
+`;
+
+exports[`Design management large image component sets correct classes and styles if imageStyle is set 1`] = `
+<div
+  class="m-auto js-design-image"
+>
+  <!---->
+   
+  <img
+    alt="test"
+    class="mh-100"
+    src="test.jpg"
+    style="width: 100px; height: 100px;"
+  />
+</div>
+`;
+
+exports[`Design management large image component zoom sets image style when zoomed 1`] = `
+<div
+  class="m-auto js-design-image"
+>
+  <!---->
+   
+  <img
+    alt="test"
+    class="mh-100"
+    src="test.jpg"
+    style="width: 200px; height: 200px;"
+  />
+</div>
+`;

spec/frontend/design_management_new/components/delete_button_spec.js

+import { shallowMount } from '@vue/test-utils';
+import { GlDeprecatedButton, GlModal, GlModalDirective } from '@gitlab/ui';
+import BatchDeleteButton from '~/design_management_new/components/delete_button.vue';
+
+describe('Batch delete button component', () => {
+  let wrapper;
+
+  const findButton = () => wrapper.find(GlDeprecatedButton);
+  const findModal = () => wrapper.find(GlModal);
+
+  function createComponent(isDeleting = false) {
+    wrapper = shallowMount(BatchDeleteButton, {
+      propsData: {
+        isDeleting,
+      },
+      directives: {
+        GlModalDirective,
+      },
+    });
+  }
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  it('renders non-disabled button by default', () => {
+    createComponent();
+
+    expect(findButton().exists()).toBe(true);
+    expect(findButton().attributes('disabled')).toBeFalsy();
+  });
+
+  it('renders disabled button when design is deleting', () => {
+    createComponent(true);
+    expect(findButton().attributes('disabled')).toBeTruthy();
+  });
+
+  it('emits `deleteSelectedDesigns` event on modal ok click', () => {
+    createComponent();
+    findButton().vm.$emit('click');
+    return wrapper.vm
+      .$nextTick()
+      .then(() => {
+        findModal().vm.$emit('ok');
+        return wrapper.vm.$nextTick();
+      })
+      .then(() => {
+        expect(wrapper.emitted().deleteSelectedDesigns).toBeTruthy();
+      });
+  });
+});

spec/frontend/design_management_new/components/design_note_pin_spec.js

+import { shallowMount } from '@vue/test-utils';
+import DesignNotePin from '~/design_management_new/components/design_note_pin.vue';
+
+describe('Design note pin component', () => {
+  let wrapper;
+
+  function createComponent(propsData = {}) {
+    wrapper = shallowMount(DesignNotePin, {
+      propsData: {
+        position: {
+          left: '10px',
+          top: '10px',
+        },
+        ...propsData,
+      },
+    });
+  }
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  it('should match the snapshot of note without index', () => {
+    createComponent();
+    expect(wrapper.element).toMatchSnapshot();
+  });
+
+  it('should match the snapshot of note with index', () => {
+    createComponent({ label: 1 });
+    expect(wrapper.element).toMatchSnapshot();
+  });
+
+  it('should match the snapshot of note when repositioning', () => {
+    createComponent({ repositioning: true });
+    expect(wrapper.element).toMatchSnapshot();
+  });
+
+  describe('pinStyle', () => {
+    it('sets cursor to `move` when repositioning = true', () => {
+      createComponent({ repositioning: true });
+      expect(wrapper.vm.pinStyle.cursor).toBe('move');
+    });
+
+    it('does not set cursor when repositioning = false', () => {
+      createComponent();
+      expect(wrapper.vm.pinStyle.cursor).toBe(undefined);
+    });
+  });
+});

spec/frontend/design_management_new/components/design_notes/__snapshots__/design_note_spec.js.snap

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Design note component should match the snapshot 1`] = `
+<timeline-entry-item-stub
+  class="design-note note-form"
+  id="note_123"
+>
+  <user-avatar-link-stub
+    imgalt=""
+    imgcssclasses=""
+    imgsize="40"
+    imgsrc=""
+    linkhref=""
+    tooltipplacement="top"
+    tooltiptext=""
+    username=""
+  />
+   
+  <div
+    class="d-flex justify-content-between"
+  >
+    <div>
+      <a
+        class="js-user-link"
+        data-user-id="author-id"
+      >
+        <span
+          class="note-header-author-name bold"
+        >
+          
+        </span>
+         
+        <!---->
+         
+        <span
+          class="note-headline-light"
+        >
+          @
+        </span>
+      </a>
+       
+      <span
+        class="note-headline-light note-headline-meta"
+      >
+        <span
+          class="system-note-message"
+        />
+         
+        <!---->
+      </span>
+    </div>
+     
+    <div
+      class="gl-display-flex"
+    >
+       
+      <!---->
+    </div>
+  </div>
+   
+  <div
+    class="note-text js-note-text md"
+    data-qa-selector="note_content"
+  />
+   
+</timeline-entry-item-stub>
+`;

spec/frontend/design_management_new/components/design_notes/__snapshots__/design_reply_form_spec.js.snap

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Design reply form component renders button text as "Comment" when creating a comment 1`] = `
+"<button data-track-event=\\"click_button\\" data-qa-selector=\\"save_comment_button\\" type=\\"submit\\" disabled=\\"disabled\\" class=\\"btn btn-success btn-md disabled\\">
+  <!---->
+  Comment
+</button>"
+`;
+
+exports[`Design reply form component renders button text as "Save comment" when creating a comment 1`] = `
+"<button data-track-event=\\"click_button\\" data-qa-selector=\\"save_comment_button\\" type=\\"submit\\" disabled=\\"disabled\\" class=\\"btn btn-success btn-md disabled\\">
+  <!---->
+  Save comment
+</button>"
+`;

spec/frontend/design_management_new/components/toolbar/__snapshots__/pagination_button_spec.js.snap

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Design management pagination button component disables button when no design is passed 1`] = `
+<router-link-stub
+  aria-label="Test title"
+  class="btn btn-default disabled"
+  disabled="true"
+  to="[object Object]"
+>
+  <icon-stub
+    name="angle-right"
+    size="16"
+  />
+</router-link-stub>
+`;
+
+exports[`Design management pagination button component renders router-link 1`] = `
+<router-link-stub
+  aria-label="Test title"
+  class="btn btn-default"
+  to="[object Object]"
+>
+  <icon-stub
+    name="angle-right"
+    size="16"
+  />
+</router-link-stub>
+`;

spec/frontend/design_management_new/components/toolbar/__snapshots__/pagination_spec.js.snap

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Design management pagination component hides components when designs are empty 1`] = `<!---->`;
+
+exports[`Design management pagination component renders pagination buttons 1`] = `
+<div
+  class="d-flex align-items-center"
+>
+  
+  0 of 2
+  
+  <div
+    class="btn-group ml-3 mr-3"
+  >
+    <pagination-button-stub
+      class="js-previous-design"
+      iconname="angle-left"
+      title="Go to previous design"
+    />
+     
+    <pagination-button-stub
+      class="js-next-design"
+      design="[object Object]"
+      iconname="angle-right"
+      title="Go to next design"
+    />
+  </div>
+</div>
+`;