Create new branch from dropdown.

app/assets/javascripts/repo/components/new_branch_form.vue

+<script>
+  import flash, { hideFlash } from '../../flash';
+  import loadingIcon from '../../vue_shared/components/loading_icon.vue';
+  import eventHub from '../event_hub';
+
+  export default {
+    components: {
+      loadingIcon,
+    },
+    props: {
+      currentBranch: {
+        type: String,
+        required: true,
+      },
+    },
+    data() {
+      return {
+        branchName: '',
+        loading: false,
+      };
+    },
+    computed: {
+      btnDisabled() {
+        return this.loading || this.branchName === '';
+      },
+    },
+    methods: {
+      toggleDropdown() {
+        this.$dropdown.dropdown('toggle');
+      },
+      submitNewBranch() {
+        // need to query as the element is appended outside of Vue
+        const flashEl = this.$refs.flashContainer.querySelector('.flash-alert');
+
+        this.loading = true;
+
+        if (flashEl) {
+          hideFlash(flashEl, false);
+        }
+
+        eventHub.$emit('createNewBranch', this.branchName);
+      },
+      showErrorMessage(message) {
+        this.loading = false;
+        flash(message, 'alert', this.$el);
+      },
+      createdNewBranch(newBranchName) {
+        this.loading = false;
+        this.branchName = '';
+
+        if (this.dropdownText) {
+          this.dropdownText.textContent = newBranchName;
+        }
+      },
+    },
+    created() {
+      // Dropdown is outside of Vue instance & is controlled by Bootstrap
+      this.$dropdown = $('.git-revision-dropdown');
+
+      // text element is outside Vue app
+      this.dropdownText = document.querySelector('.project-refs-form .dropdown-toggle-text');
+
+      eventHub.$on('createNewBranchSuccess', this.createdNewBranch);
+      eventHub.$on('createNewBranchError', this.showErrorMessage);
+      eventHub.$on('toggleNewBranchDropdown', this.toggleDropdown);
+    },
+    destroyed() {
+      eventHub.$off('createNewBranchSuccess', this.createdNewBranch);
+      eventHub.$off('toggleNewBranchDropdown', this.toggleDropdown);
+      eventHub.$off('createNewBranchError', this.showErrorMessage);
+    },
+  };
+</script>
+
+<template>
+  <div>
+    <div
+      class="flash-container"
+      ref="flashContainer"
+    >
+    </div>
+    <p>
+      Create from:
+      <code>{{ currentBranch }}</code>
+    </p>
+    <input
+      class="form-control js-new-branch-name"
+      type="text"
+      placeholder="Name new branch"
+      v-model="branchName"
+      @keyup.enter.stop.prevent="submitNewBranch"
+    />
+    <div class="prepend-top-default clearfix">
+      <button
+        type="button"
+        class="btn btn-primary pull-left"
+        :disabled="btnDisabled"
+        @click.stop.prevent="submitNewBranch"
+      >
+        <loading-icon
+          v-if="loading"
+          :inline="true"
+        />
+        <span>Create</span>
+      </button>
+      <button
+        type="button"
+        class="btn btn-default pull-right"
+        @click.stop.prevent="toggleDropdown"
+      >
+        Cancel
+      </button>
+    </div>
+  </div>
+</template>

app/assets/javascripts/repo/components/repo.vue

@@ -8,7 +8,9 @@ import RepoMixin from '../mixins/repo_mixin';
 import PopupDialog from '../../vue_shared/components/popup_dialog.vue';
 import Store from '../stores/repo_store';
 import Helper from '../helpers/repo_helper';
+import Service from '../services/repo_service';
 import MonacoLoaderHelper from '../helpers/monaco_loader_helper';
+import eventHub from '../event_hub';
 
 export default {
   data() {
@@ -24,12 +26,19 @@ export default {
     PopupDialog,
     RepoPreview,
   },
-
+  created() {
+    eventHub.$on('createNewBranch', this.createNewBranch);
+  },
   mounted() {
     Helper.getContent().catch(Helper.loadingError);
   },
-
+  destroyed() {
+    eventHub.$off('createNewBranch', this.createNewBranch);
+  },
   methods: {
+    getCurrentLocation() {
+      return location.href;
+    },
     toggleDialogOpen(toggle) {
       this.dialog.open = toggle;
     },
@@ -38,8 +47,25 @@ export default {
       this.toggleDialogOpen(false);
       this.dialog.status = status;
     },
-
     toggleBlobView: Store.toggleBlobView,
+    createNewBranch(branch) {
+      Service.createBranch({
+        branch,
+        ref: Store.currentBranch,
+      }).then((res) => {
+        const newBranchName = res.data.name;
+        const newUrl = this.getCurrentLocation().replace(Store.currentBranch, newBranchName);
+
+        Store.currentBranch = newBranchName;
+
+        history.pushState({ key: Helper.key }, '', newUrl);
+
+        eventHub.$emit('createNewBranchSuccess', newBranchName);
+        eventHub.$emit('toggleNewBranchDropdown');
+      }).catch((err) => {
+        eventHub.$emit('createNewBranchError', err.response.data.message);
+      });
+    },
   },
 };
 </script>

app/assets/javascripts/repo/index.js

@@ -5,6 +5,7 @@ import Service from './services/repo_service';
 import Store from './stores/repo_store';
 import Repo from './components/repo.vue';
 import RepoEditButton from './components/repo_edit_button.vue';
+import newBranchForm from './components/new_branch_form.vue';
 import Translate from '../vue_shared/translate';
 
 function initDropdowns() {
@@ -62,6 +63,26 @@ function initRepoEditButton(el) {
   });
 }
 
+function initNewBranchForm() {
+  const el = document.querySelector('.js-new-branch-dropdown');
+
+  if (!el) return null;
+
+  return new Vue({
+    el,
+    components: {
+      newBranchForm,
+    },
+    render(createElement) {
+      return createElement('new-branch-form', {
+        props: {
+          currentBranch: Store.currentBranch,
+        },
+      });
+    },
+  });
+}
+
 function initRepoBundle() {
   const repo = document.getElementById('repo');
   const editButton = document.querySelector('.editable-mode');
@@ -73,6 +94,7 @@ function initRepoBundle() {
 
   initRepo(repo);
   initRepoEditButton(editButton);
+  initNewBranchForm();
 }
 
 $(initRepoBundle);

app/assets/javascripts/repo/services/repo_service.js

 import axios from 'axios';
+import csrf from '../../lib/utils/csrf';
 import Store from '../stores/repo_store';
 import Api from '../../api';
 import Helper from '../helpers/repo_helper';
 
+axios.defaults.headers.common[csrf.headerKey] = csrf.token;
+
 const RepoService = {
   url: '',
   options: {
@@ -10,6 +13,7 @@ const RepoService = {
       format: 'json',
     },
   },
+  createBranchPath: '/api/:version/projects/:id/repository/branches',
   richExtensionRegExp: /md/,
 
   getRaw(url) {
@@ -73,6 +77,12 @@ const RepoService = {
       .then(this.commitFlash);
   },
 
+  createBranch(payload) {
+    const url = Api.buildUrl(this.createBranchPath)
+      .replace(':id', Store.projectId);
+    return axios.post(url, payload);
+  },
+
   commitFlash(data) {
     if (data.short_id && data.stats) {
       window.Flash(`Your changes have been committed. Commit ${data.short_id} with ${data.stats.additions} additions, ${data.stats.deletions} deletions.`, 'notice');

app/assets/javascripts/repo/stores/repo_store.js

@@ -13,6 +13,7 @@ const RepoStore = {
   projectId: '',
   projectName: '',
   projectUrl: '',
+  branchUrl: '',
   blobRaw: '',
   currentBlobView: 'repo-preview',
   openedFiles: [],

app/views/projects/tree/_tree_header.html.haml

 .tree-ref-container
   .tree-ref-holder
-    = render 'shared/ref_switcher', destination: 'tree', path: @path
+    = render 'shared/ref_switcher', destination: 'tree', path: @path, show_create: true
 
   - unless show_new_repo?
     = render 'projects/tree/old_tree_header'

app/views/shared/_ref_switcher.html.haml

+- show_new_branch_form = show_new_repo? && show_create && can?(current_user, :push_code, @project)
 - dropdown_toggle_text = @ref || @project.default_branch
 = form_tag switch_project_refs_path(@project), method: :get, class: "project-refs-form" do
   = hidden_field_tag :destination, destination
@@ -7,8 +8,20 @@
     = hidden_field_tag key, value, id: nil
   .dropdown
     = dropdown_toggle dropdown_toggle_text, { toggle: "dropdown", selected: dropdown_toggle_text, ref: @ref, refs_url: refs_project_path(@project), field_name: 'ref', submit_form_on_click: true, visit: true }, { toggle_class: "js-project-refs-dropdown" }
-    .dropdown-menu.dropdown-menu-selectable.git-revision-dropdown{ class: ("dropdown-menu-align-right" if local_assigns[:align_right]) }
-      = dropdown_title _("Switch branch/tag")
-      = dropdown_filter _("Search branches and tags")
-      = dropdown_content
-      = dropdown_loading
+    .dropdown-menu.dropdown-menu-selectable.git-revision-dropdown.dropdown-menu-paging{ class: ("dropdown-menu-align-right" if local_assigns[:align_right]) }
+      .dropdown-page-one
+        = dropdown_title _("Switch branch/tag")
+        = dropdown_filter _("Search branches and tags")
+        = dropdown_content
+        = dropdown_loading
+        - if show_new_branch_form
+          = dropdown_footer do
+            %ul.dropdown-footer-list
+              %li
+                %a.dropdown-toggle-page{ href: "#" }
+                  Create new branch
+      - if show_new_branch_form
+        .dropdown-page-two
+          = dropdown_title("Create new branch", options: { back: true })
+          = dropdown_content do
+            .js-new-branch-dropdown

spec/features/projects/ref_switcher_spec.rb

@@ -6,6 +6,7 @@ feature 'Ref switcher', :js do
 
   before do
     project.team << [user, :master]
+    page.driver.set_cookie('new_repo', 'true')
     sign_in(user)
     visit project_tree_path(project, 'master')
   end
@@ -40,4 +41,38 @@ feature 'Ref switcher', :js do
 
     expect(page).to have_title "'test'"
   end
+
+  context "create branch" do
+    let(:input) { find('.js-new-branch-name') }
+
+    before do
+      click_button 'master'
+      wait_for_requests
+
+      page.within '.project-refs-form' do
+        find(".dropdown-footer-list a").click
+      end
+    end
+
+    it "shows error message for the invalid branch name" do
+      input.set 'foo bar'
+      click_button('Create')
+      wait_for_requests
+      expect(page).to have_content 'Branch name is invalid'
+    end
+
+    it "should create new branch properly" do
+      input.set 'new-branch-name'
+      click_button('Create')
+      wait_for_requests
+      expect(find('.js-project-refs-dropdown')).to have_content 'new-branch-name'
+    end
+
+    it "should create new branch by Enter key" do
+      input.set 'new-branch-name-2'
+      input.native.send_keys :enter
+      wait_for_requests
+      expect(find('.js-project-refs-dropdown')).to have_content 'new-branch-name-2'
+    end
+  end
 end

spec/javascripts/repo/components/new_branch_form_spec.js

+import Vue from 'vue';
+import newBranchForm from '~/repo/components/new_branch_form.vue';
+import eventHub from '~/repo/event_hub';
+import RepoStore from '~/repo/stores/repo_store';
+import createComponent from '../../helpers/vue_mount_component_helper';
+
+describe('Multi-file editor new branch form', () => {
+  let vm;
+
+  beforeEach(() => {
+    const Component = Vue.extend(newBranchForm);
+
+    RepoStore.currentBranch = 'master';
+
+    vm = createComponent(Component, {
+      currentBranch: RepoStore.currentBranch,
+    });
+  });
+
+  afterEach(() => {
+    vm.$destroy();
+
+    RepoStore.currentBranch = '';
+  });
+
+  describe('template', () => {
+    it('renders submit as disabled', () => {
+      expect(vm.$el.querySelector('.btn').getAttribute('disabled')).toBe('disabled');
+    });
+
+    it('enables the submit button when branch is not empty', (done) => {
+      vm.branchName = 'testing';
+
+      Vue.nextTick(() => {
+        expect(vm.$el.querySelector('.btn').getAttribute('disabled')).toBeNull();
+
+        done();
+      });
+    });
+
+    it('displays current branch creating from', (done) => {
+      Vue.nextTick(() => {
+        expect(vm.$el.querySelector('p').textContent.replace(/\s+/g, ' ').trim()).toBe('Create from: master');
+
+        done();
+      });
+    });
+  });
+
+  describe('submitNewBranch', () => {
+    it('sets to loading', () => {
+      vm.submitNewBranch();
+
+      expect(vm.loading).toBeTruthy();
+    });
+
+    it('hides current flash element', (done) => {
+      vm.$refs.flashContainer.innerHTML = '<div class="flash-alert"></div>';
+
+      vm.submitNewBranch();
+
+      Vue.nextTick(() => {
+        expect(vm.$el.querySelector('.flash-alert')).toBeNull();
+
+        done();
+      });
+    });
+
+    it('emits an event with branchName', () => {
+      spyOn(eventHub, '$emit');
+
+      vm.branchName = 'testing';
+
+      vm.submitNewBranch();
+
+      expect(eventHub.$emit).toHaveBeenCalledWith('createNewBranch', 'testing');
+    });
+  });
+
+  describe('showErrorMessage', () => {
+    it('sets loading to false', () => {
+      vm.loading = true;
+
+      vm.showErrorMessage();
+
+      expect(vm.loading).toBeFalsy();
+    });
+
+    it('creates flash element', () => {
+      vm.showErrorMessage('error message');
+
+      expect(vm.$el.querySelector('.flash-alert')).not.toBeNull();
+      expect(vm.$el.querySelector('.flash-alert').textContent.trim()).toBe('error message');
+    });
+  });
+
+  describe('createdNewBranch', () => {
+    it('set loading to false', () => {
+      vm.loading = true;
+
+      vm.createdNewBranch();
+
+      expect(vm.loading).toBeFalsy();
+    });
+
+    it('resets branch name', () => {
+      vm.branchName = 'testing';
+
+      vm.createdNewBranch();
+
+      expect(vm.branchName).toBe('');
+    });
+
+    it('sets the dropdown toggle text', () => {
+      vm.dropdownText = document.createElement('span');
+
+      vm.createdNewBranch('branch name');
+
+      expect(vm.dropdownText.textContent).toBe('branch name');
+    });
+  });
+});

spec/javascripts/repo/components/repo_spec.js

+import Vue from 'vue';
+import repo from '~/repo/components/repo.vue';
+import RepoStore from '~/repo/stores/repo_store';
+import Service from '~/repo/services/repo_service';
+import eventHub from '~/repo/event_hub';
+import createComponent from '../../helpers/vue_mount_component_helper';
+
+describe('repo component', () => {
+  let vm;
+
+  beforeEach(() => {
+    const Component = Vue.extend(repo);
+
+    RepoStore.currentBranch = 'master';
+
+    vm = createComponent(Component);
+  });
+
+  afterEach(() => {
+    vm.$destroy();
+
+    RepoStore.currentBranch = '';
+  });
+
+  describe('createNewBranch', () => {
+    beforeEach(() => {
+      spyOn(history, 'pushState');
+    });
+
+    describe('success', () => {
+      beforeEach(() => {
+        spyOn(Service, 'createBranch').and.returnValue(Promise.resolve({
+          data: {
+            name: 'test',
+          },
+        }));
+      });
+
+      it('calls createBranch with branchName', () => {
+        eventHub.$emit('createNewBranch', 'test');
+
+        expect(Service.createBranch).toHaveBeenCalledWith({
+          branch: 'test',
+          ref: RepoStore.currentBranch,
+        });
+      });
+
+      it('pushes new history state', (done) => {
+        RepoStore.currentBranch = 'master';
+
+        spyOn(vm, 'getCurrentLocation').and.returnValue('http://test.com/master');
+
+        eventHub.$emit('createNewBranch', 'test');
+
+        setTimeout(() => {
+          expect(history.pushState).toHaveBeenCalledWith(jasmine.anything(), '', 'http://test.com/test');
+          done();
+        });
+      });
+
+      it('updates stores currentBranch', (done) => {
+        eventHub.$emit('createNewBranch', 'test');
+
+        setTimeout(() => {
+          expect(RepoStore.currentBranch).toBe('test');
+
+          done();
+        });
+      });
+    });
+
+    describe('failure', () => {
+      beforeEach(() => {
+        spyOn(Service, 'createBranch').and.returnValue(Promise.reject({
+          response: {
+            data: {
+              message: 'test',
+            },
+          },
+        }));
+      });
+
+      it('emits createNewBranchError event', (done) => {
+        spyOn(eventHub, '$emit').and.callThrough();
+
+        eventHub.$emit('createNewBranch', 'test');
+
+        setTimeout(() => {
+          expect(eventHub.$emit).toHaveBeenCalledWith('createNewBranchError', 'test');
+
+          done();
+        });
+      });
+    });
+  });
+});