Split gl_dropdown prototypes into multiple files

In this MR we simply split the gl_dropdown into multiple files.

app/assets/javascripts/deprecated_jquery_dropdown/gl_dropdown_filter.js

+/* eslint-disable consistent-return */
+
+import $ from 'jquery';
+import fuzzaldrinPlus from 'fuzzaldrin-plus';
+import { isObject } from '~/lib/utils/type_utility';
+
+const BLUR_KEYCODES = [27, 40];
+
+const HAS_VALUE_CLASS = 'has-value';
+
+export class GitLabDropdownFilter {
+  constructor(input, options) {
+    let ref;
+    let timeout;
+    this.input = input;
+    this.options = options;
+    // eslint-disable-next-line no-cond-assign
+    this.filterInputBlur = (ref = this.options.filterInputBlur) != null ? ref : true;
+    const $inputContainer = this.input.parent();
+    const $clearButton = $inputContainer.find('.js-dropdown-input-clear');
+    $clearButton.on('click', e => {
+      // Clear click
+      e.preventDefault();
+      e.stopPropagation();
+      return this.input
+        .val('')
+        .trigger('input')
+        .focus();
+    });
+    // Key events
+    timeout = '';
+    this.input
+      .on('keydown', e => {
+        const keyCode = e.which;
+        if (keyCode === 13 && !options.elIsInput) {
+          e.preventDefault();
+        }
+      })
+      .on('input', () => {
+        if (this.input.val() !== '' && !$inputContainer.hasClass(HAS_VALUE_CLASS)) {
+          $inputContainer.addClass(HAS_VALUE_CLASS);
+        } else if (this.input.val() === '' && $inputContainer.hasClass(HAS_VALUE_CLASS)) {
+          $inputContainer.removeClass(HAS_VALUE_CLASS);
+        }
+        // Only filter asynchronously only if option remote is set
+        if (this.options.remote) {
+          clearTimeout(timeout);
+          // eslint-disable-next-line no-return-assign
+          return (timeout = setTimeout(() => {
+            $inputContainer.parent().addClass('is-loading');
+
+            return this.options.query(this.input.val(), data => {
+              $inputContainer.parent().removeClass('is-loading');
+              return this.options.callback(data);
+            });
+          }, 250));
+        }
+        return this.filter(this.input.val());
+      });
+  }
+
+  static shouldBlur(keyCode) {
+    return BLUR_KEYCODES.indexOf(keyCode) !== -1;
+  }
+
+  filter(searchText) {
+    let group;
+    let results;
+    let tmp;
+    if (this.options.onFilter) {
+      this.options.onFilter(searchText);
+    }
+    const data = this.options.data();
+    if (data != null && !this.options.filterByText) {
+      results = data;
+      if (searchText !== '') {
+        // When data is an array of objects therefore [object Array] e.g.
+        // [
+        //   { prop: 'foo' },
+        //   { prop: 'baz' }
+        // ]
+        if (Array.isArray(data)) {
+          results = fuzzaldrinPlus.filter(data, searchText, {
+            key: this.options.keys,
+          });
+        }
+        // If data is grouped therefore an [object Object]. e.g.
+        // {
+        //   groupName1: [
+        //     { prop: 'foo' },
+        //     { prop: 'baz' }
+        //   ],
+        //   groupName2: [
+        //     { prop: 'abc' },
+        //     { prop: 'def' }
+        //   ]
+        // }
+        else if (isObject(data)) {
+          results = {};
+          Object.keys(data).forEach(key => {
+            group = data[key];
+            tmp = fuzzaldrinPlus.filter(group, searchText, {
+              key: this.options.keys,
+            });
+            if (tmp.length) {
+              results[key] = tmp.map(item => item);
+            }
+          });
+        }
+      }
+      return this.options.callback(results);
+    }
+    const elements = this.options.elements();
+    if (searchText) {
+      // eslint-disable-next-line func-names
+      elements.each(function() {
+        const $el = $(this);
+        const matches = fuzzaldrinPlus.match($el.text().trim(), searchText);
+        if (!$el.is('.dropdown-header')) {
+          if (matches.length) {
+            return $el.show().removeClass('option-hidden');
+          }
+          return $el.hide().addClass('option-hidden');
+        }
+      });
+    } else {
+      elements.show().removeClass('option-hidden');
+    }
+
+    elements
+      .parent()
+      .find('.dropdown-menu-empty-item')
+      .toggleClass('hidden', elements.is(':visible'));
+  }
+}

app/assets/javascripts/deprecated_jquery_dropdown/gl_dropdown_input.js

+export class GitLabDropdownInput {
+  constructor(input, options) {
+    this.input = input;
+    this.options = options;
+    this.fieldName = this.options.fieldName || 'field-name';
+    const $inputContainer = this.input.parent();
+    const $clearButton = $inputContainer.find('.js-dropdown-input-clear');
+    $clearButton.on('click', e => {
+      // Clear click
+      e.preventDefault();
+      e.stopPropagation();
+      return this.input
+        .val('')
+        .trigger('input')
+        .focus();
+    });
+
+    this.input
+      .on('keydown', e => {
+        const keyCode = e.which;
+        if (keyCode === 13 && !options.elIsInput) {
+          e.preventDefault();
+        }
+      })
+      .on('input', e => {
+        let val = e.currentTarget.value || this.options.inputFieldName;
+        val = val
+          .split(' ')
+          .join('-') // replaces space with dash
+          .replace(/[^a-zA-Z0-9 -]/g, '')
+          .toLowerCase() // replace non alphanumeric
+          .replace(/(-)\1+/g, '-'); // replace repeated dashes
+        this.cb(this.options.fieldName, val, {}, true);
+        this.input
+          .closest('.dropdown')
+          .find('.dropdown-toggle-text')
+          .text(val);
+      });
+  }
+
+  onInput(cb) {
+    this.cb = cb;
+  }
+}

app/assets/javascripts/deprecated_jquery_dropdown/gl_dropdown_remote.js

+/* eslint-disable consistent-return */
+
+import axios from '../lib/utils/axios_utils';
+
+export class GitLabDropdownRemote {
+  constructor(dataEndpoint, options) {
+    this.dataEndpoint = dataEndpoint;
+    this.options = options;
+  }
+
+  execute() {
+    if (typeof this.dataEndpoint === 'string') {
+      return this.fetchData();
+    } else if (typeof this.dataEndpoint === 'function') {
+      if (this.options.beforeSend) {
+        this.options.beforeSend();
+      }
+      return this.dataEndpoint('', data => {
+        // Fetch the data by calling the data function
+        if (this.options.success) {
+          this.options.success(data);
+        }
+        if (this.options.beforeSend) {
+          return this.options.beforeSend();
+        }
+      });
+    }
+  }
+
+  fetchData() {
+    if (this.options.beforeSend) {
+      this.options.beforeSend();
+    }
+
+    // Fetch the data through ajax if the data is a string
+    return axios.get(this.dataEndpoint).then(({ data }) => {
+      if (this.options.success) {
+        return this.options.success(data);
+      }
+    });
+  }
+}