inherit DropdownUser from DropdownAjaxFilter

app/assets/javascripts/filtered_search/dropdown_user.js

-import Flash from '../flash';
-import AjaxFilter from '../droplab/plugins/ajax_filter';
-import FilteredSearchDropdown from './filtered_search_dropdown';
 import { addClassIfElementExists } from '../lib/utils/dom_utils';
-import DropdownUtils from './dropdown_utils';
-import FilteredSearchTokenizer from './filtered_search_tokenizer';
+import DropdownAjaxFilter from './dropdown_ajax_filter';
 
-export default class DropdownUser extends FilteredSearchDropdown {
+export default class DropdownUser extends DropdownAjaxFilter {
   constructor(options = {}) {
-    const { tokenKeys } = options;
-    super(options);
-    this.config = {
-      AjaxFilter: {
-        endpoint: `${gon.relative_url_root || ''}/autocomplete/users.json`,
-        searchKey: 'search',
+    super({
+      ...options,
+      endpoint: '/autocomplete/users.json',
+      symbol: '@',
+    });
+  }
+
+  ajaxFilterConfig() {
+    return {
+      ...super.ajaxFilterConfig(),
       params: {
         active: true,
         group_id: this.getGroupId(),
         project_id: this.getProjectId(),
         current_user: true,
       },
-        searchValueFunction: this.getSearchInput.bind(this),
-        loadingTemplate: this.loadingTemplate,
       onLoadingFinished: () => {
         this.hideCurrentUser();
       },
-        onError() {
-          /* eslint-disable no-new */
-          new Flash('An error occurred fetching the dropdown data.');
-          /* eslint-enable no-new */
-        },
-      },
     };
-    this.tokenKeys = tokenKeys;
   }
 
   hideCurrentUser() {
     addClassIfElementExists(this.dropdown.querySelector('.js-current-user'), 'hidden');
   }
 
-  itemClicked(e) {
-    super.itemClicked(e, selected =>
-      selected.querySelector('.dropdown-light-content').innerText.trim(),
-    );
-  }
-
-  renderContent(forceShowList = false) {
-    this.droplab.changeHookList(this.hookId, this.dropdown, [AjaxFilter], this.config);
-    super.renderContent(forceShowList);
-  }
-
   getGroupId() {
     return this.input.getAttribute('data-group-id');
   }
@@ -56,27 +36,4 @@ export default class DropdownUser extends FilteredSearchDropdown {
   getProjectId() {
     return this.input.getAttribute('data-project-id');
   }
-
-  getSearchInput() {
-    const query = DropdownUtils.getSearchInput(this.input);
-    const { lastToken } = FilteredSearchTokenizer.processTokens(query, this.tokenKeys.get());
-
-    let value = lastToken || '';
-
-    if (value[0] === '@') {
-      value = value.slice(1);
-    }
-
-    // Removes the first character if it is a quotation so that we can search
-    // with multiple words
-    if (value[0] === '"' || value[0] === "'") {
-      value = value.slice(1);
-    }
-
-    return value;
-  }
-
-  init() {
-    this.droplab.addHook(this.input, this.dropdown, [AjaxFilter], this.config).init();
-  }
 }