Remove duplicated code

app/assets/javascripts/filtered_search/dropdown_hint.js

@@ -53,20 +53,13 @@ class DropdownHint extends gl.FilteredSearchDropdown {
   }
 
   renderContent() {
-    const dropdownData = [];
-
-    [].forEach.call(this.input.closest('.filtered-search-box-input-container').querySelectorAll('.dropdown-menu'), (dropdownMenu) => {
-      const { icon, hint, tag, type } = dropdownMenu.dataset;
-      if (icon && hint && tag) {
-        dropdownData.push(
-          Object.assign({
-            icon: `fa-${icon}`,
-            hint,
-            tag: `<${tag}>`,
-          }, type && { type }),
-        );
-      }
-    });
+    const dropdownData = gl.FilteredSearchTokenKeys.get()
+      .map(tokenKey => ({
+        icon: `fa-${tokenKey.icon}`,
+        hint: tokenKey.key,
+        tag: `<${tokenKey.symbol}${tokenKey.key}>`,
+        type: tokenKey.type,
+      }));
 
     this.droplab.changeHookList(this.hookId, this.dropdown, [Filter], this.config);
     this.droplab.setData(this.hookId, dropdownData);

app/assets/javascripts/filtered_search/filtered_search_token_keys.js

@@ -3,21 +3,25 @@ const tokenKeys = [{
   type: 'string',
   param: 'username',
   symbol: '@',
+  icon: 'pencil',
 }, {
   key: 'assignee',
   type: 'string',
   param: 'username',
   symbol: '@',
+  icon: 'user',
 }, {
   key: 'milestone',
   type: 'string',
   param: 'title',
   symbol: '%',
+  icon: 'clock-o',
 }, {
   key: 'label',
   type: 'array',
   param: 'name[]',
   symbol: '~',
+  icon: 'tag',
 }];
 
 const alternativeTokenKeys = [{

app/views/shared/issuable/_search_bar.html.haml

@@ -45,7 +45,7 @@
                       {{hint}}
                     %span.js-filter-tag.dropdown-light-content
                       {{tag}}
-            #js-dropdown-author.filtered-search-input-dropdown-menu.dropdown-menu{ data: { icon: 'pencil', hint: 'author', tag: '@author' } }
+            #js-dropdown-author.filtered-search-input-dropdown-menu.dropdown-menu
               %ul.filter-dropdown{ data: { dynamic: true, dropdown: true } }
                 %li.filter-dropdown-item
                   %button.btn.btn-link.dropdown-user
@@ -55,7 +55,7 @@
                         {{name}}
                       %span.dropdown-light-content
                         @{{username}}
-            #js-dropdown-assignee.filtered-search-input-dropdown-menu.dropdown-menu{ data: { icon: 'user', hint: 'assignee', tag: '@assignee' } }
+            #js-dropdown-assignee.filtered-search-input-dropdown-menu.dropdown-menu
               %ul{ data: { dropdown: true } }
                 %li.filter-dropdown-item{ data: { value: 'none' } }
                   %button.btn.btn-link
@@ -70,7 +70,7 @@
                         {{name}}
                       %span.dropdown-light-content
                         @{{username}}
-            #js-dropdown-milestone.filtered-search-input-dropdown-menu.dropdown-menu{ data: { icon: 'clock-o', hint: 'milestone', tag: '%milestone' } }
+            #js-dropdown-milestone.filtered-search-input-dropdown-menu.dropdown-menu
               %ul{ data: { dropdown: true } }
                 %li.filter-dropdown-item{ data: { value: 'none' } }
                   %button.btn.btn-link
@@ -86,7 +86,7 @@
                 %li.filter-dropdown-item
                   %button.btn.btn-link.js-data-value
                     {{title}}
-            #js-dropdown-label.filtered-search-input-dropdown-menu.dropdown-menu{ data: { icon: 'tag', hint: 'label', tag: '~label', type: 'array' } }
+            #js-dropdown-label.filtered-search-input-dropdown-menu.dropdown-menu
               %ul{ data: { dropdown: true } }
                 %li.filter-dropdown-item{ data: { value: 'none' } }
                   %button.btn.btn-link