Merge branch '27262-issue-recent-searches' into 'master'

Recent search history for issues

Closes #27262

See merge request !10324

13 files changed, 497 insertions, 114 deletions

diff --git a/app/assets/javascripts/filtered_search/components/recent_searches_dropdown_content.js b/app/assets/javascripts/filtered_search/components/recent_searches_dropdown_content.js
new file mode 100644
index 00000000000..9126422b335
--- /dev/null
+++ b/app/assets/javascripts/filtered_search/components/recent_searches_dropdown_content.js
@@ -0,0 +1,87 @@
+import eventHub from '../event_hub';
+
+export default {
+  name: 'RecentSearchesDropdownContent',
+
+  props: {
+    items: {
+      type: Array,
+      required: true,
+    },
+  },
+
+  computed: {
+    processedItems() {
+      return this.items.map((item) => {
+        const { tokens, searchToken }
+          = gl.FilteredSearchTokenizer.processTokens(item);
+
+        const resultantTokens = tokens.map(token => ({
+          prefix: `${token.key}:`,
+          suffix: `${token.symbol}${token.value}`,
+        }));
+
+        return {
+          text: item,
+          tokens: resultantTokens,
+          searchToken,
+        };
+      });
+    },
+    hasItems() {
+      return this.items.length > 0;
+    },
+  },
+
+  methods: {
+    onItemActivated(text) {
+      eventHub.$emit('recentSearchesItemSelected', text);
+    },
+    onRequestClearRecentSearches(e) {
+      // Stop the dropdown from closing
+      e.stopPropagation();
+
+      eventHub.$emit('requestClearRecentSearches');
+    },
+  },
+
+  template: `
+    <div>
+      <ul v-if="hasItems">
+        <li
+          v-for="(item, index) in processedItems"
+          :key="index">
+          <button
+            type="button"
+            class="filtered-search-history-dropdown-item"
+            @click="onItemActivated(item.text)">
+            <span>
+              <span
+                v-for="(token, tokenIndex) in item.tokens"
+                class="filtered-search-history-dropdown-token">
+                <span class="name">{{ token.prefix }}</span><span class="value">{{ token.suffix }}</span>
+              </span>
+            </span>
+            <span class="filtered-search-history-dropdown-search-token">
+              {{ item.searchToken }}
+            </span>
+          </button>
+        </li>
+        <li class="divider"></li>
+        <li>
+          <button
+            type="button"
+            class="filtered-search-history-clear-button"
+            @click="onRequestClearRecentSearches($event)">
+            Clear recent searches
+          </button>
+        </li>
+      </ul>
+      <div
+        v-else
+        class="dropdown-info-note">
+        You don't have any recent searches
+      </div>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/filtered_search/dropdown_hint.js b/app/assets/javascripts/filtered_search/dropdown_hint.js
index 98dcb697af9..64d7153e547 100644
--- a/app/assets/javascripts/filtered_search/dropdown_hint.js
+++ b/app/assets/javascripts/filtered_search/dropdown_hint.js
@@ -56,7 +56,7 @@ require('./filtered_search_dropdown');
     renderContent() {
       const dropdownData = [];
 
-      [].forEach.call(this.input.closest('.filtered-search-input-container').querySelectorAll('.dropdown-menu'), (dropdownMenu) => {
+      [].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(
diff --git a/app/assets/javascripts/filtered_search/dropdown_utils.js b/app/assets/javascripts/filtered_search/dropdown_utils.js
index 432b0c0dfd2..6c5c20447f7 100644
--- a/app/assets/javascripts/filtered_search/dropdown_utils.js
+++ b/app/assets/javascripts/filtered_search/dropdown_utils.js
@@ -129,7 +129,9 @@ import FilteredSearchContainer from './container';
         }
       });
 
-      return values.join(' ');
+      return values
+        .map(value => value.trim())
+        .join(' ');
     }
 
     static getSearchInput(filteredSearchInput) {
diff --git a/app/assets/javascripts/filtered_search/event_hub.js b/app/assets/javascripts/filtered_search/event_hub.js
new file mode 100644
index 00000000000..0948c2e5352
--- /dev/null
+++ b/app/assets/javascripts/filtered_search/event_hub.js
@@ -0,0 +1,3 @@
+import Vue from 'vue';
+
+export default new Vue();
diff --git a/app/assets/javascripts/filtered_search/filtered_search_manager.js b/app/assets/javascripts/filtered_search/filtered_search_manager.js
index 22352950452..2a8a6b81b3f 100644
--- a/app/assets/javascripts/filtered_search/filtered_search_manager.js
+++ b/app/assets/javascripts/filtered_search/filtered_search_manager.js
@@ -1,18 +1,56 @@
+/* global Flash */
+
 import FilteredSearchContainer from './container';
+import RecentSearchesRoot from './recent_searches_root';
+import RecentSearchesStore from './stores/recent_searches_store';
+import RecentSearchesService from './services/recent_searches_service';
+import eventHub from './event_hub';
 
 (() => {
   class FilteredSearchManager {
     constructor(page) {
       this.container = FilteredSearchContainer.container;
       this.filteredSearchInput = this.container.querySelector('.filtered-search');
+      this.filteredSearchInputForm = this.filteredSearchInput.form;
       this.clearSearchButton = this.container.querySelector('.clear-search');
       this.tokensContainer = this.container.querySelector('.tokens-container');
       this.filteredSearchTokenKeys = gl.FilteredSearchTokenKeys;
 
+      this.recentSearchesStore = new RecentSearchesStore();
+      let recentSearchesKey = 'issue-recent-searches';
+      if (page === 'merge_requests') {
+        recentSearchesKey = 'merge-request-recent-searches';
+      }
+      this.recentSearchesService = new RecentSearchesService(recentSearchesKey);
+
+      // Fetch recent searches from localStorage
+      this.fetchingRecentSearchesPromise = this.recentSearchesService.fetch()
+        .catch(() => {
+          // eslint-disable-next-line no-new
+          new Flash('An error occured while parsing recent searches');
+          // Gracefully fail to empty array
+          return [];
+        })
+        .then((searches) => {
+          // Put any searches that may have come in before
+          // we fetched the saved searches ahead of the already saved ones
+          const resultantSearches = this.recentSearchesStore.setRecentSearches(
+            this.recentSearchesStore.state.recentSearches.concat(searches),
+          );
+          this.recentSearchesService.save(resultantSearches);
+        });
+
       if (this.filteredSearchInput) {
         this.tokenizer = gl.FilteredSearchTokenizer;
         this.dropdownManager = new gl.FilteredSearchDropdownManager(this.filteredSearchInput.getAttribute('data-base-endpoint') || '', page);
 
+        this.recentSearchesRoot = new RecentSearchesRoot(
+          this.recentSearchesStore,
+          this.recentSearchesService,
+          document.querySelector('.js-filtered-search-history-dropdown'),
+        );
+        this.recentSearchesRoot.init();
+
         this.bindEvents();
         this.loadSearchParamsFromURL();
         this.dropdownManager.setDropdown();
@@ -25,6 +63,10 @@ import FilteredSearchContainer from './container';
     cleanup() {
       this.unbindEvents();
       document.removeEventListener('beforeunload', this.cleanupWrapper);
+
+      if (this.recentSearchesRoot) {
+        this.recentSearchesRoot.destroy();
+      }
     }
 
     bindEvents() {
@@ -34,7 +76,7 @@ import FilteredSearchContainer from './container';
       this.handleInputPlaceholderWrapper = this.handleInputPlaceholder.bind(this);
       this.handleInputVisualTokenWrapper = this.handleInputVisualToken.bind(this);
       this.checkForEnterWrapper = this.checkForEnter.bind(this);
-      this.clearSearchWrapper = this.clearSearch.bind(this);
+      this.onClearSearchWrapper = this.onClearSearch.bind(this);
       this.checkForBackspaceWrapper = this.checkForBackspace.bind(this);
       this.removeSelectedTokenWrapper = this.removeSelectedToken.bind(this);
       this.unselectEditTokensWrapper = this.unselectEditTokens.bind(this);
@@ -42,8 +84,8 @@ import FilteredSearchContainer from './container';
       this.tokenChange = this.tokenChange.bind(this);
       this.addInputContainerFocusWrapper = this.addInputContainerFocus.bind(this);
       this.removeInputContainerFocusWrapper = this.removeInputContainerFocus.bind(this);
+      this.onrecentSearchesItemSelectedWrapper = this.onrecentSearchesItemSelected.bind(this);
 
-      this.filteredSearchInputForm = this.filteredSearchInput.form;
       this.filteredSearchInputForm.addEventListener('submit', this.handleFormSubmit);
       this.filteredSearchInput.addEventListener('input', this.setDropdownWrapper);
       this.filteredSearchInput.addEventListener('input', this.toggleClearSearchButtonWrapper);
@@ -56,11 +98,12 @@ import FilteredSearchContainer from './container';
       this.filteredSearchInput.addEventListener('focus', this.addInputContainerFocusWrapper);
       this.tokensContainer.addEventListener('click', FilteredSearchManager.selectToken);
       this.tokensContainer.addEventListener('dblclick', this.editTokenWrapper);
-      this.clearSearchButton.addEventListener('click', this.clearSearchWrapper);
+      this.clearSearchButton.addEventListener('click', this.onClearSearchWrapper);
       document.addEventListener('click', gl.FilteredSearchVisualTokens.unselectTokens);
       document.addEventListener('click', this.unselectEditTokensWrapper);
       document.addEventListener('click', this.removeInputContainerFocusWrapper);
       document.addEventListener('keydown', this.removeSelectedTokenWrapper);
+      eventHub.$on('recentSearchesItemSelected', this.onrecentSearchesItemSelectedWrapper);
     }
 
     unbindEvents() {
@@ -76,11 +119,12 @@ import FilteredSearchContainer from './container';
       this.filteredSearchInput.removeEventListener('focus', this.addInputContainerFocusWrapper);
       this.tokensContainer.removeEventListener('click', FilteredSearchManager.selectToken);
       this.tokensContainer.removeEventListener('dblclick', this.editTokenWrapper);
-      this.clearSearchButton.removeEventListener('click', this.clearSearchWrapper);
+      this.clearSearchButton.removeEventListener('click', this.onClearSearchWrapper);
       document.removeEventListener('click', gl.FilteredSearchVisualTokens.unselectTokens);
       document.removeEventListener('click', this.unselectEditTokensWrapper);
       document.removeEventListener('click', this.removeInputContainerFocusWrapper);
       document.removeEventListener('keydown', this.removeSelectedTokenWrapper);
+      eventHub.$off('recentSearchesItemSelected', this.onrecentSearchesItemSelectedWrapper);
     }
 
     checkForBackspace(e) {
@@ -131,7 +175,7 @@ import FilteredSearchContainer from './container';
     }
 
     addInputContainerFocus() {
-      const inputContainer = this.filteredSearchInput.closest('.filtered-search-input-container');
+      const inputContainer = this.filteredSearchInput.closest('.filtered-search-box');
 
       if (inputContainer) {
         inputContainer.classList.add('focus');
@@ -139,7 +183,7 @@ import FilteredSearchContainer from './container';
     }
 
     removeInputContainerFocus(e) {
-      const inputContainer = this.filteredSearchInput.closest('.filtered-search-input-container');
+      const inputContainer = this.filteredSearchInput.closest('.filtered-search-box');
       const isElementInFilteredSearch = inputContainer && inputContainer.contains(e.target);
       const isElementInDynamicFilterDropdown = e.target.closest('.filter-dropdown') !== null;
       const isElementInStaticFilterDropdown = e.target.closest('ul[data-dropdown]') !== null;
@@ -161,7 +205,7 @@ import FilteredSearchContainer from './container';
     }
 
     unselectEditTokens(e) {
-      const inputContainer = this.container.querySelector('.filtered-search-input-container');
+      const inputContainer = this.container.querySelector('.filtered-search-box');
       const isElementInFilteredSearch = inputContainer && inputContainer.contains(e.target);
       const isElementInFilterDropdown = e.target.closest('.filter-dropdown') !== null;
       const isElementTokensContainer = e.target.classList.contains('tokens-container');
@@ -215,9 +259,12 @@ import FilteredSearchContainer from './container';
       }
     }
 
-    clearSearch(e) {
+    onClearSearch(e) {
       e.preventDefault();
+      this.clearSearch();
+    }
 
+    clearSearch() {
       this.filteredSearchInput.value = '';
 
       const removeElements = [];
@@ -289,6 +336,17 @@ import FilteredSearchContainer from './container';
       this.search();
     }
 
+    saveCurrentSearchQuery() {
+      // Don't save before we have fetched the already saved searches
+      this.fetchingRecentSearchesPromise.then(() => {
+        const searchQuery = gl.DropdownUtils.getSearchQuery();
+        if (searchQuery.length > 0) {
+          const resultantSearches = this.recentSearchesStore.addRecentSearch(searchQuery);
+          this.recentSearchesService.save(resultantSearches);
+        }
+      });
+    }
+
     loadSearchParamsFromURL() {
       const params = gl.utils.getUrlParamsArray();
       const usernameParams = this.getUsernameParams();
@@ -343,6 +401,8 @@ import FilteredSearchContainer from './container';
         }
       });
 
+      this.saveCurrentSearchQuery();
+
       if (hasFilteredSearch) {
         this.clearSearchButton.classList.remove('hidden');
         this.handleInputPlaceholder();
@@ -351,8 +411,12 @@ import FilteredSearchContainer from './container';
 
     search() {
       const paths = [];
+      const searchQuery = gl.DropdownUtils.getSearchQuery();
+
+      this.saveCurrentSearchQuery();
+
       const { tokens, searchToken }
-        = this.tokenizer.processTokens(gl.DropdownUtils.getSearchQuery());
+        = this.tokenizer.processTokens(searchQuery);
       const currentState = gl.utils.getParameterByName('state') || 'opened';
       paths.push(`state=${currentState}`);
 
@@ -416,6 +480,13 @@ import FilteredSearchContainer from './container';
         currentDropdownRef.dispatchInputEvent();
       }
     }
+
+    onrecentSearchesItemSelected(text) {
+      this.clearSearch();
+      this.filteredSearchInput.value = text;
+      this.filteredSearchInput.dispatchEvent(new CustomEvent('input'));
+      this.search();
+    }
   }
 
   window.gl = window.gl || {};
diff --git a/app/assets/javascripts/filtered_search/recent_searches_root.js b/app/assets/javascripts/filtered_search/recent_searches_root.js
new file mode 100644
index 00000000000..4e38409e12a
--- /dev/null
+++ b/app/assets/javascripts/filtered_search/recent_searches_root.js
@@ -0,0 +1,59 @@
+import Vue from 'vue';
+import RecentSearchesDropdownContent from './components/recent_searches_dropdown_content';
+import eventHub from './event_hub';
+
+class RecentSearchesRoot {
+  constructor(
+    recentSearchesStore,
+    recentSearchesService,
+    wrapperElement,
+  ) {
+    this.store = recentSearchesStore;
+    this.service = recentSearchesService;
+    this.wrapperElement = wrapperElement;
+  }
+
+  init() {
+    this.bindEvents();
+    this.render();
+  }
+
+  bindEvents() {
+    this.onRequestClearRecentSearchesWrapper = this.onRequestClearRecentSearches.bind(this);
+
+    eventHub.$on('requestClearRecentSearches', this.onRequestClearRecentSearchesWrapper);
+  }
+
+  unbindEvents() {
+    eventHub.$off('requestClearRecentSearches', this.onRequestClearRecentSearchesWrapper);
+  }
+
+  render() {
+    this.vm = new Vue({
+      el: this.wrapperElement,
+      data: this.store.state,
+      template: `
+        <recent-searches-dropdown-content
+          :items="recentSearches" />
+      `,
+      components: {
+        'recent-searches-dropdown-content': RecentSearchesDropdownContent,
+      },
+    });
+  }
+
+  onRequestClearRecentSearches() {
+    const resultantSearches = this.store.setRecentSearches([]);
+    this.service.save(resultantSearches);
+  }
+
+  destroy() {
+    this.unbindEvents();
+    if (this.vm) {
+      this.vm.$destroy();
+    }
+  }
+
+}
+
+export default RecentSearchesRoot;
diff --git a/app/assets/javascripts/filtered_search/services/recent_searches_service.js b/app/assets/javascripts/filtered_search/services/recent_searches_service.js
new file mode 100644
index 00000000000..3e402d5aed0
--- /dev/null
+++ b/app/assets/javascripts/filtered_search/services/recent_searches_service.js
@@ -0,0 +1,26 @@
+class RecentSearchesService {
+  constructor(localStorageKey = 'issuable-recent-searches') {
+    this.localStorageKey = localStorageKey;
+  }
+
+  fetch() {
+    const input = window.localStorage.getItem(this.localStorageKey);
+
+    let searches = [];
+    if (input && input.length > 0) {
+      try {
+        searches = JSON.parse(input);
+      } catch (err) {
+        return Promise.reject(err);
+      }
+    }
+
+    return Promise.resolve(searches);
+  }
+
+  save(searches = []) {
+    window.localStorage.setItem(this.localStorageKey, JSON.stringify(searches));
+  }
+}
+
+export default RecentSearchesService;
diff --git a/app/assets/javascripts/filtered_search/stores/recent_searches_store.js b/app/assets/javascripts/filtered_search/stores/recent_searches_store.js
new file mode 100644
index 00000000000..066be69766a
--- /dev/null
+++ b/app/assets/javascripts/filtered_search/stores/recent_searches_store.js
@@ -0,0 +1,23 @@
+import _ from 'underscore';
+
+class RecentSearchesStore {
+  constructor(initialState = {}) {
+    this.state = Object.assign({
+      recentSearches: [],
+    }, initialState);
+  }
+
+  addRecentSearch(newSearch) {
+    this.setRecentSearches([newSearch].concat(this.state.recentSearches));
+
+    return this.state.recentSearches;
+  }
+
+  setRecentSearches(searches = []) {
+    const trimmedSearches = searches.map(search => search.trim());
+    this.state.recentSearches = _.uniq(trimmedSearches).slice(0, 5);
+    return this.state.recentSearches;
+  }
+}
+
+export default RecentSearchesStore;
diff --git a/app/assets/stylesheets/framework/dropdowns.scss b/app/assets/stylesheets/framework/dropdowns.scss
index 2ede47e9de6..23cba57f83a 100644
--- a/app/assets/stylesheets/framework/dropdowns.scss
+++ b/app/assets/stylesheets/framework/dropdowns.scss
@@ -177,10 +177,6 @@
   border-radius: $border-radius-base;
   box-shadow: 0 2px 4px $dropdown-shadow-color;
 
-  .filtered-search-input-container & {
-    max-width: 280px;
-  }
-
   &.is-loading {
     .dropdown-content {
       display: none;
@@ -467,6 +463,11 @@
   overflow-y: auto;
 }
 
+.dropdown-info-note {
+  color: $gl-text-color-secondary;
+  text-align: center;
+}
+
 .dropdown-footer {
   padding-top: 10px;
   margin-top: 10px;
diff --git a/app/assets/stylesheets/framework/filters.scss b/app/assets/stylesheets/framework/filters.scss
index 51805c5d734..484df6214d3 100644
--- a/app/assets/stylesheets/framework/filters.scss
+++ b/app/assets/stylesheets/framework/filters.scss
@@ -22,7 +22,6 @@
 }
 
 @media (min-width: $screen-sm-min) {
-  .issues-filters,
   .issues_bulk_update {
     .dropdown-menu-toggle {
       width: 132px;
@@ -56,7 +55,7 @@
   }
 }
 
-.filtered-search-container {
+.filtered-search-wrapper {
   display: -webkit-flex;
   display: flex;
 
@@ -151,11 +150,13 @@
   width: 100%;
 }
 
-.filtered-search-input-container {
+.filtered-search-box {
+  position: relative;
+  flex: 1;
   display: -webkit-flex;
   display: flex;
-  position: relative;
   width: 100%;
+  min-width: 0;
   border: 1px solid $border-color;
   background-color: $white-light;
 
@@ -163,14 +164,6 @@
     -webkit-flex: 1 1 auto;
     flex: 1 1 auto;
     margin-bottom: 10px;
-
-    .dropdown-menu {
-      width: auto;
-      left: 0;
-      right: 0;
-      max-width: none;
-      min-width: 100%;
-    }
   }
 
   &:hover {
@@ -229,6 +222,118 @@
   }
 }
 
+.filtered-search-box-input-container {
+  flex: 1;
+  position: relative;
+  // Fix PhantomJS not supporting `flex: 1;` properly.
+  // This is important because it can change the expected `e.target` when clicking things in tests.
+  // See https://gitlab.com/gitlab-org/gitlab-ce/blob/b54acba8b732688c59fe2f38510c469dc86ee499/spec/features/issues/filtered_search/visual_tokens_spec.rb#L61
+  // - With `width: 100%`: `e.target` = `.tokens-container`, https://i.imgur.com/jGq7wbx.png
+  // - Without `width: 100%`: `e.target` = `.filtered-search`, https://i.imgur.com/cNI2CyT.png
+  width: 100%;
+  min-width: 0;
+}
+
+.filtered-search-input-dropdown-menu {
+  max-width: 280px;
+
+  @media (max-width: $screen-xs-min) {
+    width: auto;
+    left: 0;
+    right: 0;
+    max-width: none;
+    min-width: 100%;
+  }
+}
+
+.filtered-search-history-dropdown-toggle-button {
+  display: flex;
+  align-items: center;
+  width: auto;
+  height: 100%;
+  padding-top: 0;
+  padding-left: 0.75em;
+  padding-bottom: 0;
+  padding-right: 0.5em;
+
+  background-color: transparent;
+  border-radius: 0;
+  border-top: 0;
+  border-left: 0;
+  border-bottom: 0;
+  border-right: 1px solid $border-color;
+
+  color: $gl-text-color-secondary;
+
+  transition: color 0.1s linear;
+
+  &:hover,
+  &:focus {
+    color: $gl-text-color;
+    border-color: $dropdown-input-focus-border;
+    outline: none;
+  }
+
+  .dropdown-toggle-text {
+    color: inherit;
+
+    .fa {
+      color: inherit;
+    }
+  }
+
+  .fa {
+    position: initial;
+  }
+
+}
+
+.filtered-search-history-dropdown-wrapper {
+  position: initial;
+  flex-shrink: 0;
+}
+
+.filtered-search-history-dropdown {
+  width: 40%;
+
+  @media (max-width: $screen-xs-min) {
+    left: 0;
+    right: 0;
+    max-width: none;
+  }
+}
+
+.filtered-search-history-dropdown-content {
+  max-height: none;
+}
+
+.filtered-search-history-dropdown-item,
+.filtered-search-history-clear-button {
+  @include dropdown-link;
+
+  overflow: hidden;
+  width: 100%;
+  margin: 0.5em 0;
+
+  background-color: transparent;
+  border: 0;
+  text-align: left;
+  white-space: nowrap;
+  text-overflow: ellipsis;
+}
+
+.filtered-search-history-dropdown-token {
+  display: inline;
+
+  &:not(:last-child) {
+    margin-right: 0.3em;
+  }
+
+  & > .value {
+    font-weight: 600;
+  }
+}
+
 .filter-dropdown-container {
   display: -webkit-flex;
   display: flex;
@@ -248,10 +353,8 @@
 }
 
 @media (min-width: $screen-sm-min) and (max-width: $screen-sm-max) {
-  .issues-details-filters {
-    .dropdown-menu-toggle {
-      width: 100px;
-    }
+  .issue-bulk-update-dropdown-toggle {
+    width: 100px;
   }
 }
 
diff --git a/app/helpers/dropdowns_helper.rb b/app/helpers/dropdowns_helper.rb
index 81e0b6bb5ae..8ed99642c7a 100644
--- a/app/helpers/dropdowns_helper.rb
+++ b/app/helpers/dropdowns_helper.rb
@@ -1,6 +1,6 @@
 module DropdownsHelper
   def dropdown_tag(toggle_text, options: {}, &block)
-    content_tag :div, class: "dropdown" do
+    content_tag :div, class: "dropdown #{options[:wrapper_class] if options.has_key?(:wrapper_class)}" do
       data_attr = { toggle: "dropdown" }
 
       if options.has_key?(:data)
@@ -20,7 +20,7 @@ module DropdownsHelper
           output << dropdown_filter(options[:placeholder])
         end
 
-        output << content_tag(:div, class: "dropdown-content") do
+        output << content_tag(:div, class: "dropdown-content #{options[:content_class] if options.has_key?(:content_class)}") do
           capture(&block) if block && !options.has_key?(:footer_content)
         end
 
diff --git a/app/views/shared/issuable/_filter.html.haml b/app/views/shared/issuable/_filter.html.haml
index 847a86e2e68..c72268473ca 100644
--- a/app/views/shared/issuable/_filter.html.haml
+++ b/app/views/shared/issuable/_filter.html.haml
@@ -40,21 +40,21 @@
       .issues_bulk_update.hide
         = form_tag [:bulk_update, @project.namespace.becomes(Namespace), @project, type], method: :post, class: 'bulk-update'  do
           .filter-item.inline
-            = dropdown_tag("Status", options: { toggle_class: "js-issue-status", title: "Change status", dropdown_class: "dropdown-menu-status dropdown-menu-selectable", data: { field_name: "update[state_event]", default_label: "Status" } } ) do
+            = dropdown_tag("Status", options: { toggle_class: "issue-bulk-update-dropdown-toggle js-issue-status", title: "Change status", dropdown_class: "dropdown-menu-status dropdown-menu-selectable", data: { field_name: "update[state_event]", default_label: "Status" } } ) do
               %ul
                 %li
                   %a{ href: "#", data: { id: "reopen" } } Open
                 %li
                   %a{ href: "#", data: {id: "close" } } Closed
           .filter-item.inline
-            = dropdown_tag("Assignee", options: { toggle_class: "js-user-search js-update-assignee js-filter-submit js-filter-bulk-update", title: "Assign to", filter: true, dropdown_class: "dropdown-menu-user dropdown-menu-selectable",
+            = dropdown_tag("Assignee", options: { toggle_class: "issue-bulk-update-dropdown-toggle js-user-search js-update-assignee js-filter-submit js-filter-bulk-update", title: "Assign to", filter: true, dropdown_class: "dropdown-menu-user dropdown-menu-selectable",
               placeholder: "Search authors", data: { first_user: (current_user.username if current_user), null_user: true, current_user: true, project_id: @project.id, field_name: "update[assignee_id]", default_label: "Assignee" } })
           .filter-item.inline
-            = dropdown_tag("Milestone", options: { title: "Assign milestone", toggle_class: 'js-milestone-select js-extra-options js-filter-submit js-filter-bulk-update', filter: true, dropdown_class: "dropdown-menu-selectable dropdown-menu-milestone", placeholder: "Search milestones", data: { show_no: true, field_name: "update[milestone_id]", default_label: "Milestone", project_id: @project.id, milestones: namespace_project_milestones_path(@project.namespace, @project, :json), use_id: true } })
+            = dropdown_tag("Milestone", options: { title: "Assign milestone", toggle_class: 'issue-bulk-update-dropdown-toggle js-milestone-select js-extra-options js-filter-submit js-filter-bulk-update', filter: true, dropdown_class: "dropdown-menu-selectable dropdown-menu-milestone", placeholder: "Search milestones", data: { show_no: true, field_name: "update[milestone_id]", default_label: "Milestone", project_id: @project.id, milestones: namespace_project_milestones_path(@project.namespace, @project, :json), use_id: true } })
           .filter-item.inline.labels-filter
             = render "shared/issuable/label_dropdown", classes: ['js-filter-bulk-update', 'js-multiselect'], dropdown_title: 'Apply a label', show_create: false, show_footer: false, extra_options: false, filter_submit: false, data_options: { persist_when_hide: "true", field_name: "update[label_ids][]", show_no: false, show_any: false, use_id: true }
           .filter-item.inline
-            = dropdown_tag("Subscription", options: { toggle_class: "js-subscription-event", title: "Change subscription", dropdown_class: "dropdown-menu-selectable", data: { field_name: "update[subscription_event]", default_label: "Subscription" } } ) do
+            = dropdown_tag("Subscription", options: { toggle_class: "issue-bulk-update-dropdown-toggle js-subscription-event", title: "Change subscription", dropdown_class: "dropdown-menu-selectable", data: { field_name: "update[subscription_event]", default_label: "Subscription" } } ) do
               %ul
                 %li
                   %a{ href: "#", data: { id: "subscribe" } } Subscribe
diff --git a/app/views/shared/issuable/_search_bar.html.haml b/app/views/shared/issuable/_search_bar.html.haml
index 330fa8a5b10..9e241c3ea12 100644
--- a/app/views/shared/issuable/_search_bar.html.haml
+++ b/app/views/shared/issuable/_search_bar.html.haml
@@ -10,85 +10,93 @@
         .check-all-holder
           = check_box_tag "check_all_issues", nil, false,
             class: "check_all_issues left"
-      .issues-other-filters.filtered-search-container
-        .filtered-search-input-container
-          .scroll-container
-            %ul.tokens-container.list-unstyled
-              %li.input-token
-                %input.form-control.filtered-search{ placeholder: 'Search or filter results...', data: { id: "filtered-search-#{type.to_s}", 'project-id' => @project.id, 'username-params' => @users.to_json(only: [:id, :username]), 'base-endpoint' => namespace_project_path(@project.namespace, @project) } }
-            = icon('filter')
-            %button.clear-search.hidden{ type: 'button' }
-              = icon('times')
-          #js-dropdown-hint.dropdown-menu.hint-dropdown
-            %ul{ data: { dropdown: true } }
-              %li.filter-dropdown-item{ data: { action: 'submit' } }
-                %button.btn.btn-link
-                  = icon('search')
-                  %span
-                    Press Enter or click to search
-            %ul.filter-dropdown{ data: { dynamic: true, dropdown: true } }
-              %li.filter-dropdown-item
-                %button.btn.btn-link
-                  -# Encapsulate static class name `{{icon}}` inside #{} to bypass
-                  -# haml lint's ClassAttributeWithStaticValue
-                  %i.fa{ class: "#{'{{icon}}'}" }
-                  %span.js-filter-hint
-                    {{hint}}
-                  %span.js-filter-tag.dropdown-light-content
-                    {{tag}}
-          #js-dropdown-author.dropdown-menu{ data: { icon: 'pencil', hint: 'author', tag: '@author' } }
-            %ul.filter-dropdown{ data: { dynamic: true, dropdown: true } }
-              %li.filter-dropdown-item
-                %button.btn.btn-link.dropdown-user
-                  %img.avatar{ alt: '{{name}}\'s avatar', width: '30', data: { src: '{{avatar_url}}' } }
-                  .dropdown-user-details
+      .issues-other-filters.filtered-search-wrapper
+        .filtered-search-box
+          = dropdown_tag(content_tag(:i, '', class: 'fa fa-history'),
+            options: { wrapper_class: "filtered-search-history-dropdown-wrapper",
+            toggle_class: "filtered-search-history-dropdown-toggle-button",
+            dropdown_class: "filtered-search-history-dropdown",
+            content_class: "filtered-search-history-dropdown-content",
+            title: "Recent searches" }) do
+            .js-filtered-search-history-dropdown
+          .filtered-search-box-input-container
+            .scroll-container
+              %ul.tokens-container.list-unstyled
+                %li.input-token
+                  %input.form-control.filtered-search{ placeholder: 'Search or filter results...', data: { id: "filtered-search-#{type.to_s}", 'project-id' => @project.id, 'username-params' => @users.to_json(only: [:id, :username]), 'base-endpoint' => namespace_project_path(@project.namespace, @project) } }
+              = icon('filter')
+              %button.clear-search.hidden{ type: 'button' }
+                = icon('times')
+            #js-dropdown-hint.filtered-search-input-dropdown-menu.dropdown-menu.hint-dropdown
+              %ul{ data: { dropdown: true } }
+                %li.filter-dropdown-item{ data: { action: 'submit' } }
+                  %button.btn.btn-link
+                    = icon('search')
                     %span
-                      {{name}}
-                    %span.dropdown-light-content
-                      @{{username}}
-          #js-dropdown-assignee.dropdown-menu{ data: { icon: 'user', hint: 'assignee', tag: '@assignee' } }
-            %ul{ data: { dropdown: true } }
-              %li.filter-dropdown-item{ data: { value: 'none' } }
-                %button.btn.btn-link
-                  No Assignee
-              %li.divider
-            %ul.filter-dropdown{ data: { dynamic: true, dropdown: true } }
-              %li.filter-dropdown-item
-                %button.btn.btn-link.dropdown-user
-                  %img.avatar{ alt: '{{name}}\'s avatar', width: '30', data: { src: '{{avatar_url}}' } }
-                  .dropdown-user-details
-                    %span
-                      {{name}}
-                    %span.dropdown-light-content
-                      @{{username}}
-          #js-dropdown-milestone.dropdown-menu{ data: { icon: 'clock-o', hint: 'milestone', tag: '%milestone' } }
-            %ul{ data: { dropdown: true } }
-              %li.filter-dropdown-item{ data: { value: 'none' } }
-                %button.btn.btn-link
-                  No Milestone
-              %li.filter-dropdown-item{ data: { value: 'upcoming' } }
-                %button.btn.btn-link
-                  Upcoming
-              %li.filter-dropdown-item{ 'data-value' => 'started' }
-                %button.btn.btn-link
-                  Started
-              %li.divider
-            %ul.filter-dropdown{ data: { dynamic: true, dropdown: true } }
-              %li.filter-dropdown-item
-                %button.btn.btn-link.js-data-value
-                  {{title}}
-          #js-dropdown-label.dropdown-menu{ data: { icon: 'tag', hint: 'label', tag: '~label', type: 'array' } }
-            %ul{ data: { dropdown: true } }
-              %li.filter-dropdown-item{ data: { value: 'none' } }
-                %button.btn.btn-link
-                  No Label
-              %li.divider
-            %ul.filter-dropdown{ data: { dynamic: true, dropdown: true } }
-              %li.filter-dropdown-item
-                %button.btn.btn-link
-                  %span.dropdown-label-box{ style: 'background: {{color}}' }
-                  %span.label-title.js-data-value
+                      Press Enter or click to search
+              %ul.filter-dropdown{ data: { dynamic: true, dropdown: true } }
+                %li.filter-dropdown-item
+                  %button.btn.btn-link
+                    -# Encapsulate static class name `{{icon}}` inside #{} to bypass
+                    -# haml lint's ClassAttributeWithStaticValue
+                    %i.fa{ class: "#{'{{icon}}'}" }
+                    %span.js-filter-hint
+                      {{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' } }
+              %ul.filter-dropdown{ data: { dynamic: true, dropdown: true } }
+                %li.filter-dropdown-item
+                  %button.btn.btn-link.dropdown-user
+                    %img.avatar{ alt: '{{name}}\'s avatar', width: '30', data: { src: '{{avatar_url}}' } }
+                    .dropdown-user-details
+                      %span
+                        {{name}}
+                      %span.dropdown-light-content
+                        @{{username}}
+            #js-dropdown-assignee.filtered-search-input-dropdown-menu.dropdown-menu{ data: { icon: 'user', hint: 'assignee', tag: '@assignee' } }
+              %ul{ data: { dropdown: true } }
+                %li.filter-dropdown-item{ data: { value: 'none' } }
+                  %button.btn.btn-link
+                    No Assignee
+                %li.divider
+              %ul.filter-dropdown{ data: { dynamic: true, dropdown: true } }
+                %li.filter-dropdown-item
+                  %button.btn.btn-link.dropdown-user
+                    %img.avatar{ alt: '{{name}}\'s avatar', width: '30', data: { src: '{{avatar_url}}' } }
+                    .dropdown-user-details
+                      %span
+                        {{name}}
+                      %span.dropdown-light-content
+                        @{{username}}
+            #js-dropdown-milestone.filtered-search-input-dropdown-menu.dropdown-menu{ data: { icon: 'clock-o', hint: 'milestone', tag: '%milestone' } }
+              %ul{ data: { dropdown: true } }
+                %li.filter-dropdown-item{ data: { value: 'none' } }
+                  %button.btn.btn-link
+                    No Milestone
+                %li.filter-dropdown-item{ data: { value: 'upcoming' } }
+                  %button.btn.btn-link
+                    Upcoming
+                %li.filter-dropdown-item{ 'data-value' => 'started' }
+                  %button.btn.btn-link
+                    Started
+                %li.divider
+              %ul.filter-dropdown{ data: { dynamic: true, dropdown: true } }
+                %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' } }
+              %ul{ data: { dropdown: true } }
+                %li.filter-dropdown-item{ data: { value: 'none' } }
+                  %button.btn.btn-link
+                    No Label
+                %li.divider
+              %ul.filter-dropdown{ data: { dynamic: true, dropdown: true } }
+                %li.filter-dropdown-item
+                  %button.btn.btn-link
+                    %span.dropdown-label-box{ style: 'background: {{color}}' }
+                    %span.label-title.js-data-value
+                      {{title}}
         .filter-dropdown-container
           - if type == :boards
             - if can?(current_user, :admin_list, @project)