Merge branch 'label-tooltip-sidebar-collapsed' into 'master'

Added tooltip to label value in collapsed sidebar

## What does this MR do?

Adds a list of the issuables labels to a tooltip in the collapsed
sidebar. Limited to 5 otherwise the list could get crazy long.

Closes #19398

See merge request !5232

7 files changed, 161 insertions, 4 deletions

diff --git a/CHANGELOG b/CHANGELOG
index 42f1c0aa268..24a87f3cc9d 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -19,6 +19,7 @@ v 8.11.0 (unreleased)
   - API: Endpoints for enabling and disabling deploy keys
   - API: List access requests, request access, approve, and deny access requests to a project or a group. !4833
   - Use long options for curl examples in documentation !5703 (winniehell)
+  - Added tooltip listing label names to the labels value in the collapsed issuable sidebar
   - Remove magic comments (`# encoding: UTF-8`) from Ruby files. !5456 (winniehell)
   - GitLab Performance Monitoring can now track custom events such as the number of tags pushed to a repository
   - Add support for relative links starting with ./ or / to RelativeLinkFilter (winniehell)
diff --git a/app/assets/javascripts/labels_select.js b/app/assets/javascripts/labels_select.js
index 0526430989f..565dbeacdb3 100644
--- a/app/assets/javascripts/labels_select.js
+++ b/app/assets/javascripts/labels_select.js
@@ -4,7 +4,7 @@
       var _this;
       _this = this;
       $('.js-label-select').each(function(i, dropdown) {
-        var $block, $colorPreview, $dropdown, $form, $loading, $selectbox, $sidebarCollapsedValue, $value, abilityName, defaultLabel, enableLabelCreateButton, issueURLSplit, issueUpdateURL, labelHTMLTemplate, labelNoneHTMLTemplate, labelUrl, projectId, saveLabelData, selectedLabel, showAny, showNo;
+        var $block, $colorPreview, $dropdown, $form, $loading, $selectbox, $sidebarCollapsedValue, $value, abilityName, defaultLabel, enableLabelCreateButton, issueURLSplit, issueUpdateURL, labelHTMLTemplate, labelNoneHTMLTemplate, labelUrl, projectId, saveLabelData, selectedLabel, showAny, showNo, $sidebarLabelTooltip;
         $dropdown = $(dropdown);
         projectId = $dropdown.data('project-id');
         labelUrl = $dropdown.data('labels');
@@ -21,6 +21,7 @@
         $block = $selectbox.closest('.block');
         $form = $dropdown.closest('form');
         $sidebarCollapsedValue = $block.find('.sidebar-collapsed-icon span');
+        $sidebarLabelTooltip = $block.find('.js-sidebar-labels-tooltip');
         $value = $block.find('.value');
         $loading = $block.find('.block-loading').fadeOut();
         if (issueUpdateURL != null) {
@@ -31,7 +32,11 @@
           labelNoneHTMLTemplate = '<span class="no-value">None</span>';
         }
 
-        new gl.CreateLabelDropdown($dropdown.closest('.dropdown').find('.dropdown-new-label'), projectId);
+        $sidebarLabelTooltip.tooltip();
+
+        if ($dropdown.closest('.dropdown').find('.dropdown-new-label').length) {
+          new gl.CreateLabelDropdown($dropdown.closest('.dropdown').find('.dropdown-new-label'), projectId);
+        }
 
         saveLabelData = function() {
           var data, selected;
@@ -52,7 +57,7 @@
             dataType: 'JSON',
             data: data
           }).done(function(data) {
-            var labelCount, template;
+            var labelCount, template, labelTooltipTitle, labelTitles;
             $loading.fadeOut();
             $dropdown.trigger('loaded.gl.dropdown');
             $selectbox.hide();
@@ -66,6 +71,27 @@
             }
             $value.removeAttr('style').html(template);
             $sidebarCollapsedValue.text(labelCount);
+
+            if (data.labels.length) {
+              labelTitles = data.labels.map(function(label) {
+                return label.title;
+              });
+
+              if (labelTitles.length > 5) {
+                labelTitles = labelTitles.slice(0, 5);
+                labelTitles.push('and ' + (data.labels.length - 5) + ' more');
+              }
+
+              labelTooltipTitle = labelTitles.join(', ');
+            } else {
+              labelTooltipTitle = '';
+              $sidebarLabelTooltip.tooltip('destroy');
+            }
+
+            $sidebarLabelTooltip
+              .attr('title', labelTooltipTitle)
+              .tooltip('fixTitle');
+
             $('.has-tooltip', $value).tooltip({
               container: 'body'
             });
diff --git a/app/helpers/issuables_helper.rb b/app/helpers/issuables_helper.rb
index 47d174361db..b9baeb1d6c4 100644
--- a/app/helpers/issuables_helper.rb
+++ b/app/helpers/issuables_helper.rb
@@ -72,6 +72,15 @@ module IssuablesHelper
     end
   end
 
+  def issuable_labels_tooltip(labels, limit: 5)
+    first, last = labels.partition.with_index{ |_, i| i < limit  }
+
+    label_names = first.collect(&:name)
+    label_names << "and #{last.size} more" unless last.empty?
+
+    label_names.join(', ')
+  end
+
   private
 
   def sidebar_gutter_collapsed?
diff --git a/app/views/shared/issuable/_sidebar.html.haml b/app/views/shared/issuable/_sidebar.html.haml
index 8e2fcbdfab8..c1b50e65af5 100644
--- a/app/views/shared/issuable/_sidebar.html.haml
+++ b/app/views/shared/issuable/_sidebar.html.haml
@@ -109,7 +109,7 @@
 
       - if issuable.project.labels.any?
         .block.labels
-          .sidebar-collapsed-icon
+          .sidebar-collapsed-icon.js-sidebar-labels-tooltip{ title: issuable_labels_tooltip(issuable.labels_array), data: { placement: "left", container: "body" } }
             = icon('tags')
             %span
               = issuable.labels_array.size
diff --git a/spec/helpers/issuables_helper_spec.rb b/spec/helpers/issuables_helper_spec.rb
new file mode 100644
index 00000000000..2dd2eab0524
--- /dev/null
+++ b/spec/helpers/issuables_helper_spec.rb
@@ -0,0 +1,16 @@
+require 'spec_helper'
+
+describe IssuablesHelper do 
+  let(:label)  { build_stubbed(:label) }
+  let(:label2) { build_stubbed(:label) }
+
+  context 'label tooltip' do
+    it 'returns label text' do
+      expect(issuable_labels_tooltip([label])).to eq(label.title)
+    end
+
+    it 'returns label text' do
+      expect(issuable_labels_tooltip([label, label2], limit: 1)).to eq("#{label.title}, and 1 more")
+    end
+  end
+end
diff --git a/spec/javascripts/fixtures/issue_sidebar_label.html.haml b/spec/javascripts/fixtures/issue_sidebar_label.html.haml
new file mode 100644
index 00000000000..397bdc85c67
--- /dev/null
+++ b/spec/javascripts/fixtures/issue_sidebar_label.html.haml
@@ -0,0 +1,16 @@
+.block.labels
+  .sidebar-collapsed-icon.js-sidebar-labels-tooltip
+  .title.hide-collapsed
+    %a.edit-link.pull-right{ href: "#" }
+      Edit
+  .selectbox.hide-collapsed{ style: "display: none;" }
+    .dropdown
+      %button.dropdown-menu-toggle.js-label-select.js-multiselect{ type: "button", data: { ability_name: "issue", field_name: "issue[label_names][]", issue_update: "/root/test/issues/2.json", labels: "/root/test/labels.json", project_id: "12", show_any: "true", show_no: "true", toggle: "dropdown" } }
+        %span.dropdown-toggle-text
+          Label
+        %i.fa.fa-chevron-down
+      .dropdown-menu.dropdown-select.dropdown-menu-paging.dropdown-menu-labels.dropdown-menu-selectable
+        .dropdown-page-one
+          .dropdown-content
+          .dropdown-loading
+            %i.fa.fa-spinner.fa-spin
diff --git a/spec/javascripts/labels_issue_sidebar_spec.js.es6 b/spec/javascripts/labels_issue_sidebar_spec.js.es6
new file mode 100644
index 00000000000..840c7b6d015
--- /dev/null
+++ b/spec/javascripts/labels_issue_sidebar_spec.js.es6
@@ -0,0 +1,89 @@
+//= require lib/utils/type_utility
+//= require jquery
+//= require bootstrap
+//= require gl_dropdown
+//= require select2
+//= require jquery.nicescroll
+//= require api
+//= require create_label
+//= require issuable_context
+//= require users_select
+//= require labels_select
+
+(() => {
+  let saveLabelCount = 0;
+  describe('Issue dropdown sidebar', () => {
+    fixture.preload('issue_sidebar_label.html');
+
+    beforeEach(() => {
+      fixture.load('issue_sidebar_label.html');
+      new IssuableContext('{"id":1,"name":"Administrator","username":"root"}');
+      new LabelsSelect();
+
+      spyOn(jQuery, 'ajax').and.callFake((req) => {
+        const d = $.Deferred();
+        let LABELS_DATA = []
+
+        if (req.url === '/root/test/labels.json') {
+          for (let i = 0; i < 10; i++) {
+            LABELS_DATA.push({id: i, title: `test ${i}`, color: '#5CB85C'});
+          }
+        } else if (req.url === '/root/test/issues/2.json') {
+          let tmp = []
+          for (let i = 0; i < saveLabelCount; i++) {
+            tmp.push({id: i, title: `test ${i}`, color: '#5CB85C'});
+          }
+          LABELS_DATA = {labels: tmp};
+        }
+
+        d.resolve(LABELS_DATA);
+        return d.promise();
+      });
+    });
+
+    it('changes collapsed tooltip when changing labels when less than 5', (done) => {
+      saveLabelCount = 5;
+      $('.edit-link').get(0).click();
+
+      setTimeout(() => {
+        expect($('.dropdown-content a').length).toBe(10);
+
+        $('.dropdow-content a').each((i, $link) => {
+          if (i < 5) {
+            $link.get(0).click();
+          }
+        });
+
+        $('.edit-link').get(0).click();
+
+        setTimeout(() => {
+          expect($('.sidebar-collapsed-icon').attr('data-original-title')).toBe('test 0, test 1, test 2, test 3, test 4');
+          done();
+        }, 0);
+      }, 0);
+    });
+
+    it('changes collapsed tooltip when changing labels when more than 5', (done) => {
+      saveLabelCount = 6;
+      $('.edit-link').get(0).click();
+
+      setTimeout(() => {
+        expect($('.dropdown-content a').length).toBe(10);
+
+        $('.dropdow-content a').each((i, $link) => {
+          if (i < 5) {
+            $link.get(0).click();
+          }
+        });
+
+        $('.edit-link').get(0).click();
+
+        setTimeout(() => {
+          expect($('.sidebar-collapsed-icon').attr('data-original-title')).toBe('test 0, test 1, test 2, test 3, test 4, and 1 more');
+          done();
+        }, 0);
+      }, 0);
+    });
+  });
+})();
+