Colorize labels in issue search field

14 files changed, 431 insertions, 7 deletions

diff --git a/app/assets/javascripts/filtered_search/filtered_search_visual_tokens.js b/app/assets/javascripts/filtered_search/filtered_search_visual_tokens.js
index 59ce0587e1e..f3003b86493 100644
--- a/app/assets/javascripts/filtered_search/filtered_search_visual_tokens.js
+++ b/app/assets/javascripts/filtered_search/filtered_search_visual_tokens.js
@@ -1,3 +1,5 @@
+import AjaxCache from '~/lib/utils/ajax_cache';
+import '~/flash'; /* global Flash */
 import FilteredSearchContainer from './container';
 
 class FilteredSearchVisualTokens {
@@ -48,6 +50,40 @@ class FilteredSearchVisualTokens {
     `;
   }
 
+  static updateLabelTokenColor(tokenValueContainer, tokenValue) {
+    const filteredSearchInput = FilteredSearchContainer.container.querySelector('.filtered-search');
+    const baseEndpoint = filteredSearchInput.dataset.baseEndpoint;
+    const labelsEndpoint = `${baseEndpoint}/labels.json`;
+
+    return AjaxCache.retrieve(labelsEndpoint)
+    .then((labels) => {
+      const matchingLabel = (labels || []).find(label => `~${gl.DropdownUtils.getEscapedText(label.title)}` === tokenValue);
+
+      if (!matchingLabel) {
+        return;
+      }
+
+      const tokenValueStyle = tokenValueContainer.style;
+      tokenValueStyle.backgroundColor = matchingLabel.color;
+      tokenValueStyle.color = matchingLabel.text_color;
+
+      if (matchingLabel.text_color === '#FFFFFF') {
+        const removeToken = tokenValueContainer.querySelector('.remove-token');
+        removeToken.classList.add('inverted');
+      }
+    })
+    .catch(() => new Flash('An error occurred while fetching label colors.'));
+  }
+
+  static renderVisualTokenValue(parentElement, tokenName, tokenValue) {
+    const tokenValueContainer = parentElement.querySelector('.value-container');
+    tokenValueContainer.querySelector('.value').innerText = tokenValue;
+
+    if (tokenName.toLowerCase() === 'label') {
+      FilteredSearchVisualTokens.updateLabelTokenColor(tokenValueContainer, tokenValue);
+    }
+  }
+
   static addVisualTokenElement(name, value, isSearchTerm) {
     const li = document.createElement('li');
     li.classList.add('js-visual-token');
@@ -55,7 +91,7 @@ class FilteredSearchVisualTokens {
 
     if (value) {
       li.innerHTML = FilteredSearchVisualTokens.createVisualTokenElementHTML();
-      li.querySelector('.value').innerText = value;
+      FilteredSearchVisualTokens.renderVisualTokenValue(li, name, value);
     } else {
       li.innerHTML = '<div class="name"></div>';
     }
@@ -74,7 +110,7 @@ class FilteredSearchVisualTokens {
       const name = FilteredSearchVisualTokens.getLastTokenPartial();
       lastVisualToken.innerHTML = FilteredSearchVisualTokens.createVisualTokenElementHTML();
       lastVisualToken.querySelector('.name').innerText = name;
-      lastVisualToken.querySelector('.value').innerText = value;
+      FilteredSearchVisualTokens.renderVisualTokenValue(lastVisualToken, name, value);
     }
   }
 
diff --git a/app/assets/javascripts/lib/utils/ajax_cache.js b/app/assets/javascripts/lib/utils/ajax_cache.js
new file mode 100644
index 00000000000..d99eefb5089
--- /dev/null
+++ b/app/assets/javascripts/lib/utils/ajax_cache.js
@@ -0,0 +1,32 @@
+const AjaxCache = {
+  internalStorage: { },
+  get(endpoint) {
+    return this.internalStorage[endpoint];
+  },
+  hasData(endpoint) {
+    return Object.prototype.hasOwnProperty.call(this.internalStorage, endpoint);
+  },
+  purge(endpoint) {
+    delete this.internalStorage[endpoint];
+  },
+  retrieve(endpoint) {
+    if (AjaxCache.hasData(endpoint)) {
+      return Promise.resolve(AjaxCache.get(endpoint));
+    }
+
+    return new Promise((resolve, reject) => {
+      $.ajax(endpoint) // eslint-disable-line promise/catch-or-return
+      .then(data => resolve(data),
+        (jqXHR, textStatus, errorThrown) => {
+          const error = new Error(`${endpoint}: ${errorThrown}`);
+          error.textStatus = textStatus;
+          reject(error);
+        },
+      );
+    })
+    .then((data) => { this.internalStorage[endpoint] = data; })
+    .then(() => AjaxCache.get(endpoint));
+  },
+};
+
+export default AjaxCache;
diff --git a/app/assets/stylesheets/framework/filters.scss b/app/assets/stylesheets/framework/filters.scss
index 0692f65043b..e624d0d951e 100644
--- a/app/assets/stylesheets/framework/filters.scss
+++ b/app/assets/stylesheets/framework/filters.scss
@@ -114,11 +114,21 @@
     padding-right: 8px;
 
     .fa-close {
-      color: $gl-text-color-disabled;
+      color: $gl-text-color-secondary;
     }
 
     &:hover .fa-close {
-      color: $gl-text-color-secondary;
+      color: $gl-text-color;
+    }
+
+    &.inverted {
+      .fa-close {
+        color: $gl-text-color-secondary-inverted;
+      }
+
+      &:hover .fa-close {
+        color: $gl-text-color-inverted;
+      }
     }
   }
 
diff --git a/app/assets/stylesheets/framework/variables.scss b/app/assets/stylesheets/framework/variables.scss
index 49741c963df..08bcb582613 100644
--- a/app/assets/stylesheets/framework/variables.scss
+++ b/app/assets/stylesheets/framework/variables.scss
@@ -101,6 +101,8 @@ $gl-font-size: 14px;
 $gl-text-color: rgba(0, 0, 0, .85);
 $gl-text-color-secondary: rgba(0, 0, 0, .55);
 $gl-text-color-disabled: rgba(0, 0, 0, .35);
+$gl-text-color-inverted: rgba(255, 255, 255, 1.0);
+$gl-text-color-secondary-inverted: rgba(255, 255, 255, .85);
 $gl-text-green: $green-600;
 $gl-text-red: $red-500;
 $gl-text-orange: $orange-600;
diff --git a/app/controllers/dashboard/labels_controller.rb b/app/controllers/dashboard/labels_controller.rb
index d5031da867a..dd1d46a68c7 100644
--- a/app/controllers/dashboard/labels_controller.rb
+++ b/app/controllers/dashboard/labels_controller.rb
@@ -3,7 +3,7 @@ class Dashboard::LabelsController < Dashboard::ApplicationController
     labels = LabelsFinder.new(current_user).execute
 
     respond_to do |format|
-      format.json { render json: labels.as_json(only: [:id, :title, :color]) }
+      format.json { render json: LabelSerializer.new.represent_appearance(labels) }
     end
   end
 end
diff --git a/app/controllers/groups/labels_controller.rb b/app/controllers/groups/labels_controller.rb
index facb25525b5..3fa0516fb0c 100644
--- a/app/controllers/groups/labels_controller.rb
+++ b/app/controllers/groups/labels_controller.rb
@@ -15,7 +15,7 @@ class Groups::LabelsController < Groups::ApplicationController
 
       format.json do
         available_labels = LabelsFinder.new(current_user, group_id: @group.id).execute
-        render json: available_labels.as_json(only: [:id, :title, :color])
+        render json: LabelSerializer.new.represent_appearance(available_labels)
       end
     end
   end
diff --git a/app/controllers/projects/labels_controller.rb b/app/controllers/projects/labels_controller.rb
index 2f55ba4e700..71bfb7163da 100644
--- a/app/controllers/projects/labels_controller.rb
+++ b/app/controllers/projects/labels_controller.rb
@@ -19,7 +19,7 @@ class Projects::LabelsController < Projects::ApplicationController
     respond_to do |format|
       format.html
       format.json do
-        render json: @available_labels.as_json(only: [:id, :title, :color])
+        render json: LabelSerializer.new.represent_appearance(@available_labels)
       end
     end
   end
diff --git a/app/serializers/label_entity.rb b/app/serializers/label_entity.rb
index 304fd9de08f..ad565654342 100644
--- a/app/serializers/label_entity.rb
+++ b/app/serializers/label_entity.rb
@@ -6,6 +6,7 @@ class LabelEntity < Grape::Entity
   expose :group_id
   expose :project_id
   expose :template
+  expose :text_color
   expose :created_at
   expose :updated_at
 end
diff --git a/app/serializers/label_serializer.rb b/app/serializers/label_serializer.rb
new file mode 100644
index 00000000000..ad6ba8c46c9
--- /dev/null
+++ b/app/serializers/label_serializer.rb
@@ -0,0 +1,7 @@
+class LabelSerializer < BaseSerializer
+  entity LabelEntity
+
+  def represent_appearance(resource)
+    represent(resource, { only: [:id, :title, :color, :text_color] })
+  end
+end
diff --git a/changelogs/unreleased/winh-visual-token-labels.yml b/changelogs/unreleased/winh-visual-token-labels.yml
new file mode 100644
index 00000000000..d4952e910b4
--- /dev/null
+++ b/changelogs/unreleased/winh-visual-token-labels.yml
@@ -0,0 +1,4 @@
+---
+title: Colorize labels in search field
+merge_request: 11047
+author:
diff --git a/spec/javascripts/filtered_search/filtered_search_visual_tokens_spec.js b/spec/javascripts/filtered_search/filtered_search_visual_tokens_spec.js
index d75b9061281..8b750561eb7 100644
--- a/spec/javascripts/filtered_search/filtered_search_visual_tokens_spec.js
+++ b/spec/javascripts/filtered_search/filtered_search_visual_tokens_spec.js
@@ -1,3 +1,5 @@
+import AjaxCache from '~/lib/utils/ajax_cache';
+
 require('~/filtered_search/filtered_search_visual_tokens');
 const FilteredSearchSpecHelper = require('../helpers/filtered_search_spec_helper');
 
@@ -611,4 +613,103 @@ describe('Filtered Search Visual Tokens', () => {
       expect(token.querySelector('.value').innerText).toEqual('~bug');
     });
   });
+
+  describe('renderVisualTokenValue', () => {
+    let searchTokens;
+
+    beforeEach(() => {
+      tokensContainer.innerHTML = FilteredSearchSpecHelper.createTokensContainerHTML(`
+        ${FilteredSearchSpecHelper.createFilterVisualTokenHTML('label', 'none')}
+        ${FilteredSearchSpecHelper.createSearchVisualTokenHTML('search')}
+        ${FilteredSearchSpecHelper.createFilterVisualTokenHTML('milestone', 'upcoming')}
+      `);
+
+      searchTokens = document.querySelectorAll('.filtered-search-token');
+    });
+
+    it('renders a token value element', () => {
+      spyOn(gl.FilteredSearchVisualTokens, 'updateLabelTokenColor');
+      const updateLabelTokenColorSpy = gl.FilteredSearchVisualTokens.updateLabelTokenColor;
+
+      expect(searchTokens.length).toBe(2);
+      Array.prototype.forEach.call(searchTokens, (token) => {
+        updateLabelTokenColorSpy.calls.reset();
+
+        const tokenName = token.querySelector('.name').innerText;
+        const tokenValue = 'new value';
+        gl.FilteredSearchVisualTokens.renderVisualTokenValue(token, tokenName, tokenValue);
+
+        const tokenValueElement = token.querySelector('.value');
+        expect(tokenValueElement.innerText).toBe(tokenValue);
+
+        if (tokenName.toLowerCase() === 'label') {
+          const tokenValueContainer = token.querySelector('.value-container');
+          expect(updateLabelTokenColorSpy.calls.count()).toBe(1);
+          const expectedArgs = [tokenValueContainer, tokenValue];
+          expect(updateLabelTokenColorSpy.calls.argsFor(0)).toEqual(expectedArgs);
+        } else {
+          expect(updateLabelTokenColorSpy.calls.count()).toBe(0);
+        }
+      });
+    });
+  });
+
+  describe('updateLabelTokenColor', () => {
+    const jsonFixtureName = 'labels/project_labels.json';
+    const dummyEndpoint = '/dummy/endpoint';
+
+    preloadFixtures(jsonFixtureName);
+    const labelData = getJSONFixture(jsonFixtureName);
+    const findLabel = tokenValue => labelData.find(
+      label => tokenValue === `~${gl.DropdownUtils.getEscapedText(label.title)}`,
+    );
+
+    const bugLabelToken = FilteredSearchSpecHelper.createFilterVisualToken('label', '~bug');
+    const missingLabelToken = FilteredSearchSpecHelper.createFilterVisualToken('label', '~doesnotexist');
+    const spaceLabelToken = FilteredSearchSpecHelper.createFilterVisualToken('label', '~"some space"');
+
+    const parseColor = (color) => {
+      const dummyElement = document.createElement('div');
+      dummyElement.style.color = color;
+      return dummyElement.style.color;
+    };
+
+    beforeEach(() => {
+      tokensContainer.innerHTML = FilteredSearchSpecHelper.createTokensContainerHTML(`
+        ${bugLabelToken.outerHTML}
+        ${missingLabelToken.outerHTML}
+        ${spaceLabelToken.outerHTML}
+      `);
+
+      const filteredSearchInput = document.querySelector('.filtered-search');
+      filteredSearchInput.dataset.baseEndpoint = dummyEndpoint;
+
+      AjaxCache.internalStorage = { };
+      AjaxCache.internalStorage[`${dummyEndpoint}/labels.json`] = labelData;
+    });
+
+    const testCase = (token, done) => {
+      const tokenValueContainer = token.querySelector('.value-container');
+      const tokenValue = token.querySelector('.value').innerText;
+      const label = findLabel(tokenValue);
+
+      gl.FilteredSearchVisualTokens.updateLabelTokenColor(tokenValueContainer, tokenValue)
+      .then(() => {
+        if (label) {
+          expect(tokenValueContainer.getAttribute('style')).not.toBe(null);
+          expect(tokenValueContainer.style.backgroundColor).toBe(parseColor(label.color));
+          expect(tokenValueContainer.style.color).toBe(parseColor(label.text_color));
+        } else {
+          expect(token).toBe(missingLabelToken);
+          expect(tokenValueContainer.getAttribute('style')).toBe(null);
+        }
+      })
+      .then(done)
+      .catch(fail);
+    };
+
+    it('updates the color of a label token', done => testCase(bugLabelToken, done));
+    it('updates the color of a label token with spaces', done => testCase(spaceLabelToken, done));
+    it('does not change color of a missing label', done => testCase(missingLabelToken, done));
+  });
 });
diff --git a/spec/javascripts/fixtures/labels.rb b/spec/javascripts/fixtures/labels.rb
new file mode 100644
index 00000000000..2e4811b64a4
--- /dev/null
+++ b/spec/javascripts/fixtures/labels.rb
@@ -0,0 +1,56 @@
+require 'spec_helper'
+
+describe 'Labels (JavaScript fixtures)' do
+  include JavaScriptFixturesHelpers
+
+  let(:admin) { create(:admin) }
+  let(:group) { create(:group, name: 'frontend-fixtures-group' )}
+  let(:project) { create(:project_empty_repo, namespace: group, path: 'labels-project') }
+
+  let!(:project_label_bug) { create(:label, project: project, title: 'bug', color: '#FF0000') }
+  let!(:project_label_enhancement) { create(:label, project: project, title: 'enhancement', color: '#00FF00') }
+  let!(:project_label_feature) { create(:label, project: project, title: 'feature', color: '#0000FF') }
+
+  let!(:group_label_roses) { create(:group_label, group: group, title: 'roses', color: '#FF0000') }
+  let!(:groub_label_space) { create(:group_label, group: group, title: 'some space', color: '#FFFFFF') }
+  let!(:groub_label_violets) { create(:group_label, group: group, title: 'violets', color: '#0000FF') }
+
+  before(:all) do
+    clean_frontend_fixtures('labels/')
+  end
+
+  describe Groups::LabelsController, '(JavaScript fixtures)', type: :controller do
+    render_views
+
+    before(:each) do
+      sign_in(admin)
+    end
+
+    it 'labels/group_labels.json' do |example|
+      get :index,
+        group_id: group,
+        format: 'json'
+
+      expect(response).to be_success
+      store_frontend_fixture(response, example.description)
+    end
+  end
+
+  describe Projects::LabelsController, '(JavaScript fixtures)', type: :controller do
+    render_views
+
+    before(:each) do
+      sign_in(admin)
+    end
+
+    it 'labels/project_labels.json' do |example|
+      get :index,
+        namespace_id: group,
+        project_id: project,
+        format: 'json'
+
+      expect(response).to be_success
+      store_frontend_fixture(response, example.description)
+    end
+  end
+end
diff --git a/spec/javascripts/lib/utils/ajax_cache_spec.js b/spec/javascripts/lib/utils/ajax_cache_spec.js
new file mode 100644
index 00000000000..7b466a11b92
--- /dev/null
+++ b/spec/javascripts/lib/utils/ajax_cache_spec.js
@@ -0,0 +1,129 @@
+import AjaxCache from '~/lib/utils/ajax_cache';
+
+describe('AjaxCache', () => {
+  const dummyEndpoint = '/AjaxCache/dummyEndpoint';
+  const dummyResponse = {
+    important: 'dummy data',
+  };
+  let ajaxSpy = (url) => {
+    expect(url).toBe(dummyEndpoint);
+    const deferred = $.Deferred();
+    deferred.resolve(dummyResponse);
+    return deferred.promise();
+  };
+
+  beforeEach(() => {
+    AjaxCache.internalStorage = { };
+    spyOn(jQuery, 'ajax').and.callFake(url => ajaxSpy(url));
+  });
+
+  describe('#get', () => {
+    it('returns undefined if cache is empty', () => {
+      const data = AjaxCache.get(dummyEndpoint);
+
+      expect(data).toBe(undefined);
+    });
+
+    it('returns undefined if cache contains no matching data', () => {
+      AjaxCache.internalStorage['not matching'] = dummyResponse;
+
+      const data = AjaxCache.get(dummyEndpoint);
+
+      expect(data).toBe(undefined);
+    });
+
+    it('returns matching data', () => {
+      AjaxCache.internalStorage[dummyEndpoint] = dummyResponse;
+
+      const data = AjaxCache.get(dummyEndpoint);
+
+      expect(data).toBe(dummyResponse);
+    });
+  });
+
+  describe('#hasData', () => {
+    it('returns false if cache is empty', () => {
+      expect(AjaxCache.hasData(dummyEndpoint)).toBe(false);
+    });
+
+    it('returns false if cache contains no matching data', () => {
+      AjaxCache.internalStorage['not matching'] = dummyResponse;
+
+      expect(AjaxCache.hasData(dummyEndpoint)).toBe(false);
+    });
+
+    it('returns true if data is available', () => {
+      AjaxCache.internalStorage[dummyEndpoint] = dummyResponse;
+
+      expect(AjaxCache.hasData(dummyEndpoint)).toBe(true);
+    });
+  });
+
+  describe('#purge', () => {
+    it('does nothing if cache is empty', () => {
+      AjaxCache.purge(dummyEndpoint);
+
+      expect(AjaxCache.internalStorage).toEqual({ });
+    });
+
+    it('does nothing if cache contains no matching data', () => {
+      AjaxCache.internalStorage['not matching'] = dummyResponse;
+
+      AjaxCache.purge(dummyEndpoint);
+
+      expect(AjaxCache.internalStorage['not matching']).toBe(dummyResponse);
+    });
+
+    it('removes matching data', () => {
+      AjaxCache.internalStorage[dummyEndpoint] = dummyResponse;
+
+      AjaxCache.purge(dummyEndpoint);
+
+      expect(AjaxCache.internalStorage).toEqual({ });
+    });
+  });
+
+  describe('#retrieve', () => {
+    it('stores and returns data from Ajax call if cache is empty', (done) => {
+      AjaxCache.retrieve(dummyEndpoint)
+      .then((data) => {
+        expect(data).toBe(dummyResponse);
+        expect(AjaxCache.internalStorage[dummyEndpoint]).toBe(dummyResponse);
+      })
+      .then(done)
+      .catch(fail);
+    });
+
+    it('returns undefined if Ajax call fails and cache is empty', (done) => {
+      const dummyStatusText = 'exploded';
+      const dummyErrorMessage = 'server exploded';
+      ajaxSpy = (url) => {
+        expect(url).toBe(dummyEndpoint);
+        const deferred = $.Deferred();
+        deferred.reject(null, dummyStatusText, dummyErrorMessage);
+        return deferred.promise();
+      };
+
+      AjaxCache.retrieve(dummyEndpoint)
+      .then(data => fail(`Received unexpected data: ${JSON.stringify(data)}`))
+      .catch((error) => {
+        expect(error.message).toBe(`${dummyEndpoint}: ${dummyErrorMessage}`);
+        expect(error.textStatus).toBe(dummyStatusText);
+        done();
+      })
+      .catch(fail);
+    });
+
+    it('makes no Ajax call if matching data exists', (done) => {
+      AjaxCache.internalStorage[dummyEndpoint] = dummyResponse;
+      ajaxSpy = () => fail(new Error('expected no Ajax call!'));
+
+      AjaxCache.retrieve(dummyEndpoint)
+      .then((data) => {
+        expect(data).toBe(dummyResponse);
+      })
+      .then(done)
+      .catch(fail);
+    });
+  });
+});
diff --git a/spec/serializers/label_serializer_spec.rb b/spec/serializers/label_serializer_spec.rb
new file mode 100644
index 00000000000..c58c7da1f9e
--- /dev/null
+++ b/spec/serializers/label_serializer_spec.rb
@@ -0,0 +1,46 @@
+require 'spec_helper'
+
+describe LabelSerializer do
+  let(:user) { create(:user) }
+
+  let(:serializer) do
+    described_class.new(user: user)
+  end
+
+  subject { serializer.represent(resource) }
+
+  describe '#represent' do
+    context 'when a single object is being serialized' do
+      let(:resource) { create(:label) }
+
+      it 'serializes the label object' do
+        expect(subject[:id]).to eq resource.id
+      end
+    end
+
+    context 'when multiple objects are being serialized' do
+      let(:num_labels) { 2 }
+      let(:resource) { create_list(:label, num_labels) }
+
+      it 'serializes the array of labels' do
+        expect(subject.size).to eq(num_labels)
+      end
+    end
+  end
+
+  describe '#represent_appearance' do
+    context 'when represents only appearance' do
+      let(:resource) { create(:label) }
+
+      subject { serializer.represent_appearance(resource) }
+
+      it 'serializes only attributes used for appearance' do
+        expect(subject.keys).to eq([:id, :title, :color, :text_color])
+        expect(subject[:id]).to eq(resource.id)
+        expect(subject[:title]).to eq(resource.title)
+        expect(subject[:color]).to eq(resource.color)
+        expect(subject[:text_color]).to eq(resource.text_color)
+      end
+    end
+  end
+end