Fix old api compatibility and tests

app/helpers/labels_helper.rb

@@ -5,13 +5,7 @@ module LabelsHelper
 
   def render_colored_label(label)
     label_color = label.color || "#428bca"
-    r, g, b = label_color.slice(1,7).scan(/.{2}/).map(&:hex)
-
-    if (r + g + b) > 500
-      text_color = "#333"
-    else
-      text_color = "#FFF"
-    end
+    text_color = text_color_for_bg(label_color)
 
     content_tag :span, class: 'label color-label', style: "background:#{label_color};color:#{text_color}" do
       label.name
@@ -30,4 +24,14 @@ module LabelsHelper
       '#FFECDB'
     ]
   end
+
+  def text_color_for_bg(bg_color)
+    r, g, b = bg_color.slice(1,7).scan(/.{2}/).map(&:hex)
+
+    if (r + g + b) > 500
+      "#333"
+    else
+      "#FFF"
+    end
+  end
 end

app/models/concerns/issuable.rb

@@ -133,4 +133,15 @@ module Issuable
       object_attributes: self.attributes
     }
   end
+
+  def label_names
+    labels.order('title ASC').pluck(:title)
+  end
+
+  def add_labels_by_names(label_names)
+    label_names.each do |label_name|
+      label = project.labels.find_or_create_by(title: label_name.strip)
+      self.labels << label
+    end
+  end
 end

lib/api/entities.rb

@@ -126,7 +126,7 @@ module API
     end
 
     class Issue < ProjectEntity
-      expose :label_list, as: :labels
+      expose :label_names, as: :labels
       expose :milestone, using: Entities::Milestone
       expose :assignee, :author, using: Entities::UserBasic
     end
@@ -135,7 +135,7 @@ module API
       expose :target_branch, :source_branch, :upvotes, :downvotes
       expose :author, :assignee, using: Entities::UserBasic
       expose :source_project_id, :target_project_id
-      expose :label_list, as: :labels
+      expose :label_names, as: :labels
     end
 
     class SSHKey < Grape::Entity

lib/api/issues.rb

@@ -50,10 +50,15 @@ module API
       post ":id/issues" do
         required_attributes! [:title]
         attrs = attributes_for_keys [:title, :description, :assignee_id, :milestone_id]
-        attrs[:label_list] = params[:labels] if params[:labels].present?
+
         issue = ::Issues::CreateService.new(user_project, current_user, attrs).execute
 
         if issue.valid?
+          # Find or create labels and attach to issue
+          if params[:labels].present?
+            issue.add_labels_by_names(params[:labels].split(","))
+          end
+
           present issue, with: Entities::Issue
         else
           not_found!
@@ -76,13 +81,16 @@ module API
       put ":id/issues/:issue_id" do
         issue = user_project.issues.find(params[:issue_id])
         authorize! :modify_issue, issue
-
         attrs = attributes_for_keys [:title, :description, :assignee_id, :milestone_id, :state_event]
-        attrs[:label_list] = params[:labels] if params[:labels].present?
 
         issue = ::Issues::UpdateService.new(user_project, current_user, attrs).execute(issue)
 
         if issue.valid?
+          # Find or create labels and attach to issue
+          if params[:labels].present?
+            issue.add_labels_by_names(params[:labels].split(","))
+          end
+
           present issue, with: Entities::Issue
         else
           not_found!

lib/api/merge_requests.rb

@@ -76,10 +76,14 @@ module API
         authorize! :write_merge_request, user_project
         required_attributes! [:source_branch, :target_branch, :title]
         attrs = attributes_for_keys [:source_branch, :target_branch, :assignee_id, :title, :target_project_id, :description]
-        attrs[:label_list] = params[:labels] if params[:labels].present?
         merge_request = ::MergeRequests::CreateService.new(user_project, current_user, attrs).execute
 
         if merge_request.valid?
+          # Find or create labels and attach to issue
+          if params[:labels].present?
+            merge_request.add_labels_by_names(params[:labels].split(","))
+          end
+
           present merge_request, with: Entities::MergeRequest
         else
           handle_merge_request_errors! merge_request.errors
@@ -103,12 +107,16 @@ module API
       #
       put ":id/merge_request/:merge_request_id" do
         attrs = attributes_for_keys [:source_branch, :target_branch, :assignee_id, :title, :state_event, :description]
-        attrs[:label_list] = params[:labels] if params[:labels].present?
         merge_request = user_project.merge_requests.find(params[:merge_request_id])
         authorize! :modify_merge_request, merge_request
         merge_request = ::MergeRequests::UpdateService.new(user_project, current_user, attrs).execute(merge_request)
 
         if merge_request.valid?
+          # Find or create labels and attach to issue
+          if params[:labels].present?
+            merge_request.add_labels_by_names(params[:labels].split(","))
+          end
+
           present merge_request, with: Entities::MergeRequest
         else
           handle_merge_request_errors! merge_request.errors

spec/helpers/labels_helper_spec.rb

 require 'spec_helper'
 
 describe LabelsHelper do
-  describe '#label_css_class' do
-    it 'returns label-danger when given Bug as param' do
-      expect(label_css_class('bug')).to eq('label-danger')
-    end
-
-    it 'returns label-danger when given Bug as param' do
-      expect(label_css_class('Bug')).to eq('label-danger')
-    end
-  end
+  it { expect(text_color_for_bg('#EEEEEE')).to eq('#333') }
+  it { expect(text_color_for_bg('#222E2E')).to eq('#FFF') }
 end