Move code for issue creation to service.

The goal of suych refactoring is to get rid of observers.
Its much easier to test and code when object creation and all other
related actions done in one class instead of splited across observers,
callbacks etc.

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

6 files changed, 67 insertions, 21 deletions

diff --git a/app/controllers/projects/issues_controller.rb b/app/controllers/projects/issues_controller.rb
index eef849d8209..ca85ba6b257 100644
--- a/app/controllers/projects/issues_controller.rb
+++ b/app/controllers/projects/issues_controller.rb
@@ -59,9 +59,7 @@ class Projects::IssuesController < Projects::ApplicationController
   end
 
   def create
-    @issue = @project.issues.new(params[:issue])
-    @issue.author = current_user
-    @issue.save
+    @issue = Issues::CreateService.new(project, current_user, params[:issue]).execute
 
     respond_to do |format|
       format.html do
diff --git a/app/observers/issue_observer.rb b/app/observers/issue_observer.rb
index 30da1f83da7..c2132ddca55 100644
--- a/app/observers/issue_observer.rb
+++ b/app/observers/issue_observer.rb
@@ -1,11 +1,4 @@
 class IssueObserver < BaseObserver
-  def after_create(issue)
-    notification.new_issue(issue, current_user)
-    event_service.open_issue(issue, current_user)
-    issue.create_cross_references!(issue.project, current_user)
-    execute_hooks(issue)
-  end
-
   def after_close(issue, transition)
     notification.close_issue(issue, current_user)
     event_service.close_issue(issue, current_user)
diff --git a/app/services/base_service.rb b/app/services/base_service.rb
index 610f0474872..9ad80923152 100644
--- a/app/services/base_service.rb
+++ b/app/services/base_service.rb
@@ -16,4 +16,16 @@ class BaseService
   def can?(object, action, subject)
     abilities.allowed?(object, action, subject)
   end
+
+  def notification_service
+    NotificationService.new
+  end
+
+  def event_service
+    EventCreateService.new
+  end
+
+  def log_info message
+    Gitlab::AppLogger.info message
+  end
 end
diff --git a/app/services/issues/create_service.rb b/app/services/issues/create_service.rb
new file mode 100644
index 00000000000..37f440fc40e
--- /dev/null
+++ b/app/services/issues/create_service.rb
@@ -0,0 +1,23 @@
+module Issues
+  class CreateService < BaseService
+    def execute
+      issue = project.issues.new(params)
+      issue.author = current_user
+
+      if issue.save
+        notification_service.new_issue(issue, current_user)
+        event_service.open_issue(issue, current_user)
+        issue.create_cross_references!(issue.project, current_user)
+        execute_hooks(issue)
+      end
+
+      issue
+    end
+
+    private
+
+    def execute_hooks(issue)
+      issue.project.execute_hooks(issue.to_hook_data, :issue_hooks)
+    end
+  end
+end
diff --git a/lib/api/issues.rb b/lib/api/issues.rb
index 3d15c35b8cc..169c58b0075 100644
--- a/lib/api/issues.rb
+++ b/lib/api/issues.rb
@@ -48,17 +48,15 @@ module API
       # Example Request:
       #   POST /projects/:id/issues
       post ":id/issues" do
-        set_current_user_for_thread do
-          required_attributes! [:title]
-          attrs = attributes_for_keys [:title, :description, :assignee_id, :milestone_id]
-          attrs[:label_list] = params[:labels] if params[:labels].present?
-          @issue = user_project.issues.new attrs
-          @issue.author = current_user
-          if @issue.save
-            present @issue, with: Entities::Issue
-          else
-            not_found!
-          end
+        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?
+          present issue, with: Entities::Issue
+        else
+          not_found!
         end
       end
 
diff --git a/spec/services/issues/create_service_spec.rb b/spec/services/issues/create_service_spec.rb
new file mode 100644
index 00000000000..7e2d5ad2e81
--- /dev/null
+++ b/spec/services/issues/create_service_spec.rb
@@ -0,0 +1,22 @@
+require 'spec_helper'
+
+describe Issues::CreateService do
+  let(:project) { create(:empty_project) }
+  let(:user) { create(:user) }
+
+  describe :execute do
+    context "valid params" do
+      before do
+        project.team << [user, :master]
+        opts = {
+          title: 'Awesome issue',
+          description: 'please fix'
+        }
+
+        @issue = Issues::CreateService.new(project, user, opts).execute
+      end
+
+      it { @issue.should be_valid }
+    end
+  end
+end