Improve variables in mr widget

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

app/controllers/projects/merge_requests_controller.rb

@@ -139,14 +139,13 @@ class Projects::MergeRequestsController < Projects::ApplicationController
       @merge_request.check_if_can_be_merged
     end
 
-    @allowed_to_merge = allowed_to_merge?
     closes_issues
 
     render partial: "projects/merge_requests/widget/show.html.haml", layout: false
   end
 
   def automerge
-    return access_denied! unless allowed_to_merge?
+    return access_denied! unless @merge_request.can_be_merged_by?(current_user)
 
     if @merge_request.automergeable?
       AutoMergeWorker.perform_async(@merge_request.id, current_user.id, params)
@@ -255,8 +254,6 @@ class Projects::MergeRequestsController < Projects::ApplicationController
     @commits = @merge_request.commits
 
     @merge_request_diff = @merge_request.merge_request_diff
-    @allowed_to_merge = allowed_to_merge?
-    @show_merge_controls = @merge_request.open? && @commits.any? && @allowed_to_merge
     @source_branch = @merge_request.source_project.repository.find_branch(@merge_request.source_branch).try(:name)
 
     if @merge_request.locked_long_ago?
@@ -265,19 +262,11 @@ class Projects::MergeRequestsController < Projects::ApplicationController
     end
   end
 
-  def allowed_to_merge?
-    allowed_to_push_code?(project, @merge_request.target_branch)
-  end
-
   def invalid_mr
     # Render special view for MR with removed source or target branch
     render 'invalid'
   end
 
-  def allowed_to_push_code?(project, branch)
-    ::Gitlab::GitAccess.new(current_user, project).can_push_to_branch?(branch)
-  end
-
   def merge_request_params
     params.require(:merge_request).permit(
       :title, :assignee_id, :source_project_id, :source_branch,

app/models/merge_request.rb

@@ -413,4 +413,8 @@ class MergeRequest < ActiveRecord::Base
   def branch_missing?
     !source_branch_exists? || !target_branch_exists?
   end
+
+  def can_be_merged_by?(user)
+    ::Gitlab::GitAccess.new(user, project).can_push_to_branch?(target_branch)
+  end
 end

app/views/projects/merge_requests/widget/_open.html.haml

@@ -15,7 +15,7 @@
       = render 'projects/merge_requests/widget/open/conflicts'
     - elsif @merge_request.work_in_progress?
       = render 'projects/merge_requests/widget/open/wip'
-    - elsif !@allowed_to_merge
+    - elsif !@merge_request.can_be_merged_by?(current_user)
       = render 'projects/merge_requests/widget/open/not_allowed'
     - elsif @merge_request.can_be_merged?
       = render 'projects/merge_requests/widget/open/accept'

app/views/projects/merge_requests/widget/open/_conflicts.html.haml

@@ -1,4 +1,4 @@
-- if @allowed_to_merge
+- if @merge_request.can_be_merged_by?(current_user)
   %h4
     This merge request contains merge conflicts that must be resolved.
     You can try it manually on the

app/views/projects/merge_requests/widget/open/_wip.html.haml

@@ -1,4 +1,4 @@
-- if @allowed_to_merge
+- if @merge_request.can_be_merged_by?(current_user)
   %h4
     This merge request cannot be accepted because it is marked as Work In Progress.