Refactor upload service to return uploader

Also changes old calls to the service

app/controllers/concerns/uploads_actions.rb

@@ -7,7 +7,7 @@ module UploadsActions
   UPLOAD_MOUNTS = %w(avatar attachment file logo header_logo favicon).freeze
 
   def create
-    link_to_file = UploadService.new(model, params[:file], uploader_class).execute
+    link_to_file = UploadService.new(model, params[:file], uploader_class).execute.to_h
 
     respond_to do |format|
       if link_to_file

app/controllers/projects/issues_controller.rb

@@ -37,6 +37,8 @@ class Projects::IssuesController < Projects::ApplicationController
   # Allow create a new branch and empty WIP merge request from current issue
   before_action :authorize_create_merge_request_from!, only: [:create_merge_request]
 
+  before_action :authorize_import_issues!, only: [:import_csv]
+
   before_action :set_suggested_issues_feature_flags, only: [:new]
 
   respond_to :html
@@ -176,12 +178,10 @@ class Projects::IssuesController < Projects::ApplicationController
   end
 
   def import_csv
-    return render_404 unless Feature.enabled?(:issues_import_csv) && can?(current_user, :import_issues, project)
-
-    service = UploadService.new(project, params[:file])
+    return render_404 unless Feature.enabled?(:issues_import_csv)
 
-    if service.execute
-      ImportIssuesCsvWorker.perform_async(current_user.id, project.id, service.uploader.upload.id)
+    if uploader = UploadService.new(project, params[:file]).execute
+      ImportIssuesCsvWorker.perform_async(current_user.id, project.id, uploader.upload.id)
 
       flash[:notice] = _("Your issues are being imported. Once finished, you'll get a confirmation email.")
     else

app/services/upload_service.rb

 # frozen_string_literal: true
 
 class UploadService
-  attr_accessor :uploader
-
   def initialize(model, file, uploader_class = FileUploader, **uploader_context)
     @model, @file, @uploader_class, @uploader_context = model, file, uploader_class, uploader_context
   end
@@ -10,10 +8,10 @@ class UploadService
   def execute
     return nil unless @file && @file.size <= max_attachment_size
 
-    @uploader = @uploader_class.new(@model, nil, @uploader_context)
-    @uploader.store!(@file)
+    uploader = @uploader_class.new(@model, nil, @uploader_context)
+    uploader.store!(@file)
 
-    @uploader.to_h
+    uploader
   end
 
   private

lib/api/projects.rb

@@ -475,7 +475,7 @@ module API
         requires :file, type: File, desc: 'The file to be uploaded'
       end
       post ":id/uploads" do
-        UploadService.new(user_project, params[:file]).execute
+        UploadService.new(user_project, params[:file]).execute.to_h
       end
 
       desc 'Get the users list of a project' do

lib/gitlab/email/attachment_uploader.rb

@@ -23,7 +23,7 @@ module Gitlab
               content_type: attachment.content_type
             }
 
-            link = UploadService.new(project, file).execute
+            link = UploadService.new(project, file).execute.to_h
             attachments << link if link
           ensure
             tmp.close!

lib/gitlab/import_export/uploads_manager.rb

@@ -40,7 +40,7 @@ module Gitlab
       def add_upload(upload)
         uploader_context = FileUploader.extract_dynamic_path(upload).named_captures.symbolize_keys
 
-        UploadService.new(@project, File.open(upload, 'r'), FileUploader, uploader_context).execute
+        UploadService.new(@project, File.open(upload, 'r'), FileUploader, uploader_context).execute.to_h
       end
 
       def copy_project_uploads

spec/services/upload_service_spec.rb

@@ -68,6 +68,6 @@ describe UploadService do
   end
 
   def upload_file(project, file)
-    described_class.new(project, file, FileUploader).execute
+    described_class.new(project, file, FileUploader).execute.to_h
   end
 end