Added libs to create thumbnails in background

* added delayed_attachment_fu lib to process thumbnails in background * added create_thumbnails_job lib to create thumbnails (ActionItem1661)

Added libs to create thumbnails in background
* added delayed_attachment_fu lib to process thumbnails in background * added create_thumbnails_job lib to create thumbnails (ActionItem1661)
Daniela Feitosa · Antonio Terceiro
1 parent b7642d12
Showing 4 changed files with 87 additions and 0 deletions Show diff stats
config/initializers/delayed_attachment_fu.rb
lib/create_thumbnails_job.rb
lib/delayed_attachment_fu.rb
test/unit/create_thumbnails_job_test.rb
@@ -0,0 +1 @@
+require 'delayed_attachment_fu'
@@ -0,0 +1,6 @@
+class CreateThumbnailsJob < Struct.new(:class_name, :file_id)
+  def perform
+    file = class_name.constantize.find(file_id)
+    file.create_thumbnails
+  end
+end
@@ -0,0 +1,53 @@
+module DelayedAttachmentFu
+
+  module ClassMethods
+    def delay_attachment_fu_thumbnails
+      include DelayedAttachmentFu::InstanceMethods
+      after_create do |file|
+        if file.image?
+          Delayed::Job.enqueue CreateThumbnailsJob.new(file.class.name, file.id)
+        end
+      end
+    end
+  end
+
+  module InstanceMethods
+    # skip processing with RMagick
+    def process_attachment
+    end
+
+    def after_process_attachment
+      save_to_storage
+      @temp_paths.clear
+      @saved_attachment = nil
+      callback :after_attachment_saved
+    end
+
+    def create_thumbnails
+      if thumbnailable?
+        self.class.with_image(full_filename) do |img|
+          self.width = img.columns
+          self.height = img.rows
+          self.save!
+        end
+        self.class.attachment_options[:thumbnails].each do |suffix, size|
+          self.create_or_update_thumbnail(self.full_filename, suffix, size)
+        end
+        self.update_attributes!(:thumbnails_processed => true)
+      end
+    end
+
+    def public_filename(size=nil)
+      if self.thumbnails_processed
+        super(size)
+      else
+        size ||= 'thumb'
+        '/images/icons-app/image-loading-%s.png' % size
+      end
+    end
+
+
+  end
+end
+
+ActiveRecord::Base.send(:extend, DelayedAttachmentFu::ClassMethods)
@@ -0,0 +1,27 @@
+require File.dirname(__FILE__) + '/../test_helper'
+
+class CreateThumbnailsJobTest < ActiveSupport::TestCase
+
+  should 'create thumbnails to uploaded files' do
+    person = create_user('test_user').person
+    file = UploadedFile.create!(:uploaded_data => fixture_file_upload('/files/rails.png', 'image/png'), :profile => person)
+
+    assert_equal [], file.thumbnails
+    job = CreateThumbnailsJob.new(file.class.name, file.id)
+    job.perform
+    file.reload
+    assert_not_equal [], file.thumbnails
+  end
+
+  should 'set thumbnails_processed to true after finished' do
+    person = create_user('test_user').person
+    file = UploadedFile.create!(:uploaded_data => fixture_file_upload('/files/rails.png', 'image/png'), :profile => person)
+
+    job = CreateThumbnailsJob.new(file.class.name, file.id)
+    job.perform
+
+    file.reload
+    assert file.thumbnails_processed
+  end
+
+end
@@ -0,0 +1,6 @@		@@ -0,0 +1,6 @@
	1	+class CreateThumbnailsJob < Struct.new(:class_name, :file_id)
	2	+ def perform
	3	+ file = class_name.constantize.find(file_id)
	4	+ file.create_thumbnails
	5	+ end
	6	+end
@@ -0,0 +1,53 @@		@@ -0,0 +1,53 @@
	1	+module DelayedAttachmentFu
	2	+
	3	+ module ClassMethods
	4	+ def delay_attachment_fu_thumbnails
	5	+ include DelayedAttachmentFu::InstanceMethods
	6	+ after_create do \|file\|
	7	+ if file.image?
	8	+ Delayed::Job.enqueue CreateThumbnailsJob.new(file.class.name, file.id)
	9	+ end
	10	+ end
	11	+ end
	12	+ end
	13	+
	14	+ module InstanceMethods
	15	+ # skip processing with RMagick
	16	+ def process_attachment
	17	+ end
	18	+
	19	+ def after_process_attachment
	20	+ save_to_storage
	21	+ @temp_paths.clear
	22	+ @saved_attachment = nil
	23	+ callback :after_attachment_saved
	24	+ end
	25	+
	26	+ def create_thumbnails
	27	+ if thumbnailable?
	28	+ self.class.with_image(full_filename) do \|img\|
	29	+ self.width = img.columns
	30	+ self.height = img.rows
	31	+ self.save!
	32	+ end
	33	+ self.class.attachment_options[:thumbnails].each do \|suffix, size\|
	34	+ self.create_or_update_thumbnail(self.full_filename, suffix, size)
	35	+ end
	36	+ self.update_attributes!(:thumbnails_processed => true)
	37	+ end
	38	+ end
	39	+
	40	+ def public_filename(size=nil)
	41	+ if self.thumbnails_processed
	42	+ super(size)
	43	+ else
	44	+ size \|\|= 'thumb'
	45	+ '/images/icons-app/image-loading-%s.png' % size
	46	+ end
	47	+ end
	48	+
	49	+
	50	+ end
	51	+end
	52	+
	53	+ActiveRecord::Base.send(:extend, DelayedAttachmentFu::ClassMethods)
@@ -0,0 +1,27 @@		@@ -0,0 +1,27 @@
	1	+require File.dirname(__FILE__) + '/../test_helper'
	2	+
	3	+class CreateThumbnailsJobTest < ActiveSupport::TestCase
	4	+
	5	+ should 'create thumbnails to uploaded files' do
	6	+ person = create_user('test_user').person
	7	+ file = UploadedFile.create!(:uploaded_data => fixture_file_upload('/files/rails.png', 'image/png'), :profile => person)
	8	+
	9	+ assert_equal [], file.thumbnails
	10	+ job = CreateThumbnailsJob.new(file.class.name, file.id)
	11	+ job.perform
	12	+ file.reload
	13	+ assert_not_equal [], file.thumbnails
	14	+ end
	15	+
	16	+ should 'set thumbnails_processed to true after finished' do
	17	+ person = create_user('test_user').person
	18	+ file = UploadedFile.create!(:uploaded_data => fixture_file_upload('/files/rails.png', 'image/png'), :profile => person)
	19	+
	20	+ job = CreateThumbnailsJob.new(file.class.name, file.id)
	21	+ job.perform
	22	+
	23	+ file.reload
	24	+ assert file.thumbnails_processed
	25	+ end
	26	+
	27	+end