generate avatars rake task

lib/jobs/generate_avatars.rb

@@ -0,0 +1,42 @@
+require "image_sorcery"
+
+module Jobs
+
+  class GenerateAvatars < Jobs::Base
+
+    def execute(args)
+      upload = Upload.where(id: args[:upload_id]).first
+      return unless upload.present?
+
+      external_copy = Discourse.store.download(upload) if Discourse.store.external?
+      original_path = if Discourse.store.external?
+        external_copy.path
+      else
+        Discourse.store.path_for(upload)
+      end
+
+      [120, 45, 32, 25, 20].each do |s|
+        # handle retina too
+        [s, s * 2].each do |size|
+          # create a temp file with the same extension as the original
+          temp_file = Tempfile.new(["discourse-avatar", File.extname(original_path)])
+          temp_path = temp_file.path
+          #
+          Discourse.store.store_avatar(temp_file, upload, size) if ImageSorcery.new(original_path).convert(temp_path, gravity: "center", thumbnail: "#{size}x#{size}^", extent: "#{size}x#{size}")
+          # close && remove temp file
+          temp_file.close!
+        end
+      end
+
+      # make sure we remove the cached copy from external stores
+      external_copy.close! if Discourse.store.external?
+
+      user = User.where(id: upload.user_id).first
+      user.uploaded_avatar_template = Discourse.store.absolute_avatar_template(upload)
+      user.save!
+
+    end
+
+  end
+
+end