Optional domain block attribute that prevents media attachments from being downloaded

app/services/process_feed_service.rb

@@ -180,6 +180,8 @@ class ProcessFeedService < BaseService
     end
 
     def media_from_xml(parent, xml)
+      return if DomainBlock.find_by(domain: parent.account.domain)&.reject_media?
+
       xml.xpath('./xmlns:link[@rel="enclosure"]', xmlns: TagManager::XMLNS).each do |link|
         next unless link['href']
 

app/services/process_hashtags_service.rb

@@ -4,7 +4,7 @@ class ProcessHashtagsService < BaseService
   def call(status, tags = [])
     tags = status.text.scan(Tag::HASHTAG_RE).map(&:first) if status.local?
 
-    tags.map { |str| str.mb_chars.downcase }.uniq{ |t| t.to_s }.each do |tag|
+    tags.map { |str| str.mb_chars.downcase }.uniq(&:to_s).each do |tag|
       status.tags << Tag.where(name: tag).first_or_initialize(name: tag)
     end
 

db/migrate/20170123203248_add_reject_media_to_domain_blocks.rb

+class AddRejectMediaToDomainBlocks < ActiveRecord::Migration[5.0]
+  def change
+    add_column :domain_blocks, :reject_media, :boolean
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20170123162658) do
+ActiveRecord::Schema.define(version: 20170123203248) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -55,10 +55,11 @@ ActiveRecord::Schema.define(version: 20170123162658) do
   end
 
   create_table "domain_blocks", force: :cascade do |t|
-    t.string   "domain",     default: "", null: false
-    t.datetime "created_at",              null: false
-    t.datetime "updated_at",              null: false
-    t.integer  "severity",   default: 0
+    t.string   "domain",       default: "", null: false
+    t.datetime "created_at",                null: false
+    t.datetime "updated_at",                null: false
+    t.integer  "severity",     default: 0
+    t.boolean  "reject_media"
     t.index ["domain"], name: "index_domain_blocks_on_domain", unique: true, using: :btree
   end