add new uploads/batch endpoint for handling twitter galleries

app/logical/downloads/rewrite_strategies/base.rb

@@ -6,7 +6,7 @@ module Downloads
       end
 
       def self.strategies
-        [Pixiv, NicoSeiga, Twitpic, DeviantArt, Tumblr, Moebooru, Twitter]
+        [Downloads::RewriteStrategies::Pixiv, Downloads::RewriteStrategies::NicoSeiga, Downloads::RewriteStrategies::Twitpic, Downloads::RewriteStrategies::DeviantArt, Downloads::RewriteStrategies::Tumblr, Downloads::RewriteStrategies::Moebooru, Downloads::RewriteStrategies::Twitter]
       end
 
       def rewrite(url, headers, data = {})

app/logical/twitter_service.rb

@@ -0,0 +1,33 @@
+class TwitterService
+  def client
+    raise "Twitter API keys not set" if Danbooru.config.twitter_api_key.nil?
+
+    @client ||= begin
+      rest_client = Twitter::REST::Client.new do |config|
+        config.consumer_key = Danbooru.config.twitter_api_key
+        config.consumer_secret = Danbooru.config.twitter_api_secret
+        if bearer_token = Cache.get("twitter-api-token")
+          config.bearer_token = bearer_token
+        end
+      end
+
+      Cache.put("twitter-api-token", rest_client.bearer_token)
+
+      rest_client
+    end
+  end
+
+  def image_urls(tweet_url)
+    attrs = client.status(tweet_url).attrs
+    urls = []
+    attrs[:entities][:media].each do |obj|
+      urls << obj[:media_url]
+    end
+    attrs[:extended_entities][:media].each do |obj|
+      urls << obj[:media_url]
+    end
+    urls.uniq
+  rescue
+    []
+  end
+end