refactor iqdb endpoints

app/controllers/iqdb_queries_controller.rb

@@ -3,35 +3,27 @@ class IqdbQueriesController < ApplicationController
 
   def show
     if params[:url]
-      url = URI.parse(Danbooru.config.iqdbs_server)
-      url.path = "/similar"
-      url.query = {callback: iqdb_queries_url(format: params[:format]), url: params[:url]}.to_query
-      redirect_to url.to_s
-      return
+      @matches = IqdbProxy.query(params[:url])
     end
 
     if params[:post_id]
-      post = Post.find(params[:post_id])
-      url = URI.parse(Danbooru.config.iqdbs_server)
-      url.path = "/similar"
-      url.query = {callback: iqdb_queries_url(format: params[:format]), url: post.preview_file_url}.to_query
-      redirect_to url.to_s
-      return      
+      @matches = IqdbProxy.query(Post.find(params[:post_id]).preview_file_url)
     end
 
     if params[:matches]
-      @matches = JSON.parse(params[:matches])
-      @matches = @matches.map {|x| [Post.find(x[0]), x[1]]}
+      @matches = IqdbProxy.decorate_posts(JSON.parse(params[:matches]))
     end
 
-    respond_with(@matches)
-  end
+    respond_with(@matches) do |fmt|
+      fmt.html
 
-  def preview
-    url = URI.parse(Danbooru.config.iqdbs_server)
-    url.path = "/similar"
-    url.query = {url: params[:url]}.to_query
-    @results = HTTParty.get(url.to_s).parsed_response
-    render layout: false
+      fmt.html.xhr do
+        render layout: false
+      end
+      
+      fmt.json do
+        render json: @matches
+      end
+    end
   end
 end