Add /post_replacements.json, /posts/1234/replacements.json.

app/controllers/post_replacements_controller.rb

@@ -0,0 +1,11 @@
+class PostReplacementsController < ApplicationController
+  respond_to :html, :xml, :json
+  before_filter :approver_only, except: [:index]
+
+  def index
+    params[:search][:post_id] = params.delete(:post_id) if params.has_key?(:post_id)
+    @post_replacements = PostReplacement.search(params[:search]).paginate(params[:page], limit: params[:limit])
+
+    respond_with(@post_replacements)
+  end
+end

app/models/post_replacement.rb

@@ -61,4 +61,32 @@ class PostReplacement < ActiveRecord::Base
     post.distribute_files
     post.update_iqdb_async
   end
+
+  module SearchMethods
+    def search(params = {})
+      q = all
+
+      if params[:creator_id].present?
+        q = q.where(creator_id: params[:creator_id].split(",").map(&:to_i))
+      end
+
+      if params[:creator_name].present?
+        q = q.where(creator_name: User.name_to_id(params[:creator_name]))
+      end
+
+      if params[:id].present?
+        q = q.where(id: params[:id].split(",").map(&:to_i))
+      end
+
+      if params[:post_id].present?
+        q = q.where(post_id: params[:post_id].split(",").map(&:to_i))
+      end
+
+      q = q.order("created_at DESC")
+
+      q
+    end
+  end
+
+  extend SearchMethods
 end

config/routes.rb

@@ -199,6 +199,7 @@ Rails.application.routes.draw do
   end
   resources :posts do
     resources :events, :only => [:index], :controller => "post_events"
+    resources :replacements, :only => [:index], :controller => "post_replacements"
     resource :artist_commentary, :only => [:index, :show] do
       collection { put :create_or_update }
       member { put :revert }
@@ -217,6 +218,7 @@ Rails.application.routes.draw do
   end
   resources :post_appeals
   resources :post_flags
+  resources :post_replacements, :only => [:index]
   resources :post_versions, :only => [:index, :search] do
     member do
       put :undo

test/factories/post_replacement.rb

@@ -0,0 +1,6 @@
+FactoryGirl.define do
+  factory(:post_replacement) do
+    original_url { FFaker::Internet.http_url }
+    replacement_url { FFaker::Internet.http_url }
+  end
+end

test/functional/post_replacements_controller_test.rb

@@ -0,0 +1,21 @@
+require 'test_helper'
+
+class PostReplacementsControllerTest < ActionController::TestCase
+  context "The post replacements controller" do
+    setup do
+      @user = FactoryGirl.create(:user, can_approve_posts: true)
+      CurrentUser.user = @user
+      CurrentUser.ip_addr = "127.0.0.1"
+
+      @post = FactoryGirl.create(:post)
+      @post_replacement = FactoryGirl.create(:post_replacement, post_id: @post.id)
+    end
+
+    context "index action" do
+      should "render" do
+        get :index, {format: :json}
+        assert_response :success
+      end
+    end
+  end
+end