Implement basic upload tags change report

app/controllers/upload_tags_report_controller.rb

@@ -0,0 +1,9 @@
+class UploadTagsReportController < ApplicationController
+  respond_to :html, :xml, :json
+
+  def show
+    @user = User.find(params[:id])
+    @upload_reports = UploadTagsReport.for_user(params[:id]).order("id desc").paginate(params[:page], :limit => params[:limit])
+    respond_with(@upload_reports)
+  end
+end

app/helpers/upload_tags_report_helper.rb

@@ -0,0 +1,12 @@
+module UploadTagsReportHelper
+  def diff_to_current(report)
+    html = []
+    report.added_tags_array.each do |tag|
+      html << '<ins>+' + link_to(wordbreakify(tag), posts_path(:tags => tag)) + '</ins>'
+    end
+    report.removed_tags_array.each do |tag|
+      html << '<del>-' + link_to(wordbreakify(tag), posts_path(:tags => tag)) + '</del>'
+    end
+    return html.join(" ").html_safe
+  end
+end

app/models/upload_tags_report.rb

@@ -0,0 +1,67 @@
+class UploadTagsReport < Post
+
+  def readonly?
+    true
+  end
+
+  module ApiMethods
+
+    def as_json(options = {})
+      options ||= {}
+      options[:only] ||= [:id]
+      super(options)
+    end
+
+    def to_xml(options = {}, &block)
+      options ||= {}
+      options[:only] ||= [:id, :uploader_id]
+      super(options, &block)
+    end
+
+    def method_attributes
+      [:uploader_tags, :added_tags, :removed_tags]
+    end
+
+  end
+
+  include ApiMethods
+
+  def uploader_tags_array
+    @uploader_tags ||= begin
+      added_tags = []
+      PostVersion.where(post_id: id, updater_id: uploader_id).each do |version|
+        added_tags += version.changes[:added_tags]
+      end
+      added_tags.uniq.sort
+    end
+  end
+
+  def current_tags_array
+    latest_tags = tag_array
+    latest_tags << "rating:#{rating}" if rating.present?
+    latest_tags << "parent:#{parent_id}" if parent_id.present?
+    latest_tags << "source:#{source}" if source.present?
+    latest_tags
+  end
+
+  def added_tags_array
+    current_tags_array - uploader_tags_array
+  end
+
+  def removed_tags_array
+    uploader_tags_array - current_tags_array
+  end
+
+  def uploader_tags
+    uploader_tags_array.join(' ')
+  end
+
+  def added_tags
+    added_tags_array.join(' ')
+  end
+
+  def removed_tags
+    removed_tags_array.join(' ')
+  end
+
+end

app/views/upload_tags_report/show.html.erb

@@ -0,0 +1,35 @@
+<div id="c-post-versions">
+  <div id="a-index">
+    <h1>Upload tag changes report for <%= @user.pretty_name %></h1>
+    <table class="striped">
+      <thead>
+        <tr>
+        <th width="10%">Post ID</th>
+        <th width="45%">Tags added by uploader</th>
+        <th width="45%">Tags changed by other users</th>
+        </tr>
+        </thead>
+      <tbody>
+        <% @upload_reports.each do |upload_report| %>
+          <tr>
+            <td><%= link_to(upload_report.id, post_path(:id => upload_report.id ))%></td>
+            <td>
+              <% upload_report.uploader_tags_array.each do |tag_name| %>
+                <span class="category-<%= Tag.category_for(tag_name) %>">
+                  <%= link_to(tag_name.tr("_", " "), posts_path(:tags => tag_name)) %>
+                </span>
+              <% end %>
+            </td>
+            <td><%= diff_to_current(upload_report) %>
+          </tr>
+        <% end %>
+      </tbody>
+    </table>
+    <%= numbered_paginator(@upload_reports) %>
+    </div>
+</div>
+
+
+<% content_for(:page_title) do %>
+  Upload tag changes for <%= @user.pretty_name %> - <%= Danbooru.config.app_name %>
+<% end %>

config/routes.rb

@@ -1,4 +1,5 @@
 Rails.application.routes.draw do
+
   namespace :admin do
     resources :users, :only => [:edit, :update]
     resource  :alias_and_implication_import, :only => [:new, :create]
@@ -322,6 +323,8 @@ Rails.application.routes.draw do
     end
   end
 
+  resources :upload_tags_report, :only => [:show]
+
   # aliases
   resources :wpages, :controller => "wiki_pages"
   resources :ftopics, :controller => "forum_topics"