fixes #720

app/assets/javascripts/posts.js

@@ -133,6 +133,29 @@
       $("#post_tag_string").trigger("focus");
       e.preventDefault();
     });
+
+    $("#copy-notes").click(function(e) {
+      var current_post_id = $("meta[name=post-id]").attr("content");
+      var other_post_id = prompt("Enter the ID of the post to copy all notes to:");
+
+      if (other_post_id !== null) {
+        $.ajax("/posts/" + current_post_id + "/copy_notes", {
+          type: "PUT",
+          data: {
+            other_post_id: other_post_id
+          },
+          complete: function(data) {
+            if (data.status === 200) {
+              Danbooru.notice("Successfully copied notes to <a href='" + other_post_id + "'>post #" + other_post_id + "</a>");
+            } else {
+              Danbooru.error("There was an error copying notes to <a href='" + other_post_id + "'>post #" + other_post_id + "</a>");
+            }
+          },
+        });
+      }
+
+      e.preventDefault();
+    });
   }
 
   Danbooru.Post.initialize_post_relationship_previews = function() {

app/controllers/posts_controller.rb

@@ -1,5 +1,6 @@
 class PostsController < ApplicationController
   before_filter :member_only, :except => [:show, :show_seq, :index]
+  before_filter :builder_only, :only => [:copy_notes]
   after_filter :save_recent_tags, :only => [:update]
   respond_to :html, :xml, :json
   rescue_from PostSets::SearchError, :with => :rescue_exception
@@ -76,6 +77,13 @@ class PostsController < ApplicationController
     end
   end
 
+  def copy_notes
+    @post = Post.find(params[:id])
+    @other_post = Post.find(params[:other_post_id].to_i)
+    @post.copy_notes_to(@other_post)
+    render :nothing => true
+  end
+
 private
   def tag_query
     params[:tags] || (params[:post] && params[:post][:tags])

app/models/note.rb

@@ -174,6 +174,20 @@ class Note < ActiveRecord::Base
     save!
   end
 
+  def copy_to(new_post)
+    new_note = dup
+    new_note.post_id = new_post.id
+
+    width_ratio = new_post.image_width.to_f / post.image_width
+    height_ratio = new_post.image_height.to_f / post.image_height
+    new_note.x = x * width_ratio
+    new_note.y = y * height_ratio
+    new_note.width = width * width_ratio
+    new_note.height = height * height_ratio
+
+    new_note.save
+  end
+
   def self.undo_changes_by_user(user_id)
     transaction do
       notes = Note.joins(:versions).where(["note_versions.updater_id = ?", user_id]).select("DISTINCT notes.*").all

app/models/post.rb

@@ -900,6 +900,12 @@ class Post < ActiveRecord::Base
     def last_noted_at_as_integer
       last_noted_at.to_i
     end
+
+    def copy_notes_to(other_post)
+      notes.each do |note|
+        note.copy_to(other_post)
+      end
+    end
   end
 
   module ApiMethods

app/views/posts/partials/show/_options.html.erb

@@ -9,6 +9,9 @@
   <% else %>
     <li><%= link_to "Add note", "#", :id => "translate", :title => "Shortcut is N" %></li>
   <% end %>
+  <% if CurrentUser.is_builder? %>
+    <li><%= link_to "Copy all notes", "#", :id => "copy-notes" %></li>
+  <% end %>
   <li><%= link_to "Find similar", "http://danbooru.iqdb.org/db-search.php?url=http://#{Danbooru.config.hostname}#{post.preview_file_url}" %></li>
 
   <% if post.is_status_locked? %>

config/routes.rb

@@ -142,6 +142,7 @@ Danbooru::Application.routes.draw do
     resources :votes, :controller => "post_votes", :only => [:create, :destroy]
     member do
       put :revert
+      put :copy_notes
       get :show_seq
     end
   end