Fix #4178: add ability to mass undo tag edits.

Adds checkboxes to the /post_versions index allowing you to select and
undo multiple versions at once.

app/controllers/post_versions_controller.rb

@@ -2,8 +2,10 @@ class PostVersionsController < ApplicationController
   before_action :member_only, except: [:index, :search]
   before_action :check_availabililty
   respond_to :html, :xml, :json
+  respond_to :js, only: [:undo]
 
   def index
+    # XXX statement timeouts
     @post_versions = PostArchive.includes(:updater, post: [:versions]).search(search_params).paginate(params[:page], :limit => params[:limit], :search_count => params[:search])
     respond_with(@post_versions)
   end
@@ -13,14 +15,9 @@ class PostVersionsController < ApplicationController
 
   def undo
     @post_version = PostArchive.find(params[:id])
+    @post_version.undo!
 
-    if @post_version.post.visible?
-      @post_version.undo!
-    end
-
-    respond_with(@post_version) do |format|
-      format.js
-    end
+    respond_with(@post_version)
   end
 
   private

app/javascript/packs/application.js

@@ -36,6 +36,7 @@ export { default as Note } from '../src/javascripts/notes.js';
 export { default as Post } from '../src/javascripts/posts.js.erb';
 export { default as PostModeMenu } from '../src/javascripts/post_mode_menu.js';
 export { default as PostTooltip } from '../src/javascripts/post_tooltips.js';
+export { default as PostVersion } from '../src/javascripts/post_version.js';
 export { default as RelatedTag } from '../src/javascripts/related_tag.js';
 export { default as Shortcuts } from '../src/javascripts/shortcuts.js';
 export { default as Upload } from '../src/javascripts/uploads.js.erb';

app/javascript/src/javascripts/post_version.js

@@ -0,0 +1,45 @@
+import Utility from './utility';
+
+let PostVersion = {};
+
+PostVersion.initialize_all = function() {
+  if ($("#c-post-versions #a-index").length) {
+    PostVersion.initialize_undo();
+  }
+};
+
+PostVersion.initialize_undo = function() {
+  /* Expand the clickable area of the checkbox to the entire table cell. */
+  $(".post-version-select-column").on("click.danbooru", function(event) {
+    $(event.target).find(".post-version-select-checkbox:not(:disabled)").prop("checked", (_, checked) => !checked).change();
+  });
+
+  $("#post-version-select-all-checkbox").on("change.danbooru", function(event) {
+    $("td .post-version-select-checkbox:not(:disabled)").prop("checked", $("#post-version-select-all-checkbox").prop("checked")).change();
+  });
+
+  $(".post-version-select-checkbox").on("change.danbooru", function(event) {
+    let checked = $("td .post-version-select-checkbox:checked");
+    $("#subnav-undo-selected-link").text(`Undo selected (${checked.length})`).toggle(checked.length > 0);
+  });
+
+  $("#subnav-undo-selected-link").on("click.danbooru", PostVersion.undo_selected);
+};
+
+PostVersion.undo_selected = async function () {
+  event.preventDefault();
+
+  let updated = 0;
+  let selected_rows = $("td .post-version-select-checkbox:checked").parents("tr");
+
+  for (let row of selected_rows) {
+    let id = $(row).data("post-version-id");
+    await $.ajax(`/post_versions/${id}/undo.json`, { method: "PUT" });
+
+    updated++;
+    Utility.notice(`${updated}/${selected_rows.length} changes undone.`);
+  }
+};
+
+$(document).ready(PostVersion.initialize_all);
+export default PostVersion;

app/javascript/src/styles/specific/post_versions.scss

@@ -0,0 +1,9 @@
+body.c-post-versions.a-index {
+  #subnav-undo-selected-link {
+    display: none;
+  }
+
+  .post-version-select-column {
+    min-width: 2em;
+  }
+}

app/models/post_archive.rb

@@ -1,4 +1,5 @@
 class PostArchive < ApplicationRecord
+  class RevertError < Exception ; end
   extend Memoist
 
   belongs_to :post
@@ -218,7 +219,9 @@ class PostArchive < ApplicationRecord
     source.gsub(/^http:\/\//, "").sub(/\/.+/, "")
   end
 
-  def undo
+  def undo!
+    raise RevertError unless post.visible?
+
     added = changes[:added_tags] - changes[:obsolete_added_tags]
     removed = changes[:removed_tags] - changes[:obsolete_removed_tags]
 
@@ -239,11 +242,16 @@ class PostArchive < ApplicationRecord
         post.tag_string = "#{post.tag_string} #{tag}".strip
       end
     end
+
+    post.save!
   end
 
-  def undo!
-    undo
-    post.save!
+  def can_undo?(user)
+    version > 1 && post&.visible? && user.is_member?
+  end
+
+  def can_revert_to?(user)
+    post&.visible? && user.is_member?
   end
 
   def updater_name

app/views/post_versions/_revert_listing.html.erb

@@ -2,6 +2,11 @@
   <table class="striped autofit">
     <thead>
       <tr>
+        <% if CurrentUser.user.is_builder? %>
+          <th class="post-version-select-column">
+            <label><input type="checkbox" id="post-version-select-all-checkbox" class="post-version-select-checkbox"></label>
+          </th>
+        <% end %>
         <th width="5%">Post</th>
         <th width="15%">Date</th>
         <th width="10%">User</th>
@@ -18,7 +23,12 @@
     </thead>
     <tbody>
       <% @post_versions.each do |post_version| %>
-        <tr id="post-version-<%= post_version.id %>">
+        <tr id="post-version-<%= post_version.id %>" data-post-version-id="<%= post_version.id %>">
+          <% if CurrentUser.user.is_builder? %>
+            <td class="post-version-select-column">
+              <input type="checkbox" class="post-version-select-checkbox" <%= "disabled" unless post_version.can_undo?(CurrentUser.user) %>>
+            </td>
+          <% end %>
           <td><%= link_to("#{post_version.post_id}.#{post_version.id}", post_path(post_version.post_id)) %></td>
           <td><%= compact_time(post_version.updated_at) %></td>
           <td>
@@ -34,16 +44,14 @@
             </td>
           <% end %>
           <td class="col-expand"><%= post_version_diff(post_version) %></td>
-          <% if CurrentUser.is_member? %>
-            <td>
-              <% if post_version.visible? %>
-                <% if post_version.version != 1 %>
-                  <%= link_to "Undo", undo_post_version_path(post_version), :method => :put, :remote => true %> |
-                <% end %>
-                <%= link_to "Revert to", revert_post_path(post_version.post_id, :version_id => post_version.id), :method => :put, :remote => true %>
-              <% end %>
-            </td>
-          <% end %>
+          <td>
+            <% if post_version.can_undo?(CurrentUser.user) %>
+              <%= link_to "Undo", undo_post_version_path(post_version), method: :put, remote: true, class: "post-version-undo-link" %> |
+            <% end %>
+            <% if post_version.can_revert_to?(CurrentUser.user) %>
+              <%= link_to "Revert to", revert_post_path(post_version.post_id, version_id: post_version.id), method: :put, remote: true %>
+            <% end %>
+          </td>
         </tr>
       <% end %>
     </tbody>

app/views/post_versions/_secondary_links.html.erb

@@ -4,4 +4,7 @@
   <%= subnav_link_to "Search", search_post_versions_path %>
   <%= subnav_link_to "Changes", post_versions_path %>
   <%= subnav_link_to "Help", wiki_pages_path(:title => "help:posts") %>
+  <% if params[:action] == "index" %>
+    | <%= subnav_link_to "Undo selected", "" %>
+  <% end %>
 <% end %>

app/views/post_versions/_standard_listing.html.erb

@@ -2,6 +2,11 @@
   <table class="striped autofit">
     <thead>
       <tr>
+        <% if CurrentUser.user.is_builder? %>
+          <th class="post-version-select-column">
+            <label><input type="checkbox" id="post-version-select-all-checkbox" class="post-version-select-checkbox"></label>
+          </th>
+        <% end %>
         <th width="5%">Post</th>
         <th width="15%">Date</th>
         <th width="10%">User</th>
@@ -18,7 +23,12 @@
     </thead>
     <tbody>
       <% @post_versions.each do |post_version| %>
-        <tr id="post-version-<%= post_version.id %>">
+        <tr id="post-version-<%= post_version.id %>" data-post-version-id="<%= post_version.id %>">
+          <% if CurrentUser.user.is_builder? %>
+            <td class="post-version-select-column">
+              <input type="checkbox" class="post-version-select-checkbox" <%= "disabled" unless post_version.can_undo?(CurrentUser.user) %>>
+            </td>
+          <% end %>
           <td>
             <%= link_to("#{post_version.post_id}.#{post_version.id}", post_path(post_version.post_id)) %>
             <%= link_to "»", post_versions_path(search: {post_id: post_version.post_id}) %>
@@ -37,18 +47,13 @@
             </td>
           <% end %>
           <td class="col-expand"><%= post_version_diff(post_version) %></td>
-          <% if CurrentUser.is_member? %>
-            <td>
-              <% if post_version.visible? %>
-                <% if post_version.version != 1 %>
-                  <%= link_to "Undo", undo_post_version_path(post_version), :method => :put, :remote => true %>
-                <% end %>
-              <% end %>
-            </td>
-          <% end %>
+          <td>
+            <% if post_version.can_undo?(CurrentUser.user) %>
+              <%= link_to "Undo", undo_post_version_path(post_version), method: :put, remote: true, class: "post-version-undo-link" %>
+            <% end %>
+          </td>
         </tr>
       <% end %>
     </tbody>
   </table>
 </div>
-

app/views/post_versions/undo.js.erb

@@ -1 +1 @@
-location.reload();
+Danbooru.Utility.notice("1 change undone.");

test/system/post_version_test.rb

@@ -0,0 +1,33 @@
+require "application_system_test_case"
+
+class PostVersionTest < ApplicationSystemTestCase
+  context "Post versions" do
+    setup do
+      @user = create(:builder_user)
+
+      as @user do
+        @post = create(:post, tag_string: "tagme")
+        travel 2.hours
+        @post.update!(tag_string: "touhou")
+        travel 2.hours
+        @post.update!(tag_string: "touhou bkub")
+        travel 2.hours
+      end
+
+      signin @user
+      visit post_versions_path
+    end
+
+    context "clicking the undo selected button" do
+      should "undo all selected post versions" do
+        check id: "post-version-select-all-checkbox"
+        assert all("td .post-version-select-checkbox:not(:disabled)").all?(&:checked?)
+
+        click_link "subnav-undo-selected-link"
+        assert_selector "#notice span.prose", text: "2/2 changes undone."
+
+        assert_equal("tagme", @post.reload.tag_string)
+      end
+    end
+  end
+end

test/test_helpers/system_test_helper.rb

@@ -6,4 +6,11 @@ module SystemTestHelper
     fill_in "Password confirmation", with: password
     click_button "Sign up"
   end
+
+  def signin(user)
+    visit new_session_path
+    fill_in "Name", with: user.name
+    fill_in "Password", with: user.password
+    click_button "Submit"
+  end
 end