Add support for editing for published statuses (#16697)

* Add support for editing for published statuses

* Fix references to stripped-out code

* Various fixes and improvements

* Further fixes and improvements

* Fix updates being potentially sent to unauthorized recipients

* Various fixes and improvements

* Fix wrong words in test

* Fix notifying accounts that were tagged but were not in the audience

* Fix mistake

app/models/poll.rb

@@ -26,6 +26,7 @@ class Poll < ApplicationRecord
   belongs_to :status
 
   has_many :votes, class_name: 'PollVote', inverse_of: :poll, dependent: :delete_all
+  has_many :voters, -> { group('accounts.id') }, through: :votes, class_name: 'Account', source: :account
 
   has_many :notifications, as: :activity, dependent: :destroy
 

app/models/status.rb

@@ -23,6 +23,7 @@
 #  in_reply_to_account_id :bigint(8)
 #  poll_id                :bigint(8)
 #  deleted_at             :datetime
+#  edited_at              :datetime
 #
 
 class Status < ApplicationRecord
@@ -56,6 +57,8 @@ class Status < ApplicationRecord
   belongs_to :thread, foreign_key: 'in_reply_to_id', class_name: 'Status', inverse_of: :replies, optional: true
   belongs_to :reblog, foreign_key: 'reblog_of_id', class_name: 'Status', inverse_of: :reblogs, optional: true
 
+  has_many :edits, class_name: 'StatusEdit', inverse_of: :status, dependent: :destroy
+
   has_many :favourites, inverse_of: :status, dependent: :destroy
   has_many :bookmarks, inverse_of: :status, dependent: :destroy
   has_many :reblogs, foreign_key: 'reblog_of_id', class_name: 'Status', inverse_of: :reblog, dependent: :destroy
@@ -209,6 +212,10 @@ class Status < ApplicationRecord
     public_visibility? || unlisted_visibility?
   end
 
+  def edited?
+    edited_at.present?
+  end
+
   alias sign? distributable?
 
   def with_media?

app/models/status_edit.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+# == Schema Information
+#
+# Table name: status_edits
+#
+#  id                        :bigint(8)        not null, primary key
+#  status_id                 :bigint(8)        not null
+#  account_id                :bigint(8)
+#  text                      :text             default(""), not null
+#  spoiler_text              :text             default(""), not null
+#  media_attachments_changed :boolean          default(FALSE), not null
+#  created_at                :datetime         not null
+#  updated_at                :datetime         not null
+#
+
+class StatusEdit < ApplicationRecord
+  belongs_to :status
+  belongs_to :account, optional: true
+
+  default_scope { order(id: :asc) }
+
+  delegate :local?, to: :status
+end