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

db/migrate/20210904215403_add_edited_at_to_statuses.rb

@@ -0,0 +1,5 @@
+class AddEditedAtToStatuses < ActiveRecord::Migration[6.1]
+  def change
+    add_column :statuses, :edited_at, :datetime
+  end
+end

db/migrate/20210908220918_create_status_edits.rb

@@ -0,0 +1,13 @@
+class CreateStatusEdits < ActiveRecord::Migration[6.1]
+  def change
+    create_table :status_edits do |t|
+      t.belongs_to :status, null: false, foreign_key: { on_delete: :cascade }
+      t.belongs_to :account, null: true, foreign_key: { on_delete: :nullify }
+      t.text :text, null: false, default: ''
+      t.text :spoiler_text, null: false, default: ''
+      t.boolean :media_attachments_changed, null: false, default: false
+
+      t.timestamps
+    end
+  end
+end

db/schema.rb

@@ -816,6 +816,18 @@ ActiveRecord::Schema.define(version: 2022_01_16_202951) do
     t.index ["var"], name: "index_site_uploads_on_var", unique: true
   end
 
+  create_table "status_edits", force: :cascade do |t|
+    t.bigint "status_id", null: false
+    t.bigint "account_id"
+    t.text "text", default: "", null: false
+    t.text "spoiler_text", default: "", null: false
+    t.boolean "media_attachments_changed", default: false, null: false
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+    t.index ["account_id"], name: "index_status_edits_on_account_id"
+    t.index ["status_id"], name: "index_status_edits_on_status_id"
+  end
+
   create_table "status_pins", force: :cascade do |t|
     t.bigint "account_id", null: false
     t.bigint "status_id", null: false
@@ -854,6 +866,7 @@ ActiveRecord::Schema.define(version: 2022_01_16_202951) do
     t.bigint "in_reply_to_account_id"
     t.bigint "poll_id"
     t.datetime "deleted_at"
+    t.datetime "edited_at"
     t.index ["account_id", "id", "visibility", "updated_at"], name: "index_statuses_20190820", order: { id: :desc }, where: "(deleted_at IS NULL)"
     t.index ["deleted_at"], name: "index_statuses_on_deleted_at", where: "(deleted_at IS NOT NULL)"
     t.index ["id", "account_id"], name: "index_statuses_local_20190824", order: { id: :desc }, where: "((local OR (uri IS NULL)) AND (deleted_at IS NULL) AND (visibility = 0) AND (reblog_of_id IS NULL) AND ((NOT reply) OR (in_reply_to_account_id = account_id)))"
@@ -1081,6 +1094,8 @@ ActiveRecord::Schema.define(version: 2022_01_16_202951) do
   add_foreign_key "scheduled_statuses", "accounts", on_delete: :cascade
   add_foreign_key "session_activations", "oauth_access_tokens", column: "access_token_id", name: "fk_957e5bda89", on_delete: :cascade
   add_foreign_key "session_activations", "users", name: "fk_e5fda67334", on_delete: :cascade
+  add_foreign_key "status_edits", "accounts", on_delete: :nullify
+  add_foreign_key "status_edits", "statuses", on_delete: :cascade
   add_foreign_key "status_pins", "accounts", name: "fk_d4cb435b62", on_delete: :cascade
   add_foreign_key "status_pins", "statuses", on_delete: :cascade
   add_foreign_key "status_stats", "statuses", on_delete: :cascade