AO3-5386 Remove edit_emails_off and plain_text_skin columns from pref…

…erences table (#4540)

* add migration to remove columns from preferences and remove mentions of those columns from preferences.yml

* hound

db/migrate/20230418071728_remove_edit_emails_and_plain_text_skin_from_preferences.rb

@@ -0,0 +1,53 @@
+class RemoveEditEmailsAndPlainTextSkinFromPreferences < ActiveRecord::Migration[6.1]
+  def up
+    if Rails.env.staging? || Rails.env.production?
+      database = Preference.connection.current_database
+
+      puts <<~PTOSC
+        Schema Change Command:
+
+        pt-online-schema-change D=#{database},t=preferences \\
+          --alter "DROP COLUMN edit_emails_off,
+                   DROP COLUMN plain_text_skin" \\
+          --no-drop-old-table \\
+          -uroot --ask-pass --chunk-size=5k --max-flow-ctl 0 --pause-file /tmp/pauseme \\
+          --max-load Threads_running=15 --critical-load Threads_running=100 \\
+          --set-vars innodb_lock_wait_timeout=2 --alter-foreign-keys-method=auto \\
+          --execute
+
+        Table Deletion Command:
+
+        DROP TABLE IF EXISTS `#{database}`.`_preferences_old`;
+      PTOSC
+    else
+      remove_column :preferences, :edit_emails_off
+      remove_column :preferences, :plain_text_skin
+    end
+  end
+
+  def down
+    if Rails.env.staging? || Rails.env.production?
+      database = Preference.connection.current_database
+
+      puts <<~PTOSC
+        Schema Change Command:
+
+        pt-online-schema-change D=#{database},t=preferences \\
+          --alter "ADD COLUMN edit_emails_off BOOLEAN NOT NULL DEFAULT 0,
+                   ADD COLUMN plain_text_skin BOOLEAN NOT NULL DEFAULT 0" \\
+          --no-drop-old-table \\
+          -uroot --ask-pass --chunk-size=5k --max-flow-ctl 0 --pause-file /tmp/pauseme \\
+          --max-load Threads_running=15 --critical-load Threads_running=100 \\
+          --set-vars innodb_lock_wait_timeout=2 --alter-foreign-keys-method=auto \\
+          --execute
+
+        Table Deletion Command:
+
+        DROP TABLE IF EXISTS `#{database}`.`_preferences_old`;
+      PTOSC
+    else
+      add_column :preferences, :edit_emails_off, :boolean, default: false, null: false
+      add_column :preferences, :plain_text_skin, :boolean, default: false, null: false
+    end
+  end
+end