Rocket.Chat/server/startup/migrations/v014.js

RocketChat.Migrations.add({
	version: 14,
	up() {
		// Remove unused settings
		RocketChat.models.Settings.remove({_id: 'API_Piwik_URL'});
		RocketChat.models.Settings.remove({_id: 'API_Piwik_ID'});
		RocketChat.models.Settings.remove({_id: 'Message_Edit'});
		RocketChat.models.Settings.remove({_id: 'Message_Delete'});
		RocketChat.models.Settings.remove({_id: 'Message_KeepStatusHistory'});

		RocketChat.models.Settings.update({_id: 'Message_ShowEditedStatus'}, {
			$set: {
				type: 'boolean',
				value: true
			}
		});

		RocketChat.models.Settings.update({_id: 'Message_ShowDeletedStatus'}, {
			$set: {
				type: 'boolean',
				value: false
			}
		});

		const metaKeys = [
			{
				old: 'Meta:language',
				new: 'Meta_language'
			}, {
				old: 'Meta:fb:app_id',
				new: 'Meta_fb_app_id'
			}, {
				old: 'Meta:robots',
				new: 'Meta_robots'
			}, {
				old: 'Meta:google-site-verification',
				new: 'Meta_google-site-verification'
			}, {
				old: 'Meta:msvalidate.01',
				new: 'Meta_msvalidate01'
			}
		];

		for (const oldAndNew of metaKeys) {
			const oldSetting = RocketChat.models.Settings.findOne({_id: oldAndNew.old});
			const oldValue = oldSetting && oldSetting.value;

			const newSetting = RocketChat.models.Settings.findOne({_id: oldAndNew.new});
			const newValue = newSetting && newSetting.value;

			if (oldValue && newValue) {
				RocketChat.models.Settings.update({
					_id: oldAndNew.new
				}, {
					$set: {
						value: newValue
					}
				});
			}

			RocketChat.models.Settings.remove({
				_id: oldAndNew.old
			});
		}

		RocketChat.models.Settings.remove({
			_id: 'SMTP_Security'
		});
	}
});