analytics/webcontent/bi/js/dashboard-analytics/drill-through/controls/DrillThroughManageUndoRedo.js

'use strict';

/**
 * Licensed Materials - Property of IBM
 * IBM Watson Analytics (C) Copyright IBM Corp. 2018
 * US Government Users Restricted Rights - Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
 *
 */
define(['../../lib/@waca/core-client/js/core-client/ui/core/Class', '../../lib/@waca/core-client/js/core-client/utils/UniqueId'], function (Class, UniqueId) {

	/**
 * Handles undo/redo and rollback drill through model if users cancel editing in the manage dialog
 */
	var DrillThroughUndoRedoTransaction = Class.extend({
		init: function init(options) {
			options = options || {};
			this._drillThroughModelApi = options.drillThroughModelApi;
		},

		/**
   * silently apply the undo/redo payload to the model to restore a previous state
   * @param undoRedoValue - the value passed to onModelChange when an undo or redo occurs.
   */
		applyUndoRedo: function applyUndoRedo(payload, prevValue, sender, name, context) {
			if (sender === 'UndoRedoController' && name === 'reset') {
				var value = context.undoRedoTransactionType === 'undo' ? payload.prevValue : payload.value;
				this._drillThroughModelApi.applyModelChange(value, { silent: true });
			}
		},

		rollback: function rollback(transactionInfo) {
			if (transactionInfo.transactionId === this._mainTransaction) {
				transactionInfo.options.silent = true;
				this._drillThroughModelApi.applyModelChange(this.callbackPayload.prevValue, transactionInfo.options);
			}
		},

		startTransaction: function startTransaction(prefix, options, transactionArgs, transactionType) {
			var startStart = Date.now();
			this._transactionType = transactionType || this.TRANSACTION_TYPE_DEFAULT;
			this._transactionArgs = transactionArgs || {};

			// If a transaction id provided in the transactionArgs, then use it.
			var transactionId = transactionArgs && transactionArgs.transactionId || UniqueId.get(prefix);

			if (!this._mainTransaction && !this._transactionInProgress(options)) {
				options = options || {};
				options.payloadData = options.payloadData || {};
				this._mainTransaction = transactionId;
				options.payloadData.undoRedoTransactionId = this._mainTransaction;
				options.silent = true;
				this.callbackPayload = {
					//Make a clone
					prevValue: JSON.parse(JSON.stringify(this._drillThroughModelApi.toJSON()))
				};
			} else {
				options.silent = true;
			}
			return {
				startStart: startStart,
				startEnd: Date.now(),
				options: options,
				transactionId: transactionId
			};
		},

		_transactionInProgress: function _transactionInProgress(options) {
			return options && options.payloadData && options.payloadData.undoRedoTransactionId;
		},

		endTransaction: function endTransaction(transactionInfo) {
			if (transactionInfo.transactionId === this._mainTransaction) {
				//var endStart=Date.now();
				transactionInfo.options.silent = false;
				var newValue = this._drillThroughModelApi.toJSON();
				this.callbackPayload.value = newValue;
				transactionInfo.options = transactionInfo.options || {};
				transactionInfo.options.sender = 'DrillThroughTransaction';
				transactionInfo.options.senderContext = {
					applyFn: this.applyUndoRedo.bind(this, this.callbackPayload)
				};

				this._drillThroughModelApi.applyModelChange(newValue, transactionInfo.options);
			}
		}
	});

	return DrillThroughUndoRedoTransaction;
});
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