wmde / FundraisingFrontend

'use strict';

/**

 *

 * @module redux_validation

 */

var _ = require( 'underscore' ),

	/**

	 * The dispatcher checks the form content for fields given in the `fields` property.

	 * If they have changed (compared to their equivalent in the `previousFieldValues` property),

	 * the `validationFunction` is called with an object with the selected fields.

	 * If the validation result is not null, it is sent to the store via the `actionCreationFunction`.

	 *

	 * @class ValidationDispatcher

	 */

	ValidationDispatcher = {

		validationFunction: null,

		actionCreationFunction: null,

		fields: null,

		previousFieldValues: {},

		/**

		 *

		 * @param {Object} formValues

		 * @param {Store} store

		 * @returns {*} Action object or null

		 */

		dispatchIfChanged: function ( formValues, store ) {

			var selectedValues = _.pick( formValues, this.fields ),

				validationResult;

			if ( _.isEqual( this.previousFieldValues, selectedValues ) ) {

				return;

			}

			this.previousFieldValues = selectedValues;

			validationResult = this.validationFunction( selectedValues );

			return store.dispatch( this.actionCreationFunction( validationResult ) );

		}

	};

module.exports = ValidationDispatcher;