awsmug/torro-forms

( function( torroBuilder, torro, _, Backbone ) {
    'use strict';

    /**
     * Base for a form builder model.
     *
     * This model has no persistence with the server.
     *
     * @class
     * @augments Backbone.Model
     */
    torroBuilder.BaseModel = Backbone.Model.extend({

        /**
         * Related REST links.
         *
         * @since 1.0.0
         * @access public
         * @type {object}
         */
        links: {},

        /**
         * Instantiates a new model.
         *
         * Overrides constructor in order to strip out unnecessary attributes.
         *
         * @since 1.0.0
         * @access public
         *
         * @param {object} [attributes] Model attributes.
         * @param {object} [options]    Options for the model behavior.
         */
        constructor: function( attributes, options ) {
            var attrs = attributes || {};
            var idAttribute = this.idAttribute || Backbone.Model.prototype.idAttribute || 'id';

            if ( attrs._links ) {
                this.links = attrs._links;
            }

            attrs = _.omit( attrs, [ '_links', '_embedded' ] );

            if ( ! attrs[ idAttribute ] ) {
                attrs[ idAttribute ] = torro.generateTempId();
            }

            Backbone.Model.apply( this, [ attrs, options ] );
        },

        /**
         * Synchronizes the model with the server.
         *
         * Overrides synchronization in order to disable synchronization.
         *
         * @since 1.0.0
         * @access public
         *
         * @returns {boolean} True on success, false on failure.
         */
        sync: function( method, model, options ) {
            if ( 'create' === method && model.has( model.idAttribute ) ) {
                if ( ! options.attrs ) {
                    options.attrs = model.toJSON( options );
                }

                options.attrs = _.omit( options.attrs, model.idAttribute );
            }

            return false;
        },

        /**
         * Checks whether this model is new.
         *
         * @since 1.0.0
         * @access public
         *
         * @return {boolean} True if the model is new, false otherwise.
         */
        isNew: function() {
            return ! this.has( this.idAttribute ) || torro.isTempId( this.get( this.idAttribute ) );
        }
    });

})( window.torro.Builder, window.torro, window._, window.Backbone );