/* 
 * Copyright 2019 Brainbean Apps (https://brainbeanapps.com)
 * License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
 */
odoo.define('web_widget_dropdown_dynamic.basic_model', function (require) {
    "use strict";

    var BasicModel = require('web.BasicModel');

    BasicModel.include({
        /**
         * Fetches all the values associated to the given fieldName.
         *
         * @param {Object} record - an element from the localData
         * @param {Object} fieldName - the name of the field
         * @param {Object} fieldInfo
         * @returns {Promise<any>}
         *          The promise is resolved with the fetched special values.
         *          If this data is the same as the previously fetched one
         *          (for the given parameters), no RPC is done and the promise
         *          is resolved with the undefined value.
         */
        _fetchDynamicDropdownValues: function (record, fieldName, fieldInfo) {
            var model = fieldInfo.options.model || record.model;
            var method = fieldInfo.values || fieldInfo.options.values;
            if (!method) {
                return $.when();
            }

            var context = record.getContext({fieldName: fieldName});

            // avoid rpc if not necessary
            var hasChanged = this._saveSpecialDataCache(record, fieldName, {
                context: context,
            });
            if (!hasChanged) {
                return $.when();
            }

            return this._rpc({
                model: model,
                method: method,
                context: context,
            });
        },
    });
});