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/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
/**
* @api
*/
define([
'jquery',
'underscore',
'mageUtils',
'uiClass'
], function ($, _, utils, Class) {
'use strict';
return Class.extend({
defaults: {
cacheRequests: true,
cachedRequestDelay: 50,
indexField: 'entity_id',
requestConfig: {
url: '${ $.updateUrl }',
method: 'GET',
dataType: 'json'
},
dataScope: '',
data: {}
},
/**
* Initializes dataStorage configuration.
*
* @returns {DataStorage} Chainable.
*/
initConfig: function () {
var scope;
this._super();
scope = this.dataScope;
if (typeof scope === 'string') {
this.dataScope = scope ? [scope] : [];
}
this._requests = [];
return this;
},
/**
* Extracts data which matches specified set of identifiers.
*
* @param {Array} ids - Records identifiers.
* @returns {Array|Boolean}
*/
getByIds: function (ids) {
var result = [],
hasData;
hasData = ids.every(function (id) {
var item = this.data[id];
return item ? result.push(item) : false;
}, this);
return hasData ? result : false;
},
/**
* Extracts identifiers of provided records.
* If no records were provided then full list of
* current data id's will be returned.
*
* @param {Object|Array} [data=this.data]
* @returns {Array}
*/
getIds: function (data) {
data = data || this.data;
return _.pluck(data, this.indexField);
},
/**
* Extracts data which matches specified parameters.
*
* @param {Object} params - Request parameters.
* @param {Object} [options={}]
* @returns {jQueryPromise}
*/
getData: function (params, options) {
var cachedRequest;
if (this.hasScopeChanged(params)) {
this.clearRequests();
} else {
cachedRequest = this.getRequest(params);
}
options = options || {};
return !options.refresh && cachedRequest ?
this.getRequestData(cachedRequest) :
this.requestData(params);
},
/**
* Tells whether one of the parameters defined in the "dataScope" has
* changed since the last request.
*
* @param {Object} params - Request parameters.
* @returns {Boolean}
*/
hasScopeChanged: function (params) {
var lastRequest = _.last(this._requests),
keys,
diff;
if (!lastRequest) {
return false;
}
diff = utils.compare(lastRequest.params, params);
keys = _.pluck(diff.changes, 'path');
keys = keys.concat(Object.keys(diff.containers));
return _.intersection(this.dataScope, keys).length > 0;
},
/**
* Extends records of current data object
* with the provided records collection.
*
* @param {Array} data - An array of records.
* @returns {DataStorage} Chainable.
*/
updateData: function (data) {
var records = _.indexBy(data || [], this.indexField);
_.extend(this.data, records);
return this;
},
/**
* Sends request to the server with provided parameters.
*
* @param {Object} params - Request parameters.
* @returns {jQueryPromise}
*/
requestData: function (params) {
var query = utils.copy(params),
handler = this.onRequestComplete.bind(this, query),
request;
this.requestConfig.data = query;
request = $.ajax(this.requestConfig).done(handler);
return request;
},
/**
* Returns request's instance which
* contains provided parameters.
*
* @param {Object} params - Request parameters.
* @returns {Object} Instance of request.
*/
getRequest: function (params) {
return _.find(this._requests, function (request) {
return _.isEqual(params, request.params);
}, this);
},
/**
* Forms data object associated with provided request.
*
* @param {Object} request - Request object.
* @returns {jQueryPromise}
*/
getRequestData: function (request) {
var defer = $.Deferred(),
resolve = defer.resolve.bind(defer),
delay = this.cachedRequestDelay,
result;
if (request.showTotalRecords === undefined) {
request.showTotalRecords = true;
}
result = {
items: this.getByIds(request.ids),
totalRecords: request.totalRecords,
showTotalRecords: request.showTotalRecords,
errorMessage: request.errorMessage
};
delay ?
_.delay(resolve, delay, result) :
resolve(result);
return defer.promise();
},
/**
* Caches requests object with provided parameters
* and data object associated with it.
*
* @param {Object} data - Data associated with request.
* @param {Object} params - Request parameters.
* @returns {DataStorage} Chainable.
*/
cacheRequest: function (data, params) {
var cached = this.getRequest(params);
if (cached) {
this.removeRequest(cached);
}
if (data.showTotalRecords === undefined) {
data.showTotalRecords = true;
}
this._requests.push({
ids: this.getIds(data.items),
params: params,
totalRecords: data.totalRecords,
showTotalRecords: data.showTotalRecords,
errorMessage: data.errorMessage
});
return this;
},
/**
* Clears all cached requests.
*
* @returns {DataStorage} Chainable.
*/
clearRequests: function () {
this._requests.splice(0);
return this;
},
/**
* Removes provided request object from cached requests list.
*
* @param {Object} request - Request object.
* @returns {DataStorage} Chainable.
*/
removeRequest: function (request) {
var requests = this._requests,
index = requests.indexOf(request);
if (~index) {
requests.splice(index, 1);
}
return this;
},
/**
* Checks if request with a specified parameters was cached.
*
* @param {Object} params - Parameters of the request.
* @returns {Boolean}
*/
wasRequested: function (params) {
return !!this.getRequest(params);
},
/**
* Handles successful data request.
*
* @param {Object} params - Request parameters.
* @param {Object} data - Response data.
*/
onRequestComplete: function (params, data) {
this.updateData(data.items);
if (this.cacheRequests) {
this.cacheRequest(data, params);
}
}
});
});