90 lines
2.3 KiB
JavaScript
90 lines
2.3 KiB
JavaScript
/**
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* Contains concrete RestDataApi class
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*
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* Copyright (C) 2017 R-T Specialty, LLC.
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*
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* This file is part of the Liza Data Collection Framework.
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*
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* liza is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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var Class = require( 'easejs' ).Class,
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DataApi = require( 'liza/dapi/DataApi' ),
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RestDataApiStrategy = require( './RestDataApiStrategy' );
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/**
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* Retrieve data over a RESTful API
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*/
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module.exports = Class( 'RestDataApi' )
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.implement( DataApi )
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.extend(
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{
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/**
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* URL of RESTful service
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* @type {string}
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*/
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'private _url': '',
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/**
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* Strategy used to request data from the service
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* @type {RestDataApiStrategy}
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*/
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'private _strategy': null,
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/**
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* Initialize data API
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*
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* @param {string} url service URL
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* @param {RestDataApiStrategy} strategy request strategy
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*/
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__construct: function( url, strategy )
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{
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if ( !( Class.isA( RestDataApiStrategy, strategy ) ) )
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{
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throw Error(
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'Expected RestDataApiStrategy; given ' + strategy
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);
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}
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this._url = ''+( url );
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this._strategy = strategy;
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},
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/**
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* Request data from the service
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*
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* @param {Object} data request params
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* @param {function(Object)} callback server response callback
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*
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* @return {RestDataApi} self
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*/
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'public request': function( data, callback )
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{
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var _self = this.__inst;
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this._strategy.requestData( this._url, data, function( data )
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{
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// return the data, but bind 'this' to ourself
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callback.call( _self, data );
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} );
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return this;
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}
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} );
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