149 lines
3.6 KiB
JavaScript
149 lines
3.6 KiB
JavaScript
/**
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* Contains JqueryHttpDataProxy
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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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* @todo This is a deprecated system; remove.
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*/
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var Class = require( 'easejs' ).Class,
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HttpDataProxy = require( './HttpDataProxy' );
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module.exports = Class( 'JqueryHttpDataProxy' )
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.extend( HttpDataProxy,
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{
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/**
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* jQuery object to use
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* @type {jQuery}
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*/
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'private _jquery': null,
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/**
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* Pool of outstanding requests
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* @type {Array.<XMLHttpRequest>}
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*/
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'private _requestPool': [],
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/**
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* Initializes data proxy with the given jQuery object
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*
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* The jQuery object is injected to both decouple the two and to make it
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* stubbable for tests
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*
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* @param {jQuery} jquery jQuery object
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*
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* @return {undefined}
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*/
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'public __construct': function( jquery )
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{
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if ( !( jquery ) )
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{
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throw Error( 'No jQuery instance provided' );
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}
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this._jquery = jquery;
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},
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'private _doXhr': function( url, callback, type, data )
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{
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callback = callback || function() {};
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var _self = this,
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pool_pos = -1,
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done = false,
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xhr = this._jquery.ajax( {
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type: type,
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data: data,
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url: url,
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dataType: 'json',
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success: function( data )
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{
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_self._removeFromPool( pool_pos );
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callback( data || {}, null );
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done = true;
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},
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error: function( xhr, text_status )
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{
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_self._removeFromPool( pool_pos );
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callback( null, text_status );
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done = true;
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}
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} );
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// add request to the pool, only for async requests
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if ( !done )
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{
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pool_pos = ( this._requestPool.push( xhr ) - 1 );
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}
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},
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'virtual protected getData': function( url, callback )
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{
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this._doXhr( url, callback, 'GET' );
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},
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'virtual protected postData': function( url, data, callback )
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{
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this._doXhr( url, callback, 'POST', data );
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},
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'private _removeFromPool': function( pos )
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{
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// if the position is -1, then the pool wasn't yet created
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if ( pos === -1 )
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{
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return;
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}
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delete this._requestPool[ pos ];
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},
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'abortAll': function()
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{
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var i = this._requestPool.length;
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while ( i-- )
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{
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var xhr = this._requestPool[ i ];
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// will be undefined if it finished
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if ( xhr === undefined )
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{
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continue;
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}
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xhr.abort();
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}
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// remove 'em all from memory and start with a fresh array
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this.requestPool = [];
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}
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});
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