ODSApi.js
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/*
** This file is part of ChartViz.
**
** ChartViz is free software: you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation, either version 3 of the License, or
** (at your option) any later version.
**
** ChartViz is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with ChartViz. If not, see <http://www.gnu.org/licenses/>.
**
** Copyright (C) 2016 ChartViz - Donato Pirozzi (donatopirozzi@gmail.com)
** Distributed under the GNU GPL v3. For full terms see the file LICENSE.
** License: http://www.gnu.org/licenses/gpl.html GPL version 3 or higher
**/
function ODSApi() {
}
ODSApi.prototype = (function() {
var _arrUtil = new ArrayUtils();
var httpGetAsync = function(theUrl, callback, callbackOnFinish) {
//var asynch = typeof asynch === 'undefined' ? true : asynch;
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (xhttp.readyState == 4 && xhttp.status == 200)
callback(theUrl, xhttp.responseText, callbackOnFinish);
};
xhttp.open("GET", theUrl, true);//true for asynchronous.
xhttp.send(null);
};//EndFunction.
var _processListOfDataset = function(baseUrl, requestContent, callbackOnFinish) {
var jsonContent = JSON.parse(requestContent);
var jsonDatasets = jsonContent.datasets;
var resultDatasets = [];
for (var i=0; i<jsonDatasets.length; i++) {
var jsonDataset = jsonDatasets[i];
var _title = jsonDataset.metas.title;
var _datasetId = jsonDataset.datasetid;
var _datasetUrl = "/api/records/1.0/search/?rows=1000&dataset=" + _datasetId;
var ds = { id: _datasetId, title: _title, url: _datasetUrl };
ds.fields = jsonDataset.fields;
resultDatasets.push(ds);
}
callbackOnFinish(resultDatasets);
};//EndFunction.
var _processDataset = function (dataset, requestContent, callbackOnFinish) {
var jsonContent = JSON.parse(requestContent);
var records = jsonContent.records;
if (typeof dataset !== 'undefined') {
dataset.rows = [];
for (var i=0; i<records.length; i++) {
var record = records[i];
dataset.rows.push(record.fields);
}//EndFor.
}
callbackOnFinish(dataset);
};//EndFunction.
return {
constructor: ODSApi,
listDatasets: function (theUrl, callbackOnFinish) {
theUrl = theUrl + "/api/datasets/1.0/search/?rows=-1";
httpGetAsync(theUrl, _processListOfDataset, callbackOnFinish);
},//EndFunction.
/*requestDataset: function (theUrl, callbackOnFinish) {
httpGetAsync(theUrl, _processDataset, callbackOnFinish);
}//EndFunction.*/
requestDataset: function (urlDomain, dataset, callbackOnFinish) {
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (xhttp.readyState == 4 && xhttp.status == 200)
_processDataset(dataset, xhttp.responseText, callbackOnFinish);
};
xhttp.open("GET", urlDomain + dataset.url, true);//true for asynchronous.
xhttp.send(null);
}//EndFunction.
};
})();