2b9ef0b0
 Renato De Donato
JSDarkSide
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/*
** This file is part of JSDataChecker.
**
** JSDataChecker 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.
**
** JSDataChecker 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 JSDataChecker. If not, see <http://www.gnu.org/licenses/>.
**
** Copyright (C) 2016 JSDataChecker - 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
**/
//This JS class allows the connection to a ckan platform.
function CKANApi() {
}//EndFunction.
CKANApi.prototype = (function() {
var httpGetAsync = function(theUrl, callback, errorCallback) {
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (xhttp.readyState == 4 && xhttp.status == 200)
callback(xhttp.responseText);
};
xhttp.onerror = function (XMLHttpRequest, textStatus, errorThrown) {
console.log( 'The data failed to load :(' );
if (typeof errorCallback !== 'undefined')
errorCallback("Check DataStoreAPI.");
};
xhttp.open("GET", theUrl, true);//true for asynchronous.
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2b9ef0b0
Renato De Donato
JSDarkSide
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xhttp.send(null);
};//EndFunction.
/*var _processListOfDataset = function(requestContent) {
var jsonContent = JSON.parse(requestContent);
if (jsonContent.success == false) return;
var ckanresults = jsonContent.result.results;
var datasetsCSV = [];
var arrFormatsSummary = [];
for (var i=0; i<ckanresults.length; i++) {
var result = ckanresults[i];
var resources = result.resources;
for (var j=0; j<resources.length; j++) {
var resource = resources[j];
var resourceFormat = resource.format;
_arrUtil.testAndIncrement(arrFormatsSummary, resourceFormat);
if (resourceFormat == "CSV")
datasetsCSV.push({ id: resource.id, description: resource.description, url: resource.url });
//debugger;
}
}//EndFor.
console.log("...");
};//EndFunction.*/
var _retrieveListOfDatasets = function(baseUrl, userCallback) {
httpGetAsync(baseUrl, function(responseText) {
var datasets = [];
var jsonResponse = JSON.parse(responseText);
var jsonResults = jsonResponse.result.results;
for (var i=0; i<jsonResults.length; i++) {
var jsonResult = jsonResults[i];
var jsonResources = jsonResult.resources;
for (var j=0; j<jsonResources.length; j++) {
var jsonResource = jsonResources[j];
var idx = baseUrl.indexOf("/api");
var pageUrl = baseUrl.substring(0, idx) + "/dataset/" + jsonResult.name + "/resource/" + jsonResource.id;
datasets.push({ id: jsonResource.id, name: jsonResource.name, format: jsonResource.format,
url: jsonResource.url, pageUrl: pageUrl });
}//EndForJ.
}//EndForI.
userCallback(datasets);
});
};//EndFunction.
//PUBLIC CLASS CONTENT.
return {
constructor: CKANApi,
listDatasets: function (baseUrl, userCallback) {
var apiListDataset = baseUrl + "/api/3/action/package_search" + "?rows=10000";
_retrieveListOfDatasets(apiListDataset, userCallback)
},//EndFunction.
retrieveDataset: function (baseUrl, datasetId, userCallback) {
var linkDataset = baseUrl + "/api/action/datastore_search?resource_id=" + datasetId;
httpGetAsync(linkDataset, function(responseContent) {
var jsonResponseCKAN = JSON.parse(responseContent);
var numOfRows = jsonResponseCKAN.result.total;
var numOfCols = jsonResponseCKAN.result.fields.length;
var record = { error: false, original: jsonResponseCKAN, numOfRows: numOfRows, numOfCols: numOfCols };
userCallback(record);
}, function (errMsg) {
var record = { error: true, errorMessage: errMsg };
userCallback(record);
});
}//EndFunction
};
})();
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