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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
**/
function ODStatistics() {
}//EndFunction.
ODStatistics.prototype = (function() {
var httpGetAsync = function(theUrl, callback) {
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 :(' );
console.log(JSON.stringify(XMLHttpRequest));
};
xhttp.open("GET", theUrl, true);//true for asynchronous.
xhttp.send(null);
};//EndFunction.
var _downloadDataset = function() {
};//EndFunction.
/**
* Retrieves the formats of all datasets.
* @param datasets
* @returns {{}}
* @private
*/
var _analyseFormats = function(datasets) {
var stats = {};
stats.numOfDatasets = datasets.length;
stats.formats = [];
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stats.formatsAggregated = [];
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for (var i=0; i<datasets.length; i++) {
var dataset = datasets[i];
//Statistics on the datasets' formats.
ArrayUtils.TestAndIncrement(stats.formats, dataset.format);
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var dsformat = dataset.format.toLowerCase();
//Aggregated formats.
if (dsformat.includes("csv"))
ArrayUtils.TestAndIncrement(stats.formatsAggregated, "csv");
else if (dsformat.includes("pdf"))
ArrayUtils.TestAndIncrement(stats.formatsAggregated, "pdf");
else if (dsformat.includes("html"))
ArrayUtils.TestAndIncrement(stats.formatsAggregated, "html");
else if (dsformat.includes("json"))
ArrayUtils.TestAndIncrement(stats.formatsAggregated, "json");
else if (dsformat.includes("xml"))
ArrayUtils.TestAndIncrement(stats.formatsAggregated, "xml");
else if (dsformat.includes("shp"))
ArrayUtils.TestAndIncrement(stats.formatsAggregated, "shp");
else if (dsformat.includes("geojson"))
ArrayUtils.TestAndIncrement(stats.formatsAggregated, "geojson");
else if (dsformat.includes("kml"))
ArrayUtils.TestAndIncrement(stats.formatsAggregated, "kml");
else if (dsformat.includes("txt"))
ArrayUtils.TestAndIncrement(stats.formatsAggregated, "txt");
else if (dsformat.includes("xls") || dsformat.includes("xlsx") || dsformat.includes("ods"))
ArrayUtils.TestAndIncrement(stats.formatsAggregated, "xls/ods");
else
ArrayUtils.TestAndIncrement(stats.formatsAggregated, "other");
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}//EndForI.
//Calculates the formats percentages.
var tmpArrFormats = stats.formats;
stats.formats = [];
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ArrayUtils.IteratorOverKeys(tmpArrFormats, function(item, property) {
var recordFormat = {};
recordFormat.name = property;
recordFormat.occurrance = item;
recordFormat.occurrancePercentage = (item / datasets.length) * 100;
recordFormat.occurrancePercentage = Math.round(recordFormat.occurrancePercentage * 100) / 100;
stats.formats.push(recordFormat);
});
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//Calculates the formats percentage for the aggregated formats.
var tmpArrFormatsAggregated = stats.formatsAggregated;
stats.formatsAggregated = [];
ArrayUtils.IteratorOverKeys(tmpArrFormatsAggregated, function(item, property) {
var recordFormat = {};
recordFormat.name = property;
recordFormat.occurrance = item;
recordFormat.occurrancePercentage = (item / datasets.length) * 100;
recordFormat.occurrancePercentage = Math.round(recordFormat.occurrancePercentage * 100) / 100;
stats.formatsAggregated.push(recordFormat);
});
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return stats;
};//EndFunction.
/**
* Given a dataset in input it calculates statistics.
* @param dataset
* @private
*/
var _analyseDataset = function(dataset, stats) {
if (typeof stats === 'undefined')
stats = {};
if (!stats.hasOwnProperty('totRows')) {
stats.totRows = 0;
stats.totCols = 0;
stats.maxRowsPerDataset = null;
stats.minRowsPerDataset = null;
stats.maxColsPerDataset = null;
stats.minColsPerDataset = null;
stats.totDatasetsAnalysed = 0;
}
stats.totRows += dataset.numOfRows;
stats.totCols += dataset.numOfCols;
if (stats.maxRowsPerDataset === null || dataset.numOfRows > stats.maxRowsPerDataset)
stats.maxRowsPerDataset = dataset.numOfRows;
if (stats.minRowsPerDataset === null || dataset.numOfRows < stats.minRowsPerDataset)
stats.minRowsPerDataset = dataset.numOfRows;
if (stats.maxColsPerDataset === null || dataset.numOfCols > stats.maxColsPerDataset)
stats.maxColsPerDataset = dataset.numOfCols;
if (stats.minColsPerDataset === null || dataset.numOfCols < stats.minColsPerDataset)
stats.minColsPerDataset = dataset.numOfCols;
return stats;
};//EndFunction.
return {
constructor: ODStatistics,
analyse: function (datasets) {
var stats = _analyseFormats(datasets); //Analyses the datasets formats.
return stats;
},//EndFunction.
analyseDataset: function (dataset, stats) {
return _analyseDataset(dataset, stats);
}//EndFunction.
};
})();
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