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113 lines
2.1 KiB
113 lines
2.1 KiB
<?php
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/**
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This file can read data from an external csv source and output the same
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data in Google DataTable JSON format
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Note that it supposes that each data column contains numbers
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*/
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header('Content-type: text/plain');
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// datasource url. This can be an external source
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//$datasourceUrl = "http://demo.almende.com/links/graph3d/js/examples/datasource_csv.php";
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$path = dirname("http://" . $_SERVER["SERVER_NAME"] . $_SERVER["REQUEST_URI"]) . '/';
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$dataSourceUrl = $path . "datasource_csv.php";
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$reqId = getReqId();
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$data = file_get_contents($dataSourceUrl);
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$rows = split("\n", $data);
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// output the header part of the response
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echo "google.visualization.Query.setResponse({
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version:'0.6',
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reqId:'$reqId',
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status:'ok',
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table:{
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cols:[
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";
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// output the column names
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$cols = split(",", $rows[0]);
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$colCount = count($cols);
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$colFirst = true;
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foreach($cols as $col) {
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if ($colFirst == true)
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$colFirst = false;
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else
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echo ",\n"; // end of previous label
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$colStr = trim(str_replace('"', '', $col)); // TODO: bad way to remove enclosing quotes
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echo " {id:'$colStr', label:'$colStr', type:'number'}";
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}
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unset($rows[0]); // remove the first row with headers from the array
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// output the part between cols and rows
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echo "
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],
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rows:[
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";
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// output the data
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$firstRow = true;
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foreach ($rows as $row) {
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$cols = split(",", $row);
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if (count($cols) == $colCount) {
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if ($firstRow == true)
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$firstRow = false;
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else
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echo ",\n"; // end of previous line
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echo " {c:["; // start of the row
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$firstCol = true;
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foreach ($cols as $col) {
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if ($firstCol == true)
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$firstCol = false;
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else
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echo ", "; // end of previous value
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echo "{v:" . $col . "}";
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}
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echo "]}"; // end of the row
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}
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}
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// output the end part of the response
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echo "
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]
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}
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});
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";
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/**
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* Retrieve the request id from the get/post data
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* @return {number} $reqId The request id, or 0 if not found
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*/
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function getReqId() {
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$reqId = 0;
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foreach ($_REQUEST as $req) {
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if (substr($req, 0,6) == "reqId:") {
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$reqId = substr($req, 6);
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}
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}
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return $reqId;
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}
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?>
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