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144 lines
4.1 KiB
144 lines
4.1 KiB
// variable to en-/disable debug
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// set to 1 to enable debug log
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var DEBUG;
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// server url
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var serverUrl = "http://widgets.vvo-online.de/abfahrtsmonitor/";
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// xmlhttp object function
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function getHTTPObject() {
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// debug log
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if (DEBUG === 1) {console.log("xml http object function");}
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var xhr;
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// check for availibility if xmlhttprequest object
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if(window.XMLHttpRequest) {
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xhr = new XMLHttpRequest();
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} else if(window.ActiveXObject) {
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xhr = new ActiveXObject("Msxml2.XMLHTTP");
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}
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return xhr;
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}
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// ajax call function
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function ajaxCall(dataUrl, outputElement, callback, responseType) {
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// debug log
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if (DEBUG === 1) {console.log("ajax function");}
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// get the xmlhttp object which is supported
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var request = getHTTPObject();
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outputElement.innerHTML = "Lade Daten ...";
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request.onreadystatechange = function() {
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if(request.readyState === 4 && request.status === 200) {
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//save ajax response
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if (responseType === "json") {
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var response = JSON.parse(request.responseText);
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} else if (responseType === "xml") {
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var response = request.responseXML;
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} else {
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var response = request.responseText;
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}
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// check if callback is a function
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if(typeof callback === "function") {
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callback(response);
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}
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}
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};
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request.open("get", dataUrl, true);
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request.send(null);
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}
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// wrap all in anonymous function to get out of global scope
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(function() {
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// debug log
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if (DEBUG === 1) {console.log("anonymous function");}
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// get the search form
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var searchForm = document.getElementById("search-form");
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// haltestelle object
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var haltestelle = {
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getInfo : function(event) {
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// debug log
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if (DEBUG === 1) {console.log("getInfo function");}
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// prevent submit default behaviour
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event.preventDefault();
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// get output area
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var target = document.getElementById("output");
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var hstName = document.getElementById("q").value;
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var hstUrl = serverUrl + "Abfahrten.do?ort=dresden&hst=" + hstName;
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ajaxCall(hstUrl, target, function(data) {
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// debug log
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if (DEBUG === 1) {console.log("received data: " + data);}
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data = data.replace(/\],\[/gi, '#');
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data = data.replace(/\(.+?\)/gi, '');
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data = data.replace('ß', 'ss');
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data = data.slice(2,-2).split("#");
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// debug log
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if (DEBUG === 1) {console.log("parsed data: " + data);}
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var i;
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var y;
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var htmlOutput;
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var dataLength = data.length;
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// generate table header
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htmlOutput = "<table>";
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htmlOutput += "<tr>";
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htmlOutput += "<th>Linie</th>";
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htmlOutput += "<th>Richtung</th>";
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htmlOutput += "<th>Abfahrt</th>";
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htmlOutput += "</tr>";
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// generate table entries
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for (i = 0; i < dataLength; i++) {
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htmlOutput += "<tr>";
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var entry = data[i].split(",");
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// debug log
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if (DEBUG === 1) {console.log("part " + i + " of parsed data: " + entry);}
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for (y = 0; y < 3; y++) {
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// debug log
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if (DEBUG === 1) {console.log("part " + y + ": " + entry[y]);}
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htmlOutput += "<td>" + entry[y].slice(1,-1) + "</td>";
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}
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htmlOutput += "</tr>";
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}
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// close table
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htmlOutput += "</table>";
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// print table into web page
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target.innerHTML = htmlOutput;
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}, "text");
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}
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};
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//event listeners
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searchForm.addEventListener("submit", haltestelle.getInfo, false);
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})(); // end of anonymous function
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