/***** Created by Terje Rudi, HVL, 2017 *****/

function domReady () {
  // JQUERY ready-alternative - det blir ingen feil dersom denne funksjonen gjentas
  document.body.className += " javascript";
  //...
}

function isNotVal(val){
	// brukes til sjekking om verdi har innhold og/eller er gyldig
	return (val==null || val===false);
}

// Mozilla, Opera, Webkit 
if ( document.addEventListener ) {
  document.addEventListener( "DOMContentLoaded", function(){
    document.removeEventListener( "DOMContentLoaded", arguments.callee, false);
    domReady(); // <- kan brukes ute i html-doc
  }, false );

// If IE event model is used (Explorer 8...)
} else if ( document.attachEvent ) {
  // ensure firing before onload
  document.attachEvent("onreadystatechange", function(){
    if ( document.readyState === "complete" ) {
      document.detachEvent( "onreadystatechange", arguments.callee );
      domReady(); // <- kan brukes ute i html-doc
    }
  });
}

// AJAX

var AJAXerrors = {
	"0":"Unknown Error",
  	"100":"Continue",
	"101":"Switching Protocol",
	"103":"Processing (WebDAV)",
	"200":"OK",
	"201":"Created",
	"202":"Accepted",
	"203":"Non-Authoritative Information",
	"204":"No Content",
	"205":"Reset Content",
	"206":"Partial Content",
	"207":"Multi-Status (WebDAV)",
	"208":"Multi-Status (WebDAV)",
	"226":"IM Used (HTTP Delta encoding)",
	"300":"Multiple Choice",
	"301":"Moved Permanently",
	"302":"Found",
	"303":"See Other",
	"304":"Not Modified",
	"305":"Use Proxy ",
	"306":"unused",
	"307":"Temporary Redirect",
	"308":"Permanent Redirect",
	"400":"Bad Request",
	"401":"Unauthorized",
	"402":"Payment Required",
	"403":"Forbidden",
	"404":"Not Found",
	"405":"Method Not Allowed",
	"406":"Not Acceptable",
	"407":"Proxy Authentication Required",
	"408":"Request Timeout",
	"409":"Conflict",
	"410":"Gone",
	"411":"Length Required",
	"412":"Precondition Failed",
	"413":"Payload Too Large",
	"414":"URI Too Long",
	"415":"Unsupported Media Type",
	"416":"Requested Range Not Satisfiable",
	"417":"Expectation Failed",
	"418":"I'm a teapot",
	"421":"Misdirected Request",
	"422":"Unprocessable Entity (WebDAV)",
	"423":"Locked (WebDAV)",
	"424":"Failed Dependency (WebDAV)",
	"426":"Upgrade Required",
	"428":"Precondition Required",
	"429":"Too Many Requests",
	"431":"Request Header Fields Too Large",
	"451":"Unavailable For Legal Reasons",
	"500":"Internal Server Error",
	"501":"Not Implemented",
	"502":"Bad Gateway",
	"503":"Service Unavailable",
	"504":"Gateway Timeout",
	"505":"HTTP Version Not Supported",
	"506":"Variant Also Negotiates",
	"507":"Insufficient Storage",
	"508":"Loop Detected (WebDAV)",
	"510":"Not Extended",
	"511":"Network Authentication Required"
}

function makeRequest(url,callback,ref,callbackExstraArgsObj) {
	// AJAX-kall
	if (typeof callback != "undefined"){
		var req = new XMLHttpRequest();
		if (!req) {
		  alert('Gir opp :( XMLHTTP instance not created -1');
		  return false;
		}

		req.onreadystatechange = function(){
			try {
				if (req.readyState === XMLHttpRequest.DONE) {
				  if (req.status !== 200) {
					try {
						console.log('En feil oppstod: ' + AJAXerrors[req.status] + ' (' + req.status + ')');
					}catch (e){
						console.log('Det var et problem med å hente data. Feilkode: ' + req.status);
					}
				  }else{
					try{
						if (callbackExstraArgsObj && typeof callbackExstraArgsObj == "object"){
							callback(req.responseText,callbackExstraArgsObj);
						}else{
							callback(req.responseText);
						}
					}catch(e){
						try {
							console.log('En feil oppstod [-1]: ' + e + ' (Melding: ' + AJAXerrors[req.status] + ' (sjekk callback))');
						}catch (f){
							console.log('Kunne ikke aktivere callback: ' + e + ' (Status: ' + req.status + ')');
						}
					}	
				  }
				}
			}catch( e ) {
				console.log('Opplevde et unntak: ' + e.description);
			}
		};
		req.open('GET', url);
		req.send();
	}else{
		console.log("Callback undefinert i 'makeRequest', referanse: " + ref);
	}
}

function postJson(url,json,callback,ref,callbackExstraArgsObj) {
	// Sendes som btoa (base64)
	// AJAX-kall
	if (typeof callback != "undefined"){
		var req = new XMLHttpRequest();
		if (!req) {
		  alert('Gir opp :( XMLHTTP instance not created -2');
		  return false;
		}
		req.onreadystatechange = function(){
			try {
				if (req.readyState === XMLHttpRequest.DONE) {
				  if (req.status !== 200) {
					try {
						console.log('En feil oppstod: ' + AJAXerrors[req.status]);
					}catch (e){
						console.log('Det var et problem med å hente data. Feilkode: ' + req.status);
					}
				  }else{
					try{
						if (callbackExstraArgsObj && typeof callbackExstraArgsObj == "object"){
							callback(req.responseText,callbackExstraArgsObj);
						}else{
							callback(req.responseText);
						}
					}catch(e){
						try {
							console.log('En feil oppstod [-2]: ' + e + ' (Melding: ' + AJAXerrors[req.status] + ', Callback = ' + JSON.stringify(callback) + ')');
						}catch (f){
							console.log('Kunne ikke aktivere callback: ' + e + ' (Status: ' + req.status + ')');
						}
					}	
				  }
				}
			}catch( e ) {
				console.log('Opplevde et unntak: ' + e.description);
			}
		};
		req.open("POST", url);
		var params = "btoajson=" + btoa(JSON.stringify(json));
		//Send the proper header information along with the request
		req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
		//req.setRequestHeader("Content-length", params.length);
		//req.setRequestHeader("Connection", "close");
		req.send(params);
	}else{
		console.log("Callback undefinert i 'makeJSONpostRequest', referanse: " + ref);
	}
}

function addCSSRule(sheet, selector, rules, index) {
	return true;
	/* FASET UT
	try{
		if("insertRule" in sheet) {
			sheet.insertRule(selector + "{" + rules + "}", index);
		}else if("addRule" in sheet) {
			sheet.addRule(selector, rules, index);
		}
	}catch(e){
		console.log("FEIL ved innsetting av i stilark: " + e + ". Sheet = " + sheet + " Selector = " + selector + " Index = " + index);
	}
	*/
}

// SlideUp SlideDown SlideToggle

/*
Element to slide gets the following CSS: max-height: 0;opacity: 0;overflow: hidden;transition: max-height 0.4s ease 0s;
*/
function slideElemDown(elem) {
	elem.style.maxHeight = '1000px';
	// We're using a timer to set opacity = 0 because setting max-height = 0 doesn't (completely) hide the element.
	elem.style.opacity   = '1';
}
function slideElemUp(elem) {
	elem.style.maxHeight = '0';
	once( 1, function () {
		elem.style.opacity = '0';
	});
}
function slideElemToggle(elem){
	if (elem.style.opacity == 1){
		slideElemUp(elem);
	}else{
		slideElemDown(elem);
	}
}
function once (seconds, callback) {
	var counter = 0;
	var time = window.setInterval( function () {
		counter++;
		if ( counter >= seconds ) {
			callback();
			window.clearInterval( time );
		}
	}, 400 );
}
// Sliding ferdig

/* UTFASET
// direkte manipulering av stilark for HVL-Bouvet-stil
try{
	// Fjerne dobbel ned-pil i Explorer i rullegardinmeny:
	addCSSRule(document.styleSheets[0],'select::-ms-expand','display: none',0);
	// Sette inn spinner
	addCSSRule(document.styleSheets[0],'@-webkit-keyframes rwSpinnerRotate','{-webkit-transform:rotate(0deg);}to{-webkit-transform:rotate(360deg);}',document.styleSheets[0].cssRules.length);
	addCSSRule(document.styleSheets[0],'@-moz-keyframes rwSpinnerRotate','{-moz-transform:rotate(0deg);}to{-moz-transform:rotate(360deg);}',document.styleSheets[0].cssRules.length);
	addCSSRule(document.styleSheets[0],'@-ms-keyframes rwSpinnerRotate','{-ms-transform:rotate(0deg);}to{-ms-transform:rotate(360deg);}',document.styleSheets[0].cssRules.length);
	addCSSRule(document.styleSheets[0],'@keyframes rwSpinnerRotate','{transform:rotate(0deg);}to{transform:rotate(360deg);}',document.styleSheets[0].cssRules.length);
	addCSSRule(document.styleSheets[0],'.rwSpin','position:relative;top:0.3rem;left:0.3rem;padding: 0.2rem;color: #fff;width: 0.6rem;height: 0.6rem;background: #acb7b2;border-radius: 0.6rem;-webkit-animation-name: rwSpinnerRotate;-webkit-animation-duration: 0.8s;-webkit-animation-iteration-count: infinite;-webkit-animation-timing-function: linear;-moz-animation-name: rwSpinnerRotate;-moz-animation-duration: 0.8s;-moz-animation-iteration-count: infinite;-moz-animation-timing-function: linear;-ms-animation-name: rwSpinnerRotate;-ms-animation-duration: 0.8s;-ms-animation-iteration-count: infinite;-ms-animation-timing-function: linear;');

}catch(e){
	console.log("addRule or insertRule not supported");
}
*/

/*** FASTE HJELPERE ***/

function swapLang(){
	// Bytter ut all elementers tekst med verdi fra 'data-english' - oversetter rett ot slett,
	// men bare derson verdi i data-english eksisterer:
	// Eks: <button onclick='swapLang();' data-english='Norsk'>In english</button>
	try{
		var otherLangVals = document.querySelectorAll("[data-english]");
		for (key in otherLangVals){
			try{
				var otherLangString = otherLangVals[key].getAttribute("data-english");
				if (otherLangString != "undefined"){
					var originalString = otherLangVals[key].innerHTML;
					otherLangVals[key].innerHTML = otherLangString;
					otherLangVals[key].setAttribute("data-english",originalString);
				}
			}catch(f){
				console.log(f);
			}
		}
	}catch(e){
		alert("Sorry, translation unavailable :-(");
	}
}

/*** FASTE HJELPERE SLUTT ***/





// EXTENSION extractHVLCalendarInfo