/** * @filename utils.js * @description This file declares and defines the commonly required utility * methods of setting and removing timers, getting the top left bottom right * corners of the div, centralising stuff and similar small time utilities. * @author Y.Kamesh Rao * @date 18-Feb-2009 */ /** * Declaring the Utils JSON object */ window.Utils = window.Utils || {}; /** * Set and start the timer for animating something or getting statuses */ Utils.startTimer = function(timer, callback, interval) { clearTimeout(timer); timer = 0; timer = setTimeout(callback,interval); return timer; } /** * Stop the timer */ Utils.stopTimer = function(timer) { clearTimeout(timer); timer=0; return timer; } /* * Methods for calculating last Update for channels */ Date.prototype.toISO8601String = function (format, offset) { /* accepted values for the format [1-6]: 1 Year: YYYY (eg 1997) 2 Year and month: YYYY-MM (eg 1997-07) 3 Complete date: YYYY-MM-DD (eg 1997-07-16) 4 Complete date plus hours and minutes: YYYY-MM-DDThh:mmTZD (eg 1997-07-16T19:20+01:00) 5 Complete date plus hours, minutes and seconds: YYYY-MM-DDThh:mm:ssTZD (eg 1997-07-16T19:20:30+01:00) 6 Complete date plus hours, minutes, seconds and a decimal fraction of a second YYYY-MM-DDThh:mm:ss.sTZD (eg 1997-07-16T19:20:30.45+01:00) */ if (!format) { var format = 6; } if (!offset) { var offset = 'Z'; var date = this; } else { var d = offset.match(/([-+])([0-9]{2}):([0-9]{2})/); var offsetnum = (Number(d[2]) * 60) + Number(d[3]); offsetnum *= ((d[1] == '-') ? -1 : 1); var date = new Date(Number(Number(this) + (offsetnum * 60000))); } } Date.prototype.setISO8601 = function (string) { var regexp = "([0-9]{4})(-([0-9]{2})(-([0-9]{2})" + "(T([0-9]{2}):([0-9]{2})(:([0-9]{2})(\.([0-9]+))?)?" + "(Z|(([-+])([0-9]{2}):([0-9]{2})))?)?)?)?"; var d = string.match(new RegExp(regexp)); var offset = 0; var date = new Date(d[1], 0, 1); if (d[3]) { date.setMonth(d[3] - 1); } if (d[5]) { date.setDate(d[5]); } if (d[7]) { date.setHours(d[7]); } if (d[8]) { date.setMinutes(d[8]); } if (d[10]) { date.setSeconds(d[10]); } if (d[12]) { date.setMilliseconds(Number("0." + d[12]) * 1000); } if (d[14]) { offset = (Number(d[16]) * 60) + Number(d[17]); offset *= ((d[15] == '-') ? 1 : -1); } offset -= date.getTimezoneOffset(); time = (Number(date) + (offset * 60 * 1000)); this.setTime(Number(time)); } function checkTimeZone() { var rightNow = new Date(); var date1 = new Date(rightNow.getFullYear(), 0, 1, 0, 0, 0, 0); var date2 = new Date(rightNow.getFullYear(), 6, 1, 0, 0, 0, 0); var temp = date1.toGMTString(); var date3 = new Date(temp.substring(0, temp.lastIndexOf(" ")-1)); var temp = date2.toGMTString(); var date4 = new Date(temp.substring(0, temp.lastIndexOf(" ")-1)); var hoursDiffStdTime = (date1 - date3) / (1000 * 60 * 60); var hoursDiffDaylightTime = (date2 - date4) / (1000 * 60 * 60); if (hoursDiffDaylightTime == hoursDiffStdTime) { //alert("Time zone is GMT " + hoursDiffStdTime + ".\nDaylight Saving Time is NOT observed here."); return("false") } else { // alert("Time zone is GMT " + hoursDiffStdTime + ".\nDaylight Saving Time is observed here."); return("true") } } function isDSTOn() { var dt=new Date(); var cy=dt.getFullYear(); var cm=parseInt(dt.getMonth())+1; var cd=parseInt(dt.getDate()); //alert(cd+"/"+cm+"/"+cy); var thisYear, AprilDate, OctoberDate, MarchDateEU, OctoberDateEU, MarchDate, NovemberDate; thisYear = Math.round(parseInt(cy)); AprilDate = (2+6 * thisYear - Math.floor (thisYear / 4) ) % 7 + 1; OctoberDate= (31-( Math.floor (thisYear * 5 / 4) + 1) % 7); MarchDate = 14 - (Math.floor (1 + thisYear * 5 / 4) % 7); NovemberDate = 7 - (Math.floor (1 + thisYear * 5 / 4) % 7); MarchDateEU = (31-( Math.floor (thisYear * 5 / 4) + 4) % 7); OctoberDateEU = (31-( Math.floor (thisYear * 5 / 4) + 1) % 7); var DSTStartMonth,DSTEndMonth; var DSTStartDay,DSTEndDay; if(thisYear>2006) { DSTStartMonth=3; DSTStartDay=parseInt(MarchDate); DSTEndMonth=11; DSTEndDay=parseInt(NovemberDate); } else { DSTStartMonth=4; DSTStartDay=parseInt(AprilDate); DSTEndMonth=10; DSTEndDay=parseInt(OctoberDate); } var answer="false" if(cm>DSTStartMonth && cm=DSTStartDay)answer="true"; } else if(cm==DSTEndMonth) { if(cd<=DSTEndDay)answer="true" } else answer="false"; //alert(DSTStartDay+"/"+DSTStartMonth+"/"+cy); //alert(DSTEndDay+"/"+DSTEndMonth+"/"+cy); //alert(answer); return(answer); } function getElapsedTime(qty,oldDate,newDate) { var d1 =oldDate ; var d2 =newDate; var second= 1000; var minute= second*60; var hour = minute*60; var day = hour*24; var week = day*7; var month = day*30; var year = day*365; var diff; if(qty=="second") diff = Math.floor((d2-d1)/(second)); else if(qty=="minute")diff = Math.floor((d2-d1)/(minute)); else if(qty=="hour") diff = Math.floor((d2-d1)/(hour)); else if(qty=="day") diff = Math.floor((d2-d1)/(day)); else if(qty=="week") diff = Math.floor((d2-d1)/(week)); else if(qty=="month") diff = Math.floor((d2-d1)/(month)); else if(qty=="year") diff = Math.floor((d2-d1)/(year)); return(diff); } function checkDiffrence(qty,serverTimestamp) { var dstOffset=0 if(checkTimeZone()=="false") { dstOffset=(1000*60*60); //alert(dstOffset); } if(isDSTOn()=="false") { dstOffset=0; } var current=new Date().toString(); var old = new Date(); old.setISO8601(serverTimestamp); timestamp1 = parseInt(Date.parse(old))+dstOffset; timestamp2 = Date.parse(current); var diff=getElapsedTime(qty,timestamp1,timestamp2); return(diff); } /* * Get the last update of channel by giving parameter "serverTimestamp". */ function getAge(serverTimestamp) { var age; if(serverTimestamp==null) { age="No Updated Clips."; } else { if(checkDiffrence("year",serverTimestamp)==1)age=checkDiffrence("year",serverTimestamp)+" year ago"; else if(checkDiffrence("month",serverTimestamp)==1)age=checkDiffrence("month",serverTimestamp)+" month ago"; else if(checkDiffrence("week",serverTimestamp)==1)age=checkDiffrence("week",serverTimestamp)+" week ago"; else if(checkDiffrence("day",serverTimestamp)==1)age=checkDiffrence("day",serverTimestamp)+" day ago"; else if(checkDiffrence("hour",serverTimestamp)==1)age=checkDiffrence("hour",serverTimestamp)+" hour ago"; else if(checkDiffrence("minute",serverTimestamp)==1)age=checkDiffrence("minute",serverTimestamp)+" minute ago"; else if(checkDiffrence("second",serverTimestamp)==1)age=checkDiffrence("second",serverTimestamp)+" less than a minute ago"; if(checkDiffrence("year",serverTimestamp)>1)age=checkDiffrence("year",serverTimestamp)+" years ago"; else if(checkDiffrence("month",serverTimestamp)>1)age=checkDiffrence("month",serverTimestamp)+" months ago"; else if(checkDiffrence("week",serverTimestamp)>1)age=checkDiffrence("week",serverTimestamp)+" weeks ago"; else if(checkDiffrence("day",serverTimestamp)>1)age=checkDiffrence("day",serverTimestamp)+" days ago"; else if(checkDiffrence("hour",serverTimestamp)>1)age=checkDiffrence("hour",serverTimestamp)+" hours ago"; else if(checkDiffrence("minute",serverTimestamp)>1)age=checkDiffrence("minute",serverTimestamp)+" minutes ago"; else if(checkDiffrence("second",serverTimestamp)>1)age=checkDiffrence("second",serverTimestamp)+" less than a minute ago"; else if(checkDiffrence("year",serverTimestamp)<0)age="recently"; } return(age); } function elaborateTimestamp(serverTimestamp) { var dstOffset=0 if(checkTimeZone()=="false") { dstOffset=(1000*60*60); //alert(dstOffset); } if(isDSTOn()=="false") { dstOffset=0; } var current=new Date().toString(); var old = new Date(); old.setISO8601(serverTimestamp); timestamp1 = parseInt(Date.parse(old))+dstOffset; var dt=new Date(timestamp1); var cy=dt.getFullYear(); var cm=parseInt(dt.getMonth())+1; var cd=parseInt(dt.getDate()); var ch= parseInt(dt.getHours()); var dd=parseInt(dt.getMinutes()); var ds=parseInt(dt.getSeconds()); var newDate=new Date(cy,cm,cd,ch,dd,ds); var month=new Array("Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sept","Oct","Nov","Dec"); var monthText=""; for(var i=1;i<=12;i++){ if(i==cm){ //alert("h"+month[i]); //alert(i+":"+cm) monthText=month[i-1]; } } var ampm=""; if(ch>12 && dd<60){ ampm="PM"; }else { ampm="AM"; } var FinalDate=""; FinalDate=FinalDate+" "+monthText+" "+cd+", "+" "+cy+" "+ch+":"+dd+" "+ampm; //alert(cy+"::"+cm+":::"+cd+"::"+ch+"::"+dd+"::"+ds+"::"+newDate); //alert(d.getMonth); //alert(FinalDate); return(FinalDate); }