Output now passes ical validation

- A few required fields were missing for proper ical validation: PRODID,
UID, DTSTAMP
- Added optional params to configure prodid and uid
- Fixed bug: Start and End times were reporting DATE instead of
DATE-TIME, so some consumers would ignore event times
- Fixed bug: If start/end times only contained hours, no time would be
reported at all
- Added a new method: "build" which simply returns the ical contents
instead of trying to trigger a download

ics.js

@@ -1,7 +1,7 @@
 /* global saveAs, Blob, BlobBuilder, console */
 /* exported ics */
 
-var ics = function() {
+var ics = function( uidDomain, prodId ) {
     'use strict';
 
     if (navigator.userAgent.indexOf('MSIE') > -1 && navigator.userAgent.indexOf('MSIE 10') == -1) {
@@ -9,10 +9,14 @@ var ics = function() {
         return;
     }
 
+	if (typeof uidDomain === 'undefined') { uidDomain = 'default'; }
+	if (typeof prodId === 'undefined') { prodId = 'Calendar'; }
+	
     var SEPARATOR = (navigator.appVersion.indexOf('Win') !== -1) ? '\r\n' : '\n';
     var calendarEvents = [];
     var calendarStart = [
         'BEGIN:VCALENDAR',
+		'PRODID:'+prodId,
         'VERSION:2.0'
     ].join(SEPARATOR);
     var calendarEnd = SEPARATOR + 'END:VCALENDAR';
@@ -56,6 +60,7 @@ var ics = function() {
             //TODO add time and time zone? use moment to format?
             var start_date = new Date(begin);
             var end_date = new Date(stop);
+			var now_date = new Date();
 
             var start_year = ("0000" + (start_date.getFullYear().toString())).slice(-4);
             var start_month = ("00" + ((start_date.getMonth() + 1).toString())).slice(-2);
@@ -70,24 +75,35 @@ var ics = function() {
             var end_hours = ("00" + (end_date.getHours().toString())).slice(-2);
             var end_minutes = ("00" + (end_date.getMinutes().toString())).slice(-2);
             var end_seconds = ("00" + (end_date.getMinutes().toString())).slice(-2);
+			
+            var now_year = ("0000" + (now_date.getFullYear().toString())).slice(-4);
+            var now_month = ("00" + ((now_date.getMonth() + 1).toString())).slice(-2);
+            var now_day = ("00" + ((now_date.getDate()).toString())).slice(-2);
+            var now_hours = ("00" + (now_date.getHours().toString())).slice(-2);
+            var now_minutes = ("00" + (now_date.getMinutes().toString())).slice(-2);
+            var now_seconds = ("00" + (now_date.getMinutes().toString())).slice(-2);
 
             // Since some calendars don't add 0 second events, we need to remove time if there is none...
             var start_time = '';
             var end_time = '';
-            if (start_minutes + start_seconds + end_minutes + end_seconds != 0) {
+            if (start_hours + start_minutes + start_seconds + end_hours + end_minutes + end_seconds != 0) {
                 start_time = 'T' + start_hours + start_minutes + start_seconds;
                 end_time = 'T' + end_hours + end_minutes + end_seconds;
             }
+			var now_time = 'T' + now_hours + now_minutes + now_seconds;
 
             var start = start_year + start_month + start_day + start_time;
             var end = end_year + end_month + end_day + end_time;
+			var now = now_year + now_month + now_day + now_time;
 
             var calendarEvent = [
                 'BEGIN:VEVENT',
+				'UID:'+calendarEvents.length+"@"+uidDomain,
                 'CLASS:PUBLIC',
                 'DESCRIPTION:' + description,
-                'DTSTART;VALUE=DATE:' + start,
+				'DTSTAMP;VALUE=DATE-TIME:' + now,
-                'DTEND;VALUE=DATE:' + end,
+                'DTSTART;VALUE=DATE-TIME:' + start,
+                'DTEND;VALUE=DATE-TIME:' + end,
                 'LOCATION:' + location,
                 'SUMMARY;LANGUAGE=en-us:' + subject,
                 'TRANSP:TRANSPARENT',
@@ -121,6 +137,19 @@ var ics = function() {
                 blob = bb.getBlob('text/x-vCalendar;charset=' + document.characterSet);
             }
             saveAs(blob, filename + ext);
+            return calendar;
+        },
+		
+		/**
+         * Build and return the ical contents
+         */
+        'build': function() {
+            if (calendarEvents.length < 1) {
+                return false;
+            }
+
+            var calendar = calendarStart + SEPARATOR + calendarEvents.join(SEPARATOR) + calendarEnd;
+
             return calendar;
         }
     };