iCalUS(stEvent)
Last updated August 26, 2008
Version: 1 | Requires: ColdFusion 5 | Library: DateLib
Description:
Produces output used by the iCalendar standard for inclusion in calendaring tools such as Outlook, Sunbird, etc.
Adapted from the vCal() function found on cflib.org by Chris Wigginton
Works to correctly offset daylight savings time in U.S.
Will set a reminder alarm 30 minutes prior to event. Look at the spec if you want to change this.
Good resource for the iCal spec -- http://www.kanzaki.com/docs/ical/
Return Values:
Returns a string.
Example:
eventStr = StructNew();
eventStr.organizerName = "Joe Mauer";
eventStr.organizerEmail = "joe@twins.com";
eventStr.startTime = ParseDateTime("3/31/2008 7:00 PM"); // this is Eastern time
eventStr.endTime = ParseDateTime("3/31/2008 10:00 PM");
eventStr.subject = "Twins vs Angels";
eventStr.location = "Metrodome";
eventStr.description = "The Twins home opener\n\nLet's cheer the Twins to a win!";
</cfscript>
<cfcontent type="text/calendar" reset="Yes">
<cfheader name="Content-Disposition" value="inline; filename=newAppointment.ics"><cfoutput>#iCalUS(eventStr)#</cfoutput>
Parameters:
| Name | Description | Required |
|---|---|---|
| stEvent | Structure of data for the event. | Yes |
Full UDF Source:
<cfscript>
/**
* Pass a formatted structure containing the event properties and get back a string in the iCalendar format (correctly offset for daylight savings time in U.S.) that can be saved to a file or returned to the browser with MIME type="text/calendar".
*
* @param stEvent Structure of data for the event. (Required)
* @return Returns a string.
* @author Troy Pullis (tpullis@yahoo.com)
* @version 1, August 26, 2008
*/
function iCalUS(stEvent) {
var vCal = "";
var CRLF=chr(13)&chr(10);
var date_now = Now();
if (NOT IsDefined("stEvent.organizerName"))
stEvent.organizerName = "Organizer Name";
if (NOT IsDefined("stEvent.organizerEmail"))
stEvent.organizerEmail = "Organizer_Name@CFLIB.ORG";
if (NOT IsDefined("stEvent.subject"))
stEvent.subject = "Event subject goes here";
if (NOT IsDefined("stEvent.location"))
stEvent.location = "Event location goes here";
if (NOT IsDefined("stEvent.description"))
stEvent.description = "Event description goes here\n---------------------------\nProvide the complete event details\n\nUse backslash+n sequences for newlines.";
if (NOT IsDefined("stEvent.startTime")) // This value must be in Eastern time!!!
stEvent.startTime = ParseDateTime("3/21/2008 14:30"); // Example start time is 21-March-2008 2:30 PM Eastern
if (NOT IsDefined("stEvent.endTime"))
stEvent.endTime = ParseDateTime("3/21/2008 15:30"); // Example end time is 21-March-2008 3:30 PM Eastern
if (NOT IsDefined("stEvent.priority"))
stEvent.priority = "1";
vCal = "BEGIN:VCALENDAR" & CRLF;
vCal = vCal & "PRODID: -//CFLIB.ORG//iCalUS()//EN" & CRLF;
vCal = vCal & "VERSION:2.0" & CRLF;
vCal = vCal & "METHOD:REQUEST" & CRLF;
vCal = vCal & "BEGIN:VTIMEZONE" & CRLF;
vCal = vCal & "TZID:Eastern Time" & CRLF;
vCal = vCal & "BEGIN:STANDARD" & CRLF;
vCal = vCal & "DTSTART:20061101T020000" & CRLF;
vCal = vCal & "RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=1SU;BYMONTH=11" & CRLF;
vCal = vCal & "TZOFFSETFROM:-400" & CRLF;
vCal = vCal & "TZOFFSETTO:-500" & CRLF;
vCal = vCal & "TZNAME:Standard Time" & CRLF;
vCal = vCal & "END:STANDARD" & CRLF;
vCal = vCal & "BEGIN:DAYLIGHT" & CRLF;
vCal = vCal & "DTSTART:20060301T020000" & CRLF;
vCal = vCal & "RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=2SU;BYMONTH=3" & CRLF;
vCal = vCal & "TZOFFSETFROM:-500" & CRLF;
vCal = vCal & "TZOFFSETTO:-400" & CRLF;
vCal = vCal & "TZNAME:Daylight Savings Time" & CRLF;
vCal = vCal & "END:DAYLIGHT" & CRLF;
vCal = vCal & "END:VTIMEZONE" & CRLF;
vCal = vCal & "BEGIN:VEVENT" & CRLF;
vCal = vCal & "UID:#date_now.getTime()#.CFLIB.ORG" & CRLF; // creates a unique identifier
vCal = vCal & "ORGANIZER;CN=#stEvent.organizerName#:MAILTO:#stEvent.organizerEmail#" & CRLF;
vCal = vCal & "DTSTAMP:" &
DateFormat(date_now,"yyyymmdd") & "T" &
TimeFormat(date_now, "HHmmss") & CRLF;
vCal = vCal & "DTSTART;TZID=Eastern Time:" &
DateFormat(stEvent.startTime,"yyyymmdd") & "T" &
TimeFormat(stEvent.startTime, "HHmmss") & CRLF;
vCal = vCal & "DTEND;TZID=Eastern Time:" &
DateFormat(stEvent.endTime,"yyyymmdd") & "T" &
TimeFormat(stEvent.endTime, "HHmmss") & CRLF;
vCal = vCal & "SUMMARY:#stEvent.subject#" & CRLF;
vCal = vCal & "LOCATION:#stEvent.location#" & CRLF;
vCal = vCal & "DESCRIPTION:#stEvent.description#" & CRLF;
vCal = vCal & "PRIORITY:#stEvent.priority#" & CRLF;
vCal = vCal & "TRANSP:OPAQUE" & CRLF;
vCal = vCal & "CLASS:PUBLIC" & CRLF;
vCal = vCal & "BEGIN:VALARM" & CRLF;
vCal = vCal & "TRIGGER:-PT30M" & CRLF; // alert user 30 minutes before meeting begins
vCal = vCal & "ACTION:DISPLAY" & CRLF;
vCal = vCal & "DESCRIPTION:Reminder" & CRLF;
vCal = vCal & "END:VALARM" & CRLF;
vCal = vCal & "END:VEVENT" & CRLF;
vCal = vCal & "END:VCALENDAR";
return vCal;
}
</cfscript>
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