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Parse Events from iCal URL or File (e.g. Google Calendar)

/ Published in: Groovy
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Thanx to Guillaume Laforge, who provided this code snippet of Groovy code in a GSP. The snippet below is more or less the same, less the HTML. It will show all future evens and create a eventMap for each event.

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  1. import net.fortuna.ical4j.util.Calendars
  2. import net.fortuna.ical4j.model.component.VEvent
  3. import java.text.SimpleDateFormat
  4.  
  5.  
  6.     def url = 'http://www.google.com/calendar/ical/jds6o8imt8qgtepchsmr72jhf4%40group.calendar.google.com/public/basic.ics'.toURL()
  7.     def cal = Calendars.load(url)
  8.  
  9.     def dayFormatter = new SimpleDateFormat("EEEEEEEE, MMMMMMMM dd'th' yyyy", Locale.US)
  10.     def timeFormatter = new SimpleDateFormat('HH:mm', Locale.US)
  11.  
  12.     def dates = []
  13.     def now = new Date() 
  14.     log.debug("Total components in iCal file: ${cal.components.size()}" )
  15.  
  16.     cal.components.findAll {it.startDate.date.time > now.time }.sort { it.startDate.date }.each
  17.     {
  18.       if (!it instanceof VEvent)
  19.       {
  20.         log.warn("Found event of class ${it.getClass()}, skipping!")
  21.         return;
  22.       }
  23.  
  24.       def startDate = dayFormatter.format(it.startDate.date)
  25.       def startTime = timeFormatter.format(it.startDate.date)
  26.  
  27.       def eventMap = [
  28.               startDate : startDate,
  29.               startTime : startTime,
  30.               location : (it.location.value) ? it.location.value : 'No Location',
  31.               summary : it.summary.value,
  32.               description : it.description.value
  33.       ]
  34.  
  35.       dates << eventMap

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