source: trunk/grails-app/domain/dbnp/studycapturing/Event.groovy @ 392

package dbnp.studycapturing

import groovy.time.*

/**
 * The Event class describes an actual event, as it has happened to a certain subject. Often, the same event occurs
 * to multiple subjects at the same time. That is why the actual description of the event is factored out into a more
 * general EventDescription class. Events that also lead to sample(s) should be instantiated as SamplingEvents.
 *
 * Revision information:
 * $Rev: 392 $
 * $Author: keesvb $
 * $Date: 2010-05-04 15:03:21 +0000 (di, 04 mei 2010) $
 */
class Event extends TemplateEntity implements Serializable {

        Date startTime
        Date endTime
        
        static constraints = {
                endTime(validator: {val, obj ->
           if (val && val.before(obj.startTime)) {
                return 'endTimeshouldbegreater'
           }
        })
        }
        

        List<TemplateField> giveDomainFields() {
                [ new TemplateField( 
                            name: 'startTime',
                            type: TemplateFieldType.DATE),
                        new TemplateField( 
                            name: 'endTime',
                            type: TemplateFieldType.DATE) ];
        }

        // time diff between end and start date
        // thus, do this manually as follows

        static def getDuration(date1, date2) {
                def timeMillis = (date2.getTime() - date1.getTime()).abs()
                def days = (timeMillis / (1000 * 60 * 60 * 24)).toInteger()
                def hours = (timeMillis / (1000 * 60 * 60)).toInteger()
                def minutes = (timeMillis / (1000 * 60)).toInteger()
                def seconds = (timeMillis / 1000).toInteger()
                def millis = (timeMillis % 1000).toInteger()

                return new Duration(days, hours, minutes, seconds, millis)
        }

        def getDuration() {
                return getDuration(startTime, endTime)
        }

        // return a string that prints the duration sensibly.
        // the largest date unit (sec, min, h, day, week, month, or year)
        // is output

        static def getPrettyDuration(duration) {
                def handleNumerus = {number, string ->
                        return number.toString() + (number == 1 ? string : string + 's')
                }
                if (duration.getYears() > 0) return handleNumerus(duration.getYears(), " year")
                if (duration.getMonths() > 0) return handleNumerus(duration.getMonths(), " month")
                if (duration.getDays() > 0) return handleNumerus(duration.getDays(), " day")
                if (duration.getHours() > 0) return handleNumerus(duration.getHours(), " hour")
                if (duration.getMinutes() > 0) return handleNumerus(duration.getMinutes(), " minute")
                return handleNumerus(duration.getSeconds(), " second")
        }

        // convenience method. gives formatted string output for a duration
        def getPrettyDuration() {
                getPrettyDuration(getDuration())
        }

        // convenience method. gives formatted string output for a duration
        static def getPrettyDuration(date1, date2) {
                return getPrettyDuration(getDuration(date1, date2))
        }

        def getDurationString() {
                def d = getDuration()
                return "${d.days} days, ${d.hours} hrs, ${d.minutes} min, ${d.seconds} sec."
        }

        def getShortDuration() {
                def d = getDuration()
                def days = d.days
                def hours = d.hours - (24 * days)
                def minutes = d.minutes - (24 * 60 * days) - (60 * hours)
                return "${days}d ${hours}:${minutes}"
        }

        def isSamplingEvent() {
                return (this instanceof SamplingEvent)
        }

        def String toString() {
                return fieldExists( 'Description' ) ? getFieldValue( 'Description') : ""
        }

}