{groovy:output=wiki}
// Looks through all attachments for the current page and finds those that match the pattern 
// Create a tab for each year and under the year, a tab for each matching attachment
// Include the attachment via the html macro
attachmentNameRegex = /(2\d\d\d)\.(\d\d)\.(\d\d)\..*htm/  // 3 group regex - name contains a date like 2012.05.04
def attachments = attachmentManager.getAttachments(context.getEntity())
def cardList = []
attachments.each { attachment ->
    name = attachment.getDisplayTitle()
    def matcher = name =~ attachmentNameRegex
    if (matcher.find()) {
        cardList << [
            attachmentName: name,
            year: matcher.group(1),
            month: matcher.group(2),
            day: matcher.group(3)
        ]
    }
}
cardList = cardList.sort { a, b -> 
    def result = b.year.compareTo(a.year)   // sort by year first, desc order
    if (result == 0) {
        result = a.month.compareTo(b.month) // sort by month
    }
    if (result == 0) {
        result = a.day.compareTo(b.day) // sort by day
    }
    return result
}
def br = '\n'

out << '{deck:id=by_year}'
out << br
def year = ''
cardList.each { card ->
    if (card.year != year) {  // need a new year card
        if (year != '') {  // first time through
            out << '{card}'  // end previous card
            out << br
            out << '{deck}'  // end previous deck
            out << br
        }
        year = card.year 
        out << "{card:label=${year}}"
        out << br
        out << "{deck:id=year_${card.year}}"
        out << br
    }    
    out << "{card:label=${card.month}/${card.day}}"   
    out << br
    out << "{html:script=${context.getPageTitle()}^${card.attachmentName}|tidy=true} {html}"
    out << br
    out << '{card}'
    out << br
}
out << '{card}'
out << br
out << '{deck}'
out << br
out << '{deck}'
out << br
{groovy}