sdq/rrule.swift

recurrence rules for calendar dates in Swift.

rrule.swift

rrule.swift supports recurrence rules in Swift 4 (No other 3rd-party dependencies).

It is a partial port of the rrule module from the excellent python-dateutil library.

Demo

How to use

Drag rrule.swift into your project.

let rule = rule(frequency, dtstart: dtstart, until: until, count: count, interval: interval, wkst: wkst, bysetpos: bysetpos, bymonth: bymonth, bymonthday: bymonthday, byyearday: byyearday, byweekno: byweekno, byweekday: byweekday)
let occurrences = rule.getOccurrences()

To do

• Hourly
• Minutely
• Secondly

Author

sdq

License

MIT

rrule.swift's Issues

Weekly doesn't seem to be working

It appears weekly is working like daily. If I provided a start date 1/1/2020 and end date 2/1/2020 and select weekly it spits out every day in between. I would have assumed it would spit out 1/1, 1/8/, 1/15 etc. Is there something I am doing wrong?

Init from String?

Thanks for a great lib! Are there any plans to initialize a rule from string like "RRULE:FREQ=MONTHLY;DTSTART=20160404T021000Z;COUNT=5;INTERVAL=2;WKST=MO;BYDAY=MO,TU" ?

I used https://github.com/teambition/RRuleSwift, but unfortunately it uses JS bridging and not thread safe. This lib looks much better

Wrong Daily reccurrence generating between

the repeating is daily count 5 from 24.06.2019 and last instance is on 28.06.2019
but the result of rule.getOccurrencesBetween return 5 occurrences from 28.06.2019

func customRuleGenerator() {
        let appointentStart = "24.06.2019"
        
        let windowStart = "28.06.2019"
        let windowEnd = "28.09.2019"
        
        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "dd.MM.yyyy"
        
        let rule = getRule(for: dateFormatter.date(from: appointentStart)!)
        let occurrences = rule.getOccurrencesBetween(beginDate: dateFormatter.date(from: windowStart)!, endDate: dateFormatter.date(from: windowEnd)!)
        
        print(occurrences)
        
    }
    
    func getRule( for start: Date) -> rrule {
        //frequency
        let rrulefrequency: RruleFrequency = .daily
        
        //dtstart
        let rruledtstart = start
        
        //until
        let rruleuntil: Date? = nil
        
        //count
        var rrulecount: Int? = 5

        //interval
        var rruleinterval: Int = 1

        //wkst
        let rrulewkst = 1 //TODO: implement week start
        
        //byweekday
        let rrulebyweekday: [Int] = []
        
        //byweekno
        let rrulebyweekno: [Int] = []
        
        //bymonth
        let rrulebymonth: [Int] = []
        
        //bymonthday
        let rrulebymonthday: [Int] = [] // if monthly and there is no weekDays
        
        //byyearday
        let rrulebyyearday: [Int] = []
        
        //bysetpos
        let rrulebysetpos: [Int] = []
        
        let rule = rrule(frequency: rrulefrequency, dtstart: rruledtstart, until: rruleuntil, count: rrulecount, interval: rruleinterval, wkst: rrulewkst, bysetpos: rrulebysetpos, bymonth: rrulebymonth, bymonthday: rrulebymonthday, byyearday: rrulebyyearday, byweekno: rrulebyweekno, byweekday: rrulebyweekday, byhour: [], byminute: [], bysecond: [])
        
        return rule
    }

Occurrence Issue with non-Gregorian calendar, i.e. Buddhist Calendar

Will it support Buddhist Calendar?