A missing lightweight task scheduler for Swift

Schedule.after(3.seconds).do {
    print("3 seconds passed!")
}

Schedule.every(1.seconds).do { }

Schedule.after(1.hour, repeating: 1.minute).do { }

Schedule.of(1.second, 2.minutes, 3.hours).do { }

Schedule.at(when).do { }

Schedule.every(.monday, .tuesday).at("9:00:00").do { }

Schedule.every(.september(30)).at(10, 30).do { }

Schedule.every("one month and ten days").do { }

Schedule.of(date0, date1, date2).do { }

import Schedule

/// concat
let s0 = Schedule.at(birthdate)
let s1 = Schedule.every(1.year)
let birthdaySchedule = s0.concat.s1
birthdaySchedule.do { 
    print("Happy birthday")
}

/// merge
let s3 = Schedule.every(.january(1)).at("8:00")
let s4 = Schedule.every(.october(1)).at("9:00 AM")
let holiday = s3.merge(s4)
holidaySchedule.do {
    print("Happy holiday")
}

/// first
let s5 = Schedule.after(5.seconds).concat(Schedule.every(1.day))
let s6 = s5.first(10)

/// until
let s7 = Schedule.every(.monday).at(11, 12)
let s8 = s7.until(date)

Schedule.every("one hour and ten minutes").do { }

Schedule.every("1 hour, 5 minutes and 10 seconds").do { }

Schedule.every(1.second).do(host: self) {
    // do something, and cancel the task when `self` is deallocated.
}

let task = Schedule.every(1.day).do { }

task.suspend()
task.resume()
task.cancel()    // will remove internally held reference of this task

let s = Schedule.every(1.day)
let task0 = s.do(queue: myTaskQueue, tag: "log") { }
let task1 = s.do(queue: myTaskQueue, tag: "log") { }

task0.addTag("database")
task1.removeTag("log")

Task.suspend(byTag: "log")
Task.resume(byTag: "log")
Task.cancel(byTag: "log")

let dailyTask = Schedule.every(1.day)
dailyTask.addAction {
    print("open eyes")
}
dailyTask.addAction {
    print("get up")
}
let key = dailyTask.addAction {
    print("take a shower")
}
dailyTask.removeAction(byKey: key)

let timeline = task.timeline
print(timeline.firstExecution)
print(timeline.lastExecution)
print(timeline.estimatedNextExecution)

task.setLifetime(10.hours)  // will cancel this task after 10 hours
task.addLifetime(1.hours)
task.restOfLifetime == 11.hours

# Podfile
use_frameworks!

target 'YOUR_TARGET_NAME' do
    pod 'Schedule'
end

$ pod install

$ carthage update

dependencies: [
    .package(url: "https://github.com/jianstm/Schedule", .upToNextMinor("0.0.0"))
]

$ swift build