(Swift 3,4,5...) JSON Date Parsing

Demonstrates how to parse date/time strings from JSON.

Note: This example uses the DtOf and DateOf methods introduced in Chilkat v9.5.0.73

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func chilkatTest() {
    var success: Bool

    let json = CkoJsonObject()!
    json.emitCompact = false

    // First, let's create JSON containing some date/time strings.
    json.update("test.timestamp", value: "2018-01-30T20:35:00Z")
    json.update("test.rfc822", value: "Tue, 24 Apr 2018 08:47:03 -0500")
    json.update("test.dateStrings[0]", value: "2018-01-30T20:35:00Z")
    json.update("test.dateStrings[1]", value: "Tue, 24 Apr 2018 08:47:03 -0500")
    json.updateNumber("test.StartLoggingTime", numericStr: "1446834998.695")
    json.updateNumber("test.Expiration", numericStr: "1442877512.0")
    json.updateInt("test.StartTime", value: 1518867432)

    print("\(json.emit()!)")

    // We've built the following JSON:

    // {
    //   "test": {
    //     "timestamp": "2018-01-30T20:35:00Z",
    //     "rfc822": "Tue, 24 Apr 2018 08:47:03 -0500",
    //     "dateStrings": [
    //       "2018-01-30T20:35:00Z",
    //       "Tue, 24 Apr 2018 08:47:03 -0500"
    //     ],
    //     "StartLoggingTime": 1446834998.695,
    //     "Expiration": 1442877512.0,
    //     "StartTime": 1518867432
    //   }
    // }

    // Use the DateOf and DtOf methods to load Chilkat date/time objects with the date/time values.
    // The CkDateTime object is primarily for loading a date/time from numerous formats, and then getting
    // the date/time in various formats.  Thus, it's primarly for date/time format conversion.
    // The DtObj object holds a date/time where the individual components (day, month, year, hour, minutes, etc.) are 
    // immediately accessible as integers.
    let dateTime = CkoDateTime()!
    let dt = CkoDtObj()!
    var getAsLocal: Bool = false

    // Load the date/time at test.timestamp into the dateTime object.
    success = json.date(of: "test.timestamp", dateTime: dateTime)
    print("\(dateTime.getAsTimestamp(getAsLocal)!)")
    print("\(dateTime.getAsUnixTime(false))")
    print("\(dateTime.getAsRfc822(getAsLocal)!)")

    success = json.date(of: "test.rfc822", dateTime: dateTime)
    print("\(dateTime.getAsTimestamp(getAsLocal)!)")

    json.i = 0
    success = json.date(of: "test.dateStrings[i]", dateTime: dateTime)
    print("\(dateTime.getAsTimestamp(getAsLocal)!)")

    json.i = 1
    success = json.date(of: "test.dateStrings[i]", dateTime: dateTime)
    print("\(dateTime.getAsTimestamp(getAsLocal)!)")

    success = json.date(of: "test.StartLoggingTime", dateTime: dateTime)
    print("\(dateTime.getAsTimestamp(getAsLocal)!)")

    success = json.date(of: "test.Expiration", dateTime: dateTime)
    print("\(dateTime.getAsTimestamp(getAsLocal)!)")

    success = json.date(of: "test.StartTime", dateTime: dateTime)
    print("\(dateTime.getAsTimestamp(getAsLocal)!)")

    // Output so far:

    // 	2018-01-30T20:35:00Z
    // 	1517344500
    // 	Tue, 30 Jan 2018 20:35:00 GMT
    // 	2018-04-24T13:47:03Z
    // 	2018-01-30T20:35:00Z
    // 	2018-04-24T13:47:03Z
    // 	2015-11-07T00:36:38Z
    // 	2015-09-22T04:18:32Z
    // 	2018-02-17T17:37:12Z

    // Now load the date/time strings into the dt object:
    success = json.dt(of: "test.timestamp", bLocal: getAsLocal, dt: dt)
    print("month=\(dt.month.intValue), day=\(dt.day.intValue), year=\(dt.year.intValue), hour=\(dt.hour.intValue), minute=\(dt.minute.intValue)")

    success = json.dt(of: "test.rfc822", bLocal: getAsLocal, dt: dt)
    print("month=\(dt.month.intValue), day=\(dt.day.intValue), year=\(dt.year.intValue), hour=\(dt.hour.intValue), minute=\(dt.minute.intValue)")

    json.i = 0
    success = json.dt(of: "test.dateStrings[i]", bLocal: getAsLocal, dt: dt)
    print("month=\(dt.month.intValue), day=\(dt.day.intValue), year=\(dt.year.intValue), hour=\(dt.hour.intValue), minute=\(dt.minute.intValue)")

    json.i = 1
    success = json.dt(of: "test.dateStrings[i]", bLocal: getAsLocal, dt: dt)
    print("month=\(dt.month.intValue), day=\(dt.day.intValue), year=\(dt.year.intValue), hour=\(dt.hour.intValue), minute=\(dt.minute.intValue)")

    success = json.dt(of: "test.StartLoggingTime", bLocal: getAsLocal, dt: dt)
    print("month=\(dt.month.intValue), day=\(dt.day.intValue), year=\(dt.year.intValue), hour=\(dt.hour.intValue), minute=\(dt.minute.intValue)")

    success = json.dt(of: "test.Expiration", bLocal: getAsLocal, dt: dt)
    print("month=\(dt.month.intValue), day=\(dt.day.intValue), year=\(dt.year.intValue), hour=\(dt.hour.intValue), minute=\(dt.minute.intValue)")

    success = json.dt(of: "test.StartTime", bLocal: getAsLocal, dt: dt)
    print("month=\(dt.month.intValue), day=\(dt.day.intValue), year=\(dt.year.intValue), hour=\(dt.hour.intValue), minute=\(dt.minute.intValue)")

    // Output:

    // month=1, day=30, year=2018, hour=20, minute=35
    // month=4, day=24, year=2018, hour=13, minute=47
    // month=1, day=30, year=2018, hour=20, minute=35
    // month=4, day=24, year=2018, hour=13, minute=47
    // month=11, day=6, year=2015, hour=18, minute=36
    // month=9, day=21, year=2015, hour=23, minute=18
    // month=2, day=17, year=2018, hour=11, minute=37

}