(Swift 3,4,5...) MS Graph Calendar Create Event

Creates a new event in a specified calendar.

For more details, see https://docs.microsoft.com/en-us/graph/api/calendar-post-events?view=graph-rest-1.0

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func chilkatTest() {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    let http = CkoHttp()!

    // Use your previously obtained access token as shown here:
    //    Get Microsoft Graph OAuth2 Access Token with Calendars.ReadWrite scope.

    let jsonToken = CkoJsonObject()!
    var success: Bool = jsonToken.loadFile("qa_data/tokens/msGraphCalendar.json")
    if success == false {
        print("\(jsonToken.lastErrorText!)")
        return
    }

    http.authToken = jsonToken.string(of: "access_token")

    // Create a JSON body for the HTTP POST
    // Use this online tool to generate the code from sample JSON: 
    // Generate Code to Create JSON

    // {
    //   "subject": "Let's go for lunch",
    //   "body": {
    //     "contentType": "HTML",
    //     "content": "Does mid month work for you?"
    //   },
    //   "start": {
    //       "dateTime": "2019-11-15T12:00:00",
    //       "timeZone": "Pacific Standard Time"
    //   },
    //   "end": {
    //       "dateTime": "2019-11-15T14:00:00",
    //       "timeZone": "Pacific Standard Time"
    //   },
    //   "location":{
    //       "displayName":"Harry's Bar"
    //   },
    //   "attendees": [
    //     {
    //       "emailAddress": {
    //         "address":"adelev@contoso.onmicrosoft.com",
    //         "name": "Adele Vance"
    //       },
    //       "type": "required"
    //     }
    //   ]
    // }

    let json = CkoJsonObject()!
    json.update("subject", value: "Let's go for lunch")
    json.update("body.contentType", value: "HTML")
    json.update("body.content", value: "Does mid month work for you?")
    json.update("start.dateTime", value: "2019-11-15T12:00:00")
    json.update("start.timeZone", value: "Pacific Standard Time")
    json.update("end.dateTime", value: "2019-11-15T14:00:00")
    json.update("end.timeZone", value: "Pacific Standard Time")
    json.update("location.displayName", value: "Harry's Bar")
    json.update("attendees[0].emailAddress.address", value: "adelev@contoso.onmicrosoft.com")
    json.update("attendees[0].emailAddress.name", value: "Adele Vance")
    json.update("attendees[0].type", value: "required")

    // POST the JSON to https://graph.microsoft.com/v1.0/me/calendars/{id}/events
    // This is posting to a calendar in the default calendarGroup.

    // Specify the calendar id
    http.setUrlVar("id", value: "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAgEGAAAA5_vF7TKKdE6bGCRqXyl2PQAClEpRTgAAAA==")
    var resp: CkoHttpResponse? = http.postJson3("https://graph.microsoft.com/v1.0/me/calendars/{$id}/events", contentType: "application/json", json: json)
    if http.lastMethodSuccess == false {
        print("\(http.lastErrorText!)")
        return
    }

    json.load(resp!.bodyStr)
    json.emitCompact = false

    if resp!.statusCode.intValue != 201 {
        print("\(json.emit()!)")
        print("Failed, response status code = \(resp!.statusCode.intValue)")
        resp = nil
        return
    }

    resp = nil

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

    // A sample response:
    // (See code for parsing this response below..)

    // {
    //   "@odata.context": "https://graph.microsoft.com/v1.0/$metadata#users('admin%40chilkat.io')/calendars('AQMkADAwATM0MDAAMS ... AClEpRTgAAAA%3D%3D')/events/$entity",
    //   "@odata.etag": "W/\"5+vF7TKKdE6bGCRqXyl2PQAClIgmmw==\"",
    //   "id": "AQMkADAwAT ... ApRZ7JkAAAA=",
    //   "createdDateTime": "2019-04-26T14:31:39.8791929Z",
    //   "lastModifiedDateTime": "2019-04-26T14:31:41.2753537Z",
    //   "changeKey": "5+vF7TKKdE6bGCRqXyl2PQAClIgmmw==",
    //   "categories": [
    //   ],
    //   "originalStartTimeZone": "Pacific Standard Time",
    //   "originalEndTimeZone": "Pacific Standard Time",
    //   "iCalUId": "040000008200E00074C5B7101A82E00800000000F05DF1C23CFCD40100000000000000001000000009911D155F71EF42A230FEBFE5F7486A",
    //   "reminderMinutesBeforeStart": 15,
    //   "isReminderOn": true,
    //   "hasAttachments": false,
    //   "subject": "Let's go for lunch",
    //   "bodyPreview": "Does mid month work for you?",
    //   "importance": "normal",
    //   "sensitivity": "normal",
    //   "isAllDay": false,
    //   "isCancelled": false,
    //   "isOrganizer": true,
    //   "responseRequested": true,
    //   "seriesMasterId": null,
    //   "showAs": "busy",
    //   "type": "singleInstance",
    //   "webLink": "https://outlook.live.com/owa/?itemid=AQMkADAwATM0MDAAMS1iNTcwL...pRZ7JkAAAA%3D&exvsurl=1&path=/calendar/item",
    //   "onlineMeetingUrl": null,
    //   "recurrence": null,
    //   "responseStatus": {
    //     "response": "organizer",
    //     "time": "0001-01-01T00:00:00Z"
    //   },
    //   "body": {
    //     "contentType": "html",
    //     "content": "<html>\r\n<head>\r\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\">\r\n<meta content=\"text/html; charset=us-ascii\">\r\n</head>\r\n<body>\r\nDoes mid month work for you?\r\n</body>\r\n</html>\r\n"
    //   },
    //   "start": {
    //     "dateTime": "2019-11-15T12:00:00.0000000",
    //     "timeZone": "Pacific Standard Time"
    //   },
    //   "end": {
    //     "dateTime": "2019-11-15T14:00:00.0000000",
    //     "timeZone": "Pacific Standard Time"
    //   },
    //   "location": {
    //     "displayName": "Harry's Bar",
    //     "locationType": "default",
    //     "uniqueId": "Harry's Bar",
    //     "uniqueIdType": "private"
    //   },
    //   "locations": [
    //     {
    //       "displayName": "Harry's Bar",
    //       "locationType": "default",
    //       "uniqueId": "Harry's Bar",
    //       "uniqueIdType": "private"
    //     }
    //   ],
    //   "attendees": [
    //     {
    //       "type": "required",
    //       "status": {
    //         "response": "none",
    //         "time": "0001-01-01T00:00:00Z"
    //       },
    //       "emailAddress": {
    //         "name": "Adele Vance",
    //         "address": "adelev@contoso.onmicrosoft.com"
    //       }
    //     }
    //   ],
    //   "organizer": {
    //     "emailAddress": {
    //       "name": "Matt",
    //       "address": "outlook_3A33FCEB9B74CC15@outlook.com"
    //     }
    //   }
    // }
    // 
    // 

    // Use this online tool to generate parsing code from sample JSON: 
    // Generate Parsing Code from JSON

    var displayName: String?
    var locationType: String?
    var uniqueId: String?
    var uniqueIdType: String?
    var statusResponse: String?
    var statusTime: String?
    var emailAddressName: String?
    var emailAddressAddress: String?

    var odataContext: String? = json.string(of: "\"@odata.context\"")
    var odataEtag: String? = json.string(of: "\"@odata.etag\"")
    var id: String? = json.string(of: "id")
    var createdDateTime: String? = json.string(of: "createdDateTime")
    var lastModifiedDateTime: String? = json.string(of: "lastModifiedDateTime")
    var changeKey: String? = json.string(of: "changeKey")
    var originalStartTimeZone: String? = json.string(of: "originalStartTimeZone")
    var originalEndTimeZone: String? = json.string(of: "originalEndTimeZone")
    var iCalUId: String? = json.string(of: "iCalUId")
    var reminderMinutesBeforeStart: String? = json.int(of: "reminderMinutesBeforeStart").intValue
    var isReminderOn: String? = json.bool(of: "isReminderOn")
    var hasAttachments: String? = json.bool(of: "hasAttachments")
    var subject: String? = json.string(of: "subject")
    var bodyPreview: String? = json.string(of: "bodyPreview")
    var importance: String? = json.string(of: "importance")
    var sensitivity: String? = json.string(of: "sensitivity")
    var isAllDay: String? = json.bool(of: "isAllDay")
    var isCancelled: String? = json.bool(of: "isCancelled")
    var isOrganizer: String? = json.bool(of: "isOrganizer")
    var responseRequested: String? = json.bool(of: "responseRequested")
    var seriesMasterId: String? = json.string(of: "seriesMasterId")
    var showAs: String? = json.string(of: "showAs")
    var type: String? = json.string(of: "type")
    var webLink: String? = json.string(of: "webLink")
    var onlineMeetingUrl: String? = json.string(of: "onlineMeetingUrl")
    var recurrence: String? = json.string(of: "recurrence")
    var responseStatusResponse: String? = json.string(of: "responseStatus.response")
    var responseStatusTime: String? = json.string(of: "responseStatus.time")
    var bodyContentType: String? = json.string(of: "body.contentType")
    var bodyContent: String? = json.string(of: "body.content")
    var startDateTime: String? = json.string(of: "start.dateTime")
    var startTimeZone: String? = json.string(of: "start.timeZone")
    var endDateTime: String? = json.string(of: "end.dateTime")
    var endTimeZone: String? = json.string(of: "end.timeZone")
    var locationDisplayName: String? = json.string(of: "location.displayName")
    var locationLocationType: String? = json.string(of: "location.locationType")
    var locationUniqueId: String? = json.string(of: "location.uniqueId")
    var locationUniqueIdType: String? = json.string(of: "location.uniqueIdType")
    var organizerEmailAddressName: String? = json.string(of: "organizer.emailAddress.name")
    var organizerEmailAddressAddress: String? = json.string(of: "organizer.emailAddress.address")
    var i: Int = 0
    var count_i: Int = json.size(ofArray: "categories").intValue
    while i < count_i {
        json.i = i
        // ...
        i = i + 1
    }

    i = 0
    count_i = json.size(ofArray: "locations").intValue
    while i < count_i {
        json.i = i
        displayName = json.string(of: "locations[i].displayName")
        locationType = json.string(of: "locations[i].locationType")
        uniqueId = json.string(of: "locations[i].uniqueId")
        uniqueIdType = json.string(of: "locations[i].uniqueIdType")
        i = i + 1
    }

    i = 0
    count_i = json.size(ofArray: "attendees").intValue
    while i < count_i {
        json.i = i
        type = json.string(of: "attendees[i].type")
        statusResponse = json.string(of: "attendees[i].status.response")
        statusTime = json.string(of: "attendees[i].status.time")
        emailAddressName = json.string(of: "attendees[i].emailAddress.name")
        emailAddressAddress = json.string(of: "attendees[i].emailAddress.address")
        i = i + 1
    }

    print("Success.")

}