(DataFlex) List Events on a Specified Google Calendar

See more Google Calendar Examples

Demonstrates how to fetch the list of events on a particular Google Calendar. The calendar can be referenced by the calendar ID, or by the keyword "primary".

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-win32.pkg

Procedure Test
Token    Handle hoJsonToken
    Boolean iSuccess
    Handle hoHttp
    Variant vSbResponse
    Handle hoSbResponse
    Handle hoJson
    Integer iNumEvents
    Integer i
    String sTemp1
    Integer iTemp1
    Boolean bTemp1

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

    // This example uses a previously obtained access token having permission for the 
    // Google Calendar scope.

    // In this example, Get Google Calendar OAuth2 Access Token, the access
    // token was saved to a JSON file.  This example fetches the access token from the file..
    Get Create (RefClass(cComChilkatJsonObject)) To hoJsonToken
    If (Not(IsComObjectCreated(hoJsonToken))) Begin
        Send CreateComObject of hoJsonToken
    End
    Get ComLoadFile Of hoJsonToken "qa_data/tokens/googleCalendar.json" To iSuccess
    Get ComHasMember Of hoJsonToken "access_token" To bTemp1
    If (bTemp1 = False) Begin
        Showln "No access token found."
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatHttp)) To hoHttp
    If (Not(IsComObjectCreated(hoHttp))) Begin
        Send CreateComObject of hoHttp
    End
    Get ComStringOf Of hoJsonToken "access_token" To sTemp1
    Set ComAuthToken Of hoHttp To sTemp1

    // Let's get the primary calendar.  A calendar ID could have be used instead of "primary".
    Get ComSetUrlVar Of hoHttp "calendarId" "primary" To iSuccess
    Get Create (RefClass(cComChilkatStringBuilder)) To hoSbResponse
    If (Not(IsComObjectCreated(hoSbResponse))) Begin
        Send CreateComObject of hoSbResponse
    End
    Get pvComObject of hoSbResponse to vSbResponse
    Get ComQuickGetSb Of hoHttp "https://www.googleapis.com/calendar/v3/calendars/{$calendarId}/events" vSbResponse To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoHttp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComLastStatus Of hoHttp To iTemp1
    If (iTemp1 <> 200) Begin
        // Note: If a 401 unauthorized response is received, it likely means that the OAuth2 access token needs
        // to be refreshed or re-fetched.
        Get ComLastStatus Of hoHttp To iTemp1
        Showln "Error response status: " iTemp1
        Get ComGetAsString Of hoSbResponse To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // A sample JSON response:
    // (Code for parsing the Google Calendar events is shown below.)

    // {
    //  "kind": "calendar#events",
    //  "etag": "\"p32cfpufit76da0g\"",
    //  "summary": "support@chilkatcloud.com",
    //  "updated": "2017-08-10T14:00:27.199Z",
    //  "timeZone": "America/Chicago",
    //  "accessRole": "owner",
    //  "defaultReminders": [
    //   {
    //    "method": "popup",
    //    "minutes": 10
    //   }
    //  ],
    //  "nextSyncToken": "CJj8-fLpzNUCEJj8-fLpzNUCGAU=",
    //  "items": [
    //   {
    //    "kind": "calendar#event",
    //    "etag": "\"3004746854620000\"",
    //    "id": "5jt9fopfg3rr9eftegiuq7gc5k",
    //    "status": "confirmed",
    //    "htmlLink": "https://www.google.com/calendar/event?eid=NWp0OWZvcGZnM3JyOWVmdGVnaXVxN2djNWsgc3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t",
    //    "created": "2017-08-10T13:57:07.000Z",
    //    "updated": "2017-08-10T13:57:07.310Z",
    //    "summary": "Run 10 miles",
    //    "creator": {
    //     "email": "support@chilkatcloud.com",
    //     "self": true
    //    },
    //    "organizer": {
    //     "email": "support@chilkatcloud.com",
    //     "self": true
    //    },
    //    "start": {
    //     "dateTime": "2017-08-10T12:00:00-05:00"
    //    },
    //    "end": {
    //     "dateTime": "2017-08-10T13:00:00-05:00"
    //    },
    //    "iCalUID": "5jt9fopfg3rr9eftegiuq7gc5k@google.com",
    //    "sequence": 0,
    //    "hangoutLink": "https://plus.google.com/hangouts/_/chilkatcloud.com/support?hceid=c3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t.5jt9fopfg3rr9eftegiuq7gc5k",
    //    "reminders": {
    //     "useDefault": true
    //    }
    //   },
    //   {
    //    "kind": "calendar#event",
    //    "etag": "\"3004746898118000\"",
    //    "id": "7dvh49vd219r3sq7jdueieu8rc",
    //    "status": "confirmed",
    //    "htmlLink": "https://www.google.com/calendar/event?eid=N2R2aDQ5dmQyMTlyM3NxN2pkdWVpZXU4cmMgc3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t",
    //    "created": "2017-08-10T13:57:29.000Z",
    //    "updated": "2017-08-10T13:57:29.059Z",
    //    "summary": "Eat Giordano's Pizza",
    //    "creator": {
    //     "email": "support@chilkatcloud.com",
    //     "self": true
    //    },
    //    "organizer": {
    //     "email": "support@chilkatcloud.com",
    //     "self": true
    //    },
    //    "start": {
    //     "dateTime": "2017-08-10T15:00:00-05:00"
    //    },
    //    "end": {
    //     "dateTime": "2017-08-10T16:00:00-05:00"
    //    },
    //    "iCalUID": "7dvh49vd219r3sq7jdueieu8rc@google.com",
    //    "sequence": 0,
    //    "hangoutLink": "https://plus.google.com/hangouts/_/chilkatcloud.com/support?hceid=c3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t.7dvh49vd219r3sq7jdueieu8rc",
    //    "reminders": {
    //     "useDefault": true
    //    }
    //   },
    //   {
    //    "kind": "calendar#event",
    //    "etag": "\"3004746915224000\"",
    //    "id": "5btd89ljn07bg3tlgpimcaqrro",
    //    "status": "confirmed",
    //    "htmlLink": "https://www.google.com/calendar/event?eid=NWJ0ZDg5bGpuMDdiZzN0bGdwaW1jYXFycm8gc3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t",
    //    "created": "2017-08-10T13:57:37.000Z",
    //    "updated": "2017-08-10T13:57:37.612Z",
    //    "summary": "Nap",
    //    "creator": {
    //     "email": "support@chilkatcloud.com",
    //     "self": true
    //    },
    //    "organizer": {
    //     "email": "support@chilkatcloud.com",
    //     "self": true
    //    },
    //    "start": {
    //     "dateTime": "2017-08-10T16:30:00-05:00"
    //    },
    //    "end": {
    //     "dateTime": "2017-08-10T17:30:00-05:00"
    //    },
    //    "iCalUID": "5btd89ljn07bg3tlgpimcaqrro@google.com",
    //    "sequence": 0,
    //    "hangoutLink": "https://plus.google.com/hangouts/_/chilkatcloud.com/support?hceid=c3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t.5btd89ljn07bg3tlgpimcaqrro",
    //    "reminders": {
    //     "useDefault": true
    //    }
    //   }
    //  ]
    // }
    // 

    Get Create (RefClass(cComChilkatJsonObject)) To hoJson
    If (Not(IsComObjectCreated(hoJson))) Begin
        Send CreateComObject of hoJson
    End
    Get pvComObject of hoSbResponse to vSbResponse
    Get ComLoadSb Of hoJson vSbResponse To iSuccess

    Get ComSizeOfArray Of hoJson "items" To iNumEvents
    Move 0 To i
    While (i < iNumEvents)
        Set ComI Of hoJson To i
        Get ComStringOf Of hoJson "items[i].summary" To sTemp1
        Showln sTemp1
        Get ComStringOf Of hoJson "items[i].start.dateTime" To sTemp1
        Showln sTemp1
        Get ComStringOf Of hoJson "items[i].end.dateTime" To sTemp1
        Showln sTemp1
        Showln "--"
        Move (i + 1) To i
    Loop

    // Sample output:

    // Run 10 miles
    // 2017-08-10T12:00:00-05:00
    // 2017-08-10T13:00:00-05:00
    // --
    // Eat Giordano's Pizza
    // 2017-08-10T15:00:00-05:00
    // 2017-08-10T16:00:00-05:00
    // --
    // Nap
    // 2017-08-10T16:30:00-05:00
    // 2017-08-10T17:30:00-05:00
    // --
    // 


End_Procedure