Unicode C Google Calendar: Change the Color of an Event

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Changes the color of a particular event. The calendar and event are specified by ID. This example changes the color for an event (id = 52e7uk7j7vl5dosj7b25memov0) on the calendar (id = support@chilkatcloud.com).
This changes the event to colorId = "6" which seems to be an orange-ish color..

Documentation: https://developers.google.com/google-apps/calendar/v3/reference/events/patch

#include <C_CkRestW.h>
#include <C_CkOAuth2W.h>
#include <C_CkJsonObjectW.h>
#include <C_CkStringBuilderW.h>

void ChilkatSample(void)
    {
    HCkRestW rest;
    BOOL success;
    HCkOAuth2W oauth2;
    HCkJsonObjectW jsonReq;
    HCkStringBuilderW sbReq;
    HCkStringBuilderW sbJson;
    HCkJsonObjectW json;
    const wchar_t *kind;
    const wchar_t *etag;
    const wchar_t *id;
    const wchar_t *status;
    const wchar_t *htmlLink;
    const wchar_t *created;
    const wchar_t *updated;
    const wchar_t *summary;
    const wchar_t *colorId;
    const wchar_t *creatorEmail;
    BOOL creatorSelf;
    const wchar_t *organizerEmail;
    BOOL organizerSelf;
    const wchar_t *startDateTime;
    const wchar_t *endDateTime;
    const wchar_t *iCalUID;
    int sequence;
    const wchar_t *hangoutLink;
    BOOL remindersUseDefault;

    rest = CkRestW_Create();

    //   Provide a previously obtained OAuth2 access token.
    oauth2 = CkOAuth2W_Create();
    CkOAuth2W_putAccessToken(oauth2,L"OAUTH2_ACCESS_TOKEN");
    CkRestW_SetAuthOAuth2(rest,oauth2);

    success = CkRestW_Connect(rest,L"www.googleapis.com",443,TRUE,TRUE);
    if (success != TRUE) {
        wprintf(L"%s\n",CkRestW_lastErrorText(rest));
        CkRestW_Dispose(rest);
        CkOAuth2W_Dispose(oauth2);
        return;
    }

    //  The following code creates the JSON request body.
    //  The JSON created by this code is shown below.
    jsonReq = CkJsonObjectW_Create();
    CkJsonObjectW_UpdateString(jsonReq,L"colorId",L"6");

    sbReq = CkStringBuilderW_Create();
    CkJsonObjectW_EmitSb(jsonReq,sbReq);

    CkRestW_AddHeader(rest,L"Content-Type",L"application/json");

    sbJson = CkStringBuilderW_Create();
    success = CkRestW_FullRequestSb(rest,L"PATCH",L"/calendar/v3/calendars/support@chilkatcloud.com/events/52e7uk7j7vl5dosj7b25memov0",sbReq,sbJson);
    if (success != TRUE) {
        wprintf(L"%s\n",CkRestW_lastErrorText(rest));
        CkRestW_Dispose(rest);
        CkOAuth2W_Dispose(oauth2);
        CkJsonObjectW_Dispose(jsonReq);
        CkStringBuilderW_Dispose(sbReq);
        CkStringBuilderW_Dispose(sbJson);
        return;
    }

    if (CkRestW_getResponseStatusCode(rest) != 200) {
        wprintf(L"Received error response code: %d\n",CkRestW_getResponseStatusCode(rest));
        wprintf(L"Response body:\n");
        wprintf(L"%s\n",CkStringBuilderW_getAsString(sbJson));
        CkRestW_Dispose(rest);
        CkOAuth2W_Dispose(oauth2);
        CkJsonObjectW_Dispose(jsonReq);
        CkStringBuilderW_Dispose(sbReq);
        CkStringBuilderW_Dispose(sbJson);
        return;
    }

    json = CkJsonObjectW_Create();
    CkJsonObjectW_LoadSb(json,sbJson);

    //  The following code parses the JSON response.
    //  A sample JSON response is shown below the sample code.

    kind = CkJsonObjectW_stringOf(json,L"kind");
    etag = CkJsonObjectW_stringOf(json,L"etag");
    id = CkJsonObjectW_stringOf(json,L"id");
    status = CkJsonObjectW_stringOf(json,L"status");
    htmlLink = CkJsonObjectW_stringOf(json,L"htmlLink");
    created = CkJsonObjectW_stringOf(json,L"created");
    updated = CkJsonObjectW_stringOf(json,L"updated");
    summary = CkJsonObjectW_stringOf(json,L"summary");
    colorId = CkJsonObjectW_stringOf(json,L"colorId");
    creatorEmail = CkJsonObjectW_stringOf(json,L"creator.email");
    creatorSelf = CkJsonObjectW_BoolOf(json,L"creator.self");
    organizerEmail = CkJsonObjectW_stringOf(json,L"organizer.email");
    organizerSelf = CkJsonObjectW_BoolOf(json,L"organizer.self");
    startDateTime = CkJsonObjectW_stringOf(json,L"start.dateTime");
    endDateTime = CkJsonObjectW_stringOf(json,L"end.dateTime");
    iCalUID = CkJsonObjectW_stringOf(json,L"iCalUID");
    sequence = CkJsonObjectW_IntOf(json,L"sequence");
    hangoutLink = CkJsonObjectW_stringOf(json,L"hangoutLink");
    remindersUseDefault = CkJsonObjectW_BoolOf(json,L"reminders.useDefault");

    wprintf(L"Example Completed.\n");


    CkRestW_Dispose(rest);
    CkOAuth2W_Dispose(oauth2);
    CkJsonObjectW_Dispose(jsonReq);
    CkStringBuilderW_Dispose(sbReq);
    CkStringBuilderW_Dispose(sbJson);
    CkJsonObjectW_Dispose(json);

    }

Sample JSON Request Body

{
    "colorId": "6"
}

Sample JSON Response Body

{
  "kind": "calendar#event",
  "etag": "\"3021538600038000\"",
  "id": "52e7uk7j7vl5dosj7b25memov0",
  "status": "confirmed",
  "htmlLink": "https://www.google.com/calendar/event?eid=NTJlN3VrN2o3dmw1ZG9zajdiMjVtZW1vdjAgc3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t",
  "created": "2017-11-08T21:27:50.000Z",
  "updated": "2017-11-15T18:08:20.019Z",
  "summary": "Dentist Appointment",
  "colorId": "6",
  "creator": {
    "email": "support@chilkatcloud.com",
    "self": true
  },
  "organizer": {
    "email": "support@chilkatcloud.com",
    "self": true
  },
  "start": {
    "dateTime": "2017-11-27T10:30:00-06:00"
  },
  "end": {
    "dateTime": "2017-11-27T11:30:00-06:00"
  },
  "iCalUID": "52e7uk7j7vl5dosj7b25memov0@google.com",
  "sequence": 1,
  "hangoutLink": "https://plus.google.com/hangouts/_/chilkatcloud.com/support?hceid=c3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t.52e7uk7j7vl5dosj7b25memov0",
  "reminders": {
    "useDefault": true
  }
}