(Unicode C++) Update a Task's Status to "completed"

Demonstrates how to update a Google task's status to "completed".

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#include <CkFileAccessW.h>
#include <CkHttpW.h>
#include <CkJsonObjectW.h>
#include <CkHttpResponseW.h>

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

    // Get the previously obtained access token.
    // See Get Google Tasks Access Token.

    CkFileAccessW fac;
    const wchar_t *accessToken = fac.readEntireTextFile(L"qa_data/tokens/googleTasks.txt",L"utf-8");
    if (fac.get_LastMethodSuccess() != true) {
        wprintf(L"%s\n",fac.lastErrorText());
        return;
    }

    bool success;
    CkHttpW http;

    http.put_AuthToken(accessToken);

    const wchar_t *taskId = L"MDM4MzQ4NTA3NDQwMDUxMzQ2OTQ6NzAwOTA4MDA1NzU2ODYwMzoyMDg3OTcyMDA1MTQ5NTA0";

    // Create the JSON to update the task status to completed.
    CkJsonObjectW json;
    json.UpdateString(L"id",taskId);
    json.UpdateString(L"status",L"completed");

    // Specify the ID's for both the task list and the task.
    http.SetUrlVar(L"tasklist",L"MDM4MzQ4NTA3NDQwMDUxMzQ2OTQ6NzAwOTA4MDA1NzU2ODYwMzow");
    http.SetUrlVar(L"task",taskId);

    const wchar_t *url = L"https://www.googleapis.com/tasks/v1/lists/{$tasklist}/tasks/{$task}";
    CkHttpResponseW *resp = http.PText(L"PUT",url,json.emit(),L"utf-8",L"application/json",false,false);
    if (http.get_LastMethodSuccess() == false) {
        wprintf(L"%s\n",http.lastErrorText());
        return;
    }

    // Show the response body.
    wprintf(L"%s\n",resp->bodyStr());

    // Examine the response status code.
    wprintf(L"response status code: %d\n",resp->get_StatusCode());

    delete resp;

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

    // 
    // {
    //  "kind": "tasks#task",
    //  "id": "MDM4MzQ4NTA3NDQwMDUxMzQ2OTQ6NzAwOTA4MDA1NzU2ODYwMzoyMDg3OTcyMDA1MTQ5NTA0",
    //  "etag": "\"84_7Cubo3y98GMV9bE3zQclHxhc/MTQyMDUzMzQ4MA\"",
    //  "title": "Get haircut",
    //  "updated": "2019-04-04T18:07:58.000Z",
    //  "selfLink": "https://www.googleapis.com/tasks/v1/lists/MDM4MzQ4NTA3NDQwMDUxMzQ2OTQ6NzAwOTA4MDA1NzU2ODYwMzow/tasks/MDM4MzQ4NTA3NDQwMDUxMzQ2OTQ6NzAwOTA4MDA1NzU2ODYwMzoyMDg3OTcyMDA1MTQ5NTA0",
    //  "position": "00000000001610612734",
    //  "notes": "Check in online first.",
    //  "status": "completed",
    //  "completed": "2019-04-04T18:38:56.000Z"
    // }
    // 
    // response status code: 200
    }