(Unicode C) WhatsApp - Send a Text Message

Demonstrates how to use the messages endpoint to send text messages to your customers.

For more information, see https://developers.facebook.com/docs/whatsapp/api/messages/text

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#include <C_CkHttpW.h>
#include <C_CkJsonObjectW.h>
#include <C_CkHttpResponseW.h>
#include <C_CkStringBuilderW.h>

void ChilkatSample(void)
    {
    HCkHttpW http;
    BOOL success;
    HCkJsonObjectW json;
    HCkHttpResponseW resp;
    HCkStringBuilderW sbResponseBody;
    HCkJsonObjectW jResp;
    int respStatusCode;
    const wchar_t *id;
    int i;
    int count_i;

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

    http = CkHttpW_Create();

    // Implements the following CURL command:

    // curl -X POST https://example.com/v1/messages \
    //   -H "Authorization: Bearer your-auth-token" \
    //   -d '
    // {
    //     "preview_url": false,
    //     "recipient_type": "individual",
    //     "to": "whatsapp-id-or-group-id",
    //     "type": "text",
    //     "text": {
    //         "body": "your-text-message-content"
    //     }
    // }'

    // Use the following online tool to generate HTTP code from a CURL command
    // Convert a cURL Command to HTTP Source Code

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

    // The following JSON is sent in the request body.

    // {
    //   "preview_url": false,
    //   "recipient_type": "individual",
    //   "to": "whatsapp-id-or-group-id",
    //   "type": "text",
    //   "text": {
    //     "body": "your-text-message-content"
    //   }
    // }

    json = CkJsonObjectW_Create();
    CkJsonObjectW_UpdateBool(json,L"preview_url",FALSE);
    CkJsonObjectW_UpdateString(json,L"recipient_type",L"individual");
    CkJsonObjectW_UpdateString(json,L"to",L"whatsapp-id-or-group-id");
    CkJsonObjectW_UpdateString(json,L"type",L"text");
    CkJsonObjectW_UpdateString(json,L"text.body",L"your-text-message-content");

    // Adds the "Authorization: Bearer your-auth-token" header.
    CkHttpW_putAuthToken(http,L"your-auth-token");

    resp = CkHttpW_PostJson3(http,L"https://example.com/v1/messages",L"application/json",json);
    if (CkHttpW_getLastMethodSuccess(http) == FALSE) {
        wprintf(L"%s\n",CkHttpW_lastErrorText(http));
        CkHttpW_Dispose(http);
        CkJsonObjectW_Dispose(json);
        return;
    }

    sbResponseBody = CkStringBuilderW_Create();
    CkHttpResponseW_GetBodySb(resp,sbResponseBody);
    jResp = CkJsonObjectW_Create();
    CkJsonObjectW_LoadSb(jResp,sbResponseBody);
    CkJsonObjectW_putEmitCompact(jResp,FALSE);

    wprintf(L"Response Body:\n");
    wprintf(L"%s\n",CkJsonObjectW_emit(jResp));

    respStatusCode = CkHttpResponseW_getStatusCode(resp);
    wprintf(L"Response Status Code = %d\n",respStatusCode);
    if (respStatusCode >= 400) {
        wprintf(L"Response Header:\n");
        wprintf(L"%s\n",CkHttpResponseW_header(resp));
        wprintf(L"Failed.\n");
        CkHttpResponseW_Dispose(resp);
        CkHttpW_Dispose(http);
        CkJsonObjectW_Dispose(json);
        CkStringBuilderW_Dispose(sbResponseBody);
        CkJsonObjectW_Dispose(jResp);
        return;
    }

    CkHttpResponseW_Dispose(resp);

    // Sample JSON response:
    // (Sample code for parsing the JSON response is shown below)

    // {
    //   "messages": [
    //     {
    //       "id": "gBEGkYiEB1VXAglK1ZEqA1YKPrU"
    //     }
    //   ]
    // }

    // Sample code for parsing the JSON response...
    // Use the following online tool to generate parsing code from sample JSON:
    // Generate Parsing Code from JSON

    // Chilkat functions returning "const char *" return a pointer to temporary internal memory owned and managed by Chilkat.
    // See this example explaining how this memory should be used: const char * functions.

    i = 0;
    count_i = CkJsonObjectW_SizeOfArray(jResp,L"messages");
    while (i < count_i) {
        CkJsonObjectW_putI(jResp,i);
        id = CkJsonObjectW_stringOf(jResp,L"messages[i].id");
        i = i + 1;
    }



    CkHttpW_Dispose(http);
    CkJsonObjectW_Dispose(json);
    CkStringBuilderW_Dispose(sbResponseBody);
    CkJsonObjectW_Dispose(jResp);

    }