(C) WhatsApp - Send a Previously Uploaded Media Message

Demonstrates how to send a media message where the media content was previously uploaded.

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

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#include <C_CkHttp.h>
#include <C_CkJsonObject.h>
#include <C_CkHttpResponse.h>
#include <C_CkStringBuilder.h>

void ChilkatSample(void)
    {
    HCkHttp http;
    BOOL success;
    HCkJsonObject json;
    HCkHttpResponse resp;
    HCkStringBuilder sbResponseBody;
    HCkJsonObject jResp;
    int respStatusCode;
    const char *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 = CkHttp_Create();

    // Implements the following CURL command:

    // curl -X POST https://example.com/v1/messages \
    //   -H "Authorization: Bearer your-auth-token" \
    //   -d '
    // {
    //     "recipient_type": "individual-or-group",
    //     "to": "whatsapp-id-or-group-id",
    //     "type": "image",
    //     "image": {
    //      "id": "your-media-id",
    //       "caption": "your-image-caption"
    //     }
    // }'

    // 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.

    // {
    //   "recipient_type": "individual-or-group",
    //   "to": "whatsapp-id-or-group-id",
    //   "type": "image",
    //   "image": {
    //     "id": "your-media-id",
    //     "caption": "your-image-caption"
    //   }
    // }

    json = CkJsonObject_Create();
    CkJsonObject_UpdateString(json,"recipient_type","individual-or-group");
    CkJsonObject_UpdateString(json,"to","whatsapp-id-or-group-id");
    CkJsonObject_UpdateString(json,"type","image");
    CkJsonObject_UpdateString(json,"image.id","your-media-id");
    CkJsonObject_UpdateString(json,"image.caption","your-image-caption");

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

    resp = CkHttp_PostJson3(http,"https://example.com/v1/messages","application/json",json);
    if (CkHttp_getLastMethodSuccess(http) == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkJsonObject_Dispose(json);
        return;
    }

    sbResponseBody = CkStringBuilder_Create();
    CkHttpResponse_GetBodySb(resp,sbResponseBody);
    jResp = CkJsonObject_Create();
    CkJsonObject_LoadSb(jResp,sbResponseBody);
    CkJsonObject_putEmitCompact(jResp,FALSE);

    printf("Response Body:\n");
    printf("%s\n",CkJsonObject_emit(jResp));

    respStatusCode = CkHttpResponse_getStatusCode(resp);
    printf("Response Status Code = %d\n",respStatusCode);
    if (respStatusCode >= 400) {
        printf("Response Header:\n");
        printf("%s\n",CkHttpResponse_header(resp));
        printf("Failed.\n");
        CkHttpResponse_Dispose(resp);
        CkHttp_Dispose(http);
        CkJsonObject_Dispose(json);
        CkStringBuilder_Dispose(sbResponseBody);
        CkJsonObject_Dispose(jResp);
        return;
    }

    CkHttpResponse_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 = CkJsonObject_SizeOfArray(jResp,"messages");
    while (i < count_i) {
        CkJsonObject_putI(jResp,i);
        id = CkJsonObject_stringOf(jResp,"messages[i].id");
        i = i + 1;
    }



    CkHttp_Dispose(http);
    CkJsonObject_Dispose(json);
    CkStringBuilder_Dispose(sbResponseBody);
    CkJsonObject_Dispose(jResp);

    }