(C) Firebase PATCH - Updating Data

Uses the PATCH method to update record with new information. The data used in this example is at Chilkat Firebase Pigs Database, and is shown here:

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#include <C_CkFileAccess.h>
#include <C_CkRest.h>
#include <C_CkAuthGoogle.h>
#include <C_CkJsonObject.h>

void ChilkatSample(void)
    {
    HCkFileAccess fac;
    const char *accessToken;
    HCkRest rest;
    BOOL success;
    HCkAuthGoogle authGoogle;
    HCkJsonObject pigNameUpdate;
    const char *jsonResponse;

    // Uses the PATCH method to update a Firebase record.

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

    // This example assumes a JWT authentication token, if required, has been previously obtained.
    // See Get Firebase Access Token from JSON Service Account Private Key for sample code.

    // Load the previously obtained Firebase access token into a string.
    fac = CkFileAccess_Create();
    accessToken = CkFileAccess_readEntireTextFile(fac,"qa_data/tokens/firebaseToken.txt","utf-8");
    if (CkFileAccess_getLastMethodSuccess(fac) != TRUE) {
        printf("%s\n",CkFileAccess_lastErrorText(fac));
        CkFileAccess_Dispose(fac);
        return;
    }

    rest = CkRest_Create();

    // Make the initial connection (without sending a request yet).
    // Once connected, any number of requests may be sent.  It is not necessary to explicitly
    // call Connect before each request.  
    success = CkRest_Connect(rest,"chilkat.firebaseio.com",443,TRUE,TRUE);
    if (success != TRUE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkFileAccess_Dispose(fac);
        CkRest_Dispose(rest);
        return;
    }

    authGoogle = CkAuthGoogle_Create();
    CkAuthGoogle_putAccessToken(authGoogle,accessToken);
    CkRest_SetAuthGoogle(rest,authGoogle);

    // Chilkat's sample data (pig-rescue data) is publicly readable at: https://chilkat.firebaseio.com/.json
    // This data is publicly readable, but not writable.  You'll need to 
    // run against your own database..

    // We're going to update "Molly II" to "Molly III"
    pigNameUpdate = CkJsonObject_Create();
    CkJsonObject_AppendString(pigNameUpdate,"name","Molly III");

    // The string content of the last arg passed is  {"name":"Molly III"} 
    jsonResponse = CkRest_fullRequestString(rest,"PATCH","/pig-rescue/animal/-KI3bD-FU_Dake7sYOiP.json",CkJsonObject_emit(pigNameUpdate));
    if (CkRest_getLastMethodSuccess(rest) != TRUE) {
        // Something happened in the communications (either no request was sent, or no response was received.
        // (The Chilkat REST API also has lower-level methods where an app can send the request in one call,
        // and then receive the response in another call.)
        printf("%s\n",CkRest_lastErrorText(rest));
        CkFileAccess_Dispose(fac);
        CkRest_Dispose(rest);
        CkAuthGoogle_Dispose(authGoogle);
        CkJsonObject_Dispose(pigNameUpdate);
        return;
    }

    // Check the response status code.   A 200 response status indicates success.
    if (CkRest_getResponseStatusCode(rest) != 200) {
        printf("%s\n",CkRest_responseStatusText(rest));
        printf("%s\n",jsonResponse);
        printf("Failed.\n");
        CkFileAccess_Dispose(fac);
        CkRest_Dispose(rest);
        CkAuthGoogle_Dispose(authGoogle);
        CkJsonObject_Dispose(pigNameUpdate);
        return;
    }

    // When successful, the response contains the data written.
    printf("%s\n",jsonResponse);
    printf("Success.\n");


    CkFileAccess_Dispose(fac);
    CkRest_Dispose(rest);
    CkAuthGoogle_Dispose(authGoogle);
    CkJsonObject_Dispose(pigNameUpdate);

    }