(C) Google Contacts - Delete a Contact

Demonstrates how to delete a Google Contact.

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#include <C_CkJsonObject.h>
#include <C_CkAuthGoogle.h>
#include <C_CkRest.h>
#include <C_CkStringBuilder.h>
#include <C_CkXml.h>

void ChilkatSample(void)
    {
    HCkJsonObject jsonToken;
    BOOL success;
    HCkAuthGoogle gAuth;
    HCkRest rest;
    BOOL bAutoReconnect;
    HCkStringBuilder sbPath;
    int numReplacements;
    HCkStringBuilder sbResponseBody;
    HCkXml xml;
    const char *lastKnownEtag;

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

    // --------------------------------------------------------------------------------------------------------
    // Note: The code for setting up the Chilkat REST object and making the initial connection can be done once.
    // Once connected, the REST object may be re-used for many REST API calls.
    // (It's a good idea to put the connection setup code in a separate function/subroutine.)
    // --------------------------------------------------------------------------------------------------------

    // It is assumed we previously obtained an OAuth2 access token.
    // This example loads the JSON access token file 
    // saved by this example: Get Google Contacts OAuth2 Access Token

    jsonToken = CkJsonObject_Create();
    success = CkJsonObject_LoadFile(jsonToken,"qa_data/tokens/googleContacts.json");
    if (success != TRUE) {
        printf("Failed to load googleContacts.json\n");
        CkJsonObject_Dispose(jsonToken);
        return;
    }

    gAuth = CkAuthGoogle_Create();
    CkAuthGoogle_putAccessToken(gAuth,CkJsonObject_stringOf(jsonToken,"access_token"));

    rest = CkRest_Create();

    // Connect using TLS.
    bAutoReconnect = TRUE;
    success = CkRest_Connect(rest,"www.google.com",443,TRUE,bAutoReconnect);

    // Provide the authentication credentials (i.e. the access token)
    CkRest_SetAuthGoogle(rest,gAuth);

    // ----------------------------------------------
    // OK, the REST connection setup is completed..
    // ----------------------------------------------

    // To update a contact, we'll first get the contact information
    // to get the etag.

    // To retrieve the contact, send the following:
    // 	GET /m8/feeds/contacts/default/full/{contactId}
    // 	GData-Version: 3.0

    CkRest_AddHeader(rest,"GData-Version","3.0");

    sbPath = CkStringBuilder_Create();
    CkStringBuilder_Append(sbPath,"/m8/feeds/contacts/default/full/{contactId}");
    // Get the contact having contactId = "5b6d64980b1ed462"
    numReplacements = CkStringBuilder_Replace(sbPath,"{contactId}","5b6d64980b1ed462");

    sbResponseBody = CkStringBuilder_Create();
    success = CkRest_FullRequestNoBodySb(rest,"GET",CkStringBuilder_getAsString(sbPath),sbResponseBody);
    if (success != TRUE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkJsonObject_Dispose(jsonToken);
        CkAuthGoogle_Dispose(gAuth);
        CkRest_Dispose(rest);
        CkStringBuilder_Dispose(sbPath);
        CkStringBuilder_Dispose(sbResponseBody);
        return;
    }

    // A successful response will have a status code equal to 200.
    if (CkRest_getResponseStatusCode(rest) != 200) {
        printf("response status code = %d\n",CkRest_getResponseStatusCode(rest));
        printf("response status text = %s\n",CkRest_responseStatusText(rest));
        printf("response header: %s\n",CkRest_responseHeader(rest));
        printf("response body: %s\n",CkStringBuilder_getAsString(sbResponseBody));
        CkJsonObject_Dispose(jsonToken);
        CkAuthGoogle_Dispose(gAuth);
        CkRest_Dispose(rest);
        CkStringBuilder_Dispose(sbPath);
        CkStringBuilder_Dispose(sbResponseBody);
        return;
    }

    // If the 200 response was received, then the contacts XML is contained
    // in the response body.
    xml = CkXml_Create();
    CkXml_LoadSb(xml,sbResponseBody,FALSE);

    printf("%s\n",CkXml_getXml(xml));
    printf("-------------------\n");

    // Get the etag:
    lastKnownEtag = CkXml_getAttrValue(xml,"gd:etag");
    printf("lastKnownEtag = %s\n",lastKnownEtag);
    printf("-------------------\n");

    // To delete, send the following:

    // 	DELETE /m8/feeds/contacts/default/full/{contactId}
    // 	If-Match: {lastKnownEtag}
    // 	GData-Version: 3.0

    CkRest_ClearAllHeaders(rest);
    CkRest_AddHeader(rest,"If-Match",lastKnownEtag);
    CkRest_AddHeader(rest,"GData-Version","3.0");

    // The sbPath already contains the correct path..
    success = CkRest_FullRequestNoBodySb(rest,"DELETE",CkStringBuilder_getAsString(sbPath),sbResponseBody);
    if (success != TRUE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkJsonObject_Dispose(jsonToken);
        CkAuthGoogle_Dispose(gAuth);
        CkRest_Dispose(rest);
        CkStringBuilder_Dispose(sbPath);
        CkStringBuilder_Dispose(sbResponseBody);
        CkXml_Dispose(xml);
        return;
    }

    // A successful response will have a status code equal to 200.
    if (CkRest_getResponseStatusCode(rest) != 200) {
        printf("response status code = %d\n",CkRest_getResponseStatusCode(rest));
        printf("response status text = %s\n",CkRest_responseStatusText(rest));
        printf("response header: %s\n",CkRest_responseHeader(rest));
        printf("response body: %s\n",CkStringBuilder_getAsString(sbResponseBody));
        printf("request header: %s\n",CkRest_lastRequestHeader(rest));
        CkJsonObject_Dispose(jsonToken);
        CkAuthGoogle_Dispose(gAuth);
        CkRest_Dispose(rest);
        CkStringBuilder_Dispose(sbPath);
        CkStringBuilder_Dispose(sbResponseBody);
        CkXml_Dispose(xml);
        return;
    }

    // The response body for a successful DELETE is empty.
    printf("Response Body: (should be empty)\n");
    printf("%s\n",CkStringBuilder_getAsString(sbResponseBody));
    printf("Success.\n");


    CkJsonObject_Dispose(jsonToken);
    CkAuthGoogle_Dispose(gAuth);
    CkRest_Dispose(rest);
    CkStringBuilder_Dispose(sbPath);
    CkStringBuilder_Dispose(sbResponseBody);
    CkXml_Dispose(xml);

    }