(C++) Update a Google Contact

Demonstrates how to update a Google Contact.

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#include <CkJsonObject.h>
#include <CkAuthGoogle.h>
#include <CkRest.h>
#include <CkStringBuilder.h>
#include <CkXml.h>

void ChilkatSample(void)
    {
    // 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

    CkJsonObject jsonToken;
    bool success = jsonToken.LoadFile("qa_data/tokens/googleContacts.json");
    if (success != true) {
        std::cout << "Failed to load googleContacts.json" << "\r\n";
        return;
    }

    CkAuthGoogle gAuth;
    gAuth.put_AccessToken(jsonToken.stringOf("access_token"));

    CkRest rest;

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

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

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

    // To update a contact, we'll first get the contact information,
    // then we'll make changes to the XML and then PUT the update.

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

    rest.AddHeader("GData-Version","3.0");

    CkStringBuilder sbPath;
    sbPath.Append("/m8/feeds/contacts/default/full/{contactId}");
    // Get the contact having contactId = "5b6d64980b1ed462"
    int numReplacements = sbPath.Replace("{contactId}","5b6d64980b1ed462");

    CkStringBuilder sbResponseBody;
    success = rest.FullRequestNoBodySb("GET",sbPath.getAsString(),sbResponseBody);
    if (success != true) {
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

    // A successful response will have a status code equal to 200.
    if (rest.get_ResponseStatusCode() != 200) {
        std::cout << "response status code = " << rest.get_ResponseStatusCode() << "\r\n";
        std::cout << "response status text = " << rest.responseStatusText() << "\r\n";
        std::cout << "response header: " << rest.responseHeader() << "\r\n";
        std::cout << "response body: " << sbResponseBody.getAsString() << "\r\n";
        return;
    }

    // If the 200 response was received, then the contacts XML is contained
    // in the response body.
    CkXml xml;
    xml.LoadSb(sbResponseBody,false);

    // Get the etag:
    const char *lastKnownEtag = xml.getAttrValue("gd:etag");
    std::cout << "lastKnownEtag = " << lastKnownEtag << "\r\n";

    // Update the XML.
    // We're going to add or update with the following information:

    // 	  <gd:name>
    // 	    <gd:givenName>Joe</gd:givenName>
    // 	    <gd:familyName>Sample</gd:familyName>
    // 	    <gd:fullName>Joe Sample</gd:fullName>
    // 	  </gd:name>
    // 	  <content type="text">RIP Joe Sample, a great musician...</content>
    // 	  <gd:extendedProperty name="pet" value="hamster"/>

    xml.UpdateChildContent("gd:name|gd:givenName","Joe");
    xml.UpdateChildContent("gd:name|gd:familyName","Sample");
    xml.UpdateChildContent("gd:name|gd:fullName","Joe Sample");
    xml.UpdateChildContent("content","RIP Joe Sample, a great musician...");
    xml.UpdateAttrAt("content",true,"type","text");
    xml.UpdateAttrAt("gd:extendedProperty",true,"name","pet");
    xml.UpdateAttrAt("gd:extendedProperty",true,"value","hamster");

    // Send the following:

    // 	PUT /m8/feeds/contacts/default/full/{contactId}
    // 	If-Match: {lastKnownEtag}
    // 	GData-Version: 3.0
    // 	Content-Type: application/atom+xml

    rest.ClearAllHeaders();
    rest.AddHeader("If-Match",lastKnownEtag);
    rest.AddHeader("GData-Version","3.0");
    rest.AddHeader("Content-Type","application/atom+xml");

    CkStringBuilder sbRequestBody;
    xml.GetXmlSb(sbRequestBody);

    // The sbPath already contains the correct path..
    success = rest.FullRequestSb("PUT",sbPath.getAsString(),sbRequestBody,sbResponseBody);
    if (success != true) {
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

    // A successful response will have a status code equal to 200.
    if (rest.get_ResponseStatusCode() != 200) {
        std::cout << "response status code = " << rest.get_ResponseStatusCode() << "\r\n";
        std::cout << "response status text = " << rest.responseStatusText() << "\r\n";
        std::cout << "response header: " << rest.responseHeader() << "\r\n";
        std::cout << "response body: " << sbResponseBody.getAsString() << "\r\n";
        return;
    }

    // If the 200 response was received, then the updated contact XML is contained
    // in the response body.
    xml.LoadSb(sbResponseBody,false);

    std::cout << "Response Body:" << "\r\n";
    std::cout << xml.getXml() << "\r\n";
    std::cout << "Success." << "\r\n";
    }