(C) Retrieve a Single Contact

Demonstrates how to retrieve a single contact (by contactId) for the Google Contacts API.

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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 *emailAddress;

    // 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 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 = "7b1c7b6409e718a0"
    numReplacements = CkStringBuilder_Replace(sbPath,"{contactId}","7b1c7b6409e718a0");

    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);

    // See below for a sample response body.
    CkXml_SaveXml(xml,"qa_output/google_contact.xml");

    // Now let's parse the XML...
    printf("title: %s\n",CkXml_getChildContent(xml,"title"));

    emailAddress = CkXml_chilkatPath(xml,"gd:email|(address)");
    if (CkXml_getLastMethodSuccess(xml) == TRUE) {
        printf("email address: %s\n",emailAddress);
    }

    // The response body XML looks something like this:

    // 	<?xml version="1.0" encoding="UTF-8" ?>
    // 	<entry gd:etag="&quot;R3kzezVSLit7I2A9XRFaFE8DQAU.&quot;" xmlns="http://www.w3.org/2005/Atom" xmlns:batch="http://schemas.google.com/gdata/batch" xmlns:gContact="http://schemas.google.com/contact/2008" xmlns:gd="http://schemas.google.com/g/2005">
    // 	    <id>http://www.google.com/m8/feeds/contacts/support%40chilkatcloud.com/base/7b1c7b6409e718a0</id>
    // 	    <updated>2016-11-18T00:41:56.783Z</updated>
    // 	    <app:edited xmlns:app="http://www.w3.org/2007/app">2016-11-18T00:41:56.783Z</app:edited>
    // 	    <category scheme="http://schemas.google.com/g/2005#kind" term="http://schemas.google.com/contact/2008#contact" />
    // 	    <title>Chilkat Cloud</title>
    // 	    <link rel="http://schemas.google.com/contacts/2008/rel#photo" type="image/*" href="https://www.googleapis.com/m8/feeds/photos/media/support%40chilkatcloud.com/7b1c7b6409e718a0" gd:etag="&quot;fgVhPls4Sit7I2BWHUlTWkQMKHUZKHkkaiw.&quot;" />
    // 	    <link rel="self" type="application/atom+xml" href="https://www.googleapis.com/m8/feeds/contacts/support%40chilkatcloud.com/full/7b1c7b6409e718a0" />
    // 	    <link rel="edit" type="application/atom+xml" href="https://www.googleapis.com/m8/feeds/contacts/support%40chilkatcloud.com/full/7b1c7b6409e718a0" />
    // 	    <gd:name>
    // 	        <gd:fullName>Chilkat Cloud</gd:fullName>
    // 	        <gd:givenName>Chilkat</gd:givenName>
    // 	        <gd:familyName>Cloud</gd:familyName>
    // 	    </gd:name>
    // 	    <gd:email rel="http://schemas.google.com/g/2005#other" address="support@chilkatcloud.com" primary="true" />
    // 	    <gContact:groupMembershipInfo deleted="false" href="http://www.google.com/m8/feeds/groups/support%40chilkatcloud.com/base/6" />
    // 	</entry>


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

    }