(C) Find Contact Having Email Address

Demonstrates how to fetch the Google Contact for a given email address.

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

void ChilkatSample(void)
    {
    HCkJsonObject jsonToken;
    BOOL success;
    HCkAuthGoogle gAuth;
    HCkRest rest;
    BOOL bAutoReconnect;
    const char *emailAddressToFind;
    HCkStringBuilder sbResponseBody;
    HCkXml xml;
    int totalResults;
    int startIndex;
    int itemsPerPage;
    HCkFileAccess fac;
    int numEntries;
    int i;
    const char *idUrl;
    const char *contactId;
    const char *fullName;
    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 contacts, we need to send the following:

    // 	GET /m8/feeds/contacts/default/full?q=<emailAddress>
    // 	GData-Version: 3.0

    // Get the contact (or contacts) with this email address:
    emailAddressToFind = "admin@chilkatsoft.com";

    CkRest_AddHeader(rest,"GData-Version","3.0");
    CkRest_AddQueryParam(rest,"q",emailAddressToFind);

    sbResponseBody = CkStringBuilder_Create();
    success = CkRest_FullRequestNoBodySb(rest,"GET","/m8/feeds/contacts/default/full",sbResponseBody);
    if (success != TRUE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkJsonObject_Dispose(jsonToken);
        CkAuthGoogle_Dispose(gAuth);
        CkRest_Dispose(rest);
        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(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_contacts.xml");

    // Now let's parse the XML...

    // Get the the total number of results, the start index, and the items per page.
    // We'll likely NOT get the full list, but will instead get the 1st page.
    totalResults = CkXml_GetChildIntValue(xml,"openSearch:totalResults");
    startIndex = CkXml_GetChildIntValue(xml,"openSearch:startIndex");
    itemsPerPage = CkXml_GetChildIntValue(xml,"openSearch:itemsPerPage");
    printf("totalResults = %d\n",totalResults);
    printf("startIndex = %d\n",startIndex);
    printf("itemsPerPage = %d\n",itemsPerPage);

    // We'll borrow a method from FileAccess to get the contactId from the URL string (see the code in the while loop)
    fac = CkFileAccess_Create();

    // Iterate over each contact.
    numEntries = CkXml_NumChildrenHavingTag(xml,"entry");
    i = 0;
    while (i < numEntries) {
        CkXml_putI(xml,i);
        printf("%d ----\n",i + 1);
        printf("title: %s\n",CkXml_getChildContent(xml,"entry[i]|title"));

        // The entry "id" child contains a URL having this format:
        // <id>http://www.google.com/m8/feeds/contacts/{userEmail}/base/{contactId}</id>
        // Let's get the URL and parse the contactId from it..
        idUrl = CkXml_getChildContent(xml,"entry[i]|id");
        printf("id: %s\n",idUrl);

        // Use the parsing ability of GetFileName to get the contactId
        contactId = CkFileAccess_getFileName(fac,idUrl);
        printf("contactId: %s\n",contactId);

        fullName = CkXml_chilkatPath(xml,"entry[i]|gd:name|gd:fullName|*");
        if (CkXml_getLastMethodSuccess(xml) == TRUE) {
            printf("fullName: %s\n",fullName);
        }

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

        i = i + 1;
    }



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

    }