(C) Yahoo Mail Send using OAuth2 Access Token

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#include <C_CkJsonObject.h>
#include <C_CkMailMan.h>
#include <C_CkEmail.h>

void ChilkatSample(void)
    {
    HCkJsonObject json;
    BOOL success;
    const char *accessToken;
    HCkMailMan mailman;
    HCkEmail email;

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

    // See Get Yahoo Mail OAuth2 Access Token for Desktop App 
    // for sample code showing how to obtain a Yahoo Mail access token.

    // In this example, our access token was previously saved to the following file which contains JSON like this:
    // {
    //   "access_token": "kCVQdnOdul...LHucA--",
    //   "refresh_token": "AIenVXETSo0jklFBVkPS8vVm8E.Ej9ToRG.xDbDYmZ65WIs5t6CZhDrD",
    //   "expires_in": 3600,
    //   "token_type": "bearer",
    //   "xoauth_yahoo_guid": "HGDQCVF5JB4YDOWHITQJFBHCWA"
    // }

    json = CkJsonObject_Create();
    success = CkJsonObject_LoadFile(json,"qa_data/tokens/yahooMail.json");
    if (success != TRUE) {
        printf("Failed to load Yahoo access token file.\n");
        CkJsonObject_Dispose(json);
        return;
    }

    accessToken = CkJsonObject_stringOf(json,"access_token");

    mailman = CkMailMan_Create();

    // Set the properties for the Yahoo SMTP server:
    CkMailMan_putSmtpHost(mailman,"smtp.mail.yahoo.com");
    CkMailMan_putSmtpPort(mailman,465);
    CkMailMan_putSmtpSsl(mailman,TRUE);

    // The SMTP username should be the Yahoo email address of the user's account that authorized your app to send email.
    CkMailMan_putSmtpUsername(mailman,"user@yahoo.com");
    CkMailMan_putOAuth2AccessToken(mailman,accessToken);

    // Create a new email object
    email = CkEmail_Create();

    CkEmail_putSubject(email,"This is a test");
    CkEmail_putBody(email,"This is a test");
    CkEmail_putFrom(email,"Joe User <user@yahoo.com>");
    CkEmail_AddTo(email,"Chilkat Admin","admin@chilkatsoft.com");
    // To add more recipients, call AddTo, AddCC, or AddBcc once per recipient.

    // Call SendEmail to connect to the SMTP server and send.
    // The connection (i.e. session) to the SMTP server remains
    // open so that subsequent SendEmail calls may use the
    // same connection.  
    success = CkMailMan_SendEmail(mailman,email);
    if (success != TRUE) {
        printf("%s\n",CkMailMan_lastErrorText(mailman));
        CkJsonObject_Dispose(json);
        CkMailMan_Dispose(mailman);
        CkEmail_Dispose(email);
        return;
    }

    // You may close the connection here.  If the connection is kept open, 
    // the next call to mailman.SendEmail will continue using the already-established connection
    // (and automatically re-connect if needed).
    success = CkMailMan_CloseSmtpConnection(mailman);
    if (success != TRUE) {
        printf("Connection to SMTP server not closed cleanly.\n");
    }

    printf("Email Sent via Yahoo with OAuth2 authentication.\n");


    CkJsonObject_Dispose(json);
    CkMailMan_Dispose(mailman);
    CkEmail_Dispose(email);

    }