/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2002 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Ant", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Group.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */
package org.apache.tools.ant.taskdefs.email;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.util.Enumeration;
import org.apache.tools.ant.BuildException;
import org.apache.tools.mail.MailMessage;

/**
 * Class responsible for sending email through raw protocol methods.
 *
 * @author roxspring@yahoo.com Rob Oxspring
 * @since 1.5
 */
class PlainMailer
    extends Mailer
{
    /** Sends the email using the apache {@link org.apache.tools.mail.MailMessage MailMessage} class.
     */
    public void send()
    {
        try
        {
            MailMessage mailMessage = new MailMessage( host );
            mailMessage.setPort( port );

            mailMessage.from( from.toString() );

            Enumeration e;

            e = toList.elements();
            while( e.hasMoreElements() )
            {
                mailMessage.to( e.nextElement().toString() );
            }

            e = ccList.elements();
            while( e.hasMoreElements() )
            {
                mailMessage.cc( e.nextElement().toString() );
            }

            e = bccList.elements();
            while( e.hasMoreElements() )
            {
                mailMessage.bcc( e.nextElement().toString() );
            }

            if( subject != null )
            {
                mailMessage.setSubject( subject );
            }

            mailMessage.setHeader( "Content-Type", message.getMimeType() );

            PrintStream out = mailMessage.getPrintStream();

            message.print( out );

            e = files.elements();
            while( e.hasMoreElements() )
            {
                File file = (File)e.nextElement();
                attach( file, out );
            }

            mailMessage.sendAndClose();
        }
        catch( IOException ioe )
        {
            throw new BuildException( "IO error sending mail", ioe );
        }

    }

    /** Attaches a file to this email
     * @param file The file to attache
     * @param out The message stream to add to
     * @throws IOException if errors occur
     */
    protected void attach( File file, PrintStream out )
        throws IOException
    {
        if( !file.exists() || !file.canRead() )
        {
            throw new BuildException( "File \"" + file.getName()
                                      + "\" does not exist or is not readable." );
        }

        if( includeFileNames )
        {
            out.println();
            String filename = file.getName();
            int filenamelength = filename.length();
            out.println( filename );
            for( int star = 0; star < filenamelength; star++ )
            {
                out.print( '=' );
            }
            out.println();
        }

        int length;
        byte[] buf = new byte[ 1024 ];
        FileInputStream finstr = new FileInputStream( file );
        try
        {
            BufferedInputStream in = new BufferedInputStream( finstr, buf.length );
            while( ( length = in.read( buf ) ) != -1 )
            {
                out.write( buf, 0, length );
            }
        }
        finally
        {
            finstr.close();
        }
    }
}