/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2000-2002 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;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.Task;
import org.apache.tools.ant.types.EnumeratedAttribute;
/**
 * Writes a message to the Ant logging facilities.
 *
 * @author costin@dnt.ro
 *
 * @since Ant 1.1
 *
 * @ant.task category="utility"
 */
public class Echo extends Task {
    protected String message = ""; // required
    protected File file = null;
    protected boolean append = false;
    
    // by default, messages are always displayed
    protected int logLevel = Project.MSG_WARN;   
    
    /**
     * Does the work.
     *
     * @exception BuildException if someting goes wrong with the build
     */
    public void execute() throws BuildException {
        if (file == null) {
            log(message, logLevel);
        } else {
            FileWriter out = null;
            try {
                out = new FileWriter(file.getAbsolutePath(), append);
                out.write(message, 0, message.length());
            } catch (IOException ioe) {
                throw new BuildException(ioe, getLocation());
            } finally {
                if (out != null) {
                    try {
                        out.close();
                    } catch (IOException ioex) {}
                }
            }
        }
    }

    /**
     * Message to write.
     *
     * @param msg Sets the value for the message variable.
     */
    public void setMessage(String msg) {
        this.message = msg;
    }

    /**
     * File to write to.
     */
    public void setFile(File file) {
        this.file = file;
    }

    /**
     * If true, append to existing file.
     */
    public void setAppend(boolean append) {
        this.append = append;
    }

    /**
     * Set a multiline message.
     */
    public void addText(String msg) {
        message += getProject().replaceProperties(msg);
    }

    /**
     * Set the logging level. Level should be one of
     * <ul>
     *  <li>error</li>
     *  <li>warning</li>
     *  <li>info</li>
     *  <li>verbose</li>
     *  <li>debug</li>
     * </ul>
     * <p>The default is &quot;warning&quot; to ensure that messages are
     * displayed by default when using the -quiet command line option.</p>
     */
    public void setLevel(EchoLevel echoLevel) {
        String option = echoLevel.getValue();
        if (option.equals("error")) {
            logLevel = Project.MSG_ERR;
        } else if (option.equals("warning")) {
            logLevel = Project.MSG_WARN;
        } else if (option.equals("info")) {
            logLevel = Project.MSG_INFO;
        } else if (option.equals("verbose")) {
            logLevel = Project.MSG_VERBOSE;
        } else {
            // must be "debug"
            logLevel = Project.MSG_DEBUG;
        }
    }

    public static class EchoLevel extends EnumeratedAttribute {
        /**
         * @see EnumeratedAttribute#getValues
         */
        public String[] getValues() {
            return new String[] {"error", "warning", "info", 
                                 "verbose", "debug"};
        }
    }
}