/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2001-2002 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 org.apache.tools.ant.Task;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;

import java.io.File;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.PrintWriter;
import java.io.FileWriter;
import java.io.IOException;

/**
 * CVSLogin
 *
 * Adds an new entry to a CVS password file
 *
 * @author <a href="jeff@custommonkey.org">Jeff Martin</a>
 * @version $Revision$
 *
 * @ant.task category="scm"
 */
public class CVSPass extends Task {
    /** CVS Root */
    private String cvsRoot = null; 
    /** Password file to add password to */
    private File passFile = null;
    /** Password to add to file */
    private String password = null;
    /** End of line character */
    private final String EOL = System.getProperty("line.separator");

    /** Array contain char conversion data */
   private final char[] shifts = {
    0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
   16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
  114,120, 53, 79, 96,109, 72,108, 70, 64, 76, 67,116, 74, 68, 87,
  111, 52, 75,119, 49, 34, 82, 81, 95, 65,112, 86,118,110,122,105,
   41, 57, 83, 43, 46,102, 40, 89, 38,103, 45, 50, 42,123, 91, 35,
  125, 55, 54, 66,124,126, 59, 47, 92, 71,115, 78, 88,107,106, 56,
   36,121,117,104,101,100, 69, 73, 99, 63, 94, 93, 39, 37, 61, 48,
   58,113, 32, 90, 44, 98, 60, 51, 33, 97, 62, 77, 84, 80, 85,223,
  225,216,187,166,229,189,222,188,141,249,148,200,184,136,248,190,
  199,170,181,204,138,232,218,183,255,234,220,247,213,203,226,193,
  174,172,228,252,217,201,131,230,197,211,145,238,161,179,160,212,
  207,221,254,173,202,146,224,151,140,196,205,130,135,133,143,246,
  192,159,244,239,185,168,215,144,139,165,180,157,147,186,214,176,
  227,231,219,169,175,156,206,198,129,164,150,210,154,177,134,127,
  182,128,158,208,162,132,167,209,149,241,153,251,237,236,171,195,
  243,233,253,240,194,250,191,155,142,137,245,235,163,242,178,152 };

    public CVSPass(){
        passFile = new File(System.getProperty("user.home")+"/.cvspass");
    }

    /**
     * Does the work.
     *
     * @exception BuildException if someting goes wrong with the build
     */
    public final void execute() throws BuildException {
        if(cvsRoot==null) {
         throw new BuildException("cvsroot is required");
        }
        if(password==null) {
         throw new BuildException("password is required");
        }

        log("cvsRoot: " + cvsRoot, Project.MSG_DEBUG);
        log("password: " + password, Project.MSG_DEBUG);
        log("passFile: " + passFile, Project.MSG_DEBUG);

        try{
            StringBuffer buf = new StringBuffer();

            if(passFile.exists()){
                BufferedReader reader =
                    new BufferedReader(new FileReader(passFile));

                String line = null;

                while((line=reader.readLine())!=null){
                    if(!line.startsWith(cvsRoot)){
                        buf.append(line+EOL);
                    }
                }

            reader.close();
            }

            String pwdfile = buf.toString() + cvsRoot + " A" + mangle(password);

            log("Writing -> " + pwdfile , Project.MSG_DEBUG);

            PrintWriter writer = new PrintWriter(new FileWriter(passFile));

            writer.println( pwdfile );

            writer.close();
        }catch(IOException e){
            throw new BuildException(e);
        }

    }

    private final String mangle(String password){
        StringBuffer buf = new StringBuffer();
        for(int i=0;i<password.length();i++) {
            buf.append(shifts[password.charAt(i)]);
        }
        return buf.toString();
    }

    /**
     * Sets cvs root to be added to the password file
     */
    public void setCvsroot(String cvsRoot) {
        this.cvsRoot = cvsRoot;
    }

    /**
     * Sets the password file attribute.
     */
    public void setPassfile(File passFile) {
        this.passFile = passFile;
    }

    /**
     * Sets the password attribute.
     */
    public void setPassword(String password) {
        this.password = password;
    }

}
