package org.apache.maven.release;

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 *
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 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
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 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
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 *    distribution.
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 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
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 *    if and wherever such third-party acknowledgments normally appear.
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 * information on the Apache Software Foundation, please see
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import org.apache.commons.io.FileUtils;
import org.apache.maven.MavenConstants;
import org.apache.maven.util.HttpUtils;
import org.dom4j.Node;

import java.io.File;

/**
 *
 *
 * @author <a href="mailto:jason@zenplex.com">Jason van Zyl</a>
 *
 * @version $Id: SnapshotResolver.java,v 1.12 2003/04/13 00:56:02 dion Exp $
 */
public class SnapshotResolver
    extends AbstractPomTransformer
{
    // -------------------------------------------------------------------------
    // Accessors
    // -------------------------------------------------------------------------

    public String selectNodesXPathExpression()
    {
        return "/project/dependencies/dependency[version='SNAPSHOT']";
    }

    public String selectNodeXPath()
    {
        return "version";
    }

    public String getNodeContent( Node node )
        throws Exception
    {
        String timestampVersion = null;

        Node idNode = node.selectSingleNode( "id" );

        String groupId;
        String artifactId;

        if ( idNode != null )
        {
            groupId = idNode.getText();
            artifactId = groupId;
        }
        else
        {
            Node artifactIdNode = node.selectSingleNode( "artifactId" );
            Node groupIdNode = node.selectSingleNode( "groupId" );

            groupId = groupIdNode.getText();
            artifactId = artifactIdNode.getText();
        }

        // Now we need to attempt to find the the actual timestamp
        // version for this dependency.

        // Variables are being stored as ConstantExpressions ...

        /*
        String url = getVariables().get( MavenConstants.REPO_REMOTE ) + "/" +
            groupId + "/jars/" + artifactId + "-snapshot-version";
        */

        String url = "http://www.ibiblio.org/maven/" + groupId + "/jars/" + artifactId + "-snapshot-version";

        File snapshotVersionFile = new File( getProject().getParentFile(), artifactId + "-snapshot-version" );

        try
        {
            HttpUtils.getFile( url,
                               snapshotVersionFile,
                               true, // ignore errors
                               false, // use timestamps
                               (String) getVariables().get( MavenConstants.PROXY_HOST ), // proxy host
                               (String) getVariables().get( MavenConstants.PROXY_PORT ), // proxy port
                               (String) getVariables().get( MavenConstants.PROXY_USERNAME ), // proxy user name
                               (String) getVariables().get( MavenConstants.PROXY_PASSWORD ) // proxy password
            );
        }
        catch ( Exception e )
        {
            // Either doesn't exist, or we have a network problem. In
            // either event we can't update the version field.
            System.out.println( "Can't retrieve snapshot version file: " + e.getLocalizedMessage() );
        }

        if ( snapshotVersionFile.exists() )
        {
            timestampVersion = FileUtils.fileRead( snapshotVersionFile.getPath() );
        }
        else
        {
            timestampVersion = "SNAPSHOT";
        }

        return timestampVersion;
    }

    public void transformNode( Node node )
        throws Exception
    {
        Node version = node.selectSingleNode( selectNodeXPath() );
        version.setText( getNodeContent( node ) );
    }

    public Node getTransformedNode( Node node )
        throws Exception
    {
        Node transformedNode = (Node) node.clone();
        Node version = transformedNode.selectSingleNode( selectNodeXPath() );
        version.setText( getNodeContent( transformedNode ) );

        return transformedNode;
    }
}
