Setup.java

package com.rectang.xsm.pages.admin.xsm;

import com.rectang.xsm.AccessControl;
import com.rectang.xsm.XSM;
import com.rectang.xsm.pages.Secure;
import com.rectang.xsm.pages.XSMPage;
import org.apache.wicket.PageParameters;
import org.apache.wicket.ResourceReference;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.markup.html.image.Image;
import org.apache.wicket.markup.html.list.ListItem;
import org.apache.wicket.markup.html.list.ListView;

import java.util.*;

/**
 * A setup wizard that checks all system configurations
 *
 * @author Andrew Williams
 * @version $Id: Setup.java 833 2011-09-26 22:00:00Z andy $
 * @since 2.0
 */
public class Setup
        extends XSMPage
        implements Secure
{

    static List setupTasks = new ArrayList();

    static
    {
        setupTasks.add( new SetupTask( "Check /etc/xsm exists" )
        {
            public Boolean run()
            {
                return new Boolean( new java.io.File( "/etc/xsm" ).exists() );
            }
        } );
        setupTasks.add( new SetupTask( "Check /etc/xsm is writable" )
        {
            public Boolean run()
            {
                return new Boolean( new java.io.File( "/etc/xsm" ).canWrite() );
            }
        } );

    }

    public Setup( PageParameters parameters )
    {
        super( parameters );
    }

    static abstract class SetupTask
    {
        private String description;

        protected SetupTask( String description )
        {
            this.description = description;
        }

        public abstract Boolean run();

        public String getDescription()
        {
            return description;
        }
    }

    public int getLevel()
    {
        return AccessControl.ADMIN;
    }

    public void layout()
    {
        super.layout();

        final List results = runSetup();

        add( new ListView( "status-output", results )
        {
            protected void populateItem( ListItem listItem )
            {
                Boolean ok = (Boolean) listItem.getModelObject();
                SetupTask task = (SetupTask) setupTasks.get( listItem.getIndex() );

                if ( ok.equals( Boolean.TRUE ) )
                {
                    listItem.add( new Image( "icon", new ResourceReference( XSM.class, "icons/emblem-default.png" ) ) );
                }
                else
                {
                    listItem.add( new Image( "icon", new ResourceReference( XSM.class, "icons/emblem-important.png" ) ) );
                }

                listItem.add( new Label( "description", task.getDescription() ) );
            }

        } );

        Boolean passed = (Boolean) results.get( results.size() - 1 );
        if ( passed.equals( Boolean.TRUE ) )
        {
            add( new Image( "icon", new ResourceReference( XSM.class, "icons/emblem-default.png" ) ) );
            add( new Label( "summary", "OK - everything is fine!" ) );
        }
        else
        {
            add( new Image( "icon", new ResourceReference( XSM.class, "icons/emblem-important.png" ) ) );
            add( new Label( "summary", "Oh no, there seems to be a problem - please ensure you have extracted the supplied " +
                    "xsm-demo-config.zip file to /etc/xsm and that it is writable by this server process" ) );
        }
    }

    protected List runSetup()
    {
        List ret = new ArrayList();

        for ( int i = 0; i < setupTasks.size(); i++ )
        {
            Boolean result = ((SetupTask) setupTasks.get( i )).run();
            ret.add( result );

            if ( result.equals( Boolean.FALSE ) )
            {
                break;
            }
        }


        return ret;
    }
}