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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.    
 */

package org.apache.tuscany.sca.diagram.shell;

import jline.Completor;
import jline.NullCompletor;

import org.apache.tuscany.sca.assembly.Composite;
import org.apache.tuscany.sca.impl.diagram.DiagramGenerator;
import org.apache.tuscany.sca.impl.layout.CompositeEntity;
import org.apache.tuscany.sca.impl.layout.TuscanyCompositeEntityBuilder;
import org.apache.tuscany.sca.shell.Command;
import org.apache.tuscany.sca.shell.Shell;
import org.apache.tuscany.sca.shell.jline.CompositeURICompletor;
import org.apache.tuscany.sca.shell.jline.ICURICompletor;
import org.w3c.dom.Document;

public class DrawShellCommand implements Command {

    private Shell shell;
    
    public DrawShellCommand(Shell shell) {
        this.shell = shell;
    }

    public String getName() {
        return "draw";
    }

    public String getShortHelp() {
        return "draw [DOMAIN | <contributionURI> <compositeURI>]";
    }

    public String getHelp() {
        StringBuilder helpText = new StringBuilder();
        helpText.append("Draws a picture of the composite.\n");
        helpText.append("\n");
        helpText.append("Arguments:\n");
        helpText.append("   DOMAIN          - When the only argument is DOMAIN display the domain composite, otherwise:\n");
        helpText.append("   contributionURI - (required) the URI of the installed contribution\n");
        helpText.append("   compositeURL    - (required) the URI of a started composite\n");
        return helpText.toString();
    }

    public boolean invoke(String[] args) throws Exception {

        Composite composite;
        if ("DOMAIN".equals(args[0])) {
            composite = shell.getNode().getDomainComposite();
        } else {
            composite = shell.getNode().getContribution(args[0]).getArtifactModel(args[1]);
        }
        TuscanyCompositeEntityBuilder eb = new TuscanyCompositeEntityBuilder(composite);
        CompositeEntity comp = eb.buildCompositeEntity();
        DiagramGenerator dg = new DiagramGenerator(comp);
        Document svg = dg.buildSVGDocument();

        new SVGViewer(svg);

        return true;
    }

    public Completor[] getCompletors() {
        return new Completor[]{new ICURICompletor(shell), new CompositeURICompletor(shell), new NullCompletor()};
    }

}