/*
 * 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.lenya.cms.module;

import java.io.File;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

import org.apache.avalon.framework.configuration.Configurable;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.ConfigurationException;
import org.apache.avalon.framework.logger.AbstractLogEnabled;
import org.apache.avalon.framework.thread.ThreadSafe;

/**
 * Module manager implementation.
 */
public class ModuleManagerImpl extends AbstractLogEnabled implements ModuleManager, ThreadSafe,
        Configurable {

    public String getBaseURI(String shortcut) throws ModuleException {
        if (!this.module2src.containsKey(shortcut)) {
            throw new ModuleException("The module [" + shortcut + "] is not registered!");
        }
        
        String baseUri;
        if (this.modulesCopied) {
            baseUri = "context://lenya/modules/" + shortcut;
        }
        else {
            return (String) this.module2src.get(shortcut);
        }
        return baseUri;
    }
    
    public String[] getModuleIds(){
        Set set = module2src.keySet();
        return (String[]) set.toArray(new String[set.size()]);
    }

    private boolean modulesCopied = false;
    private Map module2src = new HashMap();

    public void configure(Configuration config) throws ConfigurationException {
        Configuration modulesConfig = config.getChild("modules");
        this.modulesCopied = modulesConfig.getAttributeAsBoolean("copy");

        Configuration[] modules = modulesConfig.getChildren("module");
        for (int i = 0; i < modules.length; i++) {
            String shortcut = modules[i].getAttribute("shortcut");
            String src = modules[i].getAttribute("src");
            String uri = new File(src).toURI().toString();
            this.module2src.put(shortcut, uri);
        }

    }

}