/*
 * Copyright (c) 2006-2011 Chris Smith, Shane Mc Cormack, Gregory Holmes
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package com.dmdirc.util.resourcemanager;

import com.dmdirc.util.StreamUtil;

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

/**
 * Provides an easy way to access files inside a zip or jar.
 */
public final class ZipResourceManager extends ResourceManager {

    /** Zipfile instance. */
    private final ZipFile zipFile;

    /** Entries list. */
    private final List<String> entries;

    /**
     * Instantiates ZipResourceManager.
     *
     * @param filename Filename of the zip to load
     * @throws IOException Throw when the zip fails to load
     */
    protected ZipResourceManager(final String filename) throws IOException {
        super();

        this.zipFile = new ZipFile(filename);
        entries = new ArrayList<String>();
        final Enumeration<? extends ZipEntry> zipEntries = zipFile.entries();
        while (zipEntries.hasMoreElements()) {
            entries.add(zipEntries.nextElement().getName());
        }
    }

    /**
     * Returns an instance of a ZipResourceManager for the specified file.
     *
     * @param filename Filename of the zip to load
     *
     * @return ZipResourceManager instance
     *
     * @throws IOException Throw when the zip fails to load
     */
    public static synchronized ZipResourceManager getInstance(final String filename) throws
            IOException {
        return new ZipResourceManager(filename);
    }

    /** {@inheritDoc} */
    @Override
    public boolean resourceExists(final String resource) {
        final ZipEntry zipEntry = zipFile.getEntry(resource);

        return zipEntry != null && !zipEntry.isDirectory();
    }

    /** {@inheritDoc} */
    @Override
    public byte[] getResourceBytes(final String resource) {
        final ZipEntry zipEntry = zipFile.getEntry(resource);
        BufferedInputStream inputStream = null;


        if (zipEntry == null) {
            return new byte[0];
        }

        if (zipEntry.isDirectory()) {
            return new byte[0];
        }

        final byte[] bytes = new byte[(int) zipEntry.getSize()];

        try {
            inputStream = new BufferedInputStream(zipFile.getInputStream(zipEntry));

            if (inputStream.read(bytes) != bytes.length) {
                inputStream.close();
                return new byte[0];
            }
        } catch (IOException ex) {
            return new byte[0];
        } finally {
            StreamUtil.close(inputStream);
        }

        return bytes;
    }

    /** {@inheritDoc} */
    @Override
    public InputStream getResourceInputStream(final String resource) {
        final ZipEntry zipEntry = zipFile.getEntry(resource);
        if (zipEntry == null) {
            return null;
        }

        try {
            return zipFile.getInputStream(zipEntry);
        } catch (IOException ex) {
            return null;
        }

    }

    /** {@inheritDoc} */
    @Override
    public URL getResourceURL(final String resource) throws MalformedURLException {
        if (resourceExists(resource)) {
            return new URL("jar:" + zipFile.getName() + "!" + resource);
        } else {
            return null;
        }
    }

    /** {@inheritDoc} */
    @Override
    public Map<String, byte[]> getResourcesEndingWithAsBytes(
            final String resourcesSuffix) {
        final Map<String, byte[]> resources = new HashMap<String, byte[]>();

        for (String entry : entries) {
            if (entry.endsWith(resourcesSuffix)) {
                resources.put(entry, getResourceBytes(entry));
            }
        }

        return resources;
    }

    /** {@inheritDoc} */
    @Override
    public Map<String, byte[]> getResourcesStartingWithAsBytes(
            final String resourcesPrefix) {
        final Map<String, byte[]> resources = new HashMap<String, byte[]>();

        for (String entry : entries) {
            if (entry.startsWith(resourcesPrefix)) {
                resources.put(entry, getResourceBytes(entry));
            }
        }

        return resources;
    }

    /** {@inheritDoc} */
    @Override
    public Map<String, InputStream> getResourcesStartingWithAsInputStreams(
            final String resourcesPrefix) {
        final Map<String, InputStream> resources =
                new HashMap<String, InputStream>();

        for (String entry : entries) {
            if (entry.startsWith(resourcesPrefix)) {
                resources.put(entry, getResourceInputStream(entry));
            }
        }

        return resources;
    }

    /** {@inheritDoc} */
    @Override
    public List<String> getResourcesStartingWith(final String resourcesPrefix) {
        final List<String> resources = new ArrayList<String>();

        for (String entry : entries) {
            if (entry.startsWith(resourcesPrefix)) {
                resources.add(entry);
            }
        }

        return resources;
    }
}


@@ -2996,17 +2996,16 @@
 ource);%0A
-%0A
         
@@ -4492,16 +4492,22 @@
 RL(%22jar:
+file:/
 %22 + zipF
@@ -4529,19 +4529,40 @@
  %22!%22
+%0A                   
  + 
+(
 resource
 );%0A 
@@ -4549,32 +4549,78 @@
      + (resource
+.charAt(0) == '/' ? resource : %22/%22 + resource)
 );%0A        %7D els

Fix obscure bug with zip resource manager outputting invalid URLs