/**

 * Copyright (c) 2010 Symbian Foundation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Symbian Foundation - initial contribution.

 * Contributors:

 * Description:

 * Overview:

 * Details:

 * Platforms/Drives/Compatibility:

 * Assumptions/Requirement/Pre-requisites:

 * Failures and causes:

 */

package org.symbian.tools.tmw.previewer.internal;

import java.util.Collection;

import java.util.HashMap;

import java.util.HashSet;

import java.util.Map;

import org.eclipse.core.resources.IFile;

import org.eclipse.core.resources.IProject;

import org.eclipse.core.resources.IResource;

import org.eclipse.core.resources.IResourceDelta;

import org.eclipse.core.resources.IResourceDeltaVisitor;

import org.eclipse.core.runtime.CoreException;

import org.eclipse.core.runtime.IPath;

import org.symbian.tools.tmw.previewer.PreviewerPlugin;

public class PreviewerUtil {

    public static final class ChangedResourcesCollector implements IResourceDeltaVisitor {

        public final Collection<IFile> files = new HashSet<IFile>();

        public final Collection<IProject> deleted = new HashSet<IProject>();

        public final Map<IProject, IPath> renamed = new HashMap<IProject, IPath>();

        public boolean visit(IResourceDelta delta) throws CoreException {

            IResource resource = delta.getResource();

            switch (resource.getType()) {

            case IResource.PROJECT:

                if (delta.getKind() == IResourceDelta.REMOVED) {

                    if ((delta.getFlags() & IResourceDelta.MOVED_TO) != 0) {

                        renamed.put(resource.getProject(), delta.getMovedToPath());

                    } else {

                        deleted.add((IProject) resource);

                    }

                    return false;

                }

                break;

            case IResource.FILE:

                        }

                    }

                }

                break;

            }

            return true;

        }

    }

    public static boolean isRelevantResource(IResource resource) {

        if (resource.exists() && resource.getType() == IResource.FILE) {

            return !resource.getFullPath().segment(1).equalsIgnoreCase("preview")

                    && !"wgz".equalsIgnoreCase(resource.getFileExtension())

                    && !(PreviewerPlugin.PLUGIN_ID + ".xml").equals(resource.getName());

        }

        return false;

    }

    public static IFile[] getWebChanges(final IResourceDelta delta) {

        ChangedResourcesCollector visitor = collectResourceChanges(delta);

        final Collection<IFile> files = visitor.files;

        return files.toArray(new IFile[files.size()]);

    }

    public static ChangedResourcesCollector collectResourceChanges(final IResourceDelta delta) {

        ChangedResourcesCollector visitor = new ChangedResourcesCollector();

        try {

            delta.accept(visitor);

        } catch (CoreException e) {

            PreviewerPlugin.log(e);

        }

        return visitor;

    }

}