com.liferay.document.library.demo.data.creator.internal.UnsplashFileEntryDemoDataCreatorImpl.java Source code

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Here is the source code for com.liferay.document.library.demo.data.creator.internal.UnsplashFileEntryDemoDataCreatorImpl.java

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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

package com.liferay.document.library.demo.data.creator.internal;

import com.liferay.document.library.demo.data.creator.FileEntryDemoDataCreator;
import com.liferay.document.library.kernel.exception.NoSuchFileEntryException;
import com.liferay.document.library.kernel.service.DLAppLocalService;
import com.liferay.portal.kernel.exception.PortalException;
import com.liferay.portal.kernel.log.Log;
import com.liferay.portal.kernel.log.LogFactoryUtil;
import com.liferay.portal.kernel.repository.model.FileEntry;
import com.liferay.portal.kernel.repository.model.Folder;
import com.liferay.portal.kernel.security.RandomUtil;
import com.liferay.portal.kernel.service.ServiceContext;
import com.liferay.portal.kernel.util.FileUtil;

import java.io.IOException;
import java.io.InputStream;

import java.net.MalformedURLException;
import java.net.URL;

import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
import java.util.concurrent.CopyOnWriteArrayList;

import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Reference;

/**
 * @author Alejandro Hernndez
 */
@Component(property = { "source=unsplash", "type=image" }, service = FileEntryDemoDataCreator.class)
public class UnsplashFileEntryDemoDataCreatorImpl implements FileEntryDemoDataCreator {

    @Override
    public FileEntry create(long userId, long folderId) throws IOException, PortalException {

        UUID uuid = UUID.randomUUID();

        String sourceFileName = uuid.toString() + ".jpeg";

        return create(userId, folderId, sourceFileName);
    }

    @Override
    public FileEntry create(long userId, long folderId, String name) throws IOException, PortalException {

        Folder folder = _dlAppLocalService.getFolder(folderId);

        FileEntry fileEntry = _dlAppLocalService.addFileEntry(userId, folder.getGroupId(), folderId, name,
                "image/jpeg", _getBytes(), new ServiceContext());

        _fileEntryIds.add(fileEntry.getFileEntryId());

        return fileEntry;
    }

    @Override
    public void delete() throws PortalException {
        try {
            for (long fileEntryId : _fileEntryIds) {
                _fileEntryIds.remove(fileEntryId);

                _dlAppLocalService.deleteFileEntry(fileEntryId);
            }
        } catch (NoSuchFileEntryException nsfee) {
            if (_log.isWarnEnabled()) {
                _log.warn(nsfee, nsfee);
            }
        }
    }

    @Reference(unbind = "-")
    protected void setDlAppLocalService(DLAppLocalService dlAppLocalService) {
        _dlAppLocalService = dlAppLocalService;
    }

    private byte[] _getBytes() throws IOException, PortalException {
        URL url = _getNextUrl();

        InputStream inputStream = null;

        try {
            inputStream = url.openStream();

            return FileUtil.getBytes(inputStream);
        } catch (IOException ioe) {
            if (_log.isWarnEnabled()) {
                _log.warn(ioe, ioe);
            }

            String fileName = String.format("dependencies/%d.jpg", RandomUtil.nextInt(5));

            try {
                return FileUtil.getBytes(getClass(), fileName);
            } catch (Exception e) {
                throw new PortalException(e);
            }
        } finally {
            if (inputStream != null) {
                inputStream.close();
            }
        }
    }

    private URL _getNextUrl() throws MalformedURLException {
        _categoryIndex++;

        if (_categoryIndex == _categories.size()) {
            _categoryIndex = 0;
        }

        String urlString = String.format("https://source.unsplash.com/category/%s/1920x1080",
                _categories.get(_categoryIndex));

        return new URL(urlString);
    }

    private static final Log _log = LogFactoryUtil.getLog(UnsplashFileEntryDemoDataCreatorImpl.class);

    private static final List<String> _categories = new ArrayList<>();

    static {
        _categories.add("buildings");
        _categories.add("food");
        _categories.add("nature");
        _categories.add("people");
        _categories.add("technology");
        _categories.add("objects");
    }

    private int _categoryIndex = -1;
    private DLAppLocalService _dlAppLocalService;
    private final List<Long> _fileEntryIds = new CopyOnWriteArrayList<>();

}