KBArticleAttachmentKBUploadFileEntryHandler.java

/**
 * 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.knowledge.base.web.internal.upload;

import com.liferay.knowledge.base.constants.KBActionKeys;
import com.liferay.knowledge.base.model.KBArticle;
import com.liferay.knowledge.base.service.KBArticleLocalService;
import com.liferay.knowledge.base.service.permission.KBArticlePermission;
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.portletfilerepository.PortletFileRepositoryUtil;
import com.liferay.portal.kernel.repository.model.FileEntry;
import com.liferay.portal.kernel.theme.ThemeDisplay;
import com.liferay.portal.kernel.upload.UploadPortletRequest;
import com.liferay.portal.kernel.util.ParamUtil;
import com.liferay.portal.kernel.util.WebKeys;
import com.liferay.portal.kernel.workflow.WorkflowConstants;
import com.liferay.upload.UniqueFileNameProvider;
import com.liferay.upload.UploadFileEntryHandler;

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

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

/**
 * @author Roberto Díaz
 */
@Component(service = KBArticleAttachmentKBUploadFileEntryHandler.class)
public class KBArticleAttachmentKBUploadFileEntryHandler
	implements UploadFileEntryHandler {

	@Override
	public FileEntry upload(UploadPortletRequest uploadPortletRequest)
		throws IOException, PortalException {

		ThemeDisplay themeDisplay =
			(ThemeDisplay)uploadPortletRequest.getAttribute(
				WebKeys.THEME_DISPLAY);

		long resourcePrimKey = ParamUtil.getLong(
			uploadPortletRequest, "resourcePrimKey");

		KBArticle kbArticle = _kbArticleLocalService.getLatestKBArticle(
			resourcePrimKey, WorkflowConstants.STATUS_APPROVED);

		KBArticlePermission.check(
			themeDisplay.getPermissionChecker(), kbArticle,
			KBActionKeys.UPDATE);

		String fileName = uploadPortletRequest.getFileName(_PARAMETER_NAME);
		String contentType = uploadPortletRequest.getContentType(
			_PARAMETER_NAME);

		try (InputStream inputStream =
				uploadPortletRequest.getFileAsStream(_PARAMETER_NAME)) {

			String uniqueFileName = _uniqueFileNameProvider.provide(
				fileName,
				curFileName -> _exists(themeDisplay, kbArticle, curFileName));

			return _kbArticleLocalService.addAttachment(
				themeDisplay.getUserId(), resourcePrimKey, uniqueFileName,
				inputStream, contentType);
		}
	}

	private boolean _exists(
		ThemeDisplay themeDisplay, KBArticle kbArticle, String fileName) {

		try {
			if (PortletFileRepositoryUtil.getPortletFileEntry(
					themeDisplay.getScopeGroupId(),
					kbArticle.getAttachmentsFolderId(), fileName) != null) {

				return true;
			}

			return false;
		}
		catch (PortalException pe) {

			// LPS-52675

			if (_log.isDebugEnabled()) {
				_log.debug(pe, pe);
			}

			return false;
		}
	}

	private static final String _PARAMETER_NAME = "imageSelectorFileName";

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

	@Reference
	private KBArticleLocalService _kbArticleLocalService;

	@Reference
	private UniqueFileNameProvider _uniqueFileNameProvider;

}