org.wte4j.ui.server.services.TemplateRestService.java Source code

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Here is the source code for org.wte4j.ui.server.services.TemplateRestService.java

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/**
 * Copyright (C) 2015 Born Informatik AG (www.born.ch)
 *
 * Licensed 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.wte4j.ui.server.services;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import javax.servlet.http.HttpServletResponse;

import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import org.wte4j.InvalidTemplateException;
import org.wte4j.LockingException;
import org.wte4j.Template;
import org.wte4j.TemplateRepository;
import org.wte4j.WteException;
import org.wte4j.ui.shared.FileUploadResponseDto;

@RestController
@RequestMapping("/templates")
public class TemplateRestService {

    private final Logger logger = LoggerFactory.getLogger(getClass());

    @Autowired
    private ServiceContext serviceContext;

    @Autowired
    private FileUploadResponseFactory fileUploadResponseFactory;

    @Autowired
    private TemplateRepository templateRepository;

    @RequestMapping(method = RequestMethod.GET, produces = "application/vnd.openxmlformats-officedocument.wordprocessingml.document")
    public byte[] getTemplate(@RequestParam String name, @RequestParam String language,
            HttpServletResponse response) throws Exception {
        byte[] documentContent = null;
        Template<?> template = templateRepository.getTemplate(name, language);
        if (template != null) {
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            template.write(out);
            documentContent = out.toByteArray();
            response.setHeader("Content-Disposition",
                    "attachment; filename=\"" + template.getDocumentName() + ".docx\"");
        }
        return documentContent;
    }

    @RequestMapping(method = RequestMethod.POST, produces = "text/html; charset=UTF-8")
    public String updateTemplate(@RequestParam("name") String name, @RequestParam("language") String language,
            @RequestParam("file") MultipartFile file) {

        if (file.isEmpty()) {
            throw new WteFileUploadException(MessageKey.UPLOADED_FILE_NOT_READABLE);
        }

        Template<?> template = templateRepository.getTemplate(name, language);
        if (template == null) {
            throw new WteFileUploadException(MessageKey.TEMPLATE_NOT_FOUND);
        }

        try (InputStream in = file.getInputStream()) {
            template.update(in, serviceContext.getUser());
            templateRepository.persist(template);
            return fileUploadResponseFactory.createJsonSuccessResponse(MessageKey.TEMPLATE_UPLOADED);
        } catch (IOException e) {
            throw new WteFileUploadException(MessageKey.UPLOADED_FILE_NOT_READABLE);
        }
    }

    /**
     * processes template file upload and save the file on the server side in
     * temp folder. returns the path
     * 
     * @param file
     * @return
     */
    @RequestMapping(value = "temp", method = RequestMethod.POST, produces = "text/html; charset=UTF-8")
    public String uploadFile(@RequestParam("name") String name, @RequestParam("file") MultipartFile file) {
        if (file.isEmpty()) {
            throw new WteFileUploadException(MessageKey.UPLOADED_FILE_NOT_READABLE);
        }
        try {
            File tempFile = File.createTempFile(name, ".docx");
            try (OutputStream out = new FileOutputStream(tempFile); InputStream in = file.getInputStream()) {
                IOUtils.copy(in, out);
                FileUploadResponseDto response = new FileUploadResponseDto();
                response.setDone(true);
                response.setMessage(tempFile.toString());
                return fileUploadResponseFactory.toJson(response);
            }
        } catch (IOException e) {
            throw new WteFileUploadException(MessageKey.UPLOADED_FILE_NOT_READABLE);
        }
    }

    @ExceptionHandler(WteFileUploadException.class)
    public String handleException(WteFileUploadException e) {
        return fileUploadResponseFactory.createJsonErrorResponse(e.getMessageKey());
    }

    @ExceptionHandler(IllegalStateException.class)
    public String handleException(IllegalStateException e) {
        return fileUploadResponseFactory.createJsonErrorResponse(MessageKey.TEMPLATE_CLASS_NOT_FOUND);
    }

    @ExceptionHandler(WteException.class)
    public String handleException(WteException e) {
        return fileUploadResponseFactory.createJsonErrorResponse(MessageKey.UPLOADED_FILE_NOT_VALID);
    }

    @ExceptionHandler(LockingException.class)
    public String handleException(LockingException e) {
        return fileUploadResponseFactory.createJsonErrorResponse(MessageKey.LOCKED_TEMPLATE);
    }

    @ExceptionHandler(InvalidTemplateException.class)
    public String handleException(InvalidTemplateException e) {
        return fileUploadResponseFactory.createJsonErrorResponse(MessageKey.UPLOADED_FILE_NOT_VALID);
    }

    @Order(Ordered.LOWEST_PRECEDENCE)
    @ExceptionHandler(RuntimeException.class)
    public String handleException(RuntimeException e) {
        logger.error("error on processing request", e);
        return fileUploadResponseFactory.createJsonErrorResponse(MessageKey.INTERNAL_SERVER_ERROR);
    }
}