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Merge pull request #140 from HGU-WALAB/HISTUDY-139
Feat: 스터디 보고서 이미지 업로드 (#139)
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7 changes: 7 additions & 0 deletions
7
src/main/java/edu/handong/csee/histudy/exception/FileTransferException.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,7 @@ | ||
| package edu.handong.csee.histudy.exception; | ||
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| public class FileTransferException extends RuntimeException { | ||
| public FileTransferException() { | ||
| super("이미지를 저장하는데 실패했습니다."); | ||
| } | ||
| } |
142 changes: 142 additions & 0 deletions
142
src/main/java/edu/handong/csee/histudy/service/ImageService.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,142 @@ | ||
| package edu.handong.csee.histudy.service; | ||
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| import edu.handong.csee.histudy.domain.Image; | ||
| import edu.handong.csee.histudy.exception.FileTransferException; | ||
| import edu.handong.csee.histudy.exception.ReportNotFoundException; | ||
| import edu.handong.csee.histudy.repository.GroupReportRepository; | ||
| import edu.handong.csee.histudy.util.Utils; | ||
| import org.apache.commons.io.IOUtils; | ||
| import org.springframework.beans.factory.annotation.Value; | ||
| import org.springframework.core.io.Resource; | ||
| import org.springframework.core.io.UrlResource; | ||
| import org.springframework.stereotype.Service; | ||
| import org.springframework.transaction.annotation.Transactional; | ||
| import org.springframework.web.multipart.MultipartFile; | ||
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| import java.io.File; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.net.MalformedURLException; | ||
| import java.net.URL; | ||
| import java.nio.file.Files; | ||
| import java.nio.file.Path; | ||
| import java.nio.file.Paths; | ||
| import java.util.Arrays; | ||
| import java.util.List; | ||
| import java.util.Objects; | ||
| import java.util.Optional; | ||
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| import static org.springframework.util.ResourceUtils.isUrl; | ||
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| @Service | ||
| @Transactional | ||
| public class ImageService { | ||
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| @Value("${custom.resource.location}") | ||
| private String imageBaseLocation; | ||
| private final GroupReportRepository groupReportRepository; | ||
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| public ImageService(GroupReportRepository groupReportRepository) { | ||
| this.groupReportRepository = groupReportRepository; | ||
| } | ||
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| public String getImagePaths(MultipartFile imageAsFormData, Integer tag, Optional<Long> reportIdOr) { | ||
| if (reportIdOr.isPresent()) { | ||
| Long id = reportIdOr.get(); | ||
| Optional<String> sameResource = getSameContent(imageAsFormData, id); | ||
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| if (sameResource.isPresent()) { | ||
| return sameResource.get(); | ||
| } | ||
| } | ||
| int year = Utils.getCurrentYear(); | ||
| int semester = Utils.getCurrentSemester(); | ||
| String formattedDateTime = Utils.getCurrentFormattedDateTime("yyyyMMdd_HHmmss"); | ||
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| String originalName = Objects.requireNonNullElse(imageAsFormData.getOriginalFilename(), ".jpg"); | ||
| String extension = originalName.substring(originalName.lastIndexOf(".")); | ||
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| // yyyy-{1|2}-group{%02d}-report_{yyyyMMdd}_{HHmmss}.{extension} | ||
| // e.g. 2023-2-group1-report_20230923_123456.jpg | ||
| String pathname = String.format("%d-%d-group%02d-report_%s%s", | ||
| year, | ||
| semester, | ||
| tag, | ||
| formattedDateTime, | ||
| extension); | ||
| return saveImage(imageAsFormData, pathname); | ||
| } | ||
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| private String saveImage( | ||
| MultipartFile image, | ||
| String pathname) { | ||
| try { | ||
| File file = new File(imageBaseLocation + File.separator + pathname); | ||
| File dir = file.getParentFile(); | ||
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| if (!dir.exists()) { | ||
| dir.mkdirs(); | ||
| } | ||
| image.transferTo(file); | ||
| return pathname; | ||
| } catch (IOException e) { | ||
| throw new FileTransferException(); | ||
| } | ||
| } | ||
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| private Optional<String> getSameContent(MultipartFile src, Long reportId) { | ||
| List<String> targetPaths = groupReportRepository.findById(reportId) | ||
| .orElseThrow(ReportNotFoundException::new) | ||
| .getImages() | ||
| .stream() | ||
| .map(Image::getPath) | ||
| .toList(); | ||
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| return targetPaths.stream() | ||
| .filter(path -> { | ||
| try { | ||
| return (isUrl(path)) | ||
| ? contentMatches(src, new URL(path)) | ||
| : contentMatches(src, Path.of(path)); | ||
| } catch (MalformedURLException e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| }).findAny(); | ||
| } | ||
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| private boolean contentMatches(MultipartFile src, Path targetPath) { | ||
| try { | ||
| byte[] targetContent = Files.readAllBytes(targetPath); | ||
| return contentMatches(src.getBytes(), targetContent); | ||
| } catch (IOException e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| } | ||
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| private boolean contentMatches(MultipartFile src, URL targetPath) { | ||
| try (InputStream in = targetPath.openStream()) { | ||
| byte[] targetContent = IOUtils.toByteArray(in); | ||
| return contentMatches(src.getBytes(), targetContent); | ||
| } catch (IOException e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| } | ||
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| private boolean contentMatches(byte[] sourceContent, byte[] targetContent) { | ||
| return Arrays.equals(sourceContent, targetContent); | ||
| } | ||
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| public Resource fetchImage(String imageName) { | ||
| try { | ||
| Path path = Paths.get(imageBaseLocation + imageName); | ||
| Resource resource = new UrlResource(path.toUri()); | ||
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| if (resource.exists() && resource.isReadable()) { | ||
| return resource; | ||
| } | ||
| throw new RuntimeException(); | ||
| } catch (MalformedURLException e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,22 @@ | ||
| package edu.handong.csee.histudy.util; | ||
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| import java.time.LocalDate; | ||
| import java.time.LocalDateTime; | ||
| import java.time.format.DateTimeFormatter; | ||
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| public class Utils { | ||
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| public static int getCurrentSemester() { | ||
| int month = LocalDate.now().getMonthValue(); | ||
| return (month >= 3 && month <= 8) ? 1 : 2; | ||
| } | ||
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| public static int getCurrentYear() { | ||
| return LocalDate.now().getYear(); | ||
| } | ||
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| public static String getCurrentFormattedDateTime(String pattern) { | ||
| return LocalDateTime.now() | ||
| .format(DateTimeFormatter.ofPattern(pattern)); | ||
| } | ||
| } |