ADD thumbnail to database (#12)

* ADD thumbnail to database

* ADD thumbnail generation and retrieval functionality

* ADD thumbnail availability check in VideoCard component

* ADD ClipDTO to reduce exposed internals

* REFactor move APIResponse and VideoMetadata to dto package

* REMOVE unused props from VideoCard

* ADD isThumbnailAvailable function

src/main/java/com/ddf/vodsystem/services/ClipService.java

@@ -1,5 +1,6 @@
 package com.ddf.vodsystem.services;
 
+import com.ddf.vodsystem.dto.VideoMetadata;
 import com.ddf.vodsystem.entities.*;
 
 import java.io.File;
@@ -83,8 +84,20 @@ public class ClipService {
     private void persistClip(VideoMetadata videoMetadata, User user, Job job) {
         // Move clip from temp to output directory
         String fileExtension = directoryService.getFileExtension(job.getOutputFile().getAbsolutePath());
-        File outputFile = directoryService.getOutputFile(job.getUuid(), fileExtension);
-        directoryService.copyFile(job.getOutputFile(), outputFile);
+
+        File clipOutputDir = directoryService.getUserClipsDir(user.getId());
+        File clipOutputFile = new File(clipOutputDir, job.getUuid() + "." + fileExtension);
+        directoryService.copyFile(job.getOutputFile(), clipOutputFile);
+
+        File thumbnailOutputDir = directoryService.getUserThumbnailsDir(user.getId());
+        File thumbnailOutputFile = new File(thumbnailOutputDir, job.getUuid() + ".png");
+
+        try {
+            ffmpegService.generateThumbnail(clipOutputFile, thumbnailOutputFile, 0.0f);
+        } catch (IOException | InterruptedException e) {
+            logger.error("Error generating thumbnail for clip: {}", e.getMessage());
+            Thread.currentThread().interrupt();
+        }
 
         // Save clip to database
         Clip clip = new Clip();
@@ -97,7 +110,8 @@ public class ClipService {
         clip.setFps(videoMetadata.getFps());
         clip.setDuration(videoMetadata.getEndPoint() - videoMetadata.getStartPoint());
         clip.setFileSize(videoMetadata.getFileSize());
-        clip.setVideoPath(outputFile.getPath());
+        clip.setVideoPath(clipOutputFile.getPath());
+        clip.setThumbnailPath(thumbnailOutputFile.getPath());
         clipRepository.save(clip);
     }
 

src/main/java/com/ddf/vodsystem/services/DirectoryService.java

@@ -61,6 +61,32 @@ public class DirectoryService {
         return new File(dir);
     }
 
+    public File getUserClipsDir(Long userId) {
+        if (userId == null) {
+            throw new IllegalArgumentException("User ID cannot be null");
+        }
+
+        String dir = outputDir + File.separator + userId + File.separator + "clips";
+        return new File(dir);
+    }
+
+    public File getUserThumbnailsDir(Long userId) {
+        if (userId == null) {
+            throw new IllegalArgumentException("User ID cannot be null");
+        }
+
+        String dir = outputDir + File.separator + userId + File.separator + "thumbnails";
+        File thumbnailDir = new File(dir);
+
+        try {
+            createDirectory(thumbnailDir.getAbsolutePath());
+        } catch (IOException e) {
+            logger.error("Error creating thumbnails directory: {}", e.getMessage());
+        }
+
+        return thumbnailDir;
+    }
+
     public void saveAtDir(File file, MultipartFile multipartFile) {
         try {
             createDirectory(file.getAbsolutePath());
@@ -118,7 +144,6 @@ public class DirectoryService {
                 Files.delete(f.toPath());
             }
         }
-
     }
 
     @PostConstruct

src/main/java/com/ddf/vodsystem/services/DownloadService.java

@@ -65,4 +65,19 @@ public class DownloadService {
         Clip clip = clipRepository.findById(id).orElseThrow(() -> new JobNotFound("Clip not found with id: " + id));
         return downloadClip(clip);
     }
+
+    public Resource downloadThumbnail(Clip clip) {
+        String path = clip.getThumbnailPath();
+        File file = new File(path);
+        if (!file.exists()) {
+            throw new JobNotFound("Thumbnail file not found");
+        }
+
+        return new FileSystemResource(file);
+    }
+
+    public Resource downloadThumbnail(Long id) {
+        Clip clip = clipRepository.findById(id).orElseThrow(() -> new JobNotFound("Clip not found with id: " + id));
+        return downloadThumbnail(clip);
+    }
 }

src/main/java/com/ddf/vodsystem/services/EditService.java

@@ -1,5 +1,6 @@
 package com.ddf.vodsystem.services;
 
+import com.ddf.vodsystem.dto.VideoMetadata;
 import com.ddf.vodsystem.entities.*;
 import org.springframework.stereotype.Service;
 

src/main/java/com/ddf/vodsystem/services/FfmpegService.java

@@ -1,6 +1,6 @@
 package com.ddf.vodsystem.services;
 
-import com.ddf.vodsystem.entities.VideoMetadata;
+import com.ddf.vodsystem.dto.VideoMetadata;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.stereotype.Service;
@@ -48,6 +48,35 @@ public class FfmpegService {
         runWithProgress(inputFile, outputFile, videoMetadata, new AtomicReference<>(0f));
     }
 
+    public void generateThumbnail(File inputFile, File outputFile, Float time) throws IOException, InterruptedException {
+        logger.info("Generating thumbnail at {} seconds", time);
+
+        List<String> command = new ArrayList<>();
+        command.add("ffmpeg");
+        command.add("-ss");
+        command.add(time.toString());
+        command.add("-i");
+        command.add(inputFile.getAbsolutePath());
+        command.add("-frames:v");
+        command.add("1");
+        command.add(outputFile.getAbsolutePath());
+
+        String strCommand = String.join(" ", command);
+        logger.info("FFMPEG thumbnail command: {}", strCommand);
+
+        ProcessBuilder processBuilder = new ProcessBuilder(command);
+        processBuilder.redirectErrorStream(true);
+
+        Process process = processBuilder.start();
+
+        if (process.waitFor() != 0) {
+            logger.error("FFMPEG process failed to generate thumbnail");
+            throw new IOException("FFMPEG process failed to generate thumbnail");
+        }
+
+        logger.info("Thumbnail generated successfully at {}", outputFile.getAbsolutePath());
+    }
+
     private void updateJobProgress(Process process, AtomicReference<Float> progress, Float length) throws IOException {
         BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
 

src/main/java/com/ddf/vodsystem/services/MetadataService.java

@@ -1,6 +1,6 @@
 package com.ddf.vodsystem.services;
 
-import com.ddf.vodsystem.entities.VideoMetadata;
+import com.ddf.vodsystem.dto.VideoMetadata;
 import com.ddf.vodsystem.exceptions.FFMPEGException;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;

src/main/java/com/ddf/vodsystem/services/UploadService.java

@@ -1,7 +1,7 @@
 package com.ddf.vodsystem.services;
 
 import com.ddf.vodsystem.entities.Job;
-import com.ddf.vodsystem.entities.VideoMetadata;
+import com.ddf.vodsystem.dto.VideoMetadata;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.web.multipart.MultipartFile;