ADD functionality to retrieve and display clips by ID

src/main/java/com/ddf/vodsystem/configuration/SecurityConfig.java

@@ -29,6 +29,7 @@ public class SecurityConfig {
         http
                 .csrf(AbstractHttpConfigurer::disable)
                 .authorizeHttpRequests(auth -> auth
+                        .requestMatchers("/api/v1/download/clip/**").authenticated()
                         .requestMatchers("/api/v1/auth/login", "/api/v1/auth/user").permitAll()
                         .requestMatchers("/api/v1/upload", "/api/v1/download/**").permitAll()
                         .requestMatchers("/api/v1/edit/**", "/api/v1/process/**", "/api/v1/progress/**").permitAll()

src/main/java/com/ddf/vodsystem/controllers/ClipController.java

@@ -9,6 +9,7 @@ import org.springframework.security.core.annotation.AuthenticationPrincipal;
 import org.springframework.security.oauth2.core.user.OAuth2User;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
 
 import java.util.List;
@@ -33,4 +34,20 @@ public class ClipController {
                 new APIResponse<>("success", "Clips retrieved successfully", clips)
         );
     }
+
+    @GetMapping("/{id}")
+    public ResponseEntity<APIResponse<Clip>> getClipById(@AuthenticationPrincipal OAuth2User principal, @PathVariable Long id) {
+        if (principal == null) {
+            throw new NotAuthenticated("User is not authenticated");
+        }
+
+        Clip clip = clipService.getClipById(id);
+        if (clip == null) {
+            return ResponseEntity.notFound().build();
+        }
+
+        return ResponseEntity.ok(
+                new APIResponse<>("success", "Clip retrieved successfully", clip)
+        );
+    }
 }

src/main/java/com/ddf/vodsystem/controllers/DownloadController.java

@@ -7,6 +7,8 @@ import org.springframework.http.HttpHeaders;
 import org.springframework.http.MediaType;
 import org.springframework.http.MediaTypeFactory;
 import org.springframework.http.ResponseEntity;
+import org.springframework.security.core.annotation.AuthenticationPrincipal;
+import org.springframework.security.oauth2.core.user.OAuth2User;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
@@ -51,7 +53,7 @@ public class DownloadController {
     }
 
     @GetMapping("/clip/{id}")
-    public ResponseEntity<Resource> downloadClip(@PathVariable Long id) {
+    public ResponseEntity<Resource> downloadClip(@AuthenticationPrincipal OAuth2User principal, @PathVariable Long id) {
         Resource resource = downloadService.downloadClip(id);
 
         if (resource == null || !resource.exists()) {

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

@@ -100,4 +100,8 @@ public class ClipService {
         clip.setVideoPath(outputFile.getPath());
         clipRepository.save(clip);
     }
+
+    public Clip getClipById(Long id) {
+        return clipRepository.findById(id).orElse(null);
+    }
 }