Add AI summary and quality score fields to assignment submissions

src/main/java/com/open/spring/mvc/assignments/AssignmentSubmission.java

@@ -63,6 +63,11 @@ public class AssignmentSubmission {
     private Double grade;
     private String feedback;
 
+    @Column(columnDefinition = "text")
+    private String aiSummary;
+
+    private Integer qualityScore;
+
     private String comment;
 
     private Long assignmentid;

src/main/java/com/open/spring/mvc/assignments/AssignmentSubmissionAPIController.java

@@ -300,10 +300,12 @@ public ResponseEntity<?> updateSubmission(
         submission.setComment(comment == null ? "" : comment);
         submission.setIsLate(Boolean.TRUE.equals(isLate));
 
-        // Only clear grade/feedback when the submission content actually changed
+        // Only clear grade/feedback/AI summary/quality score when the content actually changed
         if (contentChanged) {
             submission.setGrade(null);
             submission.setFeedback(null);
+            submission.setAiSummary(null);
+            submission.setQualityScore(null);
         }
 
         AssignmentSubmission savedSubmission = submissionRepo.save(submission);
@@ -350,6 +352,45 @@ public ResponseEntity<?> gradeSubmission(
         return ResponseEntity.ok(new AssignmentSubmissionReturnDto(savedSubmission));
     }
 
+    /**
+     * Persist an AI-generated summary for a submission (admin/teacher only).
+     *
+     * @param submissionId the ID of the submission being summarized
+     * @param summary      the generated summary text
+     * @return a ResponseEntity indicating success or an error if the submission is not found
+     */
+    @PostMapping("/summary/{submissionId}")
+    @Transactional
+    public ResponseEntity<?> saveSubmissionSummary(
+            @PathVariable Long submissionId,
+            @AuthenticationPrincipal UserDetails userDetails,
+            @RequestParam String summary,
+            @RequestParam(required = false) Integer qualityScore
+    ) {
+        Person currentUser = getAuthenticatedPerson(userDetails);
+        if (currentUser == null) {
+            return ResponseEntity.status(HttpStatus.UNAUTHORIZED)
+                    .body(Map.of("error", "Authentication required"));
+        }
+        if (!canGradeOrDeleteSubmission(currentUser)) {
+            return ResponseEntity.status(HttpStatus.FORBIDDEN)
+                    .body(Map.of("error", "Admin or teacher access required"));
+        }
+
+        AssignmentSubmission submission = submissionRepo.findById(submissionId).orElse(null);
+        if (submission == null) {
+            return ResponseEntity.status(HttpStatus.NOT_FOUND)
+                    .body(Map.of("error", "Submission not found"));
+        }
+
+        submission.setAiSummary(summary);
+        if (qualityScore != null && qualityScore >= 1 && qualityScore <= 5) {
+            submission.setQualityScore(qualityScore);
+        }
+        AssignmentSubmission savedSubmission = submissionRepo.save(submission);
+        return ResponseEntity.ok(new AssignmentSubmissionReturnDto(savedSubmission));
+    }
+
     /**
      * Delete an existing assignment submission.
      *

src/main/java/com/open/spring/mvc/assignments/AssignmentSubmissionReturnDto.java

@@ -21,6 +21,8 @@ public class AssignmentSubmissionReturnDto {
     public Double grade;
     public String feedback;
     public Boolean isLate;
+    public String aiSummary;
+    public Integer qualityScore;
 
     public AssignmentSubmissionReturnDto(AssignmentSubmission submission) {
         this.id = submission.getId();
@@ -32,5 +34,7 @@ public AssignmentSubmissionReturnDto(AssignmentSubmission submission) {
         this.grade = submission.getGrade();
         this.feedback = submission.getFeedback();
         this.isLate = submission.getIsLate();
+        this.aiSummary = submission.getAiSummary();
+        this.qualityScore = submission.getQualityScore();
     }
 }

src/main/java/com/open/spring/mvc/assignments/AssignmentSubmissionViewController.java

@@ -153,6 +153,8 @@ public static class SubmissionListDTO {
         private String feedback;
         private Boolean isLate;
         private Boolean isGroup;
+        private String aiSummary;
+        private Integer qualityScore;
 
         // Private constructor for factory use
         private SubmissionListDTO() {}
@@ -211,14 +213,18 @@ public static SubmissionListDTO from(AssignmentSubmission submission) {
                 dto.grade = submission.getGrade();
                 dto.feedback = submission.getFeedback() != null ? submission.getFeedback() : "";
                 dto.isLate = submission.getIsLate() != null ? submission.getIsLate() : false;
+                dto.aiSummary = submission.getAiSummary();
+                dto.qualityScore = submission.getQualityScore();
             } catch (Exception e) {
                 dto.content = null;
                 dto.comment = "";
                 dto.grade = null;
                 dto.feedback = "";
                 dto.isLate = false;
+                dto.aiSummary = null;
+                dto.qualityScore = null;
             }
-            
+
             return dto;
         }
 
@@ -239,6 +245,8 @@ public static SubmissionListDTO createFallback(AssignmentSubmission submission)
                 dto.grade = null;
                 dto.feedback = "";
                 dto.isLate = false;
+                dto.aiSummary = null;
+                dto.qualityScore = null;
             } catch (Exception e) {
                 logger.error("Error in SubmissionListDTO.createFallback()", e);
             }
@@ -257,6 +265,8 @@ public static SubmissionListDTO createFallback(AssignmentSubmission submission)
         public String getFeedback() { return feedback; }
         public Boolean getIsLate() { return isLate; }
         public Boolean getIsGroup() { return isGroup; }
+        public String getAiSummary() { return aiSummary; }
+        public Integer getQualityScore() { return qualityScore; }
     }
 
     /**