Add AI interview copilot flow across backend and frontend

Author: thughari

backend/src/main/java/com/thughari/jobtrackerpro/controller/InterviewController.java

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+package com.thughari.jobtrackerpro.controller;
+
+import com.thughari.jobtrackerpro.dto.*;
+import com.thughari.jobtrackerpro.service.InterviewService;
+import org.springframework.http.ResponseEntity;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.util.Map;
+import java.util.UUID;
+
+@RestController
+@RequestMapping("/api/interviews")
+public class InterviewController {
+    private final InterviewService interviewService;
+
+    public InterviewController(InterviewService interviewService) {
+        this.interviewService = interviewService;
+    }
+
+    @PostMapping("/start/{jobId}")
+    public ResponseEntity<InterviewSessionStartResponse> startInterview(@PathVariable UUID jobId) {
+        return ResponseEntity.ok(interviewService.startSession(jobId, getAuthenticatedEmail()));
+    }
+
+    @GetMapping("/{sessionId}/questions")
+    public ResponseEntity<InterviewQuestionsResponse> getQuestions(@PathVariable UUID sessionId) {
+        return ResponseEntity.ok(interviewService.getQuestions(sessionId, getAuthenticatedEmail()));
+    }
+
+    @PostMapping("/{sessionId}/answers")
+    public ResponseEntity<InterviewAnswerResponse> submitAnswer(@PathVariable UUID sessionId, @RequestBody InterviewAnswerRequest request) {
+        return ResponseEntity.ok(interviewService.submitAnswer(sessionId, getAuthenticatedEmail(), request));
+    }
+
+    @GetMapping("/{sessionId}/report")
+    public ResponseEntity<InterviewReportResponse> getReport(@PathVariable UUID sessionId) {
+        return ResponseEntity.ok(interviewService.getReport(sessionId, getAuthenticatedEmail()));
+    }
+
+    @PostMapping("/{sessionId}/resume")
+    public ResponseEntity<Map<String, String>> uploadResume(@PathVariable UUID sessionId, @RequestParam("file") MultipartFile file) {
+        interviewService.uploadResume(sessionId, getAuthenticatedEmail(), file);
+        return ResponseEntity.ok(Map.of("status", "processed"));
+    }
+
+    private String getAuthenticatedEmail() {
+        return ((String) SecurityContextHolder.getContext().getAuthentication().getPrincipal()).toLowerCase();
+    }
+}

backend/src/main/java/com/thughari/jobtrackerpro/dto/InterviewAnswerRequest.java

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+package com.thughari.jobtrackerpro.dto;
+
+import lombok.Data;
+
+@Data
+public class InterviewAnswerRequest {
+    private Integer questionIndex;
+    private String answer;
+}

backend/src/main/java/com/thughari/jobtrackerpro/dto/InterviewAnswerResponse.java

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+package com.thughari.jobtrackerpro.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+@Data
+@AllArgsConstructor
+public class InterviewAnswerResponse {
+    private Integer score;
+    private String feedback;
+    private String improvementGap;
+    private Integer nextQuestionIndex;
+    private boolean completed;
+}

backend/src/main/java/com/thughari/jobtrackerpro/dto/InterviewQuestionDTO.java

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+package com.thughari.jobtrackerpro.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+@Data
+@AllArgsConstructor
+public class InterviewQuestionDTO {
+    private Integer index;
+    private String question;
+}

backend/src/main/java/com/thughari/jobtrackerpro/dto/InterviewQuestionsResponse.java

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+package com.thughari.jobtrackerpro.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+import java.util.List;
+
+@Data
+@AllArgsConstructor
+public class InterviewQuestionsResponse {
+    private List<InterviewQuestionDTO> questions;
+    private Integer currentIndex;
+    private Integer totalQuestions;
+}

backend/src/main/java/com/thughari/jobtrackerpro/dto/InterviewReportResponse.java

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+package com.thughari.jobtrackerpro.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+import java.util.List;
+
+@Data
+@AllArgsConstructor
+public class InterviewReportResponse {
+    private Integer overallScore;
+    private Integer answeredQuestions;
+    private Integer totalQuestions;
+    private List<String> weakAreas;
+    private List<String> improvementSuggestions;
+}

backend/src/main/java/com/thughari/jobtrackerpro/dto/InterviewSessionStartResponse.java

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+package com.thughari.jobtrackerpro.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+import java.util.UUID;
+
+@Data
+@AllArgsConstructor
+public class InterviewSessionStartResponse {
+    private UUID sessionId;
+    private String status;
+    private String message;
+}

backend/src/main/java/com/thughari/jobtrackerpro/entity/InterviewSession.java

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+package com.thughari.jobtrackerpro.entity;
+
+import jakarta.persistence.*;
+import lombok.Data;
+
+import java.time.LocalDateTime;
+import java.util.UUID;
+
+@Data
+@Entity
+@Table(name = "interview_sessions", indexes = {
+        @Index(name = "idx_interview_sessions_user_updated", columnList = "userEmail, updatedAt DESC")
+})
+public class InterviewSession {
+    @Id
+    @GeneratedValue(strategy = GenerationType.UUID)
+    @Column(columnDefinition = "uuid")
+    private UUID id;
+
+    @Column(nullable = false)
+    private String userEmail;
+
+    @Column(nullable = false, columnDefinition = "uuid")
+    private UUID jobId;
+
+    private String jobCompany;
+    private String jobRole;
+
+    @Column(nullable = false)
+    private String status;
+
+    private Integer currentQuestionIndex;
+    private Integer totalQuestions;
+    private Double overallScore;
+
+    @Lob
+    @Column(columnDefinition = "TEXT")
+    private String questionsJson;
+
+    @Lob
+    @Column(columnDefinition = "TEXT")
+    private String answersJson;
+
+    @Lob
+    @Column(columnDefinition = "TEXT")
+    private String weakAreasJson;
+
+    @Lob
+    @Column(columnDefinition = "TEXT")
+    private String improvementSuggestionsJson;
+
+    private String resumeFileName;
+    private String resumeProcessingStatus;
+
+    @Column(nullable = false)
+    private LocalDateTime createdAt;
+
+    @Column(nullable = false)
+    private LocalDateTime updatedAt;
+}

backend/src/main/java/com/thughari/jobtrackerpro/repo/InterviewSessionRepository.java

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+package com.thughari.jobtrackerpro.repo;
+
+import com.thughari.jobtrackerpro.entity.InterviewSession;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.Optional;
+import java.util.UUID;
+
+public interface InterviewSessionRepository extends JpaRepository<InterviewSession, UUID> {
+    Optional<InterviewSession> findByIdAndUserEmail(UUID id, String userEmail);
+}