feat(markers): implement marker entity & service

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

@@ -108,4 +108,11 @@ public class GlobalExceptionHandler {
         APIResponse<Void> response = new APIResponse<>(ERROR, ex.getMessage(), null);
         return ResponseEntity.status(HttpStatus.NOT_FOUND).body(response);
     }
+
+    @ExceptionHandler(NotStreaming.class)
+    public ResponseEntity<APIResponse<Void>> handleNotStreaming(NotStreaming ex) {
+        logger.error("NotStreaming: {}", ex.getMessage());
+        APIResponse<Void> response = new APIResponse<>(ERROR, ex.getMessage(), null);
+        return ResponseEntity.status(HttpStatus.CONFLICT).body(response);
+    }
 }

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

@@ -0,0 +1,54 @@
+package com.ddf.vodsystem.controllers;
+
+import com.ddf.vodsystem.controllers.dto.MarkerCreateRequest;
+import com.ddf.vodsystem.controllers.dto.MarkerResponse;
+import com.ddf.vodsystem.dto.APIResponse;
+import com.ddf.vodsystem.entities.Marker;
+import com.ddf.vodsystem.services.MarkerService;
+import jakarta.validation.Valid;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/api/v1/markers")
+public class MarkerController {
+    private static final String SUCCESS = "success";
+
+    private final MarkerService markerService;
+
+    public MarkerController(MarkerService markerService) {
+        this.markerService = markerService;
+    }
+
+    @GetMapping("")
+    public ResponseEntity<APIResponse<List<MarkerResponse>>> getMarkers() {
+        List<MarkerResponse> markers = markerService.getUserMarkers().stream()
+                .map(this::convertToDTO)
+                .toList();
+
+        return ResponseEntity.ok(
+                new APIResponse<>(SUCCESS, "Markers retrieved successfully", markers)
+        );
+    }
+
+    @PostMapping("")
+    public ResponseEntity<APIResponse<MarkerResponse>> createMarker(@Valid @RequestBody MarkerCreateRequest request) {
+        Marker marker = markerService.create(request.message());
+
+        return ResponseEntity.ok(
+                new APIResponse<>(SUCCESS, "Marker created successfully", convertToDTO(marker))
+        );
+    }
+
+    private MarkerResponse convertToDTO(Marker marker) {
+        return new MarkerResponse(
+                marker.getId(),
+                marker.getUser().getId(),
+                marker.getStream().getId(),
+                marker.getMessage(),
+                marker.getTimestamp()
+        );
+    }
+}

src/main/java/com/ddf/vodsystem/controllers/dto/MarkerCreateRequest.java

@@ -0,0 +1,7 @@
+package com.ddf.vodsystem.controllers.dto;
+
+import jakarta.validation.constraints.NotBlank;
+
+public record MarkerCreateRequest(
+        @NotBlank String message
+) {}

src/main/java/com/ddf/vodsystem/controllers/dto/MarkerResponse.java

@@ -0,0 +1,11 @@
+package com.ddf.vodsystem.controllers.dto;
+
+import java.time.Instant;
+
+public record MarkerResponse(
+        Long id,
+        Long userId,
+        Long streamId,
+        String message,
+        Instant timestamp
+) {}