feat:集成事件决策/规则/聚合管道

apps/server/services/detection_service.py

@@ -10,6 +10,10 @@ from PIL import Image, ImageDraw, ImageFont
 import torch
 
 from .loitering_service import get_loitering_service
+from .adapters import DetectionAdapter
+from .event import AlertRuleEngine, EventAggregator, EventDecisionEngine
+from core.settings import get_settings
+from models.event_schemas import DetectionSource
 
 logger = logging.getLogger(__name__)
 
@@ -19,12 +23,24 @@ class DetectionService:
         self.base_dir = os.path.dirname(os.path.dirname(__file__))
         self.results_dir = os.path.join(self.base_dir, "static", "results")
         self.temp_dir = os.path.join(self.base_dir, "static", "temp")
-        
+
         os.makedirs(self.results_dir, exist_ok=True)
         os.makedirs(self.temp_dir, exist_ok=True)
-        
+
         # 初始化徘徊检测服务（懒加载，实际初始化在第一次使用时）
         self.loitering_service = get_loitering_service()
+
+        # 事件管道 (MVP-1 / P1-P2-P5)
+        settings = get_settings()
+        self.decision_engine = EventDecisionEngine(
+            min_confidence=settings.detection.min_confidence,
+        )
+        rules_dir = os.path.join(self.base_dir, settings.event_engine.rules_dir)
+        self.rule_engine = AlertRuleEngine.from_directory(rules_dir)
+        self.event_aggregator = EventAggregator(
+            dedup_window_seconds=settings.event_engine.dedup_window_seconds,
+            max_active_events=settings.event_engine.max_active_events,
+        )
     
     async def detect_image(
         self,
@@ -133,6 +149,9 @@ class DetectionService:
                     result_data, algorithm_config
                 )
 
+            # 事件管道 (MVP-1): 决策 → 规则 → 聚合
+            result_data = self._apply_event_pipeline(result_data, model_id)
+
             return result_data
         except Exception as e:
             logger.error(f"图片检测失败: {e}")
@@ -170,7 +189,8 @@ class DetectionService:
                     
                     if draw:
                         frame = self.draw_detections(frame, detections, fps)
-                
+
+                # detect_fire_composite 已自带事件管道，此处无需再次调用
                 return frame, result_data
             
             # 普通单模型检测
@@ -294,6 +314,9 @@ class DetectionService:
             if draw:
                 frame = self.draw_detections(frame, detections, fps)
 
+            # 事件管道 (MVP-1): 决策 → 规则 → 聚合
+            result_data = self._apply_event_pipeline(result_data, model_id=model_id)
+
             return frame, result_data
         except Exception as e:
             logger.error(f"帧检测失败: {e}")
@@ -385,7 +408,7 @@ class DetectionService:
             processing_time = time.time() - start_time
             avg_confidence = sum(d['confidence'] for d in all_detections) / len(all_detections) if all_detections else 0
             
-            return {
+            result_data = {
                 'success': True,
                 'message': '复合火灾检测完成',
                 'detections': all_detections,
@@ -400,7 +423,15 @@ class DetectionService:
                     'model_used': 'fire_composite'
                 }
             }
-            
+
+            # 事件管道 (MVP-1): 复合火灾检测产出 candidate/alert 事件
+            result_data = self._apply_event_pipeline(
+                result_data,
+                model_id='fire_composite',
+                source=DetectionSource.COMPOSITE,
+            )
+            return result_data
+
         except Exception as e:
             logger.error(f"复合火灾检测失败: {e}")
             import traceback
@@ -470,6 +501,49 @@ class DetectionService:
 
         return result_data
 
+    def _apply_event_pipeline(
+        self,
+        result_data: Dict,
+        model_id: Optional[str] = None,
+        source_id: Optional[str] = None,
+        source: DetectionSource = DetectionSource.YOLO,
+    ) -> Dict:
+        """对检测结果执行 决策 → 规则 → 聚合 三段管道。
+
+        在 ``result_data`` 中追加两个字段:
+
+        - ``candidate_events``: List[dict]  决策引擎产出的候选事件
+        - ``alert_events``:    List[dict]  规则命中后经聚合的预警事件
+        """
+
+        if not result_data.get('success') or not result_data.get('detections'):
+            result_data['candidate_events'] = []
+            result_data['alert_events'] = []
+            return result_data
+
+        try:
+            unified_result = DetectionAdapter.from_yolo(
+                result_data, model_id=model_id, source=source
+            )
+            candidates = self.decision_engine.decide(unified_result, source_id=source_id)
+            alerts = self.rule_engine.evaluate(candidates)
+            emitted = self.event_aggregator.aggregate(alerts)
+
+            result_data['candidate_events'] = [
+                event.model_dump(mode='json') for event in candidates
+            ]
+            result_data['alert_events'] = [
+                event.model_dump(mode='json') for event in emitted
+            ]
+        except Exception as e:  # noqa: BLE001
+            logger.error(f"事件管道执行失败: {e}")
+            result_data['candidate_events'] = []
+            result_data['alert_events'] = []
+            result_data['event_pipeline_error'] = str(e)
+
+        return result_data
+
+
     def draw_detections(
         self,
         frame: np.ndarray,