fix: rebuild MES as compilable go-zero+ent backend (renamed bj_power_mes), restore 3 workstation projects from pristine original, align naming; all Go projects go build clean

bj_power_mes/internal/alarm/service.go

@@ -0,0 +1,54 @@
+package alarm
+
+import (
+	"context"
+	"fmt"
+	"log/slog"
+
+	"bj_power_mes/constants"
+	"bj_power_mes/ent"
+	"bj_power_mes/ent/alarm"
+	"bj_power_mes/internal/eventbus"
+)
+
+// Service 报警服务，负责创建报警并发布事件。
+type Service struct {
+	entClient *ent.Client
+	bus       eventbus.Bus
+}
+
+// NewService 创建报警服务。
+func NewService(entClient *ent.Client, bus eventbus.Bus) *Service {
+	return &Service{entClient: entClient, bus: bus}
+}
+
+// Raise 创建报警并发布 ALARM_RAISED 事件。
+func (s *Service) Raise(ctx context.Context, alarmCode string, alarmMessage string,
+	level constants.AlarmLevel, equipmentID int, jobID int, source string) (*ent.Alarm, error) {
+
+	a, err := s.entClient.Alarm.Create().
+		SetAlarmCode(alarmCode).
+		SetAlarmMessage(alarmMessage).
+		SetLevel(level).
+		SetNillableEquipmentId(&equipmentID).
+		SetNillableJobId(&jobID).
+		SetSource(source).
+		Save(ctx)
+	if err != nil {
+		return nil, fmt.Errorf("create alarm: %w", err)
+	}
+
+	evt := eventbus.NewAlarmRaisedEvent(a.ID, alarmCode, string(level), equipmentID, source)
+	if err := s.bus.Publish(ctx, evt); err != nil {
+		slog.Error("alarm: publish event failed", "alarmId", a.ID, "error", err)
+	}
+
+	return a, nil
+}
+
+// FindActive 检查是否已存在同编码的未处理报警（去重）。
+func (s *Service) FindActive(ctx context.Context, alarmCode string) (*ent.Alarm, error) {
+	return s.entClient.Alarm.Query().
+		Where(alarm.AlarmCodeEQ(alarmCode), alarm.ResolvedEQ(false)).
+		First(ctx)
+}