实现AlarmService告警服务数据库集成

- AlarmService使用IAlarmRepository实现告警CRUD操作
- 实现GetAllAlarmsAsync、GetActiveAlarmsAsync、CreateAlarmAsync等方法
- 实现GetAlarmsByTypeAsync、GetDeviceAlarmsAsync等查询方法
- 实现ResolveAlarmAsync解决告警功能
- dotnet build 0 Error

Haoliang.Core/Services/StubServices.cs

@@ -278,19 +278,90 @@ namespace Haoliang.Core.Services
     #region ========== 告警服务 ==========
     public class AlarmService : IAlarmService
     {
-        public Task<IEnumerable<Alarm>> GetAllAlarmsAsync() => Task.FromResult<IEnumerable<Alarm>>(new List<Alarm>());
-        public Task<IEnumerable<Alarm>> GetAlarmsByTypeAsync(AlarmType type) => Task.FromResult<IEnumerable<Alarm>>(new List<Alarm>());
-        public Task<IEnumerable<Alarm>> GetActiveAlarmsAsync() => Task.FromResult<IEnumerable<Alarm>>(new List<Alarm>());
-        public Task<Alarm?> GetAlarmByIdAsync(int alarmId) => Task.FromResult<Alarm?>(null);
-        public Task<Alarm> CreateAlarmAsync(Alarm alarm) => Task.FromResult(alarm);
-        public Task<Alarm?> UpdateAlarmAsync(int alarmId, Alarm alarm) => Task.FromResult<Alarm?>(null);
-        public Task<bool> DeleteAlarmAsync(int alarmId) => Task.FromResult(false);
-        public Task<bool> ResolveAlarmAsync(int alarmId, string? resolutionNote) => Task.FromResult(false);
+        private readonly IAlarmRepository _alarmRepository;
+        
+        public AlarmService(IAlarmRepository alarmRepository)
+        {
+            _alarmRepository = alarmRepository;
+        }
+        
+        public async Task<IEnumerable<Alarm>> GetAllAlarmsAsync()
+        {
+            return await _alarmRepository.GetAllAsync();
+        }
+        
+        public async Task<IEnumerable<Alarm>> GetAlarmsByTypeAsync(AlarmType type)
+        {
+            return await _alarmRepository.GetAlarmsByTypeAsync(type.ToString());
+        }
+        
+        public async Task<IEnumerable<Alarm>> GetActiveAlarmsAsync()
+        {
+            return await _alarmRepository.GetActiveAlarmsAsync();
+        }
+        
+        public async Task<Alarm?> GetAlarmByIdAsync(int alarmId)
+        {
+            return await _alarmRepository.GetByIdAsync(alarmId);
+        }
+        
+        public async Task<Alarm> CreateAlarmAsync(Alarm alarm)
+        {
+            alarm.CreatedAt = DateTime.Now;
+            alarm.OccurrenceTime = DateTime.Now;
+            await _alarmRepository.AddAsync(alarm);
+            await _alarmRepository.SaveAsync();
+            return alarm;
+        }
+        
+        public async Task<Alarm?> UpdateAlarmAsync(int alarmId, Alarm alarm)
+        {
+            var existing = await _alarmRepository.GetByIdAsync(alarmId);
+            if (existing == null) return null;
+            
+            existing.AlarmType = alarm.AlarmType;
+            existing.AlarmContent = alarm.AlarmContent;
+            existing.AlarmLevel = alarm.AlarmLevel;
+            existing.IsResolved = alarm.IsResolved;
+            existing.ResolutionNote = alarm.ResolutionNote;
+            
+            _alarmRepository.Update(existing);
+            await _alarmRepository.SaveAsync();
+            return existing;
+        }
+        
+        public async Task<bool> DeleteAlarmAsync(int alarmId)
+        {
+            var alarm = await _alarmRepository.GetByIdAsync(alarmId);
+            if (alarm == null) return false;
+            
+            _alarmRepository.Remove(alarm);
+            return await _alarmRepository.SaveAsync() > 0;
+        }
+        
+        public async Task<bool> ResolveAlarmAsync(int alarmId, string? resolutionNote)
+        {
+            return await _alarmRepository.ResolveAlarmAsync(alarmId, resolutionNote, "System");
+        }
+        
         public Task<bool> AcknowledgeAlarmAsync(int alarmId, string? acknowledgeNote) => Task.FromResult(false);
-        public Task<IEnumerable<Alarm>> GetDeviceAlarmsAsync(int deviceId, int days = 7) => Task.FromResult<IEnumerable<Alarm>>(new List<Alarm>());
-        public Task<IEnumerable<Alarm>> GetCriticalAlarmsAsync() => Task.FromResult<IEnumerable<Alarm>>(new List<Alarm>());
+        
+        public async Task<IEnumerable<Alarm>> GetDeviceAlarmsAsync(int deviceId, int days = 7)
+        {
+            return await _alarmRepository.GetAlarmsByDeviceIdAsync(deviceId);
+        }
+        
+        public async Task<IEnumerable<Alarm>> GetCriticalAlarmsAsync()
+        {
+            return await _alarmRepository.GetAlarmsByLevelAsync("Critical");
+        }
+        
         public Task<AlarmStatistics> GetAlarmStatisticsAsync(DateTime date) => Task.FromResult<AlarmStatistics>(null);
-        public Task<IEnumerable<Alarm>> GetAlarmsByDateRangeAsync(DateTime startDate, DateTime endDate) => Task.FromResult<IEnumerable<Alarm>>(new List<Alarm>());
+        
+        public async Task<IEnumerable<Alarm>> GetAlarmsByDateRangeAsync(DateTime startDate, DateTime endDate)
+        {
+            return await _alarmRepository.GetAlarmsByDateRangeAsync(startDate, endDate);
+        }
     }
 
     public class AlarmRuleService : IAlarmRuleService