feature: Schema, Migrations, Core CRUD, and Redis Threshold Cache

2026-06-16 17:59:16 +08:00
commit 882d4af3e6
63 changed files with 3923 additions and 0 deletions
@@ -0,0 +1,104 @@
+using System.Text.Json;
+using Microsoft.EntityFrameworkCore;
+using StackExchange.Redis;
+
+public static class DataSeeder
+{
+    public static async Task SeedAsync(AppDbContext db, IConnectionMultiplexer redis)
+    {
+        if (await db.Patients.AnyAsync()) return;
+
+        // Two patients
+        var patient1 = new Patient
+        {
+            Id = Guid.NewGuid(), Mrn = "MRN-000001", FirstName = "Jane", LastName = "Smith",
+            DateOfBirth = new DateOnly(1975, 4, 12), Gender = "F",
+            CreatedAt = DateTimeOffset.UtcNow
+        };
+        var patient2 = new Patient
+        {
+            Id = Guid.NewGuid(), Mrn = "MRN-000002", FirstName = "Robert", LastName = "Chen",
+            DateOfBirth = new DateOnly(1962, 9, 3), Gender = "M",
+            CreatedAt = DateTimeOffset.UtcNow
+        };
+        db.Patients.AddRange(patient1, patient2);
+
+        // One active inpatient encounter per patient
+        var encounter1 = new Encounter
+        {
+            Id = Guid.NewGuid(), PatientId = patient1.Id, EncounterType = EncounterType.Inpatient,
+            Status = EncounterStatus.Active, Department = "ICU",
+            AttendingPhysician = "Dr. Osei", AdmittedAt = DateTimeOffset.UtcNow.AddHours(-6),
+            CreatedAt = DateTimeOffset.UtcNow.AddHours(-6)
+        };
+        var encounter2 = new Encounter
+        {
+            Id = Guid.NewGuid(), PatientId = patient2.Id, EncounterType = EncounterType.Inpatient,
+            Status = EncounterStatus.Active, Department = "General Medicine",
+            AttendingPhysician = "Dr. Patel", AdmittedAt = DateTimeOffset.UtcNow.AddHours(-12),
+            CreatedAt = DateTimeOffset.UtcNow.AddHours(-12)
+        };
+        db.Encounters.AddRange(encounter1, encounter2);
+
+        // Four alert thresholds
+        var thresholds = new List<AlertThreshold>
+        {
+            new() {
+                Id = Guid.NewGuid(), ObservationCode = "HEART_RATE", DisplayName = "Heart Rate",
+                Unit = "bpm", CriticalLow = 30, WarningLow = 50, WarningHigh = 100, CriticalHigh = 150,
+                CreatedAt = DateTimeOffset.UtcNow
+            },
+            new() {
+                Id = Guid.NewGuid(), ObservationCode = "TEMP_C", DisplayName = "Body Temperature",
+                Unit = "°C", CriticalLow = 35.0m, WarningLow = 36.0m, WarningHigh = 38.3m, CriticalHigh = 40.0m,
+                CreatedAt = DateTimeOffset.UtcNow
+            },
+            new() {
+                Id = Guid.NewGuid(), ObservationCode = "POTASSIUM_MEQ_L", DisplayName = "Serum Potassium",
+                Unit = "mEq/L", CriticalLow = 2.5m, WarningLow = 3.5m, WarningHigh = 5.0m, CriticalHigh = 6.5m,
+                CreatedAt = DateTimeOffset.UtcNow
+            },
+            new() {
+                Id = Guid.NewGuid(), ObservationCode = "SPO2", DisplayName = "Oxygen Saturation",
+                Unit = "%", CriticalLow = 88, WarningLow = 92, WarningHigh = null, CriticalHigh = null,
+                CreatedAt = DateTimeOffset.UtcNow
+            }
+        };
+        db.AlertThresholds.AddRange(thresholds);
+
+        // Observations spanning normal, warning, and critical ranges for encounter1
+        var now = DateTimeOffset.UtcNow;
+        var observations = new List<Observation>
+        {
+            // Normal heart rate
+            new() { Id = Guid.NewGuid(), EncounterId = encounter1.Id, ObservationCode = "HEART_RATE",
+                Value = 78, Unit = "bpm", Source = ObservationSource.Device, RecordedAt = now.AddMinutes(-30), CreatedAt = now.AddMinutes(-30) },
+            // Warning heart rate
+            new() { Id = Guid.NewGuid(), EncounterId = encounter1.Id, ObservationCode = "HEART_RATE",
+                Value = 104, Unit = "bpm", Source = ObservationSource.Device, RecordedAt = now.AddMinutes(-15), CreatedAt = now.AddMinutes(-15) },
+            // Critical potassium (low)
+            new() { Id = Guid.NewGuid(), EncounterId = encounter1.Id, ObservationCode = "POTASSIUM_MEQ_L",
+                Value = 2.3m, Unit = "mEq/L", Source = ObservationSource.Lab, RecordedAt = now.AddMinutes(-10), CreatedAt = now.AddMinutes(-10) },
+            // Normal SpO2
+            new() { Id = Guid.NewGuid(), EncounterId = encounter1.Id, ObservationCode = "SPO2",
+                Value = 97, Unit = "%", Source = ObservationSource.Device, RecordedAt = now.AddMinutes(-5), CreatedAt = now.AddMinutes(-5) },
+            // Normal temp for encounter2
+            new() { Id = Guid.NewGuid(), EncounterId = encounter2.Id, ObservationCode = "TEMP_C",
+                Value = 37.1m, Unit = "°C", Source = ObservationSource.Manual, RecordedAt = now.AddMinutes(-20), CreatedAt = now.AddMinutes(-20) }
+        };
+        db.Observations.AddRange(observations);
+
+        await db.SaveChangesAsync();
+
+        // Populate Redis cache with the seeded thresholds
+        var cache = redis.GetDatabase();
+        foreach (var t in thresholds)
+        {
+            var json = JsonSerializer.Serialize(new
+            {
+                t.ObservationCode, t.CriticalLow, t.WarningLow, t.WarningHigh, t.CriticalHigh
+            });
+            await cache.StringSetAsync($"threshold:{t.ObservationCode}", json);
+        }
+    }
+}