feature: Approval and Promotion to VigilCareClinical

2026-06-26 15:05:02 +08:00
parent 470df683dd
commit 706318e5d2
40 changed files with 5639 additions and 3 deletions
@@ -0,0 +1,44 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Storage;
+
+public class MrnGenerator : IMrnGenerator
+{
+    private readonly AppDbContext _db;
+    private const string MrnPrefix = "VCR";
+    private const string SequenceName = "clinical.mrn_sequence";
+
+    public MrnGenerator(AppDbContext db)
+    {
+        _db = db;
+    }
+
+    public async Task<string> GenerateNextMrnAsync()
+    {
+        // Use PostgreSQL sequence for atomic, gap-free numbering
+        var connection = _db.Database.GetDbConnection();
+        var wasOpen = connection.State == System.Data.ConnectionState.Open;
+
+        if (!wasOpen)
+            await connection.OpenAsync();
+
+        try
+        {
+            using var command = connection.CreateCommand();
+            command.CommandText = $"SELECT nextval('{SequenceName}')";
+
+            // If we're in a transaction, enlist the command
+            if (_db.Database.CurrentTransaction is not null)
+            {
+                command.Transaction = _db.Database.CurrentTransaction.GetDbTransaction();
+            }
+
+            var nextVal = (long)(await command.ExecuteScalarAsync())!;
+            return $"{MrnPrefix}-{nextVal:D6}";
+        }
+        finally
+        {
+            if (!wasOpen)
+                await connection.CloseAsync();
+        }
+    }
+}