Add GetNextSerialSequence functionality to Stock services and repository

2026-10-08 12:42:50 +05:30
parent 55aa35308a
commit 702efba62e
4 changed files with 34 additions and 0 deletions
@@ -107,6 +107,26 @@ public class StockRepository(AppDBContext db) : IStockRepository
    public Task<bool> SerialNumberExistsAsync(Guid itemId, string serialNumber) =>
        db.ItemSerialNumbers.AnyAsync(s => s.FK_ItemId == itemId && s.SerialNumber == serialNumber);

+    public async Task<int> GetNextSerialSequenceAsync(Guid itemId, string prefix)
+    {
+        // Only serials of the form <prefix><digits> count; anything else (a supplier's own serial that
+        // happens to start with the prefix) is ignored for numbering.
+        var serials = await db.ItemSerialNumbers
+            .AsNoTracking()
+            .Where(s => s.FK_ItemId == itemId && s.SerialNumber.StartsWith(prefix))
+            .Select(s => s.SerialNumber)
+            .ToListAsync();
+
+        var max = 0L;
+        foreach (var serial in serials)
+        {
+            var suffix = serial[prefix.Length..];
+            if (suffix.Length is > 0 and <= 9 && suffix.All(char.IsDigit) && long.TryParse(suffix, out var n))
+                max = Math.Max(max, n);
+        }
+        return (int)max + 1;
+    }
+
    public async Task AddItemSerialNumberAsync(ItemSerialNumber serial) =>
        await db.ItemSerialNumbers.AddAsync(serial);
 }