MRB webassembly

MesaFabApproval.API/Services/CAService.cs

@@ -0,0 +1,46 @@
+using Microsoft.Extensions.Caching.Memory;
+
+namespace MesaFabApproval.API.Services;
+
+public interface ICAService {
+    Task<bool> IsValidCANumber(int number);
+}
+
+public class CAService : ICAService {
+    private readonly ILogger<CAService> _logger;
+    private readonly IMemoryCache _cache;
+    private readonly IDalService _dalService;
+
+    public CAService(ILogger<CAService> logger, IMemoryCache cache, IDalService dalService) {
+        _logger = logger ?? throw new ArgumentNullException("ILogger not injected");
+        _cache = cache ?? throw new ArgumentNullException("IMemoryCache not injected");
+        _dalService = dalService ?? throw new ArgumentNullException("IDalService not injected");
+    }
+
+    public async Task<bool> IsValidCANumber(int number) {
+        try {
+            _logger.LogInformation($"Attempting to determine if {number} is a valid CA#");
+
+            if (number <= 0) return false;
+
+            IEnumerable<int> caNumbers = _cache.Get<IEnumerable<int>>("caNumbers") ?? new HashSet<int>();
+
+            if (caNumbers.Contains(number)) return true;
+
+            string sql = $"select count(CANo) as count from _8DCorrectiveAction where CANo={number}";
+
+            int rowsReturned = (await _dalService.QueryAsync<int>(sql)).FirstOrDefault();
+
+            if (rowsReturned > 0) {
+                caNumbers.Append(number);
+                _cache.Set("caNumbers", caNumbers);
+                return true;
+            }
+
+            return false;
+        } catch (Exception ex) {
+            _logger.LogError($"Unable to determine if {number} is a valid CA#, because {ex.Message}");
+            throw;
+        }
+    }
+}