Created CA follow up worker

FabApprovalWorkerService/Services/ECNService.cs

@@ -6,9 +6,10 @@ namespace FabApprovalWorkerService.Services;
 
 public interface IECNService {
     Task<IEnumerable<ECN>> GetExpiringTECNs();
-    Task<IEnumerable<ECN>> GetExpiredTECNs();
+    Task<IEnumerable<ECN>> GetExpiredTECNsInPastDay();
     Task<IEnumerable<string>> GetTECNNotificationUserEmails();
     Task<ECN> GetEcnByNumber(int ecnNumber);
+    bool EcnIsExpired(ECN ecn);
 }
 
 public class ECNService : IECNService {
@@ -20,6 +21,31 @@ public class ECNService : IECNService {
         _dalService = dalService ?? throw new ArgumentNullException("IDalService not injected");
     }
 
+    public bool EcnIsExpired(ECN ecn) {
+        try {
+            _logger.LogInformation("Attempting to determine if ECN is expired");
+
+            if (ecn is null) throw new ArgumentNullException("ECN cannot be null");
+
+            if (!ecn.IsTECN) return false;
+            if (ecn.CloseDate <= DateTime.Now) return false;
+
+            DateTime tomorrow = DateTime.Now.Date.AddDays(1);
+
+            bool isExpired = (ecn.ExpirationDate < tomorrow) && (ecn.ExtensionDate < tomorrow);
+
+            _logger.LogInformation($"ECN {ecn.ECNNumber} expired: {isExpired}");
+
+            return isExpired;
+        } catch (Exception ex) {
+            StringBuilder errMsgBuilder = new();
+            errMsgBuilder.Append($"An exception occurred when attempting to determine if ECN is expired. ");
+            errMsgBuilder.Append($"Exception: {ex.Message}");
+            _logger.LogError(errMsgBuilder.ToString());
+            throw;
+        }
+    }
+
     public async Task<ECN> GetEcnByNumber(int ecnNumber) {
         try {
             _logger.LogInformation($"Attempting to get ECN {ecnNumber}");
@@ -42,7 +68,7 @@ public class ECNService : IECNService {
         }
     }
 
-    public async Task<IEnumerable<ECN>> GetExpiredTECNs() {
+    public async Task<IEnumerable<ECN>> GetExpiredTECNsInPastDay() {
         try {
             _logger.LogInformation("Attempting to get all TECNs expired in the last day");