MRB webassembly

MesaFabApproval.Client/Services/ECNService.cs

@@ -0,0 +1,52 @@
+using System.Text.Json;
+
+namespace MesaFabApproval.Client.Services;
+
+public interface IECNService {
+    Task<string> ECNNumberIsValidStr(int ecnNumber);
+    Task<bool> ECNNumberIsValid(int number);
+}
+
+public class ECNService : IECNService {
+    private readonly IHttpClientFactory _httpClientFactory;
+
+    public ECNService(IHttpClientFactory httpClientFactory) {
+        _httpClientFactory = httpClientFactory ??
+            throw new ArgumentNullException("IHttpClientFactory not injected");
+    }
+
+    public async Task<string> ECNNumberIsValidStr(int ecnNumber) {
+        if (ecnNumber <= 0 || !await ECNNumberIsValid(ecnNumber))
+            return $"{ecnNumber} is not a valid ECN#";
+
+        return null;
+    }
+
+    public async Task<bool> ECNNumberIsValid(int number) {
+        if (number <= 0) return false;
+
+        try {
+            HttpClient httpClient = _httpClientFactory.CreateClient("API");
+
+            HttpRequestMessage requestMessage = new(HttpMethod.Get, $"ecn/isValidEcnNumber?number={number}");
+
+            HttpResponseMessage responseMessage = await httpClient.SendAsync(requestMessage);
+
+            if (responseMessage.IsSuccessStatusCode) {
+                string responseContent = await responseMessage.Content.ReadAsStringAsync();
+
+                JsonSerializerOptions jsonSerializerOptions = new() {
+                    PropertyNameCaseInsensitive = true
+                };
+
+                bool isValid = JsonSerializer.Deserialize<bool>(responseContent, jsonSerializerOptions);
+
+                return isValid;
+            } else {
+                throw new Exception(responseMessage.ReasonPhrase);
+            }
+        } catch (Exception ex) {
+            throw new Exception($"Unable to determine if {number} is a valid ECN#, because {ex.Message}");
+        }
+    }
+}