implement UpdateEvent

Related to: aliencube#203

Author: sikutisa

src/AzureOpenAIProxy.ApiApp/Repositories/AdminEventRepository.cs

@@ -1,7 +1,6 @@
 using Azure.Data.Tables;
 
 using AzureOpenAIProxy.ApiApp.Configurations;
-using AzureOpenAIProxy.ApiApp.Extensions;
 using AzureOpenAIProxy.ApiApp.Models;
 
 namespace AzureOpenAIProxy.ApiApp.Repositories;
@@ -65,18 +64,30 @@ public async Task<AdminEventDetails> GetEvent(Guid eventId)
     {
         TableClient tableClient = await GetTableClientAsync();
 
-        var eventDetail = await tableClient.GetEntityAsync<AdminEventDetails>(
-            rowKey: eventId.ToString(),
-            partitionKey: PartitionKeys.EventDetails
-        ).ConfigureAwait(false);
+        var eventDetails = await GetEventDetailsAsync(eventId, tableClient);
 
-        return eventDetail.Value;
+        return eventDetails;
     }
 
     /// <inheritdoc />
     public async Task<AdminEventDetails> UpdateEvent(Guid eventId, AdminEventDetails eventDetails)
     {
-        throw new NotImplementedException();
+        TableClient tableClient = await GetTableClientAsync();
+
+        var previousDetails = await GetEventDetailsAsync(eventId, tableClient);
+
+        await tableClient.UpdateEntityAsync<AdminEventDetails>(eventDetails, previousDetails.ETag);
+
+        return eventDetails;
+    }
+
+    private async Task<AdminEventDetails> GetEventDetailsAsync(Guid eventId, TableClient tableClient) {
+        var eventDetails = await tableClient.GetEntityAsync<AdminEventDetails>(
+            rowKey: eventId.ToString(),
+            partitionKey: PartitionKeys.EventDetails
+        ).ConfigureAwait(false);
+
+        return eventDetails.Value;
     }
 
     private async Task<TableClient> GetTableClientAsync()