added API Management for managing site level entity permissions

Oqtane.Client/Services/ApiService.cs

@@ -0,0 +1,32 @@
+using System.Net.Http;
+using System.Threading.Tasks;
+using System.Collections.Generic;
+using Oqtane.Documentation;
+using Oqtane.Shared;
+using Oqtane.Models;
+
+namespace Oqtane.Services
+{
+    [PrivateApi("Don't show in the documentation, as everything should use the Interface")]
+    public class ApiService : ServiceBase, IApiService
+    {
+        public ApiService(HttpClient http, SiteState siteState) : base(http, siteState) { }
+
+        private string Apiurl => CreateApiUrl("Api");
+
+        public async Task<List<Api>> GetApisAsync(int siteId)
+        {
+            return await GetJsonAsync<List<Api>>($"{Apiurl}?siteid={siteId}");
+        }
+
+        public async Task<Api> GetApiAsync(int siteId, string entityName)
+        {
+            return await GetJsonAsync<Api>($"{Apiurl}/{siteId}/{entityName}");
+        }
+
+        public async Task UpdateApiAsync(Api api)
+        {
+            await PostJsonAsync(Apiurl, api);
+        }
+    }
+}