access group for keychain. load sites for given hostname in extension

src/iOS.Extension/Models/SiteViewModel.cs

@@ -0,0 +1,44 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using Bit.App.Models;
+
+namespace Bit.iOS.Extension.Models
+{
+    public class SiteViewModel
+    {
+        public SiteViewModel(Site site)
+        {
+            Id = site.Id;
+            Name = site.Name?.Decrypt();
+            Username = site.Username?.Decrypt();
+            Password = site.Password?.Decrypt();
+            Uri = site.Uri?.Decrypt();
+        }
+
+        public string Id { get; set; }
+        public string Name { get; set; }
+        public string Username { get; set; }
+        public string Password { get; set; }
+        public string Uri { get; set; }
+        public string HostName
+        {
+            get
+            {
+                if(string.IsNullOrWhiteSpace(Uri))
+                {
+                    return null;
+                }
+
+                try
+                {
+                    return new Uri(Uri)?.Host;
+                }
+                catch
+                {
+                    return null;
+                };
+            }
+        }
+    }
+}