Added support for per site options and OpenID Connect

Oqtane.Server/Infrastructure/Options/SiteOptionsCache.cs

@@ -0,0 +1,70 @@
+using System;
+using System.Collections.Concurrent;
+using Microsoft.Extensions.Options;
+using Oqtane.Models;
+
+namespace Oqtane.Infrastructure
+{
+    public class SiteOptionsCache<TOptions, TAlias> : IOptionsMonitorCache<TOptions>
+        where TOptions : class
+        where TAlias : class, IAlias, new()
+    {
+        private readonly IAliasAccessor _aliasAccessor;
+        private readonly ConcurrentDictionary<string, IOptionsMonitorCache<TOptions>> map = new ConcurrentDictionary<string, IOptionsMonitorCache<TOptions>>();
+
+        public SiteOptionsCache(IAliasAccessor aliasAccessor)
+        {
+            _aliasAccessor = aliasAccessor;
+        }
+
+        public void Clear()
+        {
+            var cache = map.GetOrAdd(GetKey(), new OptionsCache<TOptions>());
+            cache.Clear();
+        }
+
+        public void Clear(Alias alias)
+        {
+            var cache = map.GetOrAdd(alias.SiteKey, new OptionsCache<TOptions>());
+
+            cache.Clear();
+        }
+
+        public void ClearAll()
+        {
+            foreach (var cache in map.Values)
+            {
+                cache.Clear();
+            }
+        }
+
+        public TOptions GetOrAdd(string name, Func<TOptions> createOptions)
+        {
+            name = name ?? Options.DefaultName;
+            var cache = map.GetOrAdd(GetKey(), new OptionsCache<TOptions>());
+
+            return cache.GetOrAdd(name, createOptions);
+        }
+
+        public bool TryAdd(string name, TOptions options)
+        {
+            name = name ?? Options.DefaultName;
+            var cache = map.GetOrAdd(GetKey(), new OptionsCache<TOptions>());
+
+            return cache.TryAdd(name, options);
+        }
+
+        public bool TryRemove(string name)
+        {
+            name = name ?? Options.DefaultName;
+            var cache = map.GetOrAdd(GetKey(), new OptionsCache<TOptions>());
+
+            return cache.TryRemove(name);
+        }
+
+        private string GetKey()
+        {
+            return _aliasAccessor?.Alias?.SiteKey ?? "";
+        }
+    }
+}