extensibility enhancements for site templates

Oqtane.Server/Repository/SiteTemplateRepository.cs

@@ -0,0 +1,57 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using Microsoft.Extensions.DependencyInjection;
+using Oqtane.Infrastructure.Interfaces;
+using Oqtane.Models;
+
+namespace Oqtane.Repository
+{
+    public class SiteTemplateRepository : ISiteTemplateRepository
+    {
+        private readonly IServiceProvider _serviceProvider;
+
+        public SiteTemplateRepository(IServiceProvider serviceProvider)
+        {
+            _serviceProvider = serviceProvider;
+        }
+
+        private List<SiteTemplate> LoadSiteTemplates()
+        {
+            List<SiteTemplate> siteTemplates = new List<SiteTemplate>();
+
+            // iterate through Oqtane site template assemblies
+            Assembly[] assemblies = AppDomain.CurrentDomain.GetAssemblies()
+                .Where(item => item.FullName.StartsWith("Oqtane.") || item.FullName.Contains(".SiteTemplate.")).ToArray();
+            foreach (Assembly assembly in assemblies)
+            {
+                siteTemplates = LoadSiteTemplatesFromAssembly(siteTemplates, assembly);
+            }
+
+            return siteTemplates;
+        }
+
+        private List<SiteTemplate> LoadSiteTemplatesFromAssembly(List<SiteTemplate> siteTemplates, Assembly assembly)
+        {
+            SiteTemplate siteTemplate;
+            Type[] siteTemplateTypes = assembly.GetTypes().Where(item => item.GetInterfaces().Contains(typeof(ISiteTemplate))).ToArray();
+            foreach (Type siteTemplateType in siteTemplateTypes)
+            {
+                var siteTemplateObject = ActivatorUtilities.CreateInstance(_serviceProvider, siteTemplateType);
+                siteTemplate = new SiteTemplate
+                {
+                    Name = (string)siteTemplateType.GetProperty("Name").GetValue(siteTemplateObject),
+                    TypeName = siteTemplateType.AssemblyQualifiedName
+                };
+                siteTemplates.Add(siteTemplate);
+            }
+            return siteTemplates;
+        }
+
+        public IEnumerable<SiteTemplate> GetSiteTemplates()
+        {
+            return LoadSiteTemplates();
+        }
+    }
+}