Saving AdminSettings to a Json File.

Server/Migrations/01000000_InitializeModule.cs

@@ -4,7 +4,6 @@ using Oqtane.Databases.Interfaces;
 using Oqtane.Migrations;
 using SZUAbsolventenverein.Module.AdminModules.Migrations.EntityBuilders;
 using SZUAbsolventenverein.Module.AdminModules.Repository;
-using SZUAbsolventenverein.Module.AdminModules.Server.Migrations.EntityBuilders;
 
 namespace SZUAbsolventenverein.Module.AdminModules.Migrations
 {
@@ -20,19 +19,12 @@ namespace SZUAbsolventenverein.Module.AdminModules.Migrations
         {
             var massMailingTemplateEntityBuilder = new MassMailingTemplateEntityBuilder(migrationBuilder, ActiveDatabase);
             massMailingTemplateEntityBuilder.Create();
-            var adminSettingsEntityBuilder = new AdminSettingsEntityBuilder(migrationBuilder, ActiveDatabase);
-            adminSettingsEntityBuilder.Create();
-
-            // Eine AdminSettings Zeile erstellen, damit die Werte nachher bearbeitet werden k<>nnen.
-            migrationBuilder.Sql("INSERT INTO SZUAbsolventenvereinAdminSettings VALUES (1, 1, 'host', time('now'), 'host', time('now'))");
         }
 
         protected override void Down(MigrationBuilder migrationBuilder)
         {
             var entityBuilder = new MassMailingTemplateEntityBuilder(migrationBuilder, ActiveDatabase);
             entityBuilder.Drop();
-            var adminSettingsEntityBuilder = new AdminSettingsEntityBuilder(migrationBuilder, ActiveDatabase);
-            adminSettingsEntityBuilder.Drop();
         }
     }
 }

Server/Migrations/EntityBuilders/AdminSettingsEntityBuilder.cs

@@ -1,34 +0,0 @@
-using Microsoft.EntityFrameworkCore.Migrations;
-using Microsoft.EntityFrameworkCore.Migrations.Operations;
-using Microsoft.EntityFrameworkCore.Migrations.Operations.Builders;
-using Oqtane.Databases.Interfaces;
-using Oqtane.Migrations;
-using Oqtane.Migrations.EntityBuilders;
-using SZUAbsolventenverein.Module.AdminModules.Migrations.EntityBuilders;
-
-namespace SZUAbsolventenverein.Module.AdminModules.Server.Migrations.EntityBuilders
-{
-    public class AdminSettingsEntityBuilder : AuditableBaseEntityBuilder<AdminSettingsEntityBuilder>
-    {
-
-        private const string _entityTableName = "SZUAbsolventenvereinAdminSettings";
-        private readonly PrimaryKey<AdminSettingsEntityBuilder> _primaryKey = new("PK_SZUAbsolventenvereinAdminSettings", x => x.AdminSettingsId);
-
-        public AdminSettingsEntityBuilder(MigrationBuilder migrationBuilder, IDatabase database) : base(migrationBuilder, database)
-        {
-            EntityTableName = _entityTableName;
-            PrimaryKey = _primaryKey;
-        }
-
-        protected override AdminSettingsEntityBuilder BuildTable(ColumnsBuilder table)
-        {
-            AdminSettingsId = AddAutoIncrementColumn(table, "AdminSettingsId");
-            TokenLifetime = AddIntegerColumn(table, "TokenLifetime");
-            AddAuditableColumns(table);
-            return this;
-        }
-
-        public OperationBuilder<AddColumnOperation> AdminSettingsId { get; set; }
-        public OperationBuilder<AddColumnOperation> TokenLifetime { get; set; }
-    }
-}

Server/Repository/AdminModulesContext.cs

@@ -10,7 +10,6 @@ namespace SZUAbsolventenverein.Module.AdminModules.Repository
     public class AdminModulesContext : DBContextBase, ITransientService, IMultiDatabase
     {
         public virtual DbSet<Models.AdminModules> AdminModules { get; set; }
-        public virtual DbSet<Models.AdminSetting> AdminSettings { get; set; }
 
         public AdminModulesContext(IDBContextDependencies DBContextDependencies) : base(DBContextDependencies)
         {
@@ -22,7 +21,6 @@ namespace SZUAbsolventenverein.Module.AdminModules.Repository
             base.OnModelCreating(builder);
 
             builder.Entity<Models.AdminModules>().ToTable(ActiveDatabase.RewriteName("SZUAbsolventenvereinAdminModules"));
-            builder.Entity<Models.AdminSetting>().ToTable(ActiveDatabase.RewriteName("SZUAbsolventenvereinAdminSettings"));
         }
     }
 }

Server/Repository/AdminSettingsRepository.cs

@@ -1,6 +1,9 @@
 using Microsoft.EntityFrameworkCore;
 using System.Linq;
 using System.Collections.Generic;
+using System.IO;
+using System.Runtime.CompilerServices;
+using System.Text.Json;
 using SZUAbsolventenverein.Module.AdminModules.Models;
 using Oqtane.Modules;
 
@@ -31,25 +34,58 @@ namespace SZUAbsolventenverein.Module.AdminModules.Repository
     /// </summary>
     public class AdminSettingsRepository : IAdminSettingsRepository, ITransientService
     {
-        private readonly IDbContextFactory<AdminModulesContext> _factory;
+        public AdminSettingsRepository()
-
-        public AdminSettingsRepository(IDbContextFactory<AdminModulesContext> factory)
         {
-            _factory = factory;
         }
 
         public AdminSetting GetAdminSetting()
         {
-            using var db = _factory.CreateDbContext();
+            return AdminSettingsExtensions.LoadSettings();
-            return db.AdminSettings.First();
         }
 
         public AdminSetting SetAdminSettings(AdminSetting adminSetting)
         {
-            using var db = _factory.CreateDbContext();
+            return adminSetting.SaveChanges();
-            db.Entry(adminSetting).State = EntityState.Modified;
+        }
-            db.SaveChanges();
+    }
+    
+    /// <summary>
+    /// Extension methods for saving and loading admin settings to/from a JSON file.
+    /// </summary>
+    public static class AdminSettingsExtensions
+    {
+        /// <summary>
+        /// Path to the JSON file where admin settings are stored.
+        /// </summary>
+        private static string path = "AdminSettings.json";
+        
+        /// <summary>
+        /// Saves the adminSettingsObject to a JSON file.
+        /// </summary>
+        /// <param name="adminSetting">Settings to save</param>
+        /// <returns>The same AdminSettings object for chaining of Operations</returns>
+        public static AdminSetting SaveChanges(this AdminSetting adminSetting)
+        {
+            string res = JsonSerializer.Serialize(adminSetting);
+
+            File.WriteAllText(path, res);
+            
             return adminSetting;
         }
+        
+        /// <summary>
+        /// Loads the admin settings from the JSON file. If the file does not exist, returns a new AdminSetting object with default (0) values.
+        /// </summary>
+        /// <returns></returns>
+        public static AdminSetting LoadSettings()
+        {
+            if (File.Exists(path))
+            {
+                string json = File.ReadAllText(path);
+                return JsonSerializer.Deserialize<AdminSetting>(json);
+            }
+            
+            return new AdminSetting();
+        }
     }
 }

Server/Startup/ConfigureDataProtectionTokenProviderOptions.cs

@@ -1,50 +0,0 @@
-using Microsoft.AspNetCore.Identity;
-using Microsoft.Extensions.Options;
-using System;
-using System.Linq;
-using Microsoft.EntityFrameworkCore;
-using Microsoft.Extensions.DependencyInjection;
-using SZUAbsolventenverein.Module.AdminModules.Models;
-using SZUAbsolventenverein.Module.AdminModules.Repository;
-
-namespace SZUAbsolventenverein.Module.AdminModules.Server.Startup
-{
-    public class ConfigureDataProtectionTokenProviderOptions : IConfigureOptions<DataProtectionTokenProviderOptions>
-    {
-        private readonly IServiceProvider _serviceProvider;
-
-        public ConfigureDataProtectionTokenProviderOptions(IServiceProvider serviceProvider)
-        {
-            _serviceProvider = serviceProvider;
-            Console.WriteLine("Instatiating DPTPO Configurator");
-        }
-
-        public void Configure(DataProtectionTokenProviderOptions options)
-        {
-            Console.WriteLine("Configuring DPTPO");
-            // default fallback
-            options.TokenLifespan = TimeSpan.FromHours(2);
-    
-            try
-            {
-                using var scope = _serviceProvider.CreateScope();
-                var _dbContextFactory = scope.ServiceProvider.GetRequiredService<IDbContextFactory<AdminModulesContext>>();
-                var _ctx = _dbContextFactory.CreateDbContext();
-                AdminSetting adminSetting = _ctx.AdminSettings.First();
-                
-                Console.WriteLine("Setting DPTPO: " + adminSetting);
-                if (adminSetting != null)
-                {
-                    Console.WriteLine("Setting DPTPO: " + adminSetting.TokenLifetime);
-                    options.TokenLifespan = TimeSpan.FromDays(adminSetting.TokenLifetime);
-                }
-            }
-            catch (Exception ex)
-            {
-                Console.WriteLine("DB Not ready, using default DPTPO: " + ex);
-                // DB not ready / read failed — keep default
-                // Unable to get Create DB Context because Oqtane's Database Setup is incomplete.
-            }
-        }
-    }
-}

Server/Startup/ServerStartup.cs

@@ -1,14 +1,11 @@
 using Microsoft.AspNetCore.Builder; 
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.Identity;
-using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.DependencyInjection;
-using Microsoft.Extensions.Options;
 using Oqtane.Infrastructure;
 using System;
 using SZUAbsolventenverein.Module.AdminModules.Models;
 using SZUAbsolventenverein.Module.AdminModules.Repository;
-using SZUAbsolventenverein.Module.AdminModules.Server.Startup;
 using SZUAbsolventenverein.Module.AdminModules.Services;
 using SZUAbsolventenverein.Module.AdminSettings.Services;
 
@@ -30,10 +27,27 @@ namespace SZUAbsolventenverein.Module.AdminModules.Startup
         {
             services.AddTransient<IAdminModulesService, ServerAdminModulesService>();
             services.AddTransient<IAdminSettingsService, ServerAdminSettingsService>();
+            services.AddTransient<IAdminSettingsRepository, AdminSettingsRepository>();
             services.AddDbContextFactory<AdminModulesContext>(opt => { }, ServiceLifetime.Transient);
 
-            services.AddTransient<IConfigureOptions<DataProtectionTokenProviderOptions>,
+            services.Configure<DataProtectionTokenProviderOptions>(options =>
-                    ConfigureDataProtectionTokenProviderOptions>();
+            {
+                options.TokenLifespan = TimeSpan.FromDays(2);
+            });
+
+            try
+            {
+                AdminSetting settings = AdminSettingsExtensions.LoadSettings();
+                services.Configure<DataProtectionTokenProviderOptions>(options =>
+                {
+                    options.TokenLifespan = TimeSpan.FromDays(settings.TokenLifetime);
+                });
+                Console.WriteLine("Saving token lifetime: " + settings.TokenLifetime + " days");
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine(ex);
+            }
         }
     }
 }