Support for init config from assembly by typed class configuration

src/SimplePatch.Tests/ConfigurationTests/Globals.cs

@@ -27,6 +27,19 @@ public void IgnoreLetterCase()
             Assert.AreEqual(23, John.Age);
         }
 
+        [TestMethod]
+        public void ConfigFromAssembly()
+        {
+
+            var assembly = typeof(Person).Assembly;
+            DeltaConfig.InitFromAssembly(cfg => {
+                cfg.AddAssembly(assembly);
+            });
+            CreateDelta<Person>("Age", 23).Patch(John);
+            Assert.AreEqual(23, John.Age);
+
+        }
+
         [TestMethod]
         public void MappingFunction()
         {

src/SimplePatch.Tests/ConfigurationTests/Properties.cs

@@ -32,6 +32,39 @@ public void Exclude()
             Assert.AreEqual(initialAge, John.Age);
         }
 
+        [TestMethod]
+        public void ExcludedByAttribute()
+        {
+            DeltaConfig.Init(cfg =>
+            {
+                cfg
+                .AddEntity<Person>();
+            });
+
+            var initialAge = John.AgeExcludeByAttibute;
+
+            CreateDelta<Person, int>(x => x.AgeExcludeByAttibute, 23).Patch(John);
+
+            Assert.AreEqual(initialAge, John.AgeExcludeByAttibute);
+        }
+
+        [TestMethod]
+        public void ExcludedByMapping()
+        {
+            var assembly = typeof(Person).Assembly;
+            DeltaConfig.InitFromAssembly(cfg =>
+            {
+                cfg
+                .AddAssembly(assembly);
+            });
+
+            var initialAge = John.AgeExcludeByAttibute;
+
+            CreateDelta<Person, int>(x => x.AgeExcludeByMapping, 23).Patch(John);
+
+            Assert.AreEqual(initialAge, John.AgeExcludeByAttibute);
+        }
+
         [TestMethod]
         public void IgnoreNullValue()
         {

src/SimplePatch.Tests/Person.cs

@@ -1,4 +1,5 @@
 using System;
+using SimplePatch.Attributes;
 
 namespace SimplePatch.Tests
 {
@@ -7,6 +8,9 @@ internal class Person
         public string Name { get; set; }
         public string Surname { get; set; }
         public int Age { get; set; }
+        [Exclude]
+        public int AgeExcludeByAttibute { get; set; }
+        public int AgeExcludeByMapping { get; set; }
         public double Height { get; set; }
         public Guid Guid { get; set; }
         public DateTime BirthDate { get; set; }
@@ -23,4 +27,13 @@ internal enum Cool
     {
         Awesome, NotReally
     }
+
+    internal class PersonConfiguration : Mapping.IEntityTypeConfiguration<Person>
+    {
+        public void Configuration(DeltaConfig.EntityConfig<Person> entityConfig)
+        {
+            entityConfig.Property(x => x.AgeExcludeByMapping).Exclude();
+        }
+    }
+
 }

src/SimplePatch.Tests/TestBase.cs

@@ -16,6 +16,7 @@ public void TestInit()
                 Name = "John",
                 Surname = "Doe",
                 Age = 22,
+                AgeExcludeByAttibute = 22,
                 Height = 1.7,
                 BirthDate = new DateTime(1990, 2, 1, 20, 15, 10)
             };

src/SimplePatch/Attributes/ExcludeAttribute.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SimplePatch.Attributes
+{
+    public class ExcludeAttribute : Attribute
+    {
+    }
+}

src/SimplePatch/Delta.cs

@@ -1,4 +1,5 @@
-using SimplePatch.Helpers;
+using SimplePatch.Attributes;
+using SimplePatch.Helpers;
 using SimplePatch.Mapping;
 using System;
 using System.Collections;
@@ -194,7 +195,7 @@ private TEntity SetPropertiesValue(TEntity entity)
             foreach (var prop in entityProperties)
             {
                 var propertyInfo = prop.PropertyInfo;
-                if (ContainsKey(propertyInfo.Name) && !prop.Excluded)
+                if (ContainsKey(propertyInfo.Name) && !prop.Excluded && !ExcludedByAttribute(propertyInfo))
                 {
                     var truePropertyType = TypeHelper.GetTrueType(propertyInfo.PropertyType);
                     var newPropertyValue = this[propertyInfo.Name];
@@ -340,6 +341,10 @@ public bool ContainsKey(string key)
         {
             return dict.ContainsKey(key);
         }
+        public bool ExcludedByAttribute(PropertyInfo propertyInfo)
+        {
+            return propertyInfo.GetCustomAttribute(typeof(ExcludeAttribute)) != null;
+        }
 
         public bool Remove(string key)
         {

src/SimplePatch/DeltaConfig.cs

@@ -2,7 +2,9 @@
 using SimplePatch.Mapping;
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using System.Linq.Expressions;
+using System.Reflection;
 
 namespace SimplePatch
 {
@@ -20,69 +22,74 @@ public static void Init(Action<Config> config)
             config(new Config());
         }
 
+        public static void InitFromAssembly(Action<ConfigFromAssembly> config) {
+            config(new ConfigFromAssembly());
+        }
+
         internal static void Clean()
         {
             IgnoreLetterCase = false;
             GlobalMappings?.Clear();
             DeltaCache.Clear();
         }
 
-        public sealed class Config
+        public sealed class EntityConfig<T> where T : class, new()
         {
-            public sealed class EntityConfig<T> where T : class, new()
+            public PropertyConfig<T, TProp> Property<TProp>(Expression<Func<T, TProp>> property)
             {
-                public PropertyConfig<T, TProp> Property<TProp>(Expression<Func<T, TProp>> property)
-                {
-                    return new PropertyConfig<T, TProp>(property);
-                }
+                return new PropertyConfig<T, TProp>(property);
             }
+        }
 
-            public sealed class PropertyConfig<TEntity, TProp> where TEntity : class, new()
-            {
-                private readonly string propertyName;
-                private readonly DeltaCache.PropertyEditor<TEntity, TProp> deltaCachePropertyEditor;
+        public sealed class PropertyConfig<TEntity, TProp> where TEntity : class, new()
+        {
+            private readonly string propertyName;
+            private readonly DeltaCache.PropertyEditor<TEntity, TProp> deltaCachePropertyEditor;
 
-                public PropertyConfig(Expression<Func<TEntity, TProp>> property)
-                {
-                    propertyName = ExpressionHelper.GetPropertyName(property);
-                    deltaCachePropertyEditor = new DeltaCache.PropertyEditor<TEntity, TProp>(propertyName);
-                }
+            public PropertyConfig(Expression<Func<TEntity, TProp>> property)
+            {
+                propertyName = ExpressionHelper.GetPropertyName(property);
+                deltaCachePropertyEditor = new DeltaCache.PropertyEditor<TEntity, TProp>(propertyName);
+            }
 
-                /// <summary>
-                /// Adds a mapping function for the specified property of the specified entity.
-                /// </summary>
-                /// <typeparam name="TProp">Type of the property</typeparam>
-                /// <param name="property">Expression which indicates the property</param>
-                /// <param name="mapFunction">Mapping function used to evaluate the value to be assigned to the property</param>
-                /// <returns></returns>
-                public PropertyConfig<TEntity, TProp> AddMapping(MapDelegate<TProp> mapFunction)
-                {
-                    deltaCachePropertyEditor.AddMapping(mapFunction);
-                    return this;
-                }
+            /// <summary>
+            /// Adds a mapping function for the specified property of the specified entity.
+            /// </summary>
+            /// <typeparam name="TProp">Type of the property</typeparam>
+            /// <param name="property">Expression which indicates the property</param>
+            /// <param name="mapFunction">Mapping function used to evaluate the value to be assigned to the property</param>
+            /// <returns></returns>
+            public PropertyConfig<TEntity, TProp> AddMapping(MapDelegate<TProp> mapFunction)
+            {
+                deltaCachePropertyEditor.AddMapping(mapFunction);
+                return this;
+            }
 
-                /// <summary>
-                /// Ignore null value for the specified property
-                /// </summary>
-                /// <returns></returns>
-                public PropertyConfig<TEntity, TProp> IgnoreNull()
-                {
-                    deltaCachePropertyEditor.IgnoreNullValue();
-                    return this;
-                }
+            /// <summary>
+            /// Ignore null value for the specified property
+            /// </summary>
+            /// <returns></returns>
+            public PropertyConfig<TEntity, TProp> IgnoreNull()
+            {
+                deltaCachePropertyEditor.IgnoreNullValue();
+                return this;
+            }
 
-                /// <summary>
-                /// Marks the specified property as excluded when calling <see cref="Delta{TEntity}.Patch(TEntity)"/>.
-                /// </summary>
-                /// <typeparam name="T"></typeparam>
-                /// <param name="properties"></param>
-                /// <returns></returns>
-                public PropertyConfig<TEntity, TProp> Exclude()
-                {
-                    deltaCachePropertyEditor.Exclude();
-                    return this;
-                }
+            /// <summary>
+            /// Marks the specified property as excluded when calling <see cref="Delta{TEntity}.Patch(TEntity)"/>.
+            /// </summary>
+            /// <typeparam name="T"></typeparam>
+            /// <param name="properties"></param>
+            /// <returns></returns>
+            public PropertyConfig<TEntity, TProp> Exclude()
+            {
+                deltaCachePropertyEditor.Exclude();
+                return this;
             }
+        }
+
+        public sealed class Config
+        {
 
             /// <summary>
             /// Allows to add settings for the specified property
@@ -119,5 +126,37 @@ public Config AddMapping(MapDelegate<object> mappingFunc)
                 return this;
             }
         }
+
+        public sealed class ConfigFromAssembly
+        {
+            private Config config;
+            public ConfigFromAssembly() {
+                this.config = new Config();
+            }
+            public ConfigFromAssembly AddAssembly(Assembly assembly) {
+
+                var types = assembly.GetTypes();
+                foreach (var type in types)
+                {
+                    var interfaces = type.GetInterfaces();
+                    var implementedInterface = interfaces.Where(x => x.IsConstructedGenericType &&  x.GetGenericTypeDefinition() == typeof(IEntityTypeConfiguration<>)).FirstOrDefault();
+                    if (implementedInterface != null) {
+                        //add entity
+                        var methodDef = typeof(Config).GetMethod("AddEntity");
+                        var method = methodDef.MakeGenericMethod(new Type[] { implementedInterface.GetGenericArguments()[0] });
+                        var entityConfig = method.Invoke(config, new object[] { });
+                        //run config from entity
+                        var obj = Activator.CreateInstance(type);
+                        var configurationMethodDef = type.GetMethod("Configuration");
+                        configurationMethodDef.Invoke(obj, new object[] { entityConfig });
+
+                    }
+                }
+                return this;
+            }
+        }
+
+
+
     }
 }

src/SimplePatch/Mapping/IEntityTypeConfiguration.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SimplePatch.Mapping
+{
+    public interface IEntityTypeConfiguration<TEntity> where TEntity : class, new()
+    {
+        void Configuration(DeltaConfig.EntityConfig<TEntity> entityConfig);
+    }
+}

src/SimplePatch/SimplePatch.csproj

@@ -30,4 +30,8 @@
     <PackageReference Include="System.Reflection.TypeExtensions" Version="4.5.1" />
   </ItemGroup>
 
+  <ItemGroup>
+    <Folder Include="Attributes\" />
+  </ItemGroup>
+
 </Project>