remove automapper and create resource mapper generic interface. kept it untyped for now to match how automapper works

Author: roblankey

src/JsonApiDotNetCore/JsonApiDotNetCore.csproj

@@ -21,7 +21,6 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="AutoMapper.Extensions.Microsoft.DependencyInjection" Version="4.0.1" />
     <PackageReference Include="Ben.Demystifier" Version="0.1.1" />
     <PackageReference Include="Microsoft.AspNetCore.Routing" Version="$(AspNetCoreVersion)" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Core" Version="$(AspNetCoreVersion)" />

src/JsonApiDotNetCore/Models/IResourceMapper.cs

@@ -0,0 +1,23 @@
+namespace JsonApiDotNetCore.Models
+{
+    public interface IResourceMapper
+    {
+        /// <summary>
+        /// Execute a mapping from the source object to a new destination object.
+        /// The source type is inferred from the source object.
+        /// </summary>
+        /// <typeparam name="TDestination">Destination type to create</typeparam>
+        /// <param name="source">Source object to map from</param>
+        /// <returns>Mapped destination object</returns>
+        TDestination Map<TDestination>(object source);
+
+        /// <summary>
+        /// Execute a mapping from the source object to a new destination object.
+        /// </summary>
+        /// <typeparam name="TSource">Source type to use, regardless of the runtime type</typeparam>
+        /// <typeparam name="TDestination">Destination type to create</typeparam>
+        /// <param name="source">Source object to map from</param>
+        /// <returns>Mapped destination object</returns>
+        TDestination Map<TSource, TDestination>(TSource source);
+    }
+}

src/JsonApiDotNetCore/Services/DefaultResourceService.cs

@@ -1,4 +1,3 @@
-using AutoMapper;
 using JsonApiDotNetCore.Data;
 using JsonApiDotNetCore.Internal;
 using JsonApiDotNetCore.Models;
@@ -42,7 +41,7 @@ public class DefaultResourceService<TResource, TEntity, TId> :
         private readonly IJsonApiContext _jsonApiContext;
         private readonly IEntityRepository<TEntity, TId> _entities;
         private readonly ILogger _logger;
-        private readonly IMapper _mapper;
+        private readonly IResourceMapper _mapper;
 
         public DefaultResourceService(
                 IJsonApiContext jsonApiContext,
@@ -65,7 +64,7 @@ public DefaultResourceService(
                 IJsonApiContext jsonApiContext,
                 IEntityRepository<TEntity, TId> entityRepository,
                 ILoggerFactory loggerFactory,
-                IMapper mapper)
+                IResourceMapper mapper)
         {
             _jsonApiContext = jsonApiContext;
             _entities = entityRepository;