feat: add support for Int32

README.md

@@ -22,6 +22,7 @@ If a claim with the given name is found the modelbinder will try to convert the
 - `string`
 - `Guid`
 - `Enum`
+- `int`
 
 **Note:** Which claims exist in the User object is dependent on your authentication middleware and out of the scope of this repository. For example you can extend the `AuthenticationHandler` like described in [the official docs](https://docs.microsoft.com/en-us/aspnet/core/security/authentication/?view=aspnetcore-7.0#authentication-handler) and add custom claims to the user.
 

src/DroidSolutions.Oss.AuthClaimBinder/ClaimModelBinder.cs

@@ -1,3 +1,4 @@
+using System.Globalization;
 using System.Security.Claims;
 
 using DroidSolutions.Oss.AuthClaimBinder.Exceptions;
@@ -72,6 +73,24 @@ public Task BindModelAsync(ModelBindingContext bindingContext)
 
       bindingContext.Result = ModelBindingResult.Success(value);
     }
+    else if (bindingContext.ModelType == typeof(int))
+    {
+      try
+      {
+        bindingContext.Result = ModelBindingResult.Success(int.Parse(claim.Value, CultureInfo.InvariantCulture));
+      }
+      catch (Exception ex)
+      {
+        bindingContext.Result = ModelBindingResult.Failed();
+        _logger.LogError(ex, "The claim {FieldName} could not be parsed to an Int32!", bindingContext.FieldName);
+
+        throw new ClaimParsingException(
+          $"The claim {bindingContext.FieldName} could not be parsed to an Int32!",
+          ex,
+          bindingContext.FieldName,
+          bindingContext.ModelType);
+      }
+    }
     else
     {
       bindingContext.Result = ModelBindingResult.Success(claim.Value);

test/DroidSolutions.Oss.AuthClaimBinderTest/ClaimModelBinderTests.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Globalization;
 using System.Security.Claims;
 using System.Threading.Tasks;
 
@@ -220,4 +221,47 @@ public async Task BindingModelAsync_ShouldThrowInvalidOperationException_WhenEnu
 
     await Assert.ThrowsAsync<ClaimParsingException>(() => claimModelBinder.BindModelAsync(bindingContext.Object));
   }
+
+  [Fact]
+  public async Task BindingModelAsync_ShouldBeAbleToParseInts()
+  {
+    int num = 42;
+    Claim[] claims = [new Claim("someId", num.ToString(CultureInfo.InvariantCulture))];
+    ClaimsIdentity identity = new (claims, "Scheme");
+    ClaimsPrincipal principal = new(identity);
+
+    Mock<HttpContext> httpContext = new();
+    httpContext.Setup(hc => hc.User).Returns(principal);
+
+    Mock<DefaultModelBindingContext> bindingContext = new() { CallBase = true };
+    bindingContext.Setup(bc => bc.HttpContext).Returns(httpContext.Object);
+    bindingContext.Setup(bc => bc.FieldName).Returns("someId");
+    bindingContext.Setup(bc => bc.ModelType).Returns(typeof(int));
+
+    ClaimModelBinder claimModelBinder = new(_logMock.Object, null);
+
+    await claimModelBinder.BindModelAsync(bindingContext.Object);
+
+    Assert.Equal(num, bindingContext.Object.Result.Model);
+  }
+
+  [Fact]
+  public async Task BindingModelAsync_ShouldThrowInvalidOperationException_WhenIntIsNotParsable()
+  {
+    Claim[] claims = [new Claim("someId", "42,5d")];
+    ClaimsIdentity identity = new(claims, "Scheme");
+    ClaimsPrincipal principal = new(identity);
+
+    Mock<HttpContext> httpContext = new();
+    httpContext.Setup(hc => hc.User).Returns(principal);
+
+    Mock<DefaultModelBindingContext> bindingContext = new() { CallBase = true };
+    bindingContext.Setup(bc => bc.HttpContext).Returns(httpContext.Object);
+    bindingContext.Setup(bc => bc.FieldName).Returns("someId");
+    bindingContext.Setup(bc => bc.ModelType).Returns(typeof(int));
+
+    ClaimModelBinder claimModelBinder = new(_logMock.Object, null);
+
+    await Assert.ThrowsAsync<ClaimParsingException>(() => claimModelBinder.BindModelAsync(bindingContext.Object));
+  }
 }