feat: add recaptcha validation to contact form

OliverBooth/Controllers/ContactController.cs

@@ -39,6 +39,13 @@ public class ContactController : Controller
             return RedirectToPage("/Contact/Index");
         }
 
+        if (!ModelState.IsValid)
+        {
+            _logger.LogError("Captcha validation failed");
+            TempData["Success"] = false;
+            return RedirectToPage("/Contact/Result");
+        }
+
         IFormCollection form = Request.Form;
         StringValues name = form["name"];
         StringValues email = form["email"];

OliverBooth/OliverBooth.csproj

@@ -9,6 +9,7 @@
 
     <ItemGroup>
         <PackageReference Include="Alexinea.Extensions.Configuration.Toml" Version="7.0.0"/>
+        <PackageReference Include="AspNetCore.ReCaptcha" Version="1.7.0" />
         <PackageReference Include="BCrypt.Net-Core" Version="1.6.0"/>
         <PackageReference Include="Humanizer.Core" Version="2.14.1"/>
         <PackageReference Include="MailKit" Version="4.1.0"/>

OliverBooth/Pages/Contact/Index.cshtml

@@ -33,5 +33,7 @@
         <textarea class="form-control" id="message" name="message" rows="5" required placeholder="What's on your mind?"></textarea>
     </div>
 
+    <recaptcha/>
+
     <button class="btn btn-primary" style="margin-top: 10px;">Submit</button>
 </form>

OliverBooth/Program.cs

@@ -1,3 +1,4 @@
+using AspNetCore.ReCaptcha;
 using Markdig;
 using OliverBooth.Data.Blog;
 using OliverBooth.Data.Web;
@@ -38,6 +39,7 @@ builder.Services.AddSingleton<IProjectService, ProjectService>();
 builder.Services.AddRazorPages().AddRazorRuntimeCompilation();
 builder.Services.AddControllersWithViews();
 builder.Services.AddRouting(options => options.LowercaseUrls = true);
+builder.Services.AddReCaptcha(builder.Configuration.GetSection("ReCaptcha"));
 
 if (builder.Environment.IsProduction())
 {