Added some data annotations to validate SetupViewModel

--HG--
branch : dev

src/Orchard.Web/Core/Orchard.Core.csproj

@@ -111,6 +111,8 @@
     <Compile Include="Scheduling\Models\Task.cs" />
     <Compile Include="Settings\Controllers\SiteSettingsDriver.cs" />
     <Compile Include="Settings\Permissions.cs" />
+    <Compile Include="Setup\Annotations\SqlDatabaseConnectionStringAttribute.cs" />
+    <Compile Include="Setup\Annotations\StringLengthMin.cs" />
     <Compile Include="Setup\Controllers\SetupController.cs" />
     <Compile Include="Setup\Routes.cs" />
     <Compile Include="Setup\Services\ISetupService.cs" />

src/Orchard.Web/Core/Setup/Annotations/SqlDatabaseConnectionStringAttribute.cs

@@ -0,0 +1,21 @@
+using System.ComponentModel.DataAnnotations;
+using System.Data.SqlClient;
+
+namespace Orchard.Core.Setup.Annotations {
+    public class SqlDatabaseConnectionStringAttribute : ValidationAttribute {
+        public override bool IsValid(object value) {
+            if (value is string && ((string)value).Length > 0) {
+                try {
+                    var connectionStringBuilder = new SqlConnectionStringBuilder(value as string);
+
+                    //TODO: (erikpo) Should the keys be checked here to ensure that a valid combination was entered? Needs investigation.
+                }
+                catch {
+                    return false;
+                }
+            }
+
+            return true;
+        }
+    }
+}

src/Orchard.Web/Core/Setup/Annotations/StringLengthMin.cs

@@ -0,0 +1,19 @@
+using System;
+using System.ComponentModel.DataAnnotations;
+
+namespace Orchard.Core.Setup.Annotations {
+    public class StringLengthMin : ValidationAttribute {
+        private readonly int _minimumLength;
+
+        public StringLengthMin(int minimumLength) {
+            _minimumLength = minimumLength;
+
+            if (minimumLength <= 1)
+                throw new ArgumentException("Value must be greater than or equal to 2", "minimumLength");
+        }
+
+        public override bool IsValid(object value) {
+            return !(value is string) || (value as string).Length >= _minimumLength;
+        }
+    }
+}

src/Orchard.Web/Core/Setup/ViewModels/SetupViewModel.cs

@@ -1,10 +1,16 @@
+using System.ComponentModel.DataAnnotations;
+using Orchard.Core.Setup.Annotations;
 using Orchard.Mvc.ViewModels;
 
 namespace Orchard.Core.Setup.ViewModels {
     public class SetupViewModel : BaseViewModel {
+        [Required, StringLength(70)]
         public string SiteName { get; set; }
+        [StringLengthMin(3), StringLength(25)]
         public string AdminUsername { get; set; }
+        [StringLengthMin(6), StringLength(20)]
         public string AdminPassword { get; set; }
+        [SqlDatabaseConnectionString]
         public string DatabaseConnectionString { get; set; }
     }
 }