Captcha and Recaptcha, closes #21

.gitignore

@@ -11,6 +11,10 @@
 *.sln.docstates
 *.local.sln
 *.sln.GhostDoc.xml
+DotNetNuke.Modules.UserDefinedTable.xml
+web.config
+web.Debug.config
+web.Release.config
 
 ## Ignore VS2015/Roslyn artifacts
 *.sln.ide/

App_LocalResources/form.ascx.resx

@@ -159,4 +159,10 @@
   <data name="MonthNames.Text" xml:space="preserve">
     <value>'January','Februrary','March','April','May','June','July','August','September','October','November','December'</value>
   </data>
+  <data name="ReCaptcha.Text" xml:space="preserve">
+    <value>ReCaptcha</value>
+  </data>
+  <data name="ReCaptchaError.Text" xml:space="preserve">
+    <value>An unexpected error has occured, please try again.</value>
+  </data>
 </root>

App_LocalResources/settings.ascx.resx

@@ -112,10 +112,10 @@
     <value>2.0</value>
   </resheader>
   <resheader name="reader">
-    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
   <resheader name="writer">
-    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
   <data name="ModuleHelp.Text" xml:space="preserve">
     <value>&lt;h1&gt;Specific Settings for Form and List Module&lt;/h1&gt;
@@ -145,8 +145,8 @@
   <data name="EditOwnData.Text" xml:space="preserve">
     <value>Users are only allowed to manipulate their own items.</value>
   </data>
-  <data name="ForceCaptcha.Text" xml:space="preserve">
-    <value>Force CAPTCHA control during edit for Anonymous users.</value>
+  <data name="lblForceCaptcha.Text" xml:space="preserve">
+    <value>Force CAPTCHA for Anonymous users.</value>
   </data>
   <data name="InputFiltering.Text" xml:space="preserve">
     <value>Filter entry for markup code or script input. Note: filtering is always enabled for Anonymous users.</value>
@@ -166,4 +166,28 @@
   <data name="DisplaySystemColumns.Text" xml:space="preserve">
     <value>Hide System Fields even if "Display All Column" permission is set.</value>
   </data>
+  <data name="lblForceCaptcha.Help" xml:space="preserve">
+    <value>Select the captcha type to use for anonymous users.</value>
+  </data>
+  <data name="DnnCaptcha.Text" xml:space="preserve">
+    <value>DnnCaptcha</value>
+  </data>
+  <data name="No.Text" xml:space="preserve">
+    <value>No</value>
+  </data>
+  <data name="ReCaptcha.Text" xml:space="preserve">
+    <value>ReCaptcha</value>
+  </data>
+  <data name="lblSecretKey.Help" xml:space="preserve">
+    <value>Obtain your secret key at &lt;a href="https://www.google.com/recaptcha" target="_blank"&gt;https://www.google.com/recaptcha&lt;/a&gt;</value>
+  </data>
+  <data name="lblSecretKey.Text" xml:space="preserve">
+    <value>ReCaptcha Secret Key</value>
+  </data>
+  <data name="lblSiteKey.Help" xml:space="preserve">
+    <value>Obtain your site key at &lt;a href="https://www.google.com/recaptcha" target="_blank"&gt;https://www.google.com/recaptcha&lt;/a&gt;</value>
+  </data>
+  <data name="lblSiteKey.Text" xml:space="preserve">
+    <value>ReCaptcha Site Key</value>
+  </data>
 </root>

Components/GlobalConstants.cs

@@ -130,6 +130,9 @@ public class SettingName
         public const string URLSearch = "UDT_URLSearch";
  //       public const string UseButtons = "UDT_UseButtons";
         public const string ForceCaptchaForAnonymous = "UDT_ForceCaptchaForAnonymous";
+        public const string PreferReCaptcha = "UDT_PreferReCaptcha";
+        public const string ReCaptchaSiteKey = "UDT_ReCaptchaSiteKey";
+        public const string ReCaptchaSecretKey = "UDT_ReCaptchaPrivateKey";
         public const string ForceInputFiltering = "UDT_ForceFiltering";
         public const string EditOnlyOwnItems = "UDT_EditOnlyOwnItems";
         public const string ExcludeFromSearch = "UDT_ExcludeFromSearch";

Components/ReCaptcha.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Web;
+using Newtonsoft.Json; 
+
+namespace DotNetNuke.Modules.UserDefinedTable.Components
+{
+    public class ReCaptcha
+    {
+        public static bool Validate(string encodedResponse, string privateKey)
+        {
+            var client = new System.Net.WebClient();
+            var googleReply = client.DownloadString(string.Format("https://www.google.com/recaptcha/api/siteverify?secret={0}&response={1}", privateKey, encodedResponse));
+            var captchaResponse = Newtonsoft.Json.JsonConvert.DeserializeObject<ReCaptcha>(googleReply);
+            return captchaResponse.Success;
+        }
+
+        [JsonProperty("success")]
+        public bool Success { get; set; }
+
+        [JsonProperty("error-codes")]
+        public List<string> ErrorCodes { get; set; }
+    }
+}

Components/ReCaptchaReply.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Web;
+
+namespace DotNetNuke.Modules.UserDefinedTable.Components
+{
+    public class ReCaptchaReply
+    {
+        public bool Success { get; set; }
+    }
+}

Components/Settings.cs

@@ -37,6 +37,21 @@ public bool ForceCaptchaForAnonymous
             get { return _settings[SettingName.ForceCaptchaForAnonymous].AsBoolean(); }
         }
 
+        public bool PreferReCaptcha
+        {
+            get { return _settings[SettingName.PreferReCaptcha].AsBoolean(); }
+        }
+
+        public string ReCaptchaSiteKey
+        {
+            get { return _settings[SettingName.ReCaptchaSiteKey].AsString(); }
+        }
+
+        public string ReCaptchaSecretKey
+        {
+            get { return _settings[SettingName.ReCaptchaSecretKey].AsString(); }
+        }
+
         public string ListOrForm
         {
             get { return _settings[SettingName.ListOrForm].AsString("List"); }