Fixes U4-3314 Doctype property alias doesn't auto generate camelcase but does pascalcase instead

src/Umbraco.Core/StringExtensions.cs

@@ -952,6 +952,16 @@ namespace Umbraco.Core
             return ShortStringHelper.CleanStringForSafeAlias(alias);
         }
 
+        /// <summary>
+        /// Cleans a string to produce a string that can safely be used in an alias.
+        /// </summary>
+        /// <param name="alias">The text to filter.</param>
+        /// <returns>The safe alias.</returns>
+        public static string ToSafeCamelAlias(this string alias)
+        {
+            return ShortStringHelper.CleanStringForSafeCamelAlias(alias);
+        }
+
         /// <summary>
         /// Cleans a string, in the context of a specified culture, to produce a string that can safely be used in an alias.
         /// </summary>

src/Umbraco.Core/Strings/DefaultShortStringHelper.cs

@@ -248,6 +248,34 @@ function validateSafeAlias(id, value, immediate, callback) {{
             return CleanString(text, CleanStringType.Ascii | CleanStringType.UmbracoCase | CleanStringType.Alias);
         }
 
+        /// <summary>
+        /// Cleans a string to produce a string that can safely be used in an alias.
+        /// </summary>
+        /// <param name="text">The text to filter.</param>
+        /// <returns>The safe alias.</returns>
+        /// <remarks>
+        /// <para>The string will be cleaned in the context of the default culture.</para>
+        /// <para>Safe aliases are Ascii only.</para>
+        /// </remarks>
+        public virtual string CleanStringForSafeCamelAlias(string text)
+        {
+            return CleanString(text, CleanStringType.Ascii | CleanStringType.CamelCase | CleanStringType.Alias);
+        }
+
+        /// <summary>
+        /// Cleans a string, in the context of a specified culture, to produce a string that can safely be used in an alias.
+        /// </summary>
+        /// <param name="text">The text to filter.</param>
+        /// <param name="culture">The culture.</param>
+        /// <returns>The safe alias.</returns>
+        /// <remarks>
+        /// <para>Safe aliases are Ascii only.</para>
+        /// </remarks>
+        public virtual string CleanStringForSafeCamelAlias(string text, CultureInfo culture)
+        {
+            return CleanString(text, CleanStringType.Ascii | CleanStringType.CamelCase | CleanStringType.Alias, culture);
+        }
+
         /// <summary>
         /// Cleans a string, in the context of a specified culture, to produce a string that can safely be used in an alias.
         /// </summary>

src/Umbraco.Core/Strings/IShortStringHelper.cs

@@ -31,6 +31,19 @@ namespace Umbraco.Core.Strings
         /// </remarks>
         string CleanStringForSafeAlias(string text);
 
+
+        /// <summary>
+        /// Cleans a string to produce a string that can safely be used in an alias.
+        /// </summary>
+        /// <param name="text">The text to filter.</param>
+        /// <returns>The safe alias.</returns>
+        /// <remarks>
+        /// <para>The string will be cleaned in the context of the IShortStringHelper default culture.</para>
+        /// <para>A safe alias is [a-z][a-zA-Z0-9_]* although legacy will also accept '-', and '_' at the beginning.</para>
+        /// </remarks>
+        string CleanStringForSafeCamelAlias(string text);
+
+
         /// <summary>
         /// Cleans a string, in the context of a specified culture, to produce a string that can safely be used in an alias.
         /// </summary>
@@ -39,6 +52,14 @@ namespace Umbraco.Core.Strings
         /// <returns>The safe alias.</returns>
         string CleanStringForSafeAlias(string text, CultureInfo culture);
 
+        /// <summary>
+        /// Cleans a string, in the context of a specified culture, to produce a string that can safely be used in an alias.
+        /// </summary>
+        /// <param name="text">The text to filter.</param>
+        /// <param name="culture">The culture.</param>
+        /// <returns>The safe alias.</returns>
+        string CleanStringForSafeCamelAlias(string text, CultureInfo culture);
+
         /// <summary>
         /// Cleans a string to produce a string that can safely be used in an url segment.
         /// </summary>

src/Umbraco.Core/Strings/LegacyShortStringHelper.cs

@@ -138,6 +138,18 @@ function isValidAlias(alias) {{
             return safeString.ToString();
         }
 
+        /// <summary>
+        /// Cleans a string to produce a string that can safely be used in an alias.
+        /// </summary>
+        /// <param name="text">The text to filter.</param>
+        /// <returns>The safe alias.</returns>
+        /// <remarks>The string will be cleaned in the context of invariant culture.</remarks>
+        public string CleanStringForSafeCamelAlias(string text)
+        {
+            var t = CleanStringForSafeAlias(text);
+            return Char.ToLowerInvariant(t[0]) + t.Substring(1);
+        }
+
         /// <summary>
         /// Cleans a string, in the context of the invariant culture, to produce a string that can safely be used in an alias.
         /// </summary>
@@ -150,6 +162,18 @@ function isValidAlias(alias) {{
             return CleanStringForSafeAlias(text);
         }
 
+        /// <summary>
+        /// Cleans a string, in the context of the invariant culture, to produce a string that can safely be used in an alias.
+        /// </summary>
+        /// <param name="text">The text to filter.</param>
+        /// <param name="culture">The culture.</param>
+        /// <returns>The safe alias.</returns>
+        /// <remarks>Legacy does not support culture contexts.</remarks>
+        public string CleanStringForSafeCamelAlias(string text, CultureInfo culture)
+        {
+            return CleanStringForSafeCamelAlias(text);
+        }
+
         /// <summary>
         /// Cleans a string to produce a string that can safely be used in an url segment, in the context of the invariant culture.
         /// </summary>

src/Umbraco.Tests/CoreStrings/MockShortStringHelper.cs

@@ -19,11 +19,21 @@ namespace Umbraco.Tests.CoreStrings
             return "SAFE-ALIAS::" + text;
         }
 
+        public string CleanStringForSafeCamelAlias(string text)
+        {
+            return "SAFE-ALIAS::" + text;
+        }
+
         public string CleanStringForSafeAlias(string text, System.Globalization.CultureInfo culture)
         {
             return "SAFE-ALIAS-CULTURE::" + text;
         }
 
+        public string CleanStringForSafeCamelAlias(string text, System.Globalization.CultureInfo culture)
+        {
+            return "SAFE-ALIAS-CULTURE::" + text;
+        }
+
         public string CleanStringForUrlSegment(string text)
         {
             return "URL-SEGMENT::" + text;

src/Umbraco.Web/WebServices/CoreStringsController.cs

@@ -18,11 +18,11 @@ namespace Umbraco.Web.WebServices
     public class CoreStringsController : UmbracoAuthorizedController
     {
         [HttpGet]
-        public JsonResult ToSafeAlias(string value)
+        public JsonResult ToSafeAlias(string value, bool camelCase = true)
         {
             return value == null 
-                ? Json(new {error = "no value."}, JsonRequestBehavior.AllowGet) 
-                : Json(new { alias = value.ToSafeAlias() }, JsonRequestBehavior.AllowGet);
+                ? Json(new {error = "no value."}, JsonRequestBehavior.AllowGet)
+                : Json(new { alias = camelCase ? value.ToSafeCamelAlias() : value.ToSafeAlias() }, JsonRequestBehavior.AllowGet);
         }
 
         [HttpGet]