Add ToSentenceCaseAttribute

[centenario]

Hi,
id like to know if its possible mutates value of property:

• First char like Uppercase
• The others chars in lowercase
  f.i. : the REAL thing ===> The real thing

thanks in advance

[roydukkey]

Sure. Here an example that follows the same pattern for the existing ToLowerAttribute and ToUpperAttribute.

using System;
using System.Globalization;

namespace Dado.ComponentModel.DataMutations
{
	[AttributeUsage(AttributeTargets.Property)]
	public class ToTitleCaseAttribute : MutationAttribute
	{
		public CultureInfo CultureInfo { get; set; } = CultureInfo.CurrentCulture;
		public override int Priority { get; set; } = 40;

		protected override object MutateValue(object value, IMutationContext context)
		{
			if (value is string valueAsString && !String.IsNullOrWhiteSpace(valueAsString)) {
				return CultureInfo.TextInfo.ToTitleCase(valueAsString);
			}

			if (value is char valueAsChar) {
				return CultureInfo.TextInfo.ToTitleCase();
			}

			return value;
		}
	}
}

This should probably be including in this package.

[roydukkey]

Sorry. I was off target with my first attempt. Here is something I've slapped together referencing a post on StackOverflow. This is untested, but it should get you moving in the right direction.

using System;
using System.Text.RegularExpressions;

namespace Dado.ComponentModel.DataMutations
{
	[AttributeUsage(AttributeTargets.Property)]
	public class ToSentenceCaseAttribute : MutationAttribute
	{
		public override int Priority { get; set; } = 40;
		
		protected override object MutateValue(object value, IMutationContext context)
		{
			if (value != null && value is string valueAsString) {
				return new Regex(@"(?<=(^|[.;:])\s*)[a-z]", RegexOptions.Compiled)
					.Replace(valueAsString, (match) => match.Value.ToUpper());
			}

			return value;
		}
	}
}