feat: Added CultureInfo extensions for converting between 12 hour and 24 hour time formatting

CHANGELOG.md

@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
  - Added math util method for modulus
  - Added TimeSpan extension methods for cycling hours and minutes without modifying the day
  - Added a dictionary extension method for getting or adding a new value via func
+ - Added CultureInfo extensions for converting between 12 hour and 24 hour time formatting
 
 ### Changed
  - The Root Config path in Net Standard will now be the ICD.Connect folder in the current environments ProgramData directory

ICD.Common.Utils/Extensions/CultureInfoExtensions.cs

@@ -1,4 +1,5 @@
-using System.Globalization;
+using System;
+using System.Globalization;
 
 namespace ICD.Common.Utils.Extensions
 {
@@ -11,7 +12,79 @@ namespace ICD.Common.Utils.Extensions
 		/// <returns></returns>
 		public static bool Uses24HourFormat(this CultureInfo extends)
 		{
+			if (extends == null)
+				throw new ArgumentNullException("extends");
+
 			return extends.DateTimeFormat.ShortTimePattern.Contains("H");
 		}
+
+		/// <summary>
+		/// Updates the time patterns for the given culture to use 12 hour time.
+		/// </summary>
+		/// <param name="extends"></param>
+		public static void ConvertTo12HourCulture(this CultureInfo extends)
+		{
+			if (extends == null)
+				throw new ArgumentNullException("extends");
+
+			if (extends.IsReadOnly)
+				throw new InvalidOperationException("Culture is readonly");
+
+			DateTimeFormatInfo dateTimeFormat = extends.DateTimeFormat;
+
+			dateTimeFormat.FullDateTimePattern = To12HourPattern(dateTimeFormat.FullDateTimePattern);
+			dateTimeFormat.LongTimePattern = To12HourPattern(dateTimeFormat.LongTimePattern);
+			dateTimeFormat.ShortTimePattern = To12HourPattern(dateTimeFormat.ShortTimePattern);
+		}
+
+		/// <summary>
+		/// Updates the time patterns for the given culture to use 24 hour time.
+		/// </summary>
+		/// <param name="extends"></param>
+		public static void ConvertTo24HourCulture(this CultureInfo extends)
+		{
+			if (extends == null)
+				throw new ArgumentNullException("extends");
+
+			if (extends.IsReadOnly)
+				throw new InvalidOperationException("Culture is readonly");
+
+			DateTimeFormatInfo dateTimeFormat = extends.DateTimeFormat;
+
+			dateTimeFormat.FullDateTimePattern = To24HourPattern(dateTimeFormat.FullDateTimePattern);
+			dateTimeFormat.LongTimePattern = To24HourPattern(dateTimeFormat.LongTimePattern);
+			dateTimeFormat.ShortTimePattern = To24HourPattern(dateTimeFormat.ShortTimePattern);
+		}
+
+		/// <summary>
+		/// Converts the given format pattern to use 24 hour time.
+		/// </summary>
+		/// <param name="pattern"></param>
+		/// <returns></returns>
+		private static string To24HourPattern(string pattern)
+		{
+			if (pattern == null)
+				return null;
+
+			pattern = pattern.Replace(" tt", "");
+
+			return pattern.Replace("h", "H");
+		}
+
+		/// <summary>
+		/// Converts the given format pattern to use 12 hour time.
+		/// </summary>
+		/// <param name="pattern"></param>
+		/// <returns></returns>
+		private static string To12HourPattern(string pattern)
+		{
+			if (pattern == null)
+				return null;
+
+			if (!pattern.Contains("t"))
+				pattern = pattern + " tt";
+
+			return pattern.Replace("H", "h");
+		}
 	}
 }