post-process option for numbers; add chunks method to string extensions

zero/Extensions/StringExtensions.cs

@@ -250,4 +250,25 @@ public static class StringExtensions
 
     return result.ToString().ToLowerInvariant();
   }
+
+
+  public static IEnumerable<string> Chunks(this string text, int groupSize)
+  {
+    ArgumentException.ThrowIfNullOrEmpty(text);
+
+    if (groupSize < 1)
+    {
+      throw new ArgumentException();
+    }
+
+    for (int i = 0; i < text.Length; i += groupSize)
+    {
+      if (groupSize + i > text.Length)
+      {
+        groupSize = text.Length - i;
+      }
+
+      yield return text.Substring(i, groupSize);
+    }
+  }
 }

zero/Numbers/Number.cs

@@ -44,6 +44,11 @@ public class Number : ZeroEntity
   /// Store current counters
   /// </summary>
   public List<NumberCounter> Counters { get; set; } = new();
+
+  /// <summary>
+  /// Post process the compiled number
+  /// </summary>
+  public virtual string PostProcess(string compiled) => compiled;
 }
 
 

zero/Numbers/Numbers.cs

@@ -77,7 +77,7 @@ public class Numbers : INumbers
     await Db.Update(number);
 
     // compiles the template and returns the rendered result
-    return Compile(number.Template, value, number.MinLength, date);
+    return Compile(number.Template, value, number.MinLength, date, number.PostProcess);
   }
 
 
@@ -121,14 +121,14 @@ public class Numbers : INumbers
 
 
   /// <inheritdoc />
-  public string Compile(string template, long value, int minLength, DateTimeOffset? date = null)
+  public string Compile(string template, long value, int minLength, DateTimeOffset? date = null, Func<string, string> postProcess = null)
   {
-    return Compile(template, value, minLength, date.HasValue ? DateOnly.FromDateTime(date.Value.Date) : null);
+    return Compile(template, value, minLength, date.HasValue ? DateOnly.FromDateTime(date.Value.Date) : null, postProcess);
   }
 
 
   /// <inheritdoc />
-  public string Compile(string template, long value, int minLength, DateOnly? date = null)
+  public string Compile(string template, long value, int minLength, DateOnly? date = null, Func<string, string> postProcess = null)
   {
     string output = template;
     MatchCollection matches = templateRegex.Matches(output);
@@ -171,6 +171,11 @@ public class Numbers : INumbers
       output = output.ReplaceFirst(original, result);
     }
 
+    if (postProcess != null)
+    {
+      output = postProcess(output);
+    }
+
     return output;
   }
 
@@ -300,10 +305,10 @@ public interface INumbers
   /// <summary>
   /// Renders the final output from the template and the value
   /// </summary>
-  string Compile(string template, long value, int minLength, DateTimeOffset? date = null);
+  string Compile(string template, long value, int minLength, DateTimeOffset? date = null, Func<string, string> postProcess = null);
 
   /// <summary>
   /// Renders the final output from the template and the value
   /// </summary>
-  string Compile(string template, long value, int minLength, DateOnly? date = null);
+  string Compile(string template, long value, int minLength, DateOnly? date = null, Func<string, string> postProcess = null);
 }