Implemented Fulltext search across tags and linebreaks for letters

HaWeb/SearchHelpers/StringHelpers.cs

@@ -0,0 +1,39 @@
+namespace HaWeb.SearchHelpers;
+using System.Text;
+
+public static class StringHelpers {
+    public static string NormalizeWhiteSpace(string input, char normalizeTo = ' ', bool toLower = true) {
+        if (string.IsNullOrEmpty(input)) {
+            return string.Empty;
+        }
+
+        StringBuilder output = new StringBuilder();
+
+        // TODO: what about punctuation (char.IsPunctuation()) ? what about spaces?
+
+        // Remove all whitespace, search becomes whitespace insensitive
+        // foreach (var c in input) 
+        //     if (!char.IsWhiteSpace(c))  {
+        //         if (toLower) output.Append(char.ToLower(c));
+        //         else output.Append(c);
+        //     }
+
+        // Collapse all whitespace into a single whitespace:
+        bool skipped = false;
+
+        foreach (char c in input) {
+            if (char.IsWhiteSpace(c)) {
+                if (!skipped) {
+                    output.Append(normalizeTo);
+                    skipped = true;
+                }
+            } else {
+                skipped = false;
+                if (toLower) output.Append(char.ToLower(c));
+                else output.Append(c);
+            }
+        }
+
+        return output.ToString();
+    }
+}