Fix repository

Netch/Utils/StringExtension.cs

@@ -0,0 +1,81 @@
+using System.Text;
+
+namespace Netch.Utils;
+
+public static class StringExtension
+{
+    public static bool IsNullOrEmpty(this string? value)
+    {
+        return string.IsNullOrEmpty(value);
+    }
+
+    public static bool IsNullOrWhiteSpace(this string? value)
+    {
+        return string.IsNullOrWhiteSpace(value);
+    }
+
+    public static bool BeginWithAny(this string s, IEnumerable<char> chars)
+    {
+        if (s.IsNullOrEmpty())
+            return false;
+
+        return chars.Contains(s[0]);
+    }
+
+    public static bool IsWhiteSpace(this string value)
+    {
+        return value.All(char.IsWhiteSpace);
+    }
+
+    public static IEnumerable<string> NonWhiteSpaceLines(this TextReader reader)
+    {
+        string? line;
+        while ((line = reader.ReadLine()) != null)
+        {
+            if (line.IsWhiteSpace())
+                continue;
+
+            yield return line;
+        }
+    }
+
+    public static string ToRegexString(this string value)
+    {
+        var sb = new StringBuilder();
+        foreach (var t in value)
+        {
+            var escapeCharacters = new[] { '\\', '*', '+', '?', '|', '{', '}', '[', ']', '(', ')', '^', '$', '.' };
+            if (escapeCharacters.Any(s => s == t))
+                sb.Append('\\');
+
+            sb.Append(t);
+        }
+
+        return sb.ToString();
+    }
+
+    public static string[] SplitRemoveEmptyEntriesAndTrimEntries(this string value, params char[] separator)
+    {
+        return value.Split(separator, StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
+    }
+
+    public static string[] SplitTrimEntries(this string value, params char[] separator)
+    {
+        return value.Split(separator, StringSplitOptions.TrimEntries);
+    }
+
+    public static string[] SplitRemoveEmptyEntries(this string value, params char[] separator)
+    {
+        return value.Split(separator, StringSplitOptions.RemoveEmptyEntries);
+    }
+
+    public static string? ValueOrDefault(this string? value, string? defaultValue = default)
+    {
+        return string.IsNullOrWhiteSpace(value) ? defaultValue : value;
+    }
+
+    public static string[]? SplitOrDefault(this string? value)
+    {
+        return !string.IsNullOrWhiteSpace(value) ? value.Split(',') : default;
+    }
+}