// Copyright © 2020 The CefSharp Authors. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
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using System.Text.RegularExpressions;
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namespace CefSharp.Internals
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{
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/// <summary>
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/// String validation
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/// </summary>
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public static class StringCheck
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{
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/// <summary>
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/// Regex check to ensure string contains only letters, numbers and underscores.
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/// </summary>
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/// <param name="stringToCheck"></param>
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/// <returns>false if string is invalid</returns>
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public static bool IsLettersAndNumbers(string stringToCheck)
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{
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if (string.IsNullOrWhiteSpace(stringToCheck))
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{
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return false;
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}
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return Regex.IsMatch(stringToCheck, @"^\w+$");
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}
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/// <summary>
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/// Return true if the first chracter of the specified string is lowercase
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/// </summary>
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/// <param name="str">string</param>
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/// <returns>returns false if empty or null, otherwise true if first character is lowercase</returns>
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public static bool IsFirstCharacterLowercase(string str)
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{
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if (!string.IsNullOrEmpty(str))
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{
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if (char.IsLetter(str[0]))
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{
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return char.IsLower(str[0]);
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}
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}
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return false;
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}
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}
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}
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