79 lines
2.8 KiB
C#
79 lines
2.8 KiB
C#
using System.Security.Cryptography;
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using System.Text;
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using System.Text.RegularExpressions;
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using JSMachine.DCS.Infrastructure;
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// ReSharper disable once CheckNamespace
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namespace System
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{
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public static class StringExtensions
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{
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public static string RandomString(int length)
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{
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var b = new byte[4];
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new RNGCryptoServiceProvider().GetBytes(b);
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var r = new Random(BitConverter.ToInt32(b, 0));
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var ret = string.Empty;
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const string str = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
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for (var i = 0; i < length; i++)
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ret += str.Substring(r.Next(0, str.Length - 1), 1);
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return ret;
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}
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public static string LogId => RandomString(48);
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public static string GetMatch(this string text, string p1, string p2)
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{
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var rg = new Regex("(?<=(" + p1 + "))[.\\s\\S]*?(?=(" + p2 + "))",
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RegexOptions.Multiline | RegexOptions.Singleline);
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return rg.Match(text).Value;
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}
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public static bool IsEmailAddress(this string @this)
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{
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return !string.IsNullOrEmpty(@this) && !string.IsNullOrWhiteSpace(@this); // TODO
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}
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public static string TrimMiddle(this string @this, int limitLength, string omitPlaceholder = null)
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{
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const string defaultOmitPlaceholder = "...";
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if (omitPlaceholder == null) omitPlaceholder = defaultOmitPlaceholder;
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Guards.ThrowIfNot(limitLength >= omitPlaceholder.Length);
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if (string.IsNullOrEmpty(@this) || @this.Length <= limitLength) return @this;
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if (limitLength == omitPlaceholder.Length) return omitPlaceholder;
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var halfLength = (limitLength - omitPlaceholder.Length) / 2;
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var bias = (limitLength - omitPlaceholder.Length) % 2;
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var firstHalfString = @this.Substring(0, halfLength + bias);
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var secondHalfString = @this.Substring(@this.Length - halfLength);
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return $"{firstHalfString}{omitPlaceholder}{secondHalfString}";
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}
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public static string UpperCamelCaseToDelimiterSeparated(this string upperCamelCase)
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{
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var stringBuilder = new StringBuilder(upperCamelCase.Length, upperCamelCase.Length * 2);
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for (int i = 0; i < upperCamelCase.Length; i++)
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{
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var @char = upperCamelCase[i];
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if (char.IsUpper(@char))
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{
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if (i != 0) stringBuilder.Append('-');
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stringBuilder.Append(char.ToLower(@char));
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}
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else
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{
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stringBuilder.Append(@char);
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}
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}
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return stringBuilder.ToString();
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}
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}
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}
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