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199 lines
6.0 KiB
199 lines
6.0 KiB
using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.Linq;
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using System.Text;
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using System.Text.RegularExpressions;
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namespace NzbDrone.Common.Extensions
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{
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public static class StringExtensions
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{
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private static readonly Regex CamelCaseRegex = new Regex("(?<!^)[A-Z]", RegexOptions.Compiled);
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public static string NullSafe(this string target)
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{
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return ((object)target).NullSafe().ToString();
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}
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public static object NullSafe(this object target)
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{
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if (target != null)
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{
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return target;
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}
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return "[NULL]";
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}
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public static string FirstCharToLower(this string input)
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{
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if (string.IsNullOrEmpty(input))
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{
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return string.Empty;
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}
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return char.ToLowerInvariant(input.First()) + input.Substring(1);
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}
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public static string FirstCharToUpper(this string input)
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{
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if (string.IsNullOrEmpty(input))
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{
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return string.Empty;
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}
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return char.ToUpperInvariant(input.First()) + input.Substring(1);
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}
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public static string Inject(this string format, params object[] formattingArgs)
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{
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return string.Format(format, formattingArgs);
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}
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private static readonly Regex CollapseSpace = new Regex(@"\s+", RegexOptions.Compiled);
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public static string Replace(this string text, int index, int length, string replacement)
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{
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text = text.Remove(index, length);
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text = text.Insert(index, replacement);
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return text;
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}
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public static string RemoveAccent(this string text)
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{
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var normalizedString = text.Normalize(NormalizationForm.FormD);
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var stringBuilder = new StringBuilder();
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foreach (var c in normalizedString)
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{
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var unicodeCategory = CharUnicodeInfo.GetUnicodeCategory(c);
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if (unicodeCategory != UnicodeCategory.NonSpacingMark)
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{
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stringBuilder.Append(c);
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}
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}
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return stringBuilder.ToString().Normalize(NormalizationForm.FormC);
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}
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public static string TrimEnd(this string text, string postfix)
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{
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if (text.EndsWith(postfix))
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{
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text = text.Substring(0, text.Length - postfix.Length);
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}
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return text;
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}
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public static string Join(this IEnumerable<string> values, string separator)
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{
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return string.Join(separator, values);
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}
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public static string CleanSpaces(this string text)
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{
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return CollapseSpace.Replace(text, " ").Trim();
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}
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public static bool IsNullOrWhiteSpace(this string text)
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{
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return string.IsNullOrWhiteSpace(text);
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}
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public static bool IsNotNullOrWhiteSpace(this string text)
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{
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return !string.IsNullOrWhiteSpace(text);
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}
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public static bool StartsWithIgnoreCase(this string text, string startsWith)
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{
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return text.StartsWith(startsWith, StringComparison.InvariantCultureIgnoreCase);
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}
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public static bool EndsWithIgnoreCase(this string text, string startsWith)
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{
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return text.EndsWith(startsWith, StringComparison.InvariantCultureIgnoreCase);
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}
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public static bool EqualsIgnoreCase(this string text, string equals)
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{
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return text.Equals(equals, StringComparison.InvariantCultureIgnoreCase);
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}
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public static bool ContainsIgnoreCase(this string text, string contains)
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{
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return text.IndexOf(contains, StringComparison.InvariantCultureIgnoreCase) > -1;
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}
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public static string WrapInQuotes(this string text)
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{
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if (!text.Contains(" "))
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{
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return text;
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}
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return "\"" + text + "\"";
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}
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public static byte[] HexToByteArray(this string input)
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{
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return Enumerable.Range(0, input.Length)
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.Where(x => x % 2 == 0)
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.Select(x => Convert.ToByte(input.Substring(x, 2), 16))
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.ToArray();
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}
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public static string ToHexString(this byte[] input)
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{
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return string.Concat(Array.ConvertAll(input, x => x.ToString("X2")));
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}
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public static string FromOctalString(this string octalValue)
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{
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octalValue = octalValue.TrimStart('\\');
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var first = int.Parse(octalValue.Substring(0, 1));
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var second = int.Parse(octalValue.Substring(1, 1));
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var third = int.Parse(octalValue.Substring(2, 1));
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var byteResult = (byte)((first << 6) | (second << 3) | third);
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return Encoding.ASCII.GetString(new[] { byteResult });
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}
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public static string SplitCamelCase(this string input)
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{
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return CamelCaseRegex.Replace(input, match => " " + match.Value);
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}
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public static bool ContainsIgnoreCase(this IEnumerable<string> source, string value)
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{
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return source.Contains(value, StringComparer.InvariantCultureIgnoreCase);
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}
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public static string ToUrlSlug(this string value)
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{
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//First to lower case
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value = value.ToLowerInvariant();
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//Remove all accents
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value = value.RemoveAccent();
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//Replace spaces
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value = Regex.Replace(value, @"\s", "-", RegexOptions.Compiled);
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//Remove invalid chars
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value = Regex.Replace(value, @"[^a-z0-9\s-_]", "", RegexOptions.Compiled);
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//Trim dashes from end
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value = value.Trim('-', '_');
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//Replace double occurences of - or _
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value = Regex.Replace(value, @"([-_]){2,}", "$1", RegexOptions.Compiled);
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return value;
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}
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}
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}
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