PluralKit/PluralKit.Bot/Utils/StringUtils.cs

52 lines
2.0 KiB
C#

using System;
using System.Globalization;
using System.Text.RegularExpressions;
using Discord;
namespace PluralKit.Bot
{
public static class StringUtils
{
public static Color? ToDiscordColor(this string color)
{
if (uint.TryParse(color, NumberStyles.HexNumber, null, out var colorInt))
return new Color(colorInt);
throw new ArgumentException($"Invalid color string '{color}'.");
}
public static bool HasMentionPrefix(string content, ref int argPos, out ulong mentionId)
{
mentionId = 0;
// Roughly ported from Discord.Commands.MessageExtensions.HasMentionPrefix
if (string.IsNullOrEmpty(content) || content.Length <= 3 || (content[0] != '<' || content[1] != '@'))
return false;
int num = content.IndexOf('>');
if (num == -1 || content.Length < num + 2 || content[num + 1] != ' ' || !MentionUtils.TryParseUser(content.Substring(0, num + 1), out mentionId))
return false;
argPos = num + 2;
return true;
}
public static bool TryParseMention(this string potentialMention, out ulong id)
{
if (ulong.TryParse(potentialMention, out id)) return true;
if (MentionUtils.TryParseUser(potentialMention, out id)) return true;
return false;
}
public static string SanitizeMentions(this string input) =>
Regex.Replace(Regex.Replace(input, "<@[!&]?(\\d{17,19})>", "<\u200B@$1>"), "@(everyone|here)", "@\u200B$1");
public static string SanitizeEveryone(this string input) =>
Regex.Replace(input, "@(everyone|here)", "@\u200B$1");
public static string EscapeMarkdown(this string input)
{
Regex pattern = new Regex(@"[*_~>`(||)\\]", RegexOptions.Multiline);
if (input != null) return pattern.Replace(input, @"\$&");
else return input;
}
}
}