335 lines
14 KiB
C#
335 lines
14 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Data;
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using System.IO;
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using System.Linq;
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using System.Security.Cryptography;
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using System.Text.RegularExpressions;
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using Dapper;
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using Microsoft.Extensions.Configuration;
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using Newtonsoft.Json;
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using NodaTime;
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using NodaTime.Serialization.JsonNet;
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using NodaTime.Text;
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using Npgsql;
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namespace PluralKit
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{
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public static class Utils
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{
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public static string GenerateHid()
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{
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var rnd = new Random();
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var charset = "abcdefghijklmnopqrstuvwxyz";
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string hid = "";
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for (int i = 0; i < 5; i++)
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{
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hid += charset[rnd.Next(charset.Length)];
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}
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return hid;
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}
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public static string GenerateToken()
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{
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var buf = new byte[48]; // Results in a 64-byte Base64 string (no padding)
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new RNGCryptoServiceProvider().GetBytes(buf);
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return Convert.ToBase64String(buf);
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}
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public static string Truncate(this string str, int maxLength, string ellipsis = "...") {
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if (str.Length < maxLength) return str;
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return str.Substring(0, maxLength - ellipsis.Length) + ellipsis;
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}
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public static bool IsLongerThan(this string str, int length)
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{
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if (str != null) return str.Length > length;
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return false;
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}
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public static Duration? ParsePeriod(string str)
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{
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Duration d = Duration.Zero;
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foreach (Match match in Regex.Matches(str, "(\\d{1,6})(\\w)"))
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{
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var amount = int.Parse(match.Groups[1].Value);
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var type = match.Groups[2].Value;
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if (type == "w") d += Duration.FromDays(7) * amount;
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else if (type == "d") d += Duration.FromDays(1) * amount;
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else if (type == "h") d += Duration.FromHours(1) * amount;
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else if (type == "m") d += Duration.FromMinutes(1) * amount;
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else if (type == "s") d += Duration.FromSeconds(1) * amount;
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else return null;
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}
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if (d == Duration.Zero) return null;
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return d;
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}
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public static LocalDate? ParseDate(string str, bool allowNullYear = false)
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{
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// NodaTime can't parse constructs like "1st" and "2nd" so we quietly replace those away
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// Gotta make sure to do the regex otherwise we'll catch things like the "st" in "August" too
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str = Regex.Replace(str, "(\\d+)(st|nd|rd|th)", "$1");
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var patterns = new[]
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{
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"MMM d yyyy", // Jan 1 2019
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"MMM d, yyyy", // Jan 1, 2019
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"MMMM d yyyy", // January 1 2019
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"MMMM d, yyyy", // January 1, 2019
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"yyyy-MM-dd", // 2019-01-01
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"yyyy MM dd", // 2019 01 01
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"yyyy/MM/dd" // 2019/01/01
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}.ToList();
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if (allowNullYear) patterns.AddRange(new[]
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{
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"MMM d", // Jan 1
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"MMMM d", // January 1
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"MM-dd", // 01-01
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"MM dd", // 01 01
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"MM/dd" // 01/01
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});
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// Giving a template value so year will be parsed as 0001 if not present
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// This means we can later disambiguate whether a null year was given
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// TODO: should we be using invariant culture here?
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foreach (var pattern in patterns.Select(p => LocalDatePattern.CreateWithInvariantCulture(p).WithTemplateValue(new LocalDate(0001, 1, 1))))
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{
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var result = pattern.Parse(str);
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if (result.Success) return result.Value;
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}
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return null;
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}
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public static ZonedDateTime? ParseDateTime(string str, bool nudgeToPast = false, DateTimeZone zone = null)
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{
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if (zone == null) zone = DateTimeZone.Utc;
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// Find the current timestamp in the given zone, find the (naive) midnight timestamp, then put that into the same zone (and make it naive again)
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// Should yield a <current *local @ zone* date> 12:00:00 AM.
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var now = SystemClock.Instance.GetCurrentInstant().InZone(zone).LocalDateTime;
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var midnight = now.Date.AtMidnight();
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// First we try to parse the string as a relative time using the period parser
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var relResult = ParsePeriod(str);
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if (relResult != null)
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{
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// if we can, we just subtract that amount from the
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return now.InZoneLeniently(zone).Minus(relResult.Value);
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}
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var timePatterns = new[]
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{
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"H:mm", // 4:30
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"HH:mm", // 23:30
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"H:mm:ss", // 4:30:29
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"HH:mm:ss", // 23:30:29
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"h tt", // 2 PM
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"htt", // 2PM
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"h:mm tt", // 4:30 PM
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"h:mmtt", // 4:30PM
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"h:mm:ss tt", // 4:30:29 PM
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"h:mm:sstt", // 4:30:29PM
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"hh:mm tt", // 11:30 PM
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"hh:mmtt", // 11:30PM
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"hh:mm:ss tt", // 11:30:29 PM
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"hh:mm:sstt" // 11:30:29PM
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};
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var datePatterns = new[]
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{
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"MMM d yyyy", // Jan 1 2019
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"MMM d, yyyy", // Jan 1, 2019
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"MMMM d yyyy", // January 1 2019
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"MMMM d, yyyy", // January 1, 2019
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"yyyy-MM-dd", // 2019-01-01
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"yyyy MM dd", // 2019 01 01
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"yyyy/MM/dd", // 2019/01/01
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"MMM d", // Jan 1
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"MMMM d", // January 1
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"MM-dd", // 01-01
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"MM dd", // 01 01
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"MM/dd" // 01-01
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};
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// First, we try all the timestamps that only have a time
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foreach (var timePattern in timePatterns)
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{
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var pat = LocalDateTimePattern.CreateWithInvariantCulture(timePattern).WithTemplateValue(midnight);
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var result = pat.Parse(str);
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if (result.Success)
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{
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// If we have a successful match and we need a time in the past, we try to shove a future-time a date before
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// Example: "4:30 pm" at 3:30 pm likely refers to 4:30 pm the previous day
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var val = result.Value;
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// If we need to nudge, we just subtract a day. This only occurs when we're parsing specifically *just time*, so
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// we know we won't nudge it by more than a day since we use today's midnight timestamp as a date template.
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// Since this is a naive datetime, this ensures we're actually moving by one calendar day even if
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// DST changes occur, since they'll be resolved later wrt. the right side of the boundary
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if (val > now && nudgeToPast) val = val.PlusDays(-1);
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return val.InZoneLeniently(zone);
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}
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}
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// Then we try specific date+time combinations, both date first and time first
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foreach (var timePattern in timePatterns)
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{
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foreach (var datePattern in datePatterns)
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{
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var p1 = LocalDateTimePattern.CreateWithInvariantCulture($"{timePattern} {datePattern}").WithTemplateValue(midnight);
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var res1 = p1.Parse(str);
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if (res1.Success) return res1.Value.InZoneLeniently(zone);
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var p2 = LocalDateTimePattern.CreateWithInvariantCulture($"{datePattern} {timePattern}").WithTemplateValue(midnight);
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var res2 = p2.Parse(str);
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if (res2.Success) return res2.Value.InZoneLeniently(zone);
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}
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}
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// Finally, just date patterns, still using midnight as the template
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foreach (var datePattern in datePatterns)
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{
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var pat = LocalDateTimePattern.CreateWithInvariantCulture(datePattern).WithTemplateValue(midnight);
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var res = pat.Parse(str);
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if (res.Success) return res.Value.InZoneLeniently(zone);
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}
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// Still haven't parsed something, we just give up lmao
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return null;
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}
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public static string ExtractCountryFlag(string flag)
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{
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if (flag.Length != 4) return null;
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try
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{
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var cp1 = char.ConvertToUtf32(flag, 0);
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var cp2 = char.ConvertToUtf32(flag, 2);
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if (cp1 < 0x1F1E6 || cp1 > 0x1F1FF) return null;
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if (cp2 < 0x1F1E6 || cp2 > 0x1F1FF) return null;
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return $"{(char) (cp1 - 0x1F1E6 + 'A')}{(char) (cp2 - 0x1F1E6 + 'A')}";
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}
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catch (ArgumentException)
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{
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return null;
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}
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}
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public static IEnumerable<T> TakeWhileIncluding<T>(this IEnumerable<T> list, Func<T, bool> predicate)
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{
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// modified from https://stackoverflow.com/a/6817553
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foreach(var el in list)
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{
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yield return el;
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if (!predicate(el))
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yield break;
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}
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}
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}
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public static class Emojis {
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public static readonly string Warn = "\u26A0";
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public static readonly string Success = "\u2705";
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public static readonly string Error = "\u274C";
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public static readonly string Note = "\u2757";
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public static readonly string ThumbsUp = "\U0001f44d";
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public static readonly string RedQuestion = "\u2753";
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}
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public static class Formats
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{
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public static IPattern<Instant> TimestampExportFormat = InstantPattern.CreateWithInvariantCulture("g");
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public static IPattern<LocalDate> DateExportFormat = LocalDatePattern.CreateWithInvariantCulture("yyyy-MM-dd");
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// We create a composite pattern that only shows the two most significant things
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// eg. if we have something with nonzero day component, we show <x>d <x>h, but if it's
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// a smaller duration we may only bother with showing <x>h <x>m or <x>m <x>s
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public static IPattern<Duration> DurationFormat = new CompositePatternBuilder<Duration>
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{
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{DurationPattern.CreateWithInvariantCulture("s's'"), d => true},
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{DurationPattern.CreateWithInvariantCulture("m'm' s's'"), d => d.Minutes > 0},
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{DurationPattern.CreateWithInvariantCulture("H'h' m'm'"), d => d.Hours > 0},
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{DurationPattern.CreateWithInvariantCulture("D'd' h'h'"), d => d.Days > 0}
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}.Build();
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public static IPattern<LocalDateTime> LocalDateTimeFormat = LocalDateTimePattern.CreateWithInvariantCulture("yyyy-MM-dd HH:mm:ss");
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public static IPattern<ZonedDateTime> ZonedDateTimeFormat = ZonedDateTimePattern.CreateWithInvariantCulture("yyyy-MM-dd HH:mm:ss x", DateTimeZoneProviders.Tzdb);
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}
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public static class InitUtils
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{
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public static IConfigurationBuilder BuildConfiguration(string[] args) => new ConfigurationBuilder()
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.SetBasePath(Directory.GetCurrentDirectory())
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.AddJsonFile("pluralkit.conf", true)
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.AddEnvironmentVariables()
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.AddCommandLine(args);
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public static void Init()
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{
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InitDatabase();
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}
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private static void InitDatabase()
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{
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// Dapper by default tries to pass ulongs to Npgsql, which rejects them since PostgreSQL technically
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// doesn't support unsigned types on its own.
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// Instead we add a custom mapper to encode them as signed integers instead, converting them back and forth.
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SqlMapper.RemoveTypeMap(typeof(ulong));
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SqlMapper.AddTypeHandler<ulong>(new UlongEncodeAsLongHandler());
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Dapper.DefaultTypeMap.MatchNamesWithUnderscores = true;
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// Also, use NodaTime. it's good.
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NpgsqlConnection.GlobalTypeMapper.UseNodaTime();
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// With the thing we add above, Npgsql already handles NodaTime integration
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// This makes Dapper confused since it thinks it has to convert it anyway and doesn't understand the types
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// So we add a custom type handler that literally just passes the type through to Npgsql
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SqlMapper.AddTypeHandler(new PassthroughTypeHandler<Instant>());
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SqlMapper.AddTypeHandler(new PassthroughTypeHandler<LocalDate>());
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}
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public static JsonSerializerSettings BuildSerializerSettings() => new JsonSerializerSettings().BuildSerializerSettings();
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public static JsonSerializerSettings BuildSerializerSettings(this JsonSerializerSettings settings)
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{
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settings.ConfigureForNodaTime(DateTimeZoneProviders.Tzdb);
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return settings;
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}
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}
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public class UlongEncodeAsLongHandler : SqlMapper.TypeHandler<ulong>
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{
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public override ulong Parse(object value)
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{
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// Cast to long to unbox, then to ulong (???)
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return (ulong)(long)value;
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}
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public override void SetValue(IDbDataParameter parameter, ulong value)
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{
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parameter.Value = (long)value;
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}
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}
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public class PassthroughTypeHandler<T> : SqlMapper.TypeHandler<T>
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{
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public override void SetValue(IDbDataParameter parameter, T value)
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{
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parameter.Value = value;
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}
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public override T Parse(object value)
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{
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return (T) value;
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}
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}
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}
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