using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Common;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Text.RegularExpressions;
using System.Threading;
using System.Threading.Tasks;
using App.Metrics;
using App.Metrics.Timer;
using Dapper;
using Microsoft.Extensions.Configuration;
using Newtonsoft.Json;
using NodaTime;
using NodaTime.Serialization.JsonNet;
using NodaTime.Text;
using Npgsql;
using PluralKit.Core;
using Serilog;
using Serilog.Core;
using Serilog.Events;
using Serilog.Formatting.Compact;
using Serilog.Formatting.Display;
using Serilog.Formatting.Json;
using Serilog.Sinks.SystemConsole.Themes;
namespace PluralKit
{
public static class Utils
{
public static string GenerateHid()
{
var rnd = new Random();
var charset = "abcdefghijklmnopqrstuvwxyz";
string hid = "";
for (int i = 0; i < 5; i++)
{
hid += charset[rnd.Next(charset.Length)];
}
return hid;
}
public static string GenerateToken()
{
var buf = new byte[48]; // Results in a 64-byte Base64 string (no padding)
new RNGCryptoServiceProvider().GetBytes(buf);
return Convert.ToBase64String(buf);
}
public static bool IsLongerThan(this string str, int length)
{
if (str != null) return str.Length > length;
return false;
}
public static Duration? ParsePeriod(string str)
{
Duration d = Duration.Zero;
foreach (Match match in Regex.Matches(str, "(\\d{1,6})(\\w)"))
{
var amount = int.Parse(match.Groups[1].Value);
var type = match.Groups[2].Value;
if (type == "w") d += Duration.FromDays(7) * amount;
else if (type == "d") d += Duration.FromDays(1) * amount;
else if (type == "h") d += Duration.FromHours(1) * amount;
else if (type == "m") d += Duration.FromMinutes(1) * amount;
else if (type == "s") d += Duration.FromSeconds(1) * amount;
else return null;
}
if (d == Duration.Zero) return null;
return d;
}
public static LocalDate? ParseDate(string str, bool allowNullYear = false)
{
// NodaTime can't parse constructs like "1st" and "2nd" so we quietly replace those away
// Gotta make sure to do the regex otherwise we'll catch things like the "st" in "August" too
str = Regex.Replace(str, "(\\d+)(st|nd|rd|th)", "$1");
var patterns = new[]
{
"MMM d yyyy", // Jan 1 2019
"MMM d, yyyy", // Jan 1, 2019
"MMMM d yyyy", // January 1 2019
"MMMM d, yyyy", // January 1, 2019
"yyyy-MM-dd", // 2019-01-01
"yyyy MM dd", // 2019 01 01
"yyyy/MM/dd" // 2019/01/01
}.ToList();
if (allowNullYear) patterns.AddRange(new[]
{
"MMM d", // Jan 1
"MMMM d", // January 1
"MM-dd", // 01-01
"MM dd", // 01 01
"MM/dd" // 01/01
});
// Giving a template value so year will be parsed as 0001 if not present
// This means we can later disambiguate whether a null year was given
// TODO: should we be using invariant culture here?
foreach (var pattern in patterns.Select(p => LocalDatePattern.CreateWithInvariantCulture(p).WithTemplateValue(new LocalDate(0001, 1, 1))))
{
var result = pattern.Parse(str);
if (result.Success) return result.Value;
}
return null;
}
public static ZonedDateTime? ParseDateTime(string str, bool nudgeToPast = false, DateTimeZone zone = null)
{
if (zone == null) zone = DateTimeZone.Utc;
// 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)
// Should yield a <current *local @ zone* date> 12:00:00 AM.
var now = SystemClock.Instance.GetCurrentInstant().InZone(zone).LocalDateTime;
var midnight = now.Date.AtMidnight();
// First we try to parse the string as a relative time using the period parser
var relResult = ParsePeriod(str);
if (relResult != null)
{
// if we can, we just subtract that amount from the
return now.InZoneLeniently(zone).Minus(relResult.Value);
}
var timePatterns = new[]
{
"H:mm", // 4:30
"HH:mm", // 23:30
"H:mm:ss", // 4:30:29
"HH:mm:ss", // 23:30:29
"h tt", // 2 PM
"htt", // 2PM
"h:mm tt", // 4:30 PM
"h:mmtt", // 4:30PM
"h:mm:ss tt", // 4:30:29 PM
"h:mm:sstt", // 4:30:29PM
"hh:mm tt", // 11:30 PM
"hh:mmtt", // 11:30PM
"hh:mm:ss tt", // 11:30:29 PM
"hh:mm:sstt" // 11:30:29PM
};
var datePatterns = new[]
{
"MMM d yyyy", // Jan 1 2019
"MMM d, yyyy", // Jan 1, 2019
"MMMM d yyyy", // January 1 2019
"MMMM d, yyyy", // January 1, 2019
"yyyy-MM-dd", // 2019-01-01
"yyyy MM dd", // 2019 01 01
"yyyy/MM/dd", // 2019/01/01
"MMM d", // Jan 1
"MMMM d", // January 1
"MM-dd", // 01-01
"MM dd", // 01 01
"MM/dd" // 01-01
};
// First, we try all the timestamps that only have a time
foreach (var timePattern in timePatterns)
{
var pat = LocalDateTimePattern.CreateWithInvariantCulture(timePattern).WithTemplateValue(midnight);
var result = pat.Parse(str);
if (result.Success)
{
// If we have a successful match and we need a time in the past, we try to shove a future-time a date before
// Example: "4:30 pm" at 3:30 pm likely refers to 4:30 pm the previous day
var val = result.Value;
// If we need to nudge, we just subtract a day. This only occurs when we're parsing specifically *just time*, so
// we know we won't nudge it by more than a day since we use today's midnight timestamp as a date template.
// Since this is a naive datetime, this ensures we're actually moving by one calendar day even if
// DST changes occur, since they'll be resolved later wrt. the right side of the boundary
if (val > now && nudgeToPast) val = val.PlusDays(-1);
return val.InZoneLeniently(zone);
}
}
// Then we try specific date+time combinations, both date first and time first, with and without commas
foreach (var timePattern in timePatterns)
{
foreach (var datePattern in datePatterns)
{
foreach (var patternStr in new[]
{
$"{timePattern}, {datePattern}", $"{datePattern}, {timePattern}",
$"{timePattern} {datePattern}", $"{datePattern} {timePattern}"
})
{
var pattern = LocalDateTimePattern.CreateWithInvariantCulture(patternStr).WithTemplateValue(midnight);
var res = pattern.Parse(str);
if (res.Success) return res.Value.InZoneLeniently(zone);
}
}
}
// Finally, just date patterns, still using midnight as the template
foreach (var datePattern in datePatterns)
{
var pat = LocalDateTimePattern.CreateWithInvariantCulture(datePattern).WithTemplateValue(midnight);
var res = pat.Parse(str);
if (res.Success) return res.Value.InZoneLeniently(zone);
}
// Still haven't parsed something, we just give up lmao
return null;
}
public static string ExtractCountryFlag(string flag)
{
if (flag.Length != 4) return null;
try
{
var cp1 = char.ConvertToUtf32(flag, 0);
var cp2 = char.ConvertToUtf32(flag, 2);
if (cp1 < 0x1F1E6 || cp1 > 0x1F1FF) return null;
if (cp2 < 0x1F1E6 || cp2 > 0x1F1FF) return null;
return $"{(char) (cp1 - 0x1F1E6 + 'A')}{(char) (cp2 - 0x1F1E6 + 'A')}";
}
catch (ArgumentException)
{
return null;
}
}
public static IEnumerable<T> TakeWhileIncluding<T>(this IEnumerable<T> list, Func<T, bool> predicate)
{
// modified from https://stackoverflow.com/a/6817553
foreach(var el in list)
{
yield return el;
if (!predicate(el))
yield break;
}
}
public static string NullIfEmpty(this string input)
{
return input.Trim().Length == 0 ? null : input;
}
}
public static class Emojis {
public static readonly string Warn = "\u26A0";
public static readonly string Success = "\u2705";
public static readonly string Error = "\u274C";
public static readonly string Note = "\U0001f4dd";
public static readonly string ThumbsUp = "\U0001f44d";
public static readonly string RedQuestion = "\u2753";
}
public static class Formats
{
public static IPattern<Instant> TimestampExportFormat = InstantPattern.CreateWithInvariantCulture("g");
public static IPattern<LocalDate> DateExportFormat = LocalDatePattern.CreateWithInvariantCulture("yyyy-MM-dd");
// We create a composite pattern that only shows the two most significant things
// eg. if we have something with nonzero day component, we show <x>d <x>h, but if it's
// a smaller duration we may only bother with showing <x>h <x>m or <x>m <x>s
public static IPattern<Duration> DurationFormat = new CompositePatternBuilder<Duration>
{
{DurationPattern.CreateWithInvariantCulture("s's'"), d => true},
{DurationPattern.CreateWithInvariantCulture("m'm' s's'"), d => d.Minutes > 0},
{DurationPattern.CreateWithInvariantCulture("H'h' m'm'"), d => d.Hours > 0},
{DurationPattern.CreateWithInvariantCulture("D'd' h'h'"), d => d.Days > 0}
}.Build();
public static IPattern<LocalDateTime> LocalDateTimeFormat = LocalDateTimePattern.CreateWithInvariantCulture("yyyy-MM-dd HH:mm:ss");
public static IPattern<ZonedDateTime> ZonedDateTimeFormat = ZonedDateTimePattern.CreateWithInvariantCulture("yyyy-MM-dd HH:mm:ss x", DateTimeZoneProviders.Tzdb);
}
public static class InitUtils
{
public static IConfigurationBuilder BuildConfiguration(string[] args) => new ConfigurationBuilder()
.SetBasePath(Directory.GetCurrentDirectory())
.AddJsonFile("pluralkit.conf", true)
.AddEnvironmentVariables()
.AddCommandLine(args);
public static void Init()
{
InitDatabase();
}
private static void InitDatabase()
{
// Dapper by default tries to pass ulongs to Npgsql, which rejects them since PostgreSQL technically
// doesn't support unsigned types on its own.
// Instead we add a custom mapper to encode them as signed integers instead, converting them back and forth.
SqlMapper.RemoveTypeMap(typeof(ulong));
SqlMapper.AddTypeHandler<ulong>(new UlongEncodeAsLongHandler());
Dapper.DefaultTypeMap.MatchNamesWithUnderscores = true;
// Also, use NodaTime. it's good.
NpgsqlConnection.GlobalTypeMapper.UseNodaTime();
// With the thing we add above, Npgsql already handles NodaTime integration
// This makes Dapper confused since it thinks it has to convert it anyway and doesn't understand the types
// So we add a custom type handler that literally just passes the type through to Npgsql
SqlMapper.AddTypeHandler(new PassthroughTypeHandler<Instant>());
SqlMapper.AddTypeHandler(new PassthroughTypeHandler<LocalDate>());
}
public static ILogger InitLogger(CoreConfig config, string component)
{
return new LoggerConfiguration()
.ConfigureForNodaTime(DateTimeZoneProviders.Tzdb)
.MinimumLevel.Debug()
.WriteTo.File(
new RenderedCompactJsonFormatter(),
(config.LogDir ?? "logs") + $"/pluralkit.{component}.log",
rollingInterval: RollingInterval.Day,
flushToDiskInterval: TimeSpan.FromSeconds(10),
restrictedToMinimumLevel: LogEventLevel.Information,
buffered: true)
.WriteTo.Console(theme: AnsiConsoleTheme.Code, outputTemplate:"[{Timestamp:HH:mm:ss}] [{EventId}] {Level:u3} {Message:lj}{NewLine}{Exception}")
.CreateLogger();
}
public static IMetrics InitMetrics(CoreConfig config, string onlyContext = null)
{
var builder = AppMetrics.CreateDefaultBuilder();
if (config.InfluxUrl != null && config.InfluxDb != null)
builder.Report.ToInfluxDb(config.InfluxUrl, config.InfluxDb);
if (onlyContext != null)
builder.Filter.ByIncludingOnlyContext(onlyContext);
return builder.Build();
}
public static JsonSerializerSettings BuildSerializerSettings() => new JsonSerializerSettings().BuildSerializerSettings();
public static JsonSerializerSettings BuildSerializerSettings(this JsonSerializerSettings settings)
{
settings.ConfigureForNodaTime(DateTimeZoneProviders.Tzdb);
return settings;
}
}
public class LoggerProvider
{
private CoreConfig _config;
public ILogger RootLogger { get; }
public LoggerProvider(CoreConfig config, string component)
{
_config = config;
RootLogger = InitUtils.InitLogger(_config, component);
}
}
public class UlongEncodeAsLongHandler : SqlMapper.TypeHandler<ulong>
{
public override ulong Parse(object value)
{
// Cast to long to unbox, then to ulong (???)
return (ulong)(long)value;
}
public override void SetValue(IDbDataParameter parameter, ulong value)
{
parameter.Value = (long)value;
}
}
public class PassthroughTypeHandler<T> : SqlMapper.TypeHandler<T>
{
public override void SetValue(IDbDataParameter parameter, T value)
{
parameter.Value = value;
}
public override T Parse(object value)
{
return (T) value;
}
}
public class DbConnectionFactory
{
private CoreConfig _config;
private ILogger _logger;
private IMetrics _metrics;
private DbConnectionCountHolder _countHolder;
public DbConnectionFactory(CoreConfig config, DbConnectionCountHolder countHolder, ILogger logger, IMetrics metrics)
{
_config = config;
_countHolder = countHolder;
_metrics = metrics;
_logger = logger;
}
public async Task<IDbConnection> Obtain()
{
// Mark the request (for a handle, I guess) in the metrics
_metrics.Measure.Meter.Mark(CoreMetrics.DatabaseRequests);
// Actually create and try to open the connection
var conn = new NpgsqlConnection(_config.Database);
await conn.OpenAsync();
// Increment the count
_countHolder.Increment();
// Return a wrapped connection which will decrement the counter on dispose
return new PerformanceTrackingConnection(conn, _countHolder, _logger, _metrics);
}
}
public class DbConnectionCountHolder
{
private int _connectionCount;
public int ConnectionCount => _connectionCount;
public void Increment()
{
Interlocked.Increment(ref _connectionCount);
}
public void Decrement()
{
Interlocked.Decrement(ref _connectionCount);
}
}
public class PerformanceTrackingConnection: IDbConnection
{
// Simple delegation of everything.
private NpgsqlConnection _impl;
private DbConnectionCountHolder _countHolder;
private ILogger _logger;
private IMetrics _metrics;
public PerformanceTrackingConnection(NpgsqlConnection impl, DbConnectionCountHolder countHolder,
ILogger logger, IMetrics metrics)
{
_impl = impl;
_countHolder = countHolder;
_logger = logger;
_metrics = metrics;
}
public void Dispose()
{
_impl.Dispose();
_countHolder.Decrement();
}
public IDbTransaction BeginTransaction()
{
return _impl.BeginTransaction();
}
public IDbTransaction BeginTransaction(IsolationLevel il)
{
return _impl.BeginTransaction(il);
}
public void ChangeDatabase(string databaseName)
{
_impl.ChangeDatabase(databaseName);
}
public void Close()
{
_impl.Close();
}
public IDbCommand CreateCommand()
{
return new PerformanceTrackingCommand(_impl.CreateCommand(), _logger, _metrics);
}
public void Open()
{
_impl.Open();
}
public NpgsqlBinaryImporter BeginBinaryImport(string copyFromCommand)
{
return _impl.BeginBinaryImport(copyFromCommand);
}
public string ConnectionString
{
get => _impl.ConnectionString;
set => _impl.ConnectionString = value;
}
public int ConnectionTimeout => _impl.ConnectionTimeout;
public string Database => _impl.Database;
public ConnectionState State => _impl.State;
}
public class PerformanceTrackingCommand : DbCommand
{
private NpgsqlCommand _impl;
private ILogger _logger;
private IMetrics _metrics;
public PerformanceTrackingCommand(NpgsqlCommand impl, ILogger logger, IMetrics metrics)
{
_impl = impl;
_metrics = metrics;
_logger = logger;
}
public override void Cancel()
{
_impl.Cancel();
}
public override int ExecuteNonQuery()
{
return _impl.ExecuteNonQuery();
}
public override object ExecuteScalar()
{
return _impl.ExecuteScalar();
}
public override void Prepare()
{
_impl.Prepare();
}
public override string CommandText
{
get => _impl.CommandText;
set => _impl.CommandText = value;
}
public override int CommandTimeout
{
get => _impl.CommandTimeout;
set => _impl.CommandTimeout = value;
}
public override CommandType CommandType
{
get => _impl.CommandType;
set => _impl.CommandType = value;
}
public override UpdateRowSource UpdatedRowSource
{
get => _impl.UpdatedRowSource;
set => _impl.UpdatedRowSource = value;
}
protected override DbConnection DbConnection
{
get => _impl.Connection;
set => _impl.Connection = (NpgsqlConnection) value;
}
protected override DbParameterCollection DbParameterCollection => _impl.Parameters;
protected override DbTransaction DbTransaction
{
get => _impl.Transaction;
set => _impl.Transaction = (NpgsqlTransaction) value;
}
public override bool DesignTimeVisible
{
get => _impl.DesignTimeVisible;
set => _impl.DesignTimeVisible = value;
}
protected override DbParameter CreateDbParameter()
{
return _impl.CreateParameter();
}
protected override DbDataReader ExecuteDbDataReader(CommandBehavior behavior)
{
return _impl.ExecuteReader(behavior);
}
private IDisposable LogQuery()
{
return new QueryLogger(_logger, _metrics, CommandText);
}
protected override async Task<DbDataReader> ExecuteDbDataReaderAsync(CommandBehavior behavior, CancellationToken cancellationToken)
{
using (LogQuery())
return await _impl.ExecuteReaderAsync(behavior, cancellationToken);
}
public override async Task<int> ExecuteNonQueryAsync(CancellationToken cancellationToken)
{
using (LogQuery())
return await _impl.ExecuteNonQueryAsync(cancellationToken);
}
public override async Task<object> ExecuteScalarAsync(CancellationToken cancellationToken)
{
using (LogQuery())
return await _impl.ExecuteScalarAsync(cancellationToken);
}
}
public class QueryLogger : IDisposable
{
private ILogger _logger;
private IMetrics _metrics;
private string _commandText;
private Stopwatch _stopwatch;
public QueryLogger(ILogger logger, IMetrics metrics, string commandText)
{
_metrics = metrics;
_commandText = commandText;
_logger = logger;
_stopwatch = new Stopwatch();
_stopwatch.Start();
}
public void Dispose()
{
_stopwatch.Stop();
_logger.Debug("Executed query {Query} in {ElapsedTime}", _commandText, _stopwatch.Elapsed);
// One tick is 100 nanoseconds
_metrics.Provider.Timer.Instance(CoreMetrics.DatabaseQuery, new MetricTags("query", _commandText))
.Record(_stopwatch.ElapsedTicks / 10, TimeUnit.Microseconds, _commandText);
}
}
public class EventIdProvider
{
public Guid EventId { get; }
public EventIdProvider()
{
EventId = Guid.NewGuid();
}
}
}