public override async Task <TypeReaderResult> ReadAsync(ICommandContext context, string input, IServiceProvider services)
{
var baseResult = await base.ReadAsync(context, input, services);
if (baseResult.IsSuccess)
{
return(TypeReaderResult.FromSuccess(DiscordUserEntity.FromIUser(baseResult.BestMatch as IUser)));
}
if (ulong.TryParse(input, out var uid))
{
//Any ulong is technically a valid snowflake, but we try to do some basic validation
//by parsing the timestamp (in ms) part out of it - we consider it to be an invalid snowflake if:
// - it's less than or equal to the discord epoch baseline
// - it's greater than or equal to the current timestamp
var snowflakeTimestamp = (long)(uid >> 22);
const long discordEpochUnixTime = 1420070400000;
//Jan 1, 2015
var discordEpoch = DateTimeOffset.FromUnixTimeMilliseconds(discordEpochUnixTime);
//The supposed timestamp
var snowFlakeDateTime = DateTimeOffset.FromUnixTimeMilliseconds(snowflakeTimestamp + discordEpochUnixTime);
if (snowFlakeDateTime <= discordEpoch || snowFlakeDateTime >= DateTimeOffset.UtcNow)
{
return(TypeReaderResult.FromError(CommandError.ParseFailed, "Snowflake was almost certainly invalid."));
}
return(TypeReaderResult.FromSuccess(new DiscordUserEntity(uid)));
}
return(TypeReaderResult.FromError(CommandError.ParseFailed, "Could not find user / parse user ID"));
}
public override async Task <TypeReaderResult> ReadAsync(ICommandContext context, string input, IServiceProvider services)
{
var baseResult = await base.ReadAsync(context, input, services);
if (baseResult.IsSuccess)
{
return(TypeReaderResult.FromSuccess(DiscordUserEntity.FromIUser(baseResult.BestMatch as IUser)));
}
if (ulong.TryParse(input, out var uid))
{
//Any ulong is technically a valid snowflake, but we try to do some basic validation
//by parsing the timestamp (in ms) part out of it - if it's less than or equal to 0, it's
//before the Discord epoch of Jan 1, 2015, and thus invalid
var snowflakeTimestamp = (long)(uid >> 22);
if (snowflakeTimestamp <= 0)
{
return(TypeReaderResult.FromError(CommandError.ParseFailed, "Snowflake was almost certainly invalid."));
}
return(TypeReaderResult.FromSuccess(new DiscordUserEntity(uid)));
}
return(TypeReaderResult.FromError(CommandError.ParseFailed, "Could not find user / parse user ID"));
}
public override async Task <TypeReaderResult> ReadAsync(ICommandContext context, string input, IServiceProvider services)
{
var baseResult = await base.ReadAsync(context, input, services);
if (baseResult.IsSuccess)
{
return(TypeReaderResult.FromSuccess(DiscordUserEntity.FromIUser(baseResult.BestMatch as IUser)));
}
if (ulong.TryParse(input, out var uid) || MentionUtils.TryParseUser(input, out uid))
{
if (!SnowflakeUtilities.IsValidSnowflake(uid))
{
return(TypeReaderResult.FromError(CommandError.ParseFailed, "Snowflake was almost certainly invalid."));
}
return(TypeReaderResult.FromSuccess(new DiscordUserEntity(uid)));
}
return(TypeReaderResult.FromError(CommandError.ParseFailed, "Could not find user / parse user ID"));
}
