67 lines
2.3 KiB
C#
67 lines
2.3 KiB
C#
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using Discord.Commands;
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using NadekoBot.Extensions;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Reflection;
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using System.Threading.Tasks;
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using NadekoBot.Common.Attributes;
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namespace NadekoBot.Modules.Utility
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{
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public partial class Utility
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{
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[Group]
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public class CalcCommands : NadekoSubmodule
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{
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[NadekoCommand, Usage, Description, Aliases]
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public async Task Calculate([Remainder] string expression)
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{
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var expr = new NCalc.Expression(expression, NCalc.EvaluateOptions.IgnoreCase);
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expr.EvaluateParameter += Expr_EvaluateParameter;
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var result = expr.Evaluate();
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if (expr.Error == null)
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await Context.Channel.SendConfirmAsync("⚙ " + GetText("result"), result.ToString());
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else
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await Context.Channel.SendErrorAsync("⚙ " + GetText("error"), expr.Error);
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}
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private static void Expr_EvaluateParameter(string name, NCalc.ParameterArgs args)
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{
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switch (name.ToLowerInvariant())
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{
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case "pi":
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args.Result = Math.PI;
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break;
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case "e":
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args.Result = Math.E;
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break;
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}
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}
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[NadekoCommand, Usage, Description, Aliases]
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public async Task CalcOps()
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{
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var selection = typeof(Math).GetTypeInfo()
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.GetMethods()
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.Distinct(new MethodInfoEqualityComparer())
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.Select(x => x.Name)
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.Except(new[]
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{
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"ToString",
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"Equals",
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"GetHashCode",
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"GetType"
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});
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await Context.Channel.SendConfirmAsync(GetText("calcops", Prefix), string.Join(", ", selection));
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}
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}
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private class MethodInfoEqualityComparer : IEqualityComparer<MethodInfo>
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{
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public bool Equals(MethodInfo x, MethodInfo y) => x.Name == y.Name;
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public int GetHashCode(MethodInfo obj) => obj.Name.GetHashCode();
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}
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}
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}
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