Merge pull request #176 from tg44/converter

Converter feature, closes #158

NadekoBot/Modules/Search/Commands/ConverterCommand.cs

@@ -0,0 +1,162 @@
+using Discord.Commands;
+using NadekoBot.Commands;
+using ScaredFingers.UnitsConversion;
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace NadekoBot.Modules.Search.Commands
+{
+    class ConverterCommand : DiscordCommand
+    {
+
+        public ConverterCommand(DiscordModule module) : base(module)
+        {
+            if (unitTables == null)
+            {
+                CultureInfo ci = new CultureInfo("en-US");
+                Thread.CurrentThread.CurrentCulture = ci;
+                unitTables = new List<UnitTable>();
+                unitTables.Add(UnitTable.LengthTable);
+                unitTables.Add(UnitTable.TemperatureTable);
+                unitTables.Add(UnitTable.VolumeTable);
+                unitTables.Add(UnitTable.WeightTable);
+                reInitCurrencyConverterTable();
+            }
+
+        }
+
+
+        internal override void Init(CommandGroupBuilder cgb)
+        {
+            cgb.CreateCommand(Module.Prefix + "convert")
+                .Description("Convert quantities from>to. Like `~convert m>km 1000`")
+                .Parameter("from-to", ParameterType.Required)
+                .Parameter("quantity", ParameterType.Optional)
+                .Do(ConvertFunc());
+            cgb.CreateCommand(Module.Prefix + "convertlist")
+                .Description("List of the convertable dimensions and currencies.")
+                .Do(ConvertListFunc());
+        }
+
+        private Func<CommandEventArgs, Task> ConvertListFunc() =>
+            async e =>
+            {
+                reInitCurrencyConverterTable();
+                string msg = "";
+                foreach (var tmpTable in unitTables)
+                {
+                    int i = 1;
+                    while (tmpTable.IsKnownUnit(i))
+                    {
+                        msg += tmpTable.GetUnitName(i) + " (" + tmpTable.GetUnitSymbol(i) + "); ";
+                        i++;
+                    }
+                    msg += "\n";
+                }
+                foreach (var curr in exchangeRateProvider.Currencies)
+                {
+                    msg += curr + "; ";
+                }
+
+                await e.Channel.SendMessage(msg);
+            };
+
+        private Func<CommandEventArgs, Task> ConvertFunc() =>
+            async e =>
+            {
+                try
+                {
+                    await e.Channel.SendIsTyping();
+
+                    string from = e.GetArg("from-to").ToLowerInvariant().Split('>')[0];
+                    string to = e.GetArg("from-to").ToLowerInvariant().Split('>')[1];
+
+                    float quantity = 1.0f;
+                    if (!float.TryParse(e.GetArg("quantity"), out quantity))
+                    {
+                        quantity = 1.0f;
+                    }
+
+                    int fromCode, toCode = 0;
+                    UnitTable table = null;
+                    ResolveUnitCodes(from, to, out table, out fromCode, out toCode);
+
+                    if (table != null)
+                    {
+                        Unit inUnit = new Unit(fromCode, quantity, table);
+                        Unit outUnit = inUnit.Convert(toCode);
+                        await e.Channel.SendMessage(inUnit.ToString() + " = " + outUnit.ToString());
+                    }
+                    else
+                    {
+                        reInitCurrencyConverterTable();
+                        Unit inUnit = currTable.CreateUnit(quantity, from.ToUpperInvariant());
+                        Unit outUnit = inUnit.Convert(currTable.CurrencyCode(to.ToUpperInvariant()));
+                        await e.Channel.SendMessage(inUnit.ToString() + " = " + outUnit.ToString());
+                    }
+                }
+                catch //(Exception ex)
+                {
+                    //Console.WriteLine(ex.ToString());
+                    await e.Channel.SendMessage("Bad input format, or sth went wrong... Try to list them with `" + Module.Prefix + "`convertlist");
+                }
+            };
+
+        private void reInitCurrencyConverterTable()
+        {
+            if (lastChanged == null || lastChanged.DayOfYear != DateTime.Now.DayOfYear)
+            {
+                exchangeRateProvider = new WebExchangeRatesProvider();
+                currTable = new CurrencyExchangeTable(exchangeRateProvider);
+                lastChanged = DateTime.Now;
+            }
+        }
+
+        private void ResolveUnitCodes(string from, string to, out UnitTable table, out int fromCode, out int toCode)
+        {
+            foreach (var tmpTable in unitTables)
+            {
+                int f = LookupUnit(tmpTable, from);
+                int t = LookupUnit(tmpTable, to);
+                if (f > 0 && t > 0)
+                {
+                    table = tmpTable;
+                    fromCode = f;
+                    toCode = t;
+                    return;
+                }
+            }
+            table = null;
+            fromCode = 0;
+            toCode = 0;
+        }
+
+        private int LookupUnit(UnitTable table, string lookup)
+        {
+            string wellformedLookup = lookup.ToLowerInvariant().Replace("°", "");
+            int i = 1;
+            while (table.IsKnownUnit(i))
+            {
+                if (wellformedLookup == table.GetUnitName(i).ToLowerInvariant().Replace("°", "") ||
+                    wellformedLookup == table.GetUnitPlural(i).ToLowerInvariant().Replace("°", "") ||
+                    wellformedLookup == table.GetUnitSymbol(i).ToLowerInvariant().Replace("°", ""))
+                {
+                    return i;
+                }
+                i++;
+            }
+            return 0;
+        }
+
+        private static List<UnitTable> unitTables;
+
+        private static CurrencyExchangeRatesProvider exchangeRateProvider;
+
+        private static CurrencyExchangeTable currTable;
+
+        private static DateTime lastChanged;
+    }
+}

NadekoBot/Modules/Searches.cs

@@ -5,6 +5,7 @@ using NadekoBot.Classes.IMDB;
 using NadekoBot.Classes.JSONModels;
 using NadekoBot.Commands;
 using NadekoBot.Extensions;
+using NadekoBot.Modules.Search.Commands;
 using Newtonsoft.Json;
 using Newtonsoft.Json.Linq;
 using System;
@@ -23,6 +24,7 @@ namespace NadekoBot.Modules
         {
             commands.Add(new LoLCommands(this));
             commands.Add(new StreamNotifications(this));
+            commands.Add(new ConverterCommand(this));
             rng = new Random();
         }
 

NadekoBot/NadekoBot.csproj

@@ -97,6 +97,10 @@
       <HintPath>..\packages\RestSharp.105.2.3\lib\net452\RestSharp.dll</HintPath>
       <Private>True</Private>
     </Reference>
+    <Reference Include="ScaredFingers.UnitsConversion, Version=1.0.0.0, Culture=neutral, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>lib\ScaredFingers.UnitsConversion.dll</HintPath>
+    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
     <Reference Include="System.Drawing" />
@@ -219,6 +223,7 @@
     <Compile Include="Modules\Pokemon\PokemonTypes\NormalType.cs" />
     <Compile Include="Modules\Pokemon\PokeStats.cs" />
     <Compile Include="Modules\Searches.cs" />
+    <Compile Include="Modules\Search\Commands\ConverterCommand.cs" />
     <Compile Include="Modules\Translator\Helpers\GoogleTranslator.cs" />
     <Compile Include="Modules\Translator\TranslateCommand.cs" />
     <Compile Include="Modules\Translator\TranslatorModule.cs" />
@@ -480,6 +485,10 @@
       <Name>Discord.Net</Name>
     </ProjectReference>
   </ItemGroup>
+  <ItemGroup>
+    <Content Include="lib\ScaredFingers.UnitsConversion.dll" />
+  </ItemGroup>
+  <ItemGroup />
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.