Added a .stock command

src/NadekoBot/.editorconfig

@@ -81,8 +81,8 @@ csharp_style_expression_bodied_constructors = when_on_single_line:suggestion
 csharp_style_expression_bodied_indexers = true:suggestion
 csharp_style_expression_bodied_lambdas = true:suggestion
 csharp_style_expression_bodied_local_functions = true:suggestion
-csharp_style_expression_bodied_methods = when_on_single_line:warning
+csharp_style_expression_bodied_methods = when_on_single_line:suggestion
-csharp_style_expression_bodied_operators = when_on_single_line:warning
+csharp_style_expression_bodied_operators = when_on_single_line:suggestion
 csharp_style_expression_bodied_properties = true:suggestion
 
 # Pattern matching preferences

src/NadekoBot/Common/Creds.cs

@@ -63,6 +63,10 @@ Used only for .time command")]
     [Comment(@"https://pro.coinmarketcap.com/account/ api key. There is a free plan for personal use.
 Used for cryptocurrency related commands.")]
     public string CoinmarketcapApiKey { get; set; }
+    
+//     [Comment(@"https://polygon.io/dashboard/api-keys api key. Free plan allows for 5 queries per minute.
+// Used for stocks related commands.")]
+//     public string PolygonIoApiKey { get; set; }
 
     [Comment(@"Api key used for Osu related commands. Obtain this key at https://osu.ppy.sh/p/api")]
     public string OsuApiKey { get; set; }

src/NadekoBot/Modules/Searches/Crypto/CryptoCommands.cs

@@ -8,6 +8,110 @@ public partial class Searches
 {
     public partial class CryptoCommands : NadekoSubmodule<CryptoService>
     {
+        private readonly IStockDataService _stocksService;
+
+        public CryptoCommands(IStockDataService stocksService)
+        {
+            _stocksService = stocksService;
+        }
+        
+        [Cmd]
+        public async partial Task Stock([Leftover]string query)
+        {
+            if (!query.IsAlphaNumeric())
+                return;
+
+            using var typing = ctx.Channel.EnterTypingState();
+            
+            var stocks = await _stocksService.GetStockDataAsync(query);
+
+            if (stocks.Count == 0)
+            {
+                var symbols = await _stocksService.SearchSymbolAsync(query);
+
+                if (symbols.Count == 0)
+                {
+                    await ReplyErrorLocalizedAsync(strs.not_found);
+                    return;
+                }
+
+                var symbol = symbols.First();
+                var promptEmbed = _eb.Create()
+                                     .WithDescription(symbol.Description)
+                                     .WithTitle(GetText(strs.did_you_mean(symbol.Symbol)));
+                
+                if (!await PromptUserConfirmAsync(promptEmbed))
+                    return;
+
+                query = symbol.Symbol;
+                stocks = await _stocksService.GetStockDataAsync(query);
+
+                if (stocks.Count == 0)
+                {
+                    await ReplyErrorLocalizedAsync(strs.not_found);
+                    return;
+                }
+
+            }
+            
+            // try to find a ticker match
+            var stock = stocks.Count == 1
+                ? stocks.FirstOrDefault()
+                : stocks.FirstOrDefault(x => x.Ticker == query.ToUpperInvariant());
+            
+            if (stock is null)
+            {
+                var ebImprecise = _eb.Create()
+                                     .WithOkColor()
+                                     .WithTitle(GetText(strs.stocks_multiple_results))
+                                     .WithDescription(stocks.Take(20)
+                                                            .Select(s => $"{Format.Code(s.Ticker)} {s.Name.TrimTo(50)}")
+                                                            .Join('\n'));
+
+                await ctx.Channel.EmbedAsync(ebImprecise);
+                return;
+            }
+
+            var localCulture = (CultureInfo)Culture.Clone();
+            localCulture.NumberFormat.CurrencySymbol = "$";
+
+            var sign = stock.Price >= stock.Close
+                ? "\\🔼"
+                : "\\🔻";
+
+            var change = (stock.Price - stock.Close).ToString("N2", Culture);
+            var changePercent = (1 - (stock.Close / stock.Price)).ToString("P1", Culture);
+            
+            var sign50 = stock.Change50d >= 0
+                ? "\\🔼"
+                : "\\🔻";
+
+            var change50 = (stock.Change50d / 100).ToString("P1", Culture);
+            
+            var sign200 = stock.Change200d >= 0
+                ? "\\🔼"
+                : "\\🔻";
+            
+            var change200 = (stock.Change200d / 100).ToString("P1", Culture);
+            
+            var price = stock.Price.ToString("C2", localCulture);
+
+            var eb = _eb.Create()
+                        .WithOkColor()
+                        .WithAuthor(stock.Ticker)
+                        .WithTitle(stock.Name)
+                        .AddField(GetText(strs.price), $"{sign} **{price}**", true)
+                        .AddField(GetText(strs.market_cap), stock.MarketCap.ToString("C0", localCulture), true)
+                        .AddField(GetText(strs.volume_24h), stock.DailyVolume.ToString("C0", localCulture), true)
+                        .AddField("Change", $"{change} ({changePercent})", true)
+                        .AddField("Change 50d", $"{sign50}{change50}", true)
+                        .AddField("Change 200d", $"{sign200}{change200}", true)
+                        .WithFooter(stock.Exchange);
+            
+            await ctx.Channel.EmbedAsync(eb);
+        }
+        
+
         [Cmd]
         public async partial Task Crypto(string name)
         {

src/NadekoBot/Modules/Searches/Crypto/_Common/IStockDataService.cs

@@ -0,0 +1,7 @@
+namespace NadekoBot.Modules.Searches;
+
+public interface IStockDataService
+{
+    public Task<IReadOnlyCollection<StockData>> GetStockDataAsync(string query);
+    Task<IReadOnlyCollection<SymbolData>> SearchSymbolAsync(string query);
+}

src/NadekoBot/Modules/Searches/Crypto/_Common/Polygon/FinnHubSearchResponse.cs

@@ -0,0 +1,13 @@
+#nullable disable
+using System.Text.Json.Serialization;
+
+namespace NadekoBot.Modules.Searches;
+
+public class FinnHubSearchResponse
+{
+    [JsonPropertyName("count")]
+    public int Count { get; set; }
+
+    [JsonPropertyName("result")]
+    public List<FinnHubSearchResult> Result { get; set; }
+}

src/NadekoBot/Modules/Searches/Crypto/_Common/Polygon/FinnHubSearchResult.cs

@@ -0,0 +1,19 @@
+#nullable disable
+using System.Text.Json.Serialization;
+
+namespace NadekoBot.Modules.Searches;
+
+public class FinnHubSearchResult
+{
+    [JsonPropertyName("description")]
+    public string Description { get; set; }
+
+    [JsonPropertyName("displaySymbol")]
+    public string DisplaySymbol { get; set; }
+
+    [JsonPropertyName("symbol")]
+    public string Symbol { get; set; }
+
+    [JsonPropertyName("type")]
+    public string Type { get; set; }
+}

src/NadekoBot/Modules/Searches/Crypto/_Common/Polygon/PolygonApiClient.cs

@@ -0,0 +1,55 @@
+using System.Net.Http.Json;
+
+namespace NadekoBot.Modules.Searches;
+
+public sealed class PolygonApiClient : IDisposable
+{
+    private const string BASE_URL = "https://api.polygon.io/v3";
+    
+    private readonly HttpClient _httpClient;
+    private readonly string _apiKey;
+
+    public PolygonApiClient(HttpClient httpClient, string apiKey)
+    {
+        _httpClient = httpClient;
+        _apiKey = apiKey;
+    }
+    
+    public async Task<IReadOnlyCollection<PolygonTickerData>> TickersAsync(string? ticker = null, string? query = null)
+    {
+        if (string.IsNullOrWhiteSpace(query))
+            query = null; 
+        
+        if(query is not null)
+            query = Uri.EscapeDataString(query);
+        
+        var requestString = $"{BASE_URL}/reference/tickers"
+                            + "?type=CS"
+                            + "&active=true"
+                            + "&order=asc"
+                            + "&limit=1000"
+                            + $"&apiKey={_apiKey}";
+
+        if (!string.IsNullOrWhiteSpace(ticker))
+            requestString += $"&ticker={ticker}";
+        
+        if (!string.IsNullOrWhiteSpace(query))
+            requestString += $"&search={query}";
+
+
+        var response = await _httpClient.GetFromJsonAsync<PolygonTickerResponse>(requestString);
+
+        if (response is null)
+            return Array.Empty<PolygonTickerData>();
+
+        return response.Results;
+    }
+
+    // public async Task<PolygonTickerDetailsV3> TickerDetailsV3Async(string ticker)
+    // {
+    //     return new();
+    // }
+
+    public void Dispose()
+        => _httpClient.Dispose();
+}

src/NadekoBot/Modules/Searches/Crypto/_Common/Polygon/PolygonTickerData.cs

@@ -0,0 +1,43 @@
+#nullable disable
+using System.Text.Json.Serialization;
+
+namespace NadekoBot.Modules.Searches;
+
+public class PolygonTickerData
+{
+    [JsonPropertyName("ticker")]
+    public string Ticker { get; set; }
+
+    [JsonPropertyName("name")]
+    public string Name { get; set; }
+
+    [JsonPropertyName("market")]
+    public string Market { get; set; }
+
+    [JsonPropertyName("locale")]
+    public string Locale { get; set; }
+
+    [JsonPropertyName("primary_exchange")]
+    public string PrimaryExchange { get; set; }
+
+    [JsonPropertyName("type")]
+    public string Type { get; set; }
+
+    [JsonPropertyName("active")]
+    public bool Active { get; set; }
+
+    [JsonPropertyName("currency_name")]
+    public string CurrencyName { get; set; }
+
+    [JsonPropertyName("cik")]
+    public string Cik { get; set; }
+
+    [JsonPropertyName("composite_figi")]
+    public string CompositeFigi { get; set; }
+
+    [JsonPropertyName("share_class_figi")]
+    public string ShareClassFigi { get; set; }
+
+    [JsonPropertyName("last_updated_utc")]
+    public DateTime LastUpdatedUtc { get; set; }
+}

src/NadekoBot/Modules/Searches/Crypto/_Common/Polygon/PolygonTickerResponse.cs

@@ -0,0 +1,13 @@
+#nullable disable
+using System.Text.Json.Serialization;
+
+namespace NadekoBot.Modules.Searches;
+
+public class PolygonTickerResponse
+{
+    [JsonPropertyName("status")]
+    public string Status { get; set; }
+    
+    [JsonPropertyName("results")]
+    public List<PolygonTickerData> Results { get; set; }
+}

src/NadekoBot/Modules/Searches/Crypto/_Common/PolygonStockDataService.cs

@@ -0,0 +1,26 @@
+// namespace NadekoBot.Modules.Searches;
+//
+// public sealed class PolygonStockDataService : IStockDataService
+// {
+//     private readonly IHttpClientFactory _httpClientFactory;
+//     private readonly IBotCredsProvider _credsProvider;
+//
+//     public PolygonStockDataService(IHttpClientFactory httpClientFactory, IBotCredsProvider credsProvider)
+//     {
+//         _httpClientFactory = httpClientFactory;
+//         _credsProvider = credsProvider;
+//     }
+//
+//     public async Task<IReadOnlyCollection<StockData>> GetStockDataAsync(string? query = null)
+//     {
+//         using var httpClient = _httpClientFactory.CreateClient();
+//         using var client = new PolygonApiClient(httpClient, string.Empty);
+//         var data = await client.TickersAsync(query: query);
+//
+//         return data.Map(static x => new StockData()
+//         {
+//             Name = x.Name,
+//             Ticker = x.Ticker,
+//         });
+//     }
+// }

src/NadekoBot/Modules/Searches/Crypto/_Common/StockData.cs

@@ -0,0 +1,15 @@
+#nullable disable
+namespace NadekoBot.Modules.Searches;
+
+public class StockData
+{
+    public string Name { get; set; }
+    public string Ticker { get; set; }
+    public double Price { get; set; }
+    public long MarketCap { get; set; }
+    public double Close { get; set; }
+    public double Change50d { get; set; }
+    public double Change200d { get; set; }
+    public long DailyVolume { get; set; }
+    public string Exchange { get; set; }
+}

src/NadekoBot/Modules/Searches/Crypto/_Common/YahooFinanceStockDataService.cs

@@ -0,0 +1,83 @@
+using System.Net.Http.Json;
+using YahooFinanceApi;
+
+namespace NadekoBot.Modules.Searches;
+
+public sealed class DefaultStockDataService : IStockDataService, INService
+{
+    private readonly IHttpClientFactory _httpClientFactory;
+
+    public DefaultStockDataService(IHttpClientFactory httpClientFactory)
+    {
+        _httpClientFactory = httpClientFactory;
+    }
+    
+    public async Task<IReadOnlyCollection<StockData>> GetStockDataAsync(string query)
+    {
+        try
+        {
+            var symbols = await Yahoo.Symbols(query)
+                                     .Fields(Field.LongName,
+                                         Field.Symbol,
+                                         Field.RegularMarketPrice,
+                                         Field.RegularMarketPreviousClose,
+                                         Field.MarketCap,
+                                         Field.FiftyDayAverageChangePercent,
+                                         Field.TwoHundredDayAverageChangePercent,
+                                         Field.AverageDailyVolume10Day,
+                                         Field.FullExchangeName)
+                                     .QueryAsync();
+
+            return symbols
+                   .Select(static x => x.Value)
+                          .Select(static x => new StockData()
+                          {
+                              Name = x.LongName,
+                              Ticker = x.Symbol,
+                              Price = x.RegularMarketPrice,
+                              Close = x.RegularMarketPreviousClose,
+                              MarketCap = x.MarketCap,
+                              Change50d = x.FiftyDayAverageChangePercent,
+                              Change200d = x.TwoHundredDayAverageChangePercent,
+                              DailyVolume = x.AverageDailyVolume10Day,
+                              Exchange = x.FullExchangeName
+                          })
+                          .ToList();
+        }
+        catch (Exception ex)
+        {
+            // what the hell is this api exception
+            Log.Warning(ex, "Error getting stock data: {ErrorMessage}", ex.Message);
+            return Array.Empty<StockData>();
+        }
+    }
+
+    public Task<IReadOnlyCollection<SymbolData>> SearchSymbolAsync(string query)
+    {
+        return Task.FromResult<IReadOnlyCollection<SymbolData>>(Array.Empty<SymbolData>());
+        
+        // try
+        // {
+        //     query = Uri.EscapeDataString(query);
+        //     using var http = _httpClientFactory.CreateClient();
+        //     var response = await http.GetFromJsonAsync<FinnHubSearchResponse>($"https://finnhub.io/api/v1/search"
+        //                                                                       + $"?q={query}"
+        //                                                                       + $"&token=");
+        //
+        //     if (response is null)
+        //         return Array.Empty<SymbolData>();
+        //
+        //     return response.Result
+        //                    .Where(x => x.Type == "Common Stock")
+        //                    .Select(static x => new SymbolData(x.Symbol, x.Description))
+        //                    .ToList();
+        // }
+        // catch (Exception ex)
+        // {
+        //     Log.Warning(ex, "Error searching stock symbol: {ErrorMessage}", ex.Message);
+        //     return Array.Empty<SymbolData>();
+        // }
+    }
+}
+
+public record SymbolData(string Symbol, string Description);

src/NadekoBot/NadekoBot.csproj

@@ -19,61 +19,64 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="AngleSharp" Version="0.16.1"/>
+        <PackageReference Include="AngleSharp" Version="0.16.1" />
-        <PackageReference Include="AWSSDK.S3" Version="3.7.7.10"/>
+        <PackageReference Include="AWSSDK.S3" Version="3.7.7.10" />
-        <PackageReference Include="CodeHollow.FeedReader" Version="1.2.2"/>
+        <PackageReference Include="CodeHollow.FeedReader" Version="1.2.2" />
-        <PackageReference Include="CommandLineParser" Version="2.8.0"/>
+        <PackageReference Include="CommandLineParser" Version="2.8.0" />
-        <PackageReference Include="Discord.Net" Version="3.1.0"/>
+        <PackageReference Include="Discord.Net" Version="3.1.0" />
-        <PackageReference Include="CoreCLR-NCalc" Version="2.2.92"/>
+        <PackageReference Include="CoreCLR-NCalc" Version="2.2.92" />
-        <PackageReference Include="Google.Apis.Urlshortener.v1" Version="1.41.1.138"/>
+        <PackageReference Include="Google.Apis.Urlshortener.v1" Version="1.41.1.138" />
-        <PackageReference Include="Google.Apis.YouTube.v3" Version="1.55.0.2449"/>
+        <PackageReference Include="Google.Apis.YouTube.v3" Version="1.55.0.2449" />
-        <PackageReference Include="Google.Apis.Customsearch.v1" Version="1.49.0.2084"/>
+        <PackageReference Include="Google.Apis.Customsearch.v1" Version="1.49.0.2084" />
-        <PackageReference Include="Google.Protobuf" Version="3.19.2"/>
+        <PackageReference Include="Google.Protobuf" Version="3.19.2" />
-        <PackageReference Include="Grpc.Net.ClientFactory" Version="2.41.0"/>
+        <PackageReference Include="Grpc.Net.ClientFactory" Version="2.41.0" />
         <PackageReference Include="Grpc.Tools" Version="2.43.0">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
-        <PackageReference Include="Html2Markdown" Version="5.0.1.524"/>
+        <PackageReference Include="Html2Markdown" Version="5.0.1.524" />
-        <PackageReference Include="Microsoft.EntityFrameworkCore" Version="6.0.1"/>
+        <PackageReference Include="Microsoft.EntityFrameworkCore" Version="6.0.1" />
         <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="6.0.1">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
-        <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="6.0.1"/>
+        <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="6.0.1" />
-        <PackageReference Include="Microsoft.Extensions.Configuration" Version="6.0.0"/>
+        <PackageReference Include="Microsoft.Extensions.Configuration" Version="6.0.0" />
-        <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="6.0.0"/>
+        <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="6.0.0" />
-        <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="6.0.0"/>
+        <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="6.0.0" />
-        <PackageReference Include="NetEscapades.Configuration.Yaml" Version="2.1.0"/>
+        <PackageReference Include="NetEscapades.Configuration.Yaml" Version="2.1.0" />
-        <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="6.0.0"/>
+        <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="6.0.0" />
-        <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="6.0.0"/>
+        <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="6.0.0" />
-        <PackageReference Include="Microsoft.Extensions.Http" Version="6.0.0"/>
+        <PackageReference Include="Microsoft.Extensions.Http" Version="6.0.0" />
-        <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="6.0.0"/>
+        <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="6.0.0" />
-        <PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="6.0.0"/>
+        <PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="6.0.0" />
-        <PackageReference Include="Microsoft.SyndicationFeed.ReaderWriter" Version="1.0.2"/>
+        <PackageReference Include="Microsoft.SyndicationFeed.ReaderWriter" Version="1.0.2" />
-        <PackageReference Include="Newtonsoft.Json" Version="13.0.1"/>
+        <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
-        <PackageReference Include="Scrutor" Version="3.3.0"/>
+        <PackageReference Include="Scrutor" Version="3.3.0" />
-        <PackageReference Include="Serilog.Sinks.Console" Version="4.0.1"/>
+        <PackageReference Include="Serilog.Sinks.Console" Version="4.0.1" />
-        <PackageReference Include="Serilog.Sinks.Seq" Version="5.1.0"/>
+        <PackageReference Include="Serilog.Sinks.Seq" Version="5.1.0" />
-        <PackageReference Include="SixLabors.ImageSharp" Version="1.0.4"/>
+        <PackageReference Include="SixLabors.ImageSharp" Version="1.0.4" />
-        <PackageReference Include="SixLabors.ImageSharp.Drawing" Version="1.0.0-beta0010"/>
+        <PackageReference Include="SixLabors.ImageSharp.Drawing" Version="1.0.0-beta0010" />
-        <PackageReference Include="StackExchange.Redis" Version="2.2.88"/>
+        <PackageReference Include="StackExchange.Redis" Version="2.2.88" />
-        <PackageReference Include="YamlDotNet" Version="11.2.1"/>
+        <PackageReference Include="YamlDotNet" Version="11.2.1" />
-        <PackageReference Include="linq2db.EntityFrameworkCore" Version="6.6.1"/>
+        <PackageReference Include="linq2db.EntityFrameworkCore" Version="6.6.1" />
-        <PackageReference Include="Humanizer" Version="2.13.14"/>
+        <PackageReference Include="Humanizer" Version="2.13.14" />
-        <PackageReference Include="JetBrains.Annotations" Version="2021.3.0"/>
+        <PackageReference Include="JetBrains.Annotations" Version="2021.3.0" />
         
 		<!-- Remove this when static abstract interface members support is released -->
         <PackageReference Include="System.Runtime.Experimental" Version="6.0.0" />
+        
+        <!-- Used by .crypto command -->
+        <PackageReference Include="YahooFinanceApi" Version="2.1.2" />        
     </ItemGroup>
 
     <ItemGroup>
-        <ProjectReference Include="..\ayu\Ayu.Discord.Voice\Ayu.Discord.Voice.csproj"/>
+        <ProjectReference Include="..\ayu\Ayu.Discord.Voice\Ayu.Discord.Voice.csproj" />
-        <ProjectReference Include="..\NadekoBot.Generators\NadekoBot.Generators.csproj" OutputItemType="Analyzer"/>
+        <ProjectReference Include="..\NadekoBot.Generators\NadekoBot.Generators.csproj" OutputItemType="Analyzer" />
     </ItemGroup>
 
     <ItemGroup>
-        <AdditionalFiles Include="data\strings\responses\responses.en-US.json"/>
+        <AdditionalFiles Include="data\strings\responses\responses.en-US.json" />
     </ItemGroup>
     <ItemGroup>
         <Protobuf Include="..\NadekoBot.Coordinator\Protos\coordinator.proto" GrpcServices="Client">
@@ -102,13 +105,9 @@
     </PropertyGroup>
 
 	<!-- TODO: Remove this when the conflict issue is fixed -->
-	<Target Name="RemoveSystemRuntimeFromRefPack"
+	<Target Name="RemoveSystemRuntimeFromRefPack" BeforeTargets="_HandlePackageFileConflicts" Condition="'@(Reference -&gt; WithMetadataValue('NugetPackageId', 'System.Runtime.Experimental'))' != ''">
-		 BeforeTargets="_HandlePackageFileConflicts"
-		 Condition="'@(Reference -> WithMetadataValue('NugetPackageId', 'System.Runtime.Experimental'))' != ''">
 		<ItemGroup>
-			<Reference Remove="@(Reference)"
+			<Reference Remove="@(Reference)" Condition="$([System.String]::Copy(%(Reference.Identity)).Contains('System.Runtime.dll')) and&#xD;&#xA;                            '%(Reference.NuGetPackageId)' == 'Microsoft.NETCore.App.Ref'" />
-					   Condition="$([System.String]::Copy(%(Reference.Identity)).Contains('System.Runtime.dll')) and
-                            '%(Reference.NuGetPackageId)' == 'Microsoft.NETCore.App.Ref'" />
 		</ItemGroup>
 	</Target>
 </Project>

src/NadekoBot/_Extensions/ArrayExtensions.cs

@@ -1,3 +1,5 @@
+using System.Buffers;
+
 namespace NadekoBot.Extensions;
 
 // made for expressions because they almost never get added
@@ -29,4 +31,15 @@ public static class ArrayExtensions
     /// <returns>New array with updated elements</returns>
     public static TOut[] Map<TIn, TOut>(this TIn[] arr, Func<TIn, TOut> f)
         => Array.ConvertAll(arr, x => f(x));
+
+    public static IReadOnlyCollection<TOut> Map<TIn, TOut>(this IReadOnlyCollection<TIn> col, Func<TIn, TOut> f)
+    {
+        var toReturn = new TOut[col.Count];
+        
+        var i = 0;
+        foreach (var item in col)
+            toReturn[i++] = f(item);
+
+        return toReturn;
+    }
 }

src/NadekoBot/data/strings/commands/commands.en-US.yml

@@ -2033,6 +2033,11 @@ crypto:
   args:
     - "btc"
     - "bitcoin"
+stock:
+  desc: "Shows basic information about a stock. Only symbols are supported. Full company names are not supported atm."
+  args:
+    - "tsla"
+    - "amd"
 rolelevelreq:
   desc: "Set a level requirement on a self-assignable role."
   args:

src/NadekoBot/data/strings/responses/responses.en-US.json

@@ -888,6 +888,7 @@
   "volume_24h": "Volume (24h)",
   "change_7d_24h": "Change (7d / 24h)",
   "crypto_not_found": "CryptoCurrency with that name was not found.",
+  "stocks_multiple_results": "Multiple results found, please use a symbol",
   "did_you_mean": "Did you mean {0}?",
   "self_assign_level_req": "Self assignable role {0} now requires at least server level {1}.",
   "self_assign_not_level": "That self-assignable role requires at least server level {0}.",