.stock now shows a candlestick chart with a sparkline on top of it. Reorganized stock code slightly

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

@@ -0,0 +1,90 @@
+using System.Text.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<StockData?> GetStockDataAsync(string query)
+    {
+        try
+        {
+            if (!query.IsAlphaNumeric())
+                return default;
+
+            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();
+
+            var symbol = symbols.Values.FirstOrDefault();
+
+            if (symbol is null)
+                return default;
+            
+            return new()
+            {
+                Name = symbol.LongName,
+                Symbol = symbol.Symbol,
+                Price = symbol.RegularMarketPrice,
+                Close = symbol.RegularMarketPreviousClose,
+                MarketCap = symbol.MarketCap,
+                Change50d = symbol.FiftyDayAverageChangePercent,
+                Change200d = symbol.TwoHundredDayAverageChangePercent,
+                DailyVolume = symbol.AverageDailyVolume10Day,
+                Exchange = symbol.FullExchangeName
+            };
+        }
+        catch (Exception ex)
+        {
+            // what the hell is this api exception
+            Log.Warning(ex, "Error getting stock data: {ErrorMessage}", ex.Message);
+            return default;
+        }
+    }
+
+    public async Task<IReadOnlyCollection<SymbolData>> SearchSymbolAsync(string query)
+    {
+        if (string.IsNullOrWhiteSpace(query))
+            throw new ArgumentNullException(nameof(query));
+
+        query = Uri.EscapeDataString(query);
+        
+        using var http = _httpClientFactory.CreateClient();
+        
+        var res = await http.GetStringAsync(
+            "https://finance.yahoo.com/_finance_doubledown/api/resource/searchassist"
+            + $";searchTerm={query}"
+            + "?device=console");
+
+        var data = JsonSerializer.Deserialize<YahooFinanceSearchResponse>(res);
+
+        if (data is null or { Items: null })
+            return Array.Empty<SymbolData>();
+        
+        return data.Items
+                  .Where(x => x.Type == "S")
+                  .Select(x => new SymbolData(x.Symbol, x.Name))
+                  .ToList();
+    }
+
+    public async Task<IReadOnlyCollection<CandleData>> GetCandleDataAsync(string query)
+    {
+        var candles = await Yahoo.GetHistoricalAsync(query, DateTime.Now.Subtract(30.Days()));
+
+        return candles
+            .Map(static x => new CandleData(x.Open, x.Close, x.High, x.Low, x.Volume));
+    }
+}