managing-apps/src/Managing.Infrastructure.Database/InfluxDb/CandleRepository.cs

using InfluxDB.Client.Api.Domain;
using InfluxDB.Client.Writes;
using Managing.Application.Abstractions.Repositories;
using Managing.Core;
using Managing.Domain.Candles;
using Managing.Infrastructure.Databases.InfluxDb;
using Managing.Infrastructure.Databases.InfluxDb.Abstractions;
using Managing.Infrastructure.Databases.InfluxDb.Models;
using Microsoft.Extensions.Logging;
using static Managing.Common.Enums;

namespace Managing.Infrastructure.Databases;

public class CandleRepository : ICandleRepository
{
    private readonly string _priceBucket = "prices-bucket";
    private readonly IInfluxDbRepository _influxDbRepository;
    private readonly ILogger<CandleRepository> _logger;

    public CandleRepository(IInfluxDbRepository influxDbRepository, ILogger<CandleRepository> logger)
    {
        _influxDbRepository = influxDbRepository;
        _logger = logger;
    }

    public async Task<IList<Candle>> GetCandles(
        TradingExchanges exchange,
        Ticker ticker,
        Timeframe timeframe,
        DateTime start)
    {
        var results = await _influxDbRepository.QueryAsync(async query =>
        {
            var flux = $"from(bucket:\"{_priceBucket}\") " +
                       $"|> range(start: {start:s}Z) " +
                       $"|> filter(fn: (r) => r[\"exchange\"] == \"{exchange}\")" +
                       $"|> filter(fn: (r) => r[\"ticker\"] == \"{ticker}\")" +
                       $"|> filter(fn: (r) => r[\"timeframe\"] == \"{timeframe}\")" +
                       $"|> pivot(rowKey:[\"_time\"], columnKey: [\"_field\"], valueColumn: \"_value\")";

            var prices = await query.QueryAsync<PriceDto>(flux, _influxDbRepository.Organization);
            return prices.Select(price => PriceHelpers.Map(price)).ToList();
        });

        return results;
    }

    public async Task<IList<Candle>> GetCandles(
        TradingExchanges exchange,
        Ticker ticker,
        Timeframe timeframe,
        DateTime start,
        DateTime end)
    {
        var results = await _influxDbRepository.QueryAsync(async query =>
        {
            var flux = $"from(bucket:\"{_priceBucket}\") " +
                       $"|> range(start: {start:s}Z, stop: {end:s}Z) " +
                       $"|> filter(fn: (r) => r[\"exchange\"] == \"{exchange}\")" +
                       $"|> filter(fn: (r) => r[\"ticker\"] == \"{ticker}\")" +
                       $"|> filter(fn: (r) => r[\"timeframe\"] == \"{timeframe}\")" +
                       $"|> pivot(rowKey:[\"_time\"], columnKey: [\"_field\"], valueColumn: \"_value\")";

            var prices = await query.QueryAsync<PriceDto>(flux, _influxDbRepository.Organization);
            return prices.Select(price => PriceHelpers.Map(price)).ToList();
        });

        return results;
    }

    public async Task<IList<Ticker>> GetTickersAsync(
        TradingExchanges exchange,
        Timeframe timeframe,
        DateTime start)
    {
        var results = await _influxDbRepository.QueryAsync(async query =>
        {
            var flux = $"from(bucket:\"{_priceBucket}\") " +
                       $"|> range(start: {start:s}Z, stop: now()) " +
                       $"|> filter(fn: (r) => r[\"_measurement\"] == \"price\")" +
                       $"|> filter(fn: (r) => r[\"exchange\"] == \"{exchange}\")" +
                       $"|> filter(fn: (r) => r[\"timeframe\"] == \"{timeframe}\")" +
                       $"|> keep(columns: [\"ticker\"])" +
                       $"|> distinct()";

            var tickers = new List<Ticker>();
            var records = await query.QueryAsync(flux, _influxDbRepository.Organization);
            records.ForEach(table =>
            {
                var fluxRecords = table.Records;
                fluxRecords.ForEach(fluxRecord =>
                {
                    tickers.AddItem(
                        MiscExtensions.ParseEnum<Ticker>(fluxRecord.GetValueByKey("ticker").ToString()));
                });
            });

            return tickers;
        });

        return results;
    }

    public void InsertCandle(Candle candle)
    {
        _influxDbRepository.Write(write =>
        {
            PriceDto price = PriceHelpers.Map(candle);
            write.WriteMeasurement(
                price,
                WritePrecision.Ns,
                _priceBucket,
                _influxDbRepository.Organization);
        });
    }

    public void Test(Candle candle)
    {
        _influxDbRepository.Write(write =>
        {
            var point = PointData.Measurement("");
            PriceDto price = PriceHelpers.Map(candle);
            point.Tag("", "");
            point.Timestamp(price.OpenTime, WritePrecision.Ns);
            write.WritePoint(
                point,
                _priceBucket,
                _influxDbRepository.Organization);
        });
    }
}