97 lines
3.9 KiB
C#
97 lines
3.9 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Net.Http;
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using System.Text.Json;
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using System.Threading;
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using System.Threading.Tasks;
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using FinlyticCore.Models.Trades;
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using Microsoft.Extensions.Logging;
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namespace FinlyticBackend.Services;
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/// <summary>
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/// Defines a service for dispatching push notifications via Firebase Cloud Messaging (FCM).
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/// </summary>
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public interface IFirebaseNotificationService
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{
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/// <summary>
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/// Sends a push notification about a new trade proposal.
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/// </summary>
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/// <param name="proposal">The trade proposal details.</param>
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/// <param name="fcmTokens">The list of FCM device tokens.</param>
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/// <param name="cancellationToken">A cancellation token.</param>
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/// <returns>A task representing the asynchronous operation.</returns>
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Task SendTradeProposalNotificationAsync(TradeProposalDto proposal, List<string> fcmTokens, CancellationToken cancellationToken = default);
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/// <summary>
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/// Sends a push notification about an update to an existing trade.
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/// </summary>
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/// <param name="update">The trade update details.</param>
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/// <param name="fcmTokens">The list of FCM device tokens.</param>
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/// <param name="cancellationToken">A cancellation token.</param>
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/// <returns>A task representing the asynchronous operation.</returns>
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Task SendTradeUpdateNotificationAsync(TradeHourlyUpdateDto update, List<string> fcmTokens, CancellationToken cancellationToken = default);
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}
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/// <inheritdoc />
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public class FirebaseNotificationService : IFirebaseNotificationService
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{
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private readonly HttpClient _httpClient;
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private readonly ILogger<FirebaseNotificationService> _logger;
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/// <summary>
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/// Initializes a new instance of the <see cref="FirebaseNotificationService"/> class.
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/// </summary>
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/// <param name="httpClient">The HTTP client for making API requests.</param>
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/// <param name="logger">The logger instance.</param>
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public FirebaseNotificationService(HttpClient httpClient, ILogger<FirebaseNotificationService> logger)
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{
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_httpClient = httpClient;
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_logger = logger;
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}
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/// <inheritdoc />
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public async Task SendTradeProposalNotificationAsync(TradeProposalDto proposal, List<string> fcmTokens, CancellationToken cancellationToken = default)
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{
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if (fcmTokens == null || fcmTokens.Count == 0) return;
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string title = $"🚀 Trade Signal: {proposal.SignalType} {proposal.Symbol}";
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string body = $"{proposal.CompanyName} ({proposal.Isin}) - Entry: ${proposal.EntryPrice:F2}, WinRate: {proposal.WinRate:F1}%. {proposal.Reasoning}";
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foreach (var token in fcmTokens)
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{
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await DispatchFcmMessageAsync(token, title, body, cancellationToken);
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}
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}
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/// <inheritdoc />
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public async Task SendTradeUpdateNotificationAsync(TradeHourlyUpdateDto update, List<string> fcmTokens, CancellationToken cancellationToken = default)
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{
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if (fcmTokens == null || fcmTokens.Count == 0) return;
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string title = $"📊 Trade Update: {update.TradeId}";
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string body = $"Recommendation: {update.Recommendation} @ ${update.CurrentPrice:F2}. {update.Reasoning}";
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foreach (var token in fcmTokens)
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{
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await DispatchFcmMessageAsync(token, title, body, cancellationToken);
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}
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}
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private Task DispatchFcmMessageAsync(string fcmToken, string title, string body, CancellationToken cancellationToken)
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{
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try
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{
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_logger.LogInformation("[{Channel}] FCM Push Notification dispatched to Token [{TokenPrefix}...]: Title='{Title}', Body='{Body}'",
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"NotificationChannel", fcmToken.Length > 10 ? fcmToken[..10] : fcmToken, title, body);
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, "[{Channel}] Failed to send FCM push notification to token {Token}", "NotificationChannel", fcmToken);
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}
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return Task.CompletedTask;
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}
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}
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