Add option to ignore specific downloads (#79)

2025-03-09 23:38:27 +02:00
parent 81990c6768
commit 027c4a0f4d
28 changed files with 552 additions and 121 deletions
@@ -0,0 +1,82 @@
+using Common.Configuration;
+using Infrastructure.Helpers;
+using Microsoft.Extensions.Caching.Memory;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+
+namespace Infrastructure.Providers;
+
+public sealed class IgnoredDownloadsProvider<T>
+    where T : IIgnoredDownloadsConfig
+{
+    private readonly ILogger<IgnoredDownloadsProvider<T>> _logger;
+    private IIgnoredDownloadsConfig _config;
+    private readonly IMemoryCache _cache;
+    private DateTime _lastModified = DateTime.MinValue;
+
+    public IgnoredDownloadsProvider(ILogger<IgnoredDownloadsProvider<T>> logger, IOptionsMonitor<T> config, IMemoryCache cache)
+    {
+        _config = config.CurrentValue;
+        config.OnChange((newValue) => _config = newValue);
+        _logger = logger;
+        _cache = cache;
+
+        if (string.IsNullOrEmpty(_config.IgnoredDownloadsPath))
+        {
+            return;
+        }
+
+        if (!File.Exists(_config.IgnoredDownloadsPath))
+        {
+            throw new FileNotFoundException("file not found", _config.IgnoredDownloadsPath);
+        }
+    }
+
+    public async Task<IReadOnlyList<string>> GetIgnoredDownloads()
+    {
+        if (string.IsNullOrEmpty(_config.IgnoredDownloadsPath))
+        {
+            return Array.Empty<string>();
+        }
+
+        FileInfo fileInfo = new(_config.IgnoredDownloadsPath);
+        
+        if (fileInfo.LastWriteTime > _lastModified ||
+            !_cache.TryGetValue(CacheKeys.IgnoredDownloads(typeof(T).Name), out IReadOnlyList<string>? ignoredDownloads) ||
+            ignoredDownloads is null)
+        {
+            _lastModified = fileInfo.LastWriteTime;
+
+            return await LoadFile();
+        }
+        
+        return ignoredDownloads;
+    }
+
+    private async Task<IReadOnlyList<string>> LoadFile()
+    {
+        try
+        {
+            if (string.IsNullOrEmpty(_config.IgnoredDownloadsPath))
+            {
+                return Array.Empty<string>();
+            }
+
+            string[] ignoredDownloads = (await File.ReadAllLinesAsync(_config.IgnoredDownloadsPath))
+                .Where(x => !string.IsNullOrWhiteSpace(x))
+                .ToArray();
+
+            _cache.Set(CacheKeys.IgnoredDownloads(typeof(T).Name), ignoredDownloads);
+
+            _logger.LogInformation("ignored downloads reloaded");
+
+            return ignoredDownloads;
+        }
+        catch (Exception exception)
+        {
+            _logger.LogError(exception, "error while reading ignored downloads file | {file}", _config.IgnoredDownloadsPath);
+        }
+
+        return Array.Empty<string>();
+    }
+}