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namespace Spacebar.AdminApi.TestClient.Services.Services;
public class LruFileCache(int maxSizeBytes) {
private readonly Dictionary<string, Entry> _entries = new();
public async Task<Entry?> GetOrAdd(string key, Func<Task<Entry>> factory) {
if (_entries.TryGetValue(key, out var entry)) {
entry.LastAccessed = DateTimeOffset.UtcNow;
return entry;
}
entry = await factory();
if (entry.Data.Length > 0)
_entries[key] = entry;
if (_entries.Sum(kv => kv.Value.Data.Length) > maxSizeBytes) {
var oldestKey = _entries.OrderBy(kv => kv.Value.LastAccessed).First().Key;
_entries.Remove(oldestKey);
}
return entry;
}
public class Entry {
public DateTimeOffset LastAccessed { get; set; }
public byte[] Data { get; set; }
public string MimeType { get; set; }
}
}
public class LruCache<T>(int maxItems) {
private readonly Dictionary<string, CacheItem> _items = new();
public async Task<T?> GetOrAddAsync(string key, Func<Task<T>> factory) {
if (_items.TryGetValue(key, out var cacheItem)) {
cacheItem.LastAccessed = DateTimeOffset.UtcNow;
return cacheItem.Value;
}
var value = await factory();
_items[key] = new CacheItem {
Value = value,
LastAccessed = DateTimeOffset.UtcNow
};
if (_items.Count > maxItems) {
var oldestKey = _items.OrderBy(kv => kv.Value.LastAccessed).First().Key;
_items.Remove(oldestKey);
}
return value;
}
private class CacheItem {
public T Value { get; set; }
public DateTimeOffset LastAccessed { get; set; }
}
}
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