CDN-CS stuff
1 files changed, 58 insertions, 0 deletions
diff --git a/extra/admin-api/Spacebar.Cdn/Services/LruFileCache.cs b/extra/admin-api/Spacebar.Cdn/Services/LruFileCache.cs
new file mode 100644
index 00000000..3a25b1e4
--- /dev/null
+++ b/extra/admin-api/Spacebar.Cdn/Services/LruFileCache.cs
@@ -0,0 +1,58 @@
+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; }
+ }
+}
\ No newline at end of file
|
