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Telegram/SourceFiles/media/audio/media_audio_local_cache.h

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+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#pragma once
+
+namespace Media::Audio {
+
+struct LocalSound {
+    DocumentId id = 0;
+    QByteArray wav;
+
+    explicit operator bool() const {
+        return !wav.isEmpty();
+    }
+};
+
+class LocalCache final {
+public:
+    [[nodiscard]] LocalSound sound(
+        DocumentId id,
+        Fn<QByteArray()> resolveOriginalBytes,
+        Fn<QByteArray()> fallbackOriginalBytes);
+
+private:
+    base::flat_map<DocumentId, QByteArray> _cache;
+
+};
+
+class LocalDiskCache final {
+public:
+    explicit LocalDiskCache(const QString &folder);
+
+    [[nodiscard]] QString name(const LocalSound &sound);
+    [[nodiscard]] QString path(const LocalSound &sound);
+
+private:
+    const QString _base;
+	base::flat_map<DocumentId, QString> _paths;
+
+};
+
+} // namespace Media::Audio