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Telegram/SourceFiles/data/data_user_photos.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
+
+#include "data/data_abstract_sparse_ids.h"
+#include "storage/storage_user_photos.h"
+#include "base/weak_ptr.h"
+
+class UserData;
+
+namespace Main {
+class Session;
+} // namespace Main
+
+class UserPhotosSlice final : public AbstractSparseIds<std::deque<PhotoId>> {
+public:
+	using Key = Storage::UserPhotosKey;
+
+	UserPhotosSlice(Key key);
+	UserPhotosSlice(
+		Key key,
+		std::deque<PhotoId> &&ids,
+		std::optional<int> fullCount,
+		std::optional<int> skippedBefore,
+		std::optional<int> skippedAfter);
+
+	std::optional<int> distance(const Key &a, const Key &b) const;
+	const Key &key() const { return _key; }
+
+private:
+	Key _key;
+
+	friend class UserPhotosSliceBuilder;
+
+};
+
+rpl::producer<UserPhotosSlice> UserPhotosViewer(
+	not_null<Main::Session*> session,
+	UserPhotosSlice::Key key,
+	int limitBefore,
+	int limitAfter);
+
+rpl::producer<UserPhotosSlice> UserPhotosReversedViewer(
+	not_null<Main::Session*> session,
+	UserPhotosSlice::Key key,
+	int limitBefore,
+	int limitAfter);
+
+[[nodiscard]] std::optional<PhotoId> SyncUserFallbackPhotoViewer(
+	not_null<UserData*> user);