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Telegram/SourceFiles/api/api_who_reacted.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
+
+class HistoryItem;
+
+namespace style {
+struct WhoRead;
+} // namespace style
+
+namespace Ui {
+struct WhoReadContent;
+enum class WhoReadType;
+} // namespace Ui
+
+namespace Data {
+struct ReactionId;
+} // namespace Data
+
+namespace Api {
+
+enum class WhoReactedList {
+	All,
+	One,
+};
+
+[[nodiscard]] QString FormatReadDate(TimeId date, const QDateTime &now);
+[[nodiscard]] bool WhoReadExists(not_null<HistoryItem*> item);
+[[nodiscard]] bool WhoReactedExists(
+	not_null<HistoryItem*> item,
+	WhoReactedList list);
+
+struct WhoReadPeer {
+	PeerId peer = 0;
+	TimeId date = 0;
+	bool dateReacted = false;
+
+	friend inline bool operator==(
+		const WhoReadPeer &a,
+		const WhoReadPeer &b) noexcept = default;
+};
+
+struct WhoReadList {
+	std::vector<WhoReadPeer> list;
+	Ui::WhoReadType type = {};
+};
+
+// The context must be destroyed before the session holding this item.
+[[nodiscard]] rpl::producer<Ui::WhoReadContent> WhoReacted(
+	not_null<HistoryItem*> item,
+	not_null<QWidget*> context, // Cache results for this lifetime.
+	const style::WhoRead &st,
+	std::shared_ptr<WhoReadList> whoReadIds = nullptr);
+[[nodiscard]] rpl::producer<Ui::WhoReadContent> WhoReacted(
+	not_null<HistoryItem*> item,
+	const Data::ReactionId &reaction,
+	not_null<QWidget*> context, // Cache results for this lifetime.
+	const style::WhoRead &st);
+[[nodiscard]] rpl::producer<Ui::WhoReadContent> WhenEdited(
+	not_null<PeerData*> author,
+	TimeId date);
+[[nodiscard]] rpl::producer<Ui::WhoReadContent> WhenOriginal(
+	not_null<PeerData*> author,
+	TimeId date);
+
+} // namespace Api