From bb143a26f26882a1c5c2f602ac89344a4381f594 Mon Sep 17 00:00:00 2001
From: RadRussianRus <radrussianrus@gmail.com>
Date: Sun, 29 Sep 2019 20:21:43 +0300
Subject: [PATCH] Ability to restore previously hidden pinned message

---
 .../SourceFiles/history/history_widget.cpp    | 26 +++++++++++++++++++
 Telegram/SourceFiles/history/history_widget.h |  2 ++
 .../SourceFiles/window/window_peer_menu.cpp   | 25 ++++++++++++++++++
 .../SourceFiles/window/window_peer_menu.h     |  1 +
 4 files changed, 54 insertions(+)

diff --git a/Telegram/SourceFiles/history/history_widget.cpp b/Telegram/SourceFiles/history/history_widget.cpp
index 4cf333dab..a6e9cc187 100644
--- a/Telegram/SourceFiles/history/history_widget.cpp
+++ b/Telegram/SourceFiles/history/history_widget.cpp
@@ -5643,6 +5643,32 @@ void HistoryWidget::updatePinnedBar(bool force) {
 	}
 }
 
+bool HistoryWidget::hasHiddenPinnedMessage(not_null<PeerData*> peer) {
+	auto result = false;
+	auto pinnedId = peer->pinnedMessageId();
+	if (pinnedId) {
+		auto it = Global::HiddenPinnedMessages().constFind(peer->id);
+		if (it != Global::HiddenPinnedMessages().cend()) {
+			result = true;
+		}
+	}
+	return result;
+}
+
+bool HistoryWidget::unhidePinnedMessage(not_null<PeerData*> peer) {
+	auto result = false;
+	auto pinnedId = peer->pinnedMessageId();
+	if (pinnedId) {
+		auto it = Global::HiddenPinnedMessages().constFind(peer->id);
+		if (it != Global::HiddenPinnedMessages().cend()) {
+			Global::RefHiddenPinnedMessages().remove(peer->id);
+			Local::writeUserSettings();
+			result = true;
+		}
+	}
+	return result;
+}
+
 bool HistoryWidget::pinnedMsgVisibilityUpdated() {
 	auto result = false;
 	auto pinnedId = _peer->pinnedMessageId();
diff --git a/Telegram/SourceFiles/history/history_widget.h b/Telegram/SourceFiles/history/history_widget.h
index bd28252e7..3feb7e782 100644
--- a/Telegram/SourceFiles/history/history_widget.h
+++ b/Telegram/SourceFiles/history/history_widget.h
@@ -137,6 +137,8 @@ public:
 	void sendFileConfirmed(const std::shared_ptr<FileLoadResult> &file,
 		const std::optional<FullMsgId> &oldId = std::nullopt);
 
+	static bool hasHiddenPinnedMessage(not_null<PeerData*> peer);
+	static bool unhidePinnedMessage(not_null<PeerData*> peer);
 	void updateControlsVisibility();
 	void updateControlsGeometry();
 
diff --git a/Telegram/SourceFiles/window/window_peer_menu.cpp b/Telegram/SourceFiles/window/window_peer_menu.cpp
index f43b63c77..9a6a47e2e 100644
--- a/Telegram/SourceFiles/window/window_peer_menu.cpp
+++ b/Telegram/SourceFiles/window/window_peer_menu.cpp
@@ -29,6 +29,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "history/history.h"
 #include "history/history_item.h"
 #include "history/history_message.h" // GetErrorTextForSending.
+#include "history/history_widget.h"
 #include "window/window_session_controller.h"
 #include "window/window_controller.h"
 #include "support/support_helper.h"
@@ -387,6 +388,11 @@ void Filler::addUserActions(not_null<UserData*> user) {
 				user->session().supportHelper().editInfo(user);
 			});
 		}
+		if (user->isSelf() && HistoryWidget::hasHiddenPinnedMessage(user)) {
+			_addAction(
+				tr::lng_pinned_message(tr::now),
+				[=] { PeerMenuUnhidePinnedMessage(user); });
+		}
 		if (!user->isContact() && !user->isSelf() && !user->isBot()) {
 			_addAction(
 				tr::lng_info_add_as_contact(tr::now),
@@ -439,6 +445,11 @@ void Filler::addChatActions(not_null<ChatData*> chat) {
 				controller->showEditPeerBox(chat);
 			});
 		}
+		if (HistoryWidget::hasHiddenPinnedMessage(chat)) {
+			_addAction(
+				tr::lng_pinned_message(tr::now),
+				[=] { PeerMenuUnhidePinnedMessage(chat); });
+		}
 		if (chat->canAddMembers()) {
 			_addAction(
 				tr::lng_profile_add_participant(tr::now),
@@ -485,6 +496,11 @@ void Filler::addChannelActions(not_null<ChannelData*> channel) {
 				controller->showEditPeerBox(channel);
 			});
 		}
+		if (HistoryWidget::hasHiddenPinnedMessage(channel)) {
+			_addAction(
+				tr::lng_pinned_message(tr::now),
+				[=] { PeerMenuUnhidePinnedMessage(channel); });
+		}
 		if (channel->canAddMembers()) {
 			_addAction(
 				tr::lng_channel_add_members(tr::now),
@@ -637,6 +653,15 @@ void FolderFiller::addTogglesForArchive() {
 
 } // namespace
 
+void PeerMenuUnhidePinnedMessage(not_null<PeerData*> peer) {
+	auto unhidden = HistoryWidget::unhidePinnedMessage(peer);
+	if (unhidden) {
+		Notify::peerUpdatedDelayed(
+			peer,
+			Notify::PeerUpdate::Flag::PinnedMessageChanged);
+	}
+}
+
 void PeerMenuExportChat(not_null<PeerData*> peer) {
 	peer->owner().startExport(peer);
 }
diff --git a/Telegram/SourceFiles/window/window_peer_menu.h b/Telegram/SourceFiles/window/window_peer_menu.h
index b376a4499..8f671a556 100644
--- a/Telegram/SourceFiles/window/window_peer_menu.h
+++ b/Telegram/SourceFiles/window/window_peer_menu.h
@@ -48,6 +48,7 @@ void PeerMenuAddMuteAction(
 	not_null<PeerData*> peer,
 	const PeerMenuCallback &addAction);
 
+void PeerMenuUnhidePinnedMessage(not_null<PeerData*> peer);
 void PeerMenuExportChat(not_null<PeerData*> peer);
 void PeerMenuDeleteContact(not_null<UserData*> user);
 void PeerMenuShareContactBox(