Added ability to use previous peer userpics.

Telegram/Resources/langs/lang.strings

@@ -2043,6 +2043,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 "lng_mediaview_today" = "today at {time}";
 "lng_mediaview_yesterday" = "yesterday at {time}";
 "lng_mediaview_date_time" = "{date} at {time}";
+"lng_mediaview_set_userpic" = "Set as Main";
 
 "lng_mediaview_saved_to" = "Image was saved to your {downloads} folder";
 "lng_mediaview_downloads" = "Downloads";

Telegram/SourceFiles/api/api_peer_photo.cpp

@@ -165,6 +165,37 @@ void PeerPhoto::clear(not_null<PhotoData*> photo) {
 	}
 }
 
+void PeerPhoto::set(not_null<PeerData*> peer, not_null<PhotoData*> photo) {
+	if (peer->userpicPhotoId() == photo->id) {
+		return;
+	}
+	if (peer == _session->user()) {
+		_api.request(MTPphotos_UpdateProfilePhoto(
+			photo->mtpInput()
+		)).done([=](const MTPphotos_Photo &result) {
+			result.match([&](const MTPDphotos_photo &data) {
+				_session->data().processPhoto(data.vphoto());
+				_session->data().processUsers(data.vusers());
+			});
+		}).send();
+	} else {
+		const auto applier = [=](const MTPUpdates &result) {
+			_session->updates().applyUpdates(result);
+		};
+		if (const auto chat = peer->asChat()) {
+			_api.request(MTPmessages_EditChatPhoto(
+				chat->inputChat,
+				MTP_inputChatPhoto(photo->mtpInput())
+			)).done(applier).send();
+		} else if (const auto channel = peer->asChannel()) {
+			_api.request(MTPchannels_EditPhoto(
+				channel->inputChannel,
+				MTP_inputChatPhoto(photo->mtpInput())
+			)).done(applier).send();
+		}
+	}
+}
+
 void PeerPhoto::ready(const FullMsgId &msgId, const MTPInputFile &file) {
 	const auto maybePeer = _uploads.take(msgId);
 	if (!maybePeer) {

Telegram/SourceFiles/api/api_peer_photo.h

@@ -24,6 +24,7 @@ public:
 
 	void upload(not_null<PeerData*> peer, QImage &&image);
 	void clear(not_null<PhotoData*> photo);
+	void set(not_null<PeerData*> peer, not_null<PhotoData*> photo);
 
 private:
 	void ready(const FullMsgId &msgId, const MTPInputFile &file);

Telegram/SourceFiles/media/view/media_view_overlay_widget.cpp

@@ -46,6 +46,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "history/view/media/history_view_media.h"
 #include "data/data_media_types.h"
 #include "data/data_session.h"
+#include "data/data_changes.h"
 #include "data/data_channel.h"
 #include "data/data_chat.h"
 #include "data/data_user.h"
@@ -995,6 +996,47 @@ void OverlayWidget::fillContextMenuActions(const MenuCallback &addAction) {
 			[=] { showMediaOverview(); },
 			&st::mediaMenuIconShowAll);
 	}
+	[&] { // Set userpic.
+		if (!_peer || !_photo || (_peer->userpicPhotoId() == _photo->id)) {
+			return;
+		}
+		using Type = SharedMediaType;
+		if (sharedMediaType().value_or(Type::File) == Type::ChatPhoto) {
+			if (const auto chat = _peer->asChat()) {
+				if (!chat->canEditInformation()) {
+					return;
+				}
+			} else if (const auto channel = _peer->asChannel()) {
+				if (!channel->canEditInformation()) {
+					return;
+				}
+			} else {
+				return;
+			}
+		} else if (userPhotosKey()) {
+			if (_user != _user->session().user()) {
+				return;
+			}
+		} else {
+			return;
+		}
+		const auto photo = _photo;
+		const auto peer = _peer;
+		addAction(tr::lng_mediaview_set_userpic(tr::now), [=] {
+			auto lifetime = std::make_shared<rpl::lifetime>();
+			peer->session().changes().peerFlagsValue(
+				peer,
+				Data::PeerUpdate::Flag::Photo
+			) | rpl::start_with_next([=]() mutable {
+				if (lifetime) {
+					base::take(lifetime)->destroy();
+				}
+				close();
+			}, *lifetime);
+
+			peer->session().api().peerPhoto().set(peer, photo);
+		}, &st::mediaMenuIconProfile);
+	}();
 }
 
 auto OverlayWidget::computeOverviewType() const

Telegram/SourceFiles/ui/menu_icons.style

@@ -129,6 +129,7 @@ mediaMenuIconCopy: icon {{ "menu/copy", mediaviewMenuFg }};
 mediaMenuIconForward: icon {{ "menu/forward", mediaviewMenuFg }};
 mediaMenuIconDelete: icon {{ "menu/delete", mediaviewMenuFg }};
 mediaMenuIconShowAll: icon {{ "menu/all_media", mediaviewMenuFg }};
+mediaMenuIconProfile: icon {{ "menu/profile", mediaviewMenuFg }};
 
 menuIconStartStream: icon {{ "menu/start_stream", menuIconColor }};
 menuIconStartStreamWith: icon {{ "menu/start_stream_with", menuIconColor }};