Moved out api translations as separated provider.

Telegram/CMakeLists.txt

@@ -1230,6 +1230,8 @@ PRIVATE
     lang/lang_numbers_animation.h
     lang/lang_translator.cpp
     lang/lang_translator.h
+    lang/translate_provider.cpp
+    lang/translate_provider.h
     layout/layout_document_generic_preview.cpp
     layout/layout_document_generic_preview.h
     layout/layout_item_base.cpp

Telegram/SourceFiles/boxes/translate_box.cpp

@@ -7,8 +7,8 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 */
 #include "boxes/translate_box.h"
 #include "boxes/translate_box_content.h"
+#include "lang/translate_provider.h"
 
-#include "api/api_text_entities.h" // Api::EntitiesToMTP / EntitiesFromMTP.
 #include "core/application.h"
 #include "core/core_settings.h"
 #include "core/ui_integration.h"
@@ -18,7 +18,6 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "lang/lang_instance.h"
 #include "lang/lang_keys.h"
 #include "main/main_session.h"
-#include "mtproto/sender.h"
 #include "spellcheck/platform/platform_language.h"
 #include "ui/boxes/choose_language_box.h"
 #include "ui/layers/generic_box.h"
@@ -39,29 +38,24 @@ void TranslateBox(
 		TextWithEntities text,
 		bool hasCopyRestriction) {
 	struct State {
-		State(not_null<Main::Session*> session) : api(&session->mtp()) {
+		State(not_null<Main::Session*> session)
+		: provider(CreateTranslateProvider(session)) {
 		}
 
-		MTP::Sender api;
+		std::unique_ptr<TranslateProvider> provider;
 		rpl::variable<LanguageId> to;
 	};
 	const auto state = box->lifetime().make_state<State>(&peer->session());
 	state->to = ChooseTranslateTo(peer->owner().history(peer));
-
-	if (!IsServerMsgId(msgId)) {
-		msgId = 0;
-	}
-
-	using Flag = MTPmessages_TranslateText::Flag;
-	const auto flags = msgId
-		? (Flag::f_peer | Flag::f_id)
-		: !text.text.isEmpty()
-		? Flag::f_text
-		: Flag(0);
-	const auto requestText = text;
+	const auto request = std::make_shared<TranslateProviderRequest>(
+		PrepareTranslateProviderRequest(
+			state->provider.get(),
+			peer,
+			msgId,
+			std::move(text)));
 
 	TranslateBoxContent(box, {
-		.text = std::move(text),
+		.text = request->text,
 		.hasCopyRestriction = hasCopyRestriction,
 		.textContext = Core::TextContext({ .session = &peer->session() }),
 		.to = state->to.value(),
@@ -71,33 +65,7 @@ void TranslateBox(
 				crl::guard(box, [=](LanguageId id) { state->to = id; })));
 		},
 		.request = [=](LanguageId to, Fn<void(std::optional<TextWithEntities>)> done) {
-			const auto callback = std::make_shared<
-				Fn<void(std::optional<TextWithEntities>)>>(std::move(done));
-			state->api.request(MTPmessages_TranslateText(
-				MTP_flags(flags),
-				msgId ? peer->input() : MTP_inputPeerEmpty(),
-				(msgId
-					? MTP_vector<MTPint>(1, MTP_int(msgId))
-					: MTPVector<MTPint>()),
-				(msgId
-					? MTPVector<MTPTextWithEntities>()
-					: MTP_vector<MTPTextWithEntities>(1, MTP_textWithEntities(
-						MTP_string(requestText.text),
-						Api::EntitiesToMTP(
-							&peer->session(),
-							requestText.entities,
-							Api::ConvertOption::SkipLocal)))),
-				MTP_string(to.twoLetterCode())
-			)).done([=](const MTPmessages_TranslatedText &result) {
-				const auto &data = result.data();
-				const auto &list = data.vresult().v;
-				(*callback)(list.isEmpty()
-					? std::optional<TextWithEntities>()
-					: std::optional<TextWithEntities>(
-						Api::ParseTextWithEntities(&peer->session(), list.front())));
-			}).fail([=](const MTP::Error &) {
-				(*callback)(std::nullopt);
-			}).send();
+			state->provider->request(*request, to, std::move(done));
 		},
 	});
 }

Telegram/SourceFiles/lang/translate_provider.cpp

@@ -0,0 +1,121 @@
+/*
+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
+*/
+#include "lang/translate_provider.h"
+
+#include "api/api_text_entities.h"
+#include "data/data_msg_id.h"
+#include "data/data_peer.h"
+#include "data/data_session.h"
+#include "history/history_item.h"
+#include "main/main_session.h"
+#include "mtproto/sender.h"
+
+namespace Ui {
+namespace {
+
+enum class TranslateProviderKind {
+	MTProtoServer,
+};
+
+[[nodiscard]] TranslateProviderKind CurrentTranslateProviderKind() {
+	return TranslateProviderKind::MTProtoServer;
+}
+
+class MTProtoTranslateProvider final : public TranslateProvider {
+public:
+	explicit MTProtoTranslateProvider(not_null<Main::Session*> session)
+	: _api(&session->mtp()) {
+	}
+
+	[[nodiscard]] bool supportsMessageId() const override {
+		return true;
+	}
+
+	void request(
+			TranslateProviderRequest request,
+			LanguageId to,
+			Fn<void(std::optional<TextWithEntities>)> done) override {
+		using Flag = MTPmessages_TranslateText::Flag;
+		const auto flags = request.msgId
+			? (Flag::f_peer | Flag::f_id)
+			: !request.text.text.isEmpty()
+			? Flag::f_text
+			: Flag(0);
+		if (!flags) {
+			done(std::nullopt);
+			return;
+		}
+		const auto callback = std::make_shared<
+			Fn<void(std::optional<TextWithEntities>)>>(std::move(done));
+		_api.request(MTPmessages_TranslateText(
+			MTP_flags(flags),
+			request.msgId ? request.peer->input() : MTP_inputPeerEmpty(),
+			(request.msgId
+				? MTP_vector<MTPint>(1, MTP_int(request.msgId))
+				: MTPVector<MTPint>()),
+			(request.msgId
+				? MTPVector<MTPTextWithEntities>()
+				: MTP_vector<MTPTextWithEntities>(1, MTP_textWithEntities(
+					MTP_string(request.text.text),
+					Api::EntitiesToMTP(
+						&request.peer->session(),
+						request.text.entities,
+						Api::ConvertOption::SkipLocal)))),
+			MTP_string(to.twoLetterCode())
+		)).done([=](const MTPmessages_TranslatedText &result) {
+			const auto &data = result.data();
+			const auto &list = data.vresult().v;
+			(*callback)(list.isEmpty()
+				? std::optional<TextWithEntities>()
+				: std::optional<TextWithEntities>(Api::ParseTextWithEntities(
+					&request.peer->session(),
+					list.front())));
+		}).fail([=](const MTP::Error &) {
+			(*callback)(std::nullopt);
+		}).send();
+	}
+
+private:
+	MTP::Sender _api;
+
+};
+
+} // namespace
+
+std::unique_ptr<TranslateProvider> CreateTranslateProvider(
+		not_null<Main::Session*> session) {
+	switch (CurrentTranslateProviderKind()) {
+	case TranslateProviderKind::MTProtoServer:
+		return std::make_unique<MTProtoTranslateProvider>(session);
+	}
+	return std::make_unique<MTProtoTranslateProvider>(session);
+}
+
+TranslateProviderRequest PrepareTranslateProviderRequest(
+		not_null<TranslateProvider*> provider,
+		not_null<PeerData*> peer,
+		MsgId msgId,
+		TextWithEntities text) {
+	auto result = TranslateProviderRequest{
+		.peer = peer,
+		.msgId = IsServerMsgId(msgId) ? msgId : MsgId(),
+		.text = std::move(text),
+	};
+	if (provider->supportsMessageId()) {
+		return result;
+	}
+	if (result.msgId) {
+		if (const auto item = peer->owner().message(peer, result.msgId)) {
+			result.text = item->originalText();
+		}
+		result.msgId = 0;
+	}
+	return result;
+}
+
+} // namespace Ui

Telegram/SourceFiles/lang/translate_provider.h

@@ -0,0 +1,46 @@
+/*
+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 "spellcheck/platform/platform_language.h"
+#include "ui/text/text_entity.h"
+
+class PeerData;
+
+namespace Main {
+class Session;
+} // namespace Main
+
+namespace Ui {
+
+struct TranslateProviderRequest {
+	not_null<PeerData*> peer;
+	MsgId msgId = 0;
+	TextWithEntities text;
+};
+
+class TranslateProvider {
+public:
+	virtual ~TranslateProvider() = default;
+	[[nodiscard]] virtual bool supportsMessageId() const = 0;
+	virtual void request(
+		TranslateProviderRequest request,
+		LanguageId to,
+		Fn<void(std::optional<TextWithEntities>)> done) = 0;
+};
+
+[[nodiscard]] std::unique_ptr<TranslateProvider> CreateTranslateProvider(
+	not_null<Main::Session*> session);
+
+[[nodiscard]] TranslateProviderRequest PrepareTranslateProviderRequest(
+	not_null<TranslateProvider*> provider,
+	not_null<PeerData*> peer,
+	MsgId msgId,
+	TextWithEntities text);
+
+} // namespace Ui