Add export format selection (text / json).

Telegram/Resources/langs/lang.strings

@@ -1676,6 +1676,9 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 "lng_export_option_gifs" = "Animated GIFs";
 "lng_export_option_files" = "Files";
 "lng_export_option_size_limit" = "Size limit: {size}";
+"lng_export_header_format" = "Format";
+"lng_export_option_text" = "Human-readable text";
+"lng_export_option_json" = "Machine-readable JSON";
 "lng_export_start" = "Export";
 "lng_export_state_initializing" = "Initializing...";
 "lng_export_state_userpics" = "Personal photos";

Telegram/SourceFiles/export/output/export_output_abstract.h

@@ -29,8 +29,8 @@ struct Result;
 class Stats;
 
 enum class Format {
-	Json,
 	Text,
+	Json,
 	Yaml,
 	Html,
 };

Telegram/SourceFiles/export/output/export_output_json.cpp

@@ -143,6 +143,9 @@ QByteArray SerializeText(
 	if (data.empty()) {
 		return SerializeString("");
 	}
+
+	context.nesting.push_back(Context::kArray);
+
 	const auto text = ranges::view::all(
 		data
 	) | ranges::view::transform([&](const Data::TextPart &part) {
@@ -187,6 +190,8 @@ QByteArray SerializeText(
 		});
 	}) | ranges::to_vector;
 
+	context.nesting.pop_back();
+
 	if (data.size() == 1 && data[0].type == Data::TextPart::Type::Text) {
 		return text[0];
 	}

Telegram/SourceFiles/export/view/export_view_settings.cpp

@@ -7,6 +7,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 */
 #include "export/view/export_view_settings.h"
 
+#include "export/output/export_output_abstract.h"
 #include "lang/lang_keys.h"
 #include "ui/widgets/checkbox.h"
 #include "ui/widgets/buttons.h"
@@ -213,6 +214,25 @@ void SettingsWidget::setupContent() {
 	addSubOption(lng_export_option_files, MediaType::File);
 	createSizeSlider(media);
 
+	const auto formatGroup = std::make_shared<Ui::RadioenumGroup<Format>>(
+		_data.format);
+	formatGroup->setChangedCallback([=](Format format) {
+		_data.format = format;
+	});
+	const auto addFormatOption = [&](LangKey key, Format format) {
+		const auto radio = content->add(
+			object_ptr<Ui::Radioenum<Format>>(
+				content,
+				formatGroup,
+				format,
+				lang(key),
+				st::defaultBoxCheckbox),
+			st::exportSettingPadding);
+	};
+	addHeader(content, lng_export_header_format);
+	addFormatOption(lng_export_option_text, Format::Text);
+	addFormatOption(lng_export_option_json, Format::Json);
+
 	_dataTypesChanges.events_starting_with_copy(
 		_data.types
 	) | rpl::start_with_next([=](Settings::Types types) {

Telegram/SourceFiles/export/view/export_view_settings.h

@@ -29,6 +29,7 @@ private:
 	using Types = Settings::Types;
 	using MediaType = MediaSettings::Type;
 	using MediaTypes = MediaSettings::Types;
+	using Format = Output::Format;
 
 	void setupContent();
 	void chooseFolder();