From 3d9df02f5f02d77646b298bfcc34daeebceb01a6 Mon Sep 17 00:00:00 2001
From: bubnikv <bubnikv@gmail.com>
Date: Mon, 29 Jul 2019 17:55:50 +0200
Subject: [PATCH] When accessing the localized web pages provided by Prusa
 Research, only those language codes are now passed to the Prusa Research web
 server, which are currently supported. For example, there is no web page for
 "en_UK", the "en_UK" code will be translated to "en_US".

---
 src/slic3r/GUI/GUI_App.cpp       | 29 ++++++++++++++++++++++++++++-
 src/slic3r/GUI/GUI_App.hpp       |  4 +++-
 src/slic3r/GUI/UpdateDialogs.cpp |  4 ++--
 3 files changed, 33 insertions(+), 4 deletions(-)

diff --git a/src/slic3r/GUI/GUI_App.cpp b/src/slic3r/GUI/GUI_App.cpp
index 02290e83d..1a864917d 100644
--- a/src/slic3r/GUI/GUI_App.cpp
+++ b/src/slic3r/GUI/GUI_App.cpp
@@ -974,9 +974,36 @@ int GUI_App::extruders_edited_cnt() const
            preset.config.option<ConfigOptionFloats>("nozzle_diameter")->values.size();
 }
 
+wxString GUI_App::current_language_code_safe() const
+{
+	// Translate the language code to a code, for which Prusa Research maintains translations.
+	wxString language_code = this->current_language_code();
+	size_t   idx_underscore = language_code.find(language_code);
+	if (idx_underscore != wxString::npos)
+		language_code = language_code.substr(0, idx_underscore);
+	const std::map<wxString, wxString> mapping {
+		{ "cs", 	"cs_CZ", },
+		{ "de", 	"de_DE", },
+		{ "es", 	"es_ES", },
+		{ "fr", 	"fr_FR", },
+		{ "it", 	"it_IT", },
+		{ "ja", 	"ja_JP", },
+		{ "ko", 	"ko_KR", },
+		{ "pl", 	"pl_PL", },
+		{ "uk", 	"uk_UA", },
+		{ "zh", 	"zh_CN", },
+	};
+	auto it = mapping.find(language_code);
+	if (it != mapping.end())
+		language_code = it->second;
+	else
+		language_code = "en_US";
+	return language_code;
+}
+
 void GUI_App::open_web_page_localized(const std::string &http_address)
 {
-    wxLaunchDefaultBrowser(http_address + "&lng=" + this->current_language_code());
+    wxLaunchDefaultBrowser(http_address + "&lng=" + this->current_language_code_safe());
 }
 
 void GUI_App::window_pos_save(wxTopLevelWindow* window, const std::string &name)
diff --git a/src/slic3r/GUI/GUI_App.hpp b/src/slic3r/GUI/GUI_App.hpp
index 8d0bcfe2f..5c897a701 100644
--- a/src/slic3r/GUI/GUI_App.hpp
+++ b/src/slic3r/GUI/GUI_App.hpp
@@ -143,7 +143,9 @@ public:
     bool            checked_tab(Tab* tab);
     void            load_current_presets();
 
-    wxString        current_language_code() { return m_wxLocale != nullptr ? m_wxLocale->GetCanonicalName() : wxString("en_US"); }
+    wxString        current_language_code() const { return m_wxLocale != nullptr ? m_wxLocale->GetCanonicalName() : wxString("en_US"); }
+	// Translate the language code to a code, for which Prusa Research maintains translations. Defaults to "en_US".
+    wxString      	current_language_code_safe() const;
 
     virtual bool OnExceptionInMainLoop();
 
diff --git a/src/slic3r/GUI/UpdateDialogs.cpp b/src/slic3r/GUI/UpdateDialogs.cpp
index 0f72b3b35..2ea904007 100644
--- a/src/slic3r/GUI/UpdateDialogs.cpp
+++ b/src/slic3r/GUI/UpdateDialogs.cpp
@@ -55,7 +55,7 @@ MsgUpdateSlic3r::MsgUpdateSlic3r(const Semver &ver_current, const Semver &ver_on
 		auto *link = new wxHyperlinkCtrl(this, wxID_ANY, _(L("Changelog && Download")), url_wx);
 		content_sizer->Add(link);
 	} else {
-		const auto lang_code = wxGetApp().current_language_code().ToStdString();
+		const auto lang_code = wxGetApp().current_language_code_safe().ToStdString();
 
 		const std::string url_log = (boost::format(URL_CHANGELOG) % lang_code).str();
 		const wxString url_log_wx = from_u8(url_log);
@@ -100,7 +100,7 @@ MsgUpdateConfig::MsgUpdateConfig(const std::vector<Update> &updates) :
 	content_sizer->Add(text);
 	content_sizer->AddSpacer(VERT_SPACING);
 
-	const auto lang_code = wxGetApp().current_language_code().ToStdString();
+	const auto lang_code = wxGetApp().current_language_code_safe().ToStdString();
 
 	auto *versions = new wxBoxSizer(wxVERTICAL);
 	for (const auto &update : updates) {