Support for SimplyPrint cloud integration (#4525)

* Make httpserver more generic and reusable

* Add OAuthJob

* Fix issue caused by the fact that the backing widget of the `TextCtrl` is no longer `wxTextCtrl`

* Implement login and token refresh

* Implement file upload

* Try fix build error

* Support BBL printers

* Show error message if user hasn't done OAuth

* Fix typo

* Update error message

* Disable unsupported options when SimplyPrint is selected

src/slic3r/GUI/Jobs/OAuthJob.hpp

@@ -0,0 +1,62 @@
+#ifndef __OAuthJob_HPP__
+#define __OAuthJob_HPP__
+
+#include "Job.hpp"
+#include "slic3r/GUI/HttpServer.hpp"
+
+namespace Slic3r {
+namespace GUI {
+
+class Plater;
+
+struct OAuthParams
+{
+    std::string login_url;
+    std::string client_id;
+    boost::asio::ip::port_type callback_port;
+    std::string callback_url;
+    std::string scope;
+    std::string response_type;
+    std::string auth_success_redirect_url;
+    std::string auth_fail_redirect_url;
+    std::string token_url;
+    std::string verification_code;
+    std::string state;
+};
+
+struct OAuthResult
+{
+    bool        success{false};
+    std::string error_message{""};
+    std::string access_token{""};
+    std::string refresh_token{""};
+};
+
+struct OAuthData
+{
+    OAuthParams params;
+    std::shared_ptr<OAuthResult> result;
+};
+
+class OAuthJob : public Job
+{
+    HttpServer local_authorization_server;
+    OAuthData  _data;
+    wxWindow*  m_event_handle{nullptr};
+
+public:
+    explicit OAuthJob(const OAuthData& input);
+    
+    void process(Ctl& ctl) override;
+    void finalize(bool canceled, std::exception_ptr& e) override;
+
+    void set_event_handle(wxWindow* hanle) { m_event_handle = hanle; }
+
+    static void parse_token_response(const std::string& body, bool error, OAuthResult& result);
+};
+
+wxDECLARE_EVENT(EVT_OAUTH_COMPLETE_MESSAGE, wxCommandEvent);
+
+}} // namespace Slic3r::GUI
+
+#endif // OAUTHJOB_HPP