Added update checker

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@88 0fc631ac-6414-0410-93d0-97cfa31319b6

src/gui/update_checker.cpp

@@ -0,0 +1,135 @@
+//+----------------------------------------------------------------------------+
+//| Description:  Magic Set Editor - Program to make Magic (tm) cards          |
+//| Copyright:    (C) 2001 - 2006 Twan van Laarhoven                           |
+//| License:      GNU General Public License 2 or later (see file COPYING)     |
+//+----------------------------------------------------------------------------+
+
+// ----------------------------------------------------------------------------- : Includes
+
+#include <gui/update_checker.hpp>
+#include <data/settings.hpp>
+#include <util/version.hpp>
+#include <wx/dialup.h>
+#include <wx/url.h>
+#include <wx/html/htmlwin.h>
+
+DECLARE_POINTER_TYPE(VersionData);
+
+// ----------------------------------------------------------------------------- : Update data
+
+/// Information on the latest availible version
+class VersionData {
+  public:
+	Version version;				///< Latest version number
+	String  description;			///< html description
+	String  new_updates_url;		///< updates url has moved?
+	
+	DECLARE_REFLECTION();
+};
+
+IMPLEMENT_REFLECTION(VersionData) {
+	REFLECT(version);
+	REFLECT(description);
+	REFLECT(new_updates_url);
+}
+
+// The information for the latest version
+VersionDataP update_version_data;
+// Is update checking in progress?
+volatile bool checking_updates = false;
+
+// ----------------------------------------------------------------------------- : Update checking
+
+// Thread to retrieve update information
+// Checks if the current version is the latest version
+// If not, displays a message
+class CheckUpdateThread : public wxThread {
+  public:
+	virtual void* Entry() {
+		Work();
+		return 0;;
+	}
+	
+	static void Work() {
+		if (checking_updates) return; // don't check multiple times simultaniously
+		checking_updates = true;
+		try {
+			wxURL url(settings.updates_url);
+			wxInputStream* isP = url.GetInputStream();
+			if (!isP) return; // failed to get data
+			InputStreamP is(isP);
+			// Read version data
+			VersionDataP version_data;
+			Reader reader(is, _("updates"));
+			reader.handle(version_data);
+			// has the updates url changed?
+			if (!version_data->new_updates_url.empty()) {
+				settings.updates_url = version_data->new_updates_url;
+			}
+			// Make available
+			update_version_data = version_data;
+		} catch (...) {
+			// ignore all errors, we don't want problems if update checking fails
+		}
+		checking_updates = false;
+	}
+};
+
+void check_updates() {
+	if (settings.check_updates == CHECK_ALWAYS) {
+		check_updates_now();
+	} else if (settings.check_updates == CHECK_IF_CONNECTED) {
+		// only if internet connection exists
+		wxDialUpManager* dum = wxDialUpManager::Create();
+		if (dum->IsOk() && dum->IsOnline()) {
+			check_updates_now();
+		}
+		delete dum;
+	}
+}
+
+void check_updates_now(bool async) {
+	wxSocketBase::Initialize();
+	if (async) {
+		CheckUpdateThread* thread = new CheckUpdateThread;
+		thread->Create();
+		thread->Run();
+	} else {
+		CheckUpdateThread::Work();
+	}
+}
+
+
+// ----------------------------------------------------------------------------- : Dialog
+
+// A HTML control that opens all pages in an actual browser
+struct HtmlWindowToBrowser : public wxHtmlWindow {
+	HtmlWindowToBrowser(Window* parent, int id, const wxPoint& pos, const wxSize& size, long flags)
+		: wxHtmlWindow(parent, id, pos, size, flags)
+	{}
+	
+	virtual void OnLinkClicked(const wxHtmlLinkInfo& info) {
+		wxLaunchDefaultBrowser( info.GetHref() );
+	}
+};
+
+void show_update_dialog(Window* parent) {
+	if (!update_version_data) return;
+	if (update_version_data->version <= app_version) return; // we already have the latest version
+	// Show update dialog
+	wxDialog* dlg = new wxDialog(parent, wxID_ANY, _("Updates availible"), wxDefaultPosition);
+	// controls
+	wxHtmlWindow* html = new HtmlWindowToBrowser(dlg, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxHW_SCROLLBAR_AUTO | wxSUNKEN_BORDER);
+	html->SetPage(update_version_data->description);
+	wxButton* close = new wxButton(dlg, wxID_OK, _("&Close"));
+	close->SetDefault();
+	// layout
+	wxSizer* s = new wxBoxSizer(wxVERTICAL);
+	s->Add(html, 1, wxEXPAND | wxALL, 8);
+	s->Add(close, 0, wxALIGN_RIGHT | wxALL & ~wxTOP, 8);
+	dlg->SetSizer(s);
+	dlg->SetSize(400,400);
+	dlg->Show();
+	// And never show it again this run
+	update_version_data = VersionDataP();
+}