Support Secure WebSocket

Add full WSS support to public server list (using wss_port, overriding
insecure port), favorite servers list, and direct connections, and show
which servers are secure.

Revert the upstream's removal of `legacy` ServerInfo field, as I use it
to filter out legacy servers. To differentiate schemes, the `scheme`
field is used, either "ws" or "wss". I don't see the reason to add "tcp"
protocol when we don't even support it.

For the UI, add icons for secure and insecure connections. Highlight
secure servers with a green background.

In the favorite server dialog, a checkbox was added to select whether
the server is using WSS.

In the direct connection dialog, support "wss" scheme and default ports:
80 for WS, 443 for WSS, as per the WebSocket specification.

3 files changed, 13 insertions, 7 deletions

diff --git a/src/widgets/direct_connect_dialog.cpp b/src/widgets/direct_connect_dialog.cpp
index f8c77b85..9859889d 100644
--- a/src/widgets/direct_connect_dialog.cpp
+++ b/src/widgets/direct_connect_dialog.cpp
@@ -51,7 +51,7 @@ void DirectConnectDialog::onConnectPressed()
   QString l_hostname = ui_direct_hostname_edit->text();
   if (!SCHEME_PATTERN.match(l_hostname).hasMatch())
   {
-    l_hostname = "ws://" % l_hostname;
+    l_hostname = "wss://" % l_hostname;
   }
 
   QUrl l_url(l_hostname);
@@ -61,20 +61,21 @@ void DirectConnectDialog::onConnectPressed()
     return;
   }
 
-  if (l_url.scheme() != "ws")
+  if (l_url.scheme() != "ws" && l_url.scheme() != "wss")
   {
-    call_error(tr("Invalid URL scheme. Only ws:// is supported."));
+    call_error(tr("Invalid URL scheme. Only ws: and wss: are supported."));
     return;
   }
 
-  if (l_url.port() == -1)
+  int port = l_url.port();
+  if (port == -1)
   {
-    call_error(tr("Invalid server port."));
-    return;
+    port = (l_url.scheme() == "wss") ? 443 : 80;
   }
   ServerInfo l_server;
   l_server.address = l_url.host();
-  l_server.port = l_url.port();
+  l_server.port = port;
+  l_server.scheme = l_url.scheme();
   l_server.name = "Direct Connection";
 
   net_manager->connect_to_server(l_server);
diff --git a/src/widgets/server_editor_dialog.cpp b/src/widgets/server_editor_dialog.cpp
index 03c8d6c6..8f987f6a 100644
--- a/src/widgets/server_editor_dialog.cpp
+++ b/src/widgets/server_editor_dialog.cpp
@@ -31,6 +31,7 @@ ServerEditorDialog::ServerEditorDialog(QWidget *parent)
   FROM_UI(QLineEdit, name);
   FROM_UI(QLineEdit, hostname);
   FROM_UI(QSpinBox, port);
+  FROM_UI(QCheckBox, secure_cb);
   FROM_UI(QPlainTextEdit, description);
   FROM_UI(QDialogButtonBox, button_box);
 
@@ -49,6 +50,7 @@ ServerEditorDialog::ServerEditorDialog(const ServerInfo &server, QWidget *parent
   ui_name->setText(server.name);
   ui_hostname->setText(server.address);
   ui_port->setValue(server.port);
+  ui_secure_cb->setChecked(server.scheme == "wss");
   ui_description->setPlainText(server.description);
 }
 
@@ -58,6 +60,7 @@ ServerInfo ServerEditorDialog::currentServerInfo() const
   server.name = ui_name->text();
   server.address = ui_hostname->text();
   server.port = ui_port->value();
+  server.scheme = ui_secure_cb->isChecked() ? "wss" : "ws";
   server.description = ui_description->toPlainText();
   return server;
 }
diff --git a/src/widgets/server_editor_dialog.h b/src/widgets/server_editor_dialog.h
index a8844d4b..7b0bb651 100644
--- a/src/widgets/server_editor_dialog.h
+++ b/src/widgets/server_editor_dialog.h
@@ -2,6 +2,7 @@
 
 #include "network/serverinfo.h"
 
+#include <QCheckBox>
 #include <QComboBox>
 #include <QDialog>
 #include <QDialogButtonBox>
@@ -29,6 +30,7 @@ private:
   QLineEdit *ui_name;
   QLineEdit *ui_hostname;
   QSpinBox *ui_port;
+  QCheckBox *ui_secure_cb;
   QPlainTextEdit *ui_description;
   QDialogButtonBox *ui_button_box;