feat(modulo): wire up Add to PATH wizard page

espanso-modulo/src/sys/interop/interop.h

@@ -117,4 +117,5 @@ typedef struct WizardMetadata {
   int (*add_to_path)();
   int (*enable_accessibility)();
   int (*is_accessibility_enabled)();
+  void (*on_completed)();
 } WizardMetadata;

espanso-modulo/src/sys/interop/mod.rs

@@ -134,6 +134,7 @@ pub struct WizardMetadata {
   pub add_to_path: extern fn() -> c_int,
   pub enable_accessibility: extern fn() -> c_int,
   pub is_accessibility_enabled: extern fn() -> c_int,
+  pub on_completed: extern fn(),
 }
 
 // Native bindings

espanso-modulo/src/sys/wizard/mod.rs

@@ -76,17 +76,15 @@ pub fn show(options: WizardOptions) {
       .lock()
       .expect("unable to acquire lock in add_to_path method");
     let handlers_ref = (*lock).as_ref().expect("unable to unwrap handlers");
-    // TODO:
-    // if let Some(handler_ref) = handlers_ref.add_to_path.as_ref() {
-    //   if (*handler_ref)() {
-    //     1
-    //   } else {
-    //     0
-    //   }
-    // } else {
-    //   -1
-    // }
-    0
+    if let Some(handler_ref) = handlers_ref.add_to_path.as_ref() {
+      if (*handler_ref)() {
+        1
+      } else {
+        0
+      }
+    } else {
+      -1
+    }
   }
 
   extern "C" fn enable_accessibility() -> c_int {
@@ -125,6 +123,16 @@ pub fn show(options: WizardOptions) {
     0
   }
 
+  extern "C" fn on_completed() {
+    let lock = HANDLERS
+      .lock()
+      .expect("unable to acquire lock in on_completed method");
+    let handlers_ref = (*lock).as_ref().expect("unable to unwrap handlers");
+    if let Some(handler_ref) = handlers_ref.on_completed.as_ref() {
+      (*handler_ref)()
+    }
+  }
+  
   {
     let mut lock = HANDLERS.lock().expect("unable to acquire handlers lock");
     *lock = Some(options.handlers)
@@ -174,6 +182,7 @@ pub fn show(options: WizardOptions) {
     add_to_path,
     enable_accessibility,
     is_accessibility_enabled,
+    on_completed,
   };
 
   unsafe {

espanso-modulo/src/sys/wizard/wizard.cpp

@@ -98,6 +98,7 @@ protected:
   void welcome_start_clicked(wxCommandEvent &event);
   void migrate_button_clicked(wxCommandEvent &event);
   void migrate_compatibility_mode_clicked(wxCommandEvent &event);
+	void add_path_continue_clicked( wxCommandEvent& event );
 
   void navigate_to_next_page_or_close();
   void change_default_button(int target_page);
@@ -180,6 +181,41 @@ void DerivedFrame::migrate_button_clicked(wxCommandEvent &event)
   }
 }
 
+void DerivedFrame::add_path_continue_clicked( wxCommandEvent& event ) {
+  if (!add_path_checkbox->IsChecked()) {
+    this->navigate_to_next_page_or_close();
+    return;
+  } 
+
+  if (metadata->add_to_path)
+  {
+    while (true) {
+      int result = metadata->add_to_path();
+      if (result == 1)
+      {
+        this->navigate_to_next_page_or_close();
+        return;
+      }
+      else 
+      {
+        wxMessageDialog* dialog = new wxMessageDialog(this,
+          "An error occurred while registering the 'espanso' command to the PATH, please check the logs for more information.\nDo you want to retry? You can always add espanso to the PATH later",
+          "Operation failed",
+          wxCENTER | wxOK_DEFAULT | wxOK | wxCANCEL |
+          wxICON_EXCLAMATION);
+
+        dialog->SetOKLabel("Retry");
+
+        int prompt_result = dialog->ShowModal(); 
+        if (prompt_result == wxID_CANCEL) {
+          this->navigate_to_next_page_or_close();
+          break;
+        }
+      }
+    }
+  }
+}
+
 void DerivedFrame::check_timer_tick(wxTimerEvent &event)
 {
   if (this->m_simplebook->GetSelection() == LEGACY_VERSION_PAGE_INDEX)

espanso-modulo/src/wizard/mod.rs

@@ -43,6 +43,7 @@ pub struct WizardHandlers {
   pub add_to_path: Option<Box<dyn Fn() -> bool + Send>>,
   pub enable_accessibility: Option<Box<dyn Fn() + Send>>,
   pub is_accessibility_enabled: Option<Box<dyn Fn() -> bool + Send>>,
+  pub on_completed: Option<Box<dyn Fn() + Send>>,
 }
 
 #[derive(Debug)]