1 files changed, 158 insertions, 0 deletions
diff --git a/src/dialogs.rs b/src/dialogs.rs
new file mode 100644
index 0000000..cb3f191
--- /dev/null
+++ b/src/dialogs.rs
@@ -0,0 +1,158 @@
+//! Dialog helper functions for file operations and error display.
+
+use std::path::PathBuf;
+
+use gtk::prelude::*;
+use relm4::{ComponentSender, gtk};
+
+use crate::actions::Action;
+use crate::constants;
+use crate::file_registry;
+use crate::AppModel;
+
+/// Creates a file filter for .wmap files.
+pub fn create_file_filter() -> gtk::FileFilter {
+    let filter = gtk::FileFilter::new();
+    filter.add_pattern(&format!("*.{}", constants::FILE_EXTENSION));
+    filter.add_mime_type(constants::MIME_TYPE);
+    filter.set_name(Some("Wardley Map Files"));
+    filter
+}
+
+/// Shows an error dialog with the given title and message.
+pub fn show_error(window: &gtk::Window, title: &str, message: &str) {
+    let dialog = gtk::MessageDialog::new(
+        Some(window),
+        gtk::DialogFlags::MODAL | gtk::DialogFlags::DESTROY_WITH_PARENT,
+        gtk::MessageType::Error,
+        gtk::ButtonsType::Ok,
+        message,
+    );
+    dialog.set_title(Some(title));
+    dialog.connect_response(|dialog, _| {
+        dialog.close();
+    });
+    dialog.show();
+}
+
+/// Shows a file open dialog and handles the response.
+pub fn show_open_dialog(
+    window: &gtk::Window,
+    is_empty_document: bool,
+    sender: ComponentSender<AppModel>,
+) {
+    let dialog = gtk::FileChooserDialog::new(
+        Some("Open Map"),
+        Some(window),
+        gtk::FileChooserAction::Open,
+        &[
+            ("Cancel", gtk::ResponseType::Cancel),
+            ("Open", gtk::ResponseType::Accept),
+        ],
+    );
+    dialog.add_filter(&create_file_filter());
+
+    dialog.connect_response(move |dialog, response| {
+        dialog.close();
+        if response == gtk::ResponseType::Accept
+            && let Some(file) = dialog.file()
+            && let Some(path) = file.path()
+        {
+            // Check if file is already open - if so, focus that window
+            if let Some(existing_window) = file_registry::find_window_for_file(&path) {
+                existing_window.present();
+                return;
+            }
+
+            if is_empty_document {
+                sender.input(Action::LoadFile(path));
+            } else {
+                AppModel::open_new_window(Some(path));
+            }
+        }
+    });
+    dialog.present();
+}
+
+/// Shows a file save dialog and handles the response.
+pub fn show_save_dialog(
+    window: &gtk::Window,
+    current_file: Option<PathBuf>,
+    close_after: bool,
+    sender: ComponentSender<AppModel>,
+) {
+    let dialog = gtk::FileChooserDialog::new(
+        Some("Save Map As"),
+        Some(window),
+        gtk::FileChooserAction::Save,
+        &[
+            ("Cancel", gtk::ResponseType::Cancel),
+            ("Save", gtk::ResponseType::Accept),
+        ],
+    );
+    dialog.add_filter(&create_file_filter());
+
+    if let Some(ref current_path) = current_file {
+        if let Some(parent) = current_path.parent() {
+            let folder = gtk::gio::File::for_path(parent);
+            dialog.set_current_folder(Some(&folder)).ok();
+        }
+        if let Some(filename) = current_path.file_name() {
+            dialog.set_current_name(filename.to_str().unwrap_or("map.wmap"));
+        }
+    } else {
+        dialog.set_current_name("map.wmap");
+    }
+
+    dialog.connect_response(move |dialog, response| {
+        dialog.close();
+        if response == gtk::ResponseType::Accept
+            && let Some(file) = dialog.file()
+            && let Some(path) = file.path()
+        {
+            sender.input(Action::SaveToFile { path, close_after });
+        }
+    });
+    dialog.present();
+}
+
+/// Shows a dialog asking whether to save unsaved changes before closing.
+pub fn show_unsaved_changes_dialog(
+    window: &gtk::Window,
+    current_file: Option<PathBuf>,
+    sender: ComponentSender<AppModel>,
+) {
+    let dialog = gtk::MessageDialog::new(
+        Some(window),
+        gtk::DialogFlags::MODAL | gtk::DialogFlags::DESTROY_WITH_PARENT,
+        gtk::MessageType::Warning,
+        gtk::ButtonsType::None,
+        "Save changes before closing?",
+    );
+    dialog.set_title(Some("Unsaved Changes"));
+    dialog.add_button("Don't Save", gtk::ResponseType::Reject);
+    dialog.add_button("Cancel", gtk::ResponseType::Cancel);
+    dialog.add_button("Save", gtk::ResponseType::Accept);
+
+    let window = window.clone();
+    dialog.connect_response(move |dialog, response| {
+        dialog.close();
+        match response {
+            gtk::ResponseType::Accept => {
+                if current_file.is_some() {
+                    sender.input(Action::Save { close_after: true });
+                } else {
+                    sender.input(Action::SaveAs { close_after: true });
+                }
+            }
+            gtk::ResponseType::Reject => {
+                if let Some(ref path) = current_file {
+                    file_registry::unregister_file(path);
+                }
+                window.destroy();
+            }
+            _ => {}
+        }
+    });
+    dialog.show();
+}