Add edit and delete instructions

src/main.rs

@@ -70,18 +70,35 @@ enum Field {
     Command,
 }
 
-struct AddForm {
+#[derive(Clone, Copy)]
+enum CommandFormTarget {
+    New,
+    Existing(usize),
+}
+
+struct CommandForm {
     alias: Input,
     command: Input,
     field: Field,
+    target: CommandFormTarget,
 }
 
-impl AddForm {
+impl CommandForm {
     fn new() -> Self {
         Self {
             alias: Input::default(),
             command: Input::new(String::from("ssh ")),
             field: Field::Alias,
+            target: CommandFormTarget::New,
+        }
+    }
+
+    fn edit(index: usize, command: &Command) -> Self {
+        Self {
+            alias: Input::new(command.alias.clone()),
+            command: Input::new(command.command.clone()),
+            field: Field::Alias,
+            target: CommandFormTarget::Existing(index),
         }
     }
 
@@ -102,7 +119,7 @@ impl AddForm {
 
 enum Mode {
     Normal,
-    Adding(AddForm),
+    Editing(CommandForm),
 }
 
 struct App {
@@ -143,43 +160,70 @@ impl App {
     fn on_key(&mut self, key: KeyEvent) {
         match self.mode {
             Mode::Normal => self.on_key_normal(key.code),
-            Mode::Adding(_) => self.on_key_adding(key),
+            Mode::Editing(_) => self.on_key_editing(key),
         }
     }
 
     fn on_key_normal(&mut self, code: KeyCode) {
         match code {
             KeyCode::Char('q') | KeyCode::Esc => self.should_quit = true,
-            KeyCode::Char('a') => self.mode = Mode::Adding(AddForm::new()),
+            KeyCode::Char('a') => self.mode = Mode::Editing(CommandForm::new()),
+            KeyCode::Char('e') => self.start_editing(),
+            KeyCode::Char('d') => self.delete_selected(),
             KeyCode::Up | KeyCode::Char('k') => self.select_previous(),
             KeyCode::Down | KeyCode::Char('j') => self.select_next(),
             _ => {}
         }
     }
 
-    fn on_key_adding(&mut self, key: KeyEvent) {
+    fn start_editing(&mut self) {
+        if let Some(command) = self.config.commands.get(self.selected) {
+            self.mode = Mode::Editing(CommandForm::edit(self.selected, command));
+        }
+    }
+
+    fn delete_selected(&mut self) {
+        if self.selected < self.config.commands.len() {
+            self.config.commands.remove(self.selected);
+            self.selected = self
+                .selected
+                .min(self.config.commands.len().saturating_sub(1));
+            let _ = self.config.save();
+        }
+    }
+
+    fn on_key_editing(&mut self, key: KeyEvent) {
         match key.code {
             KeyCode::Esc => self.mode = Mode::Normal,
-            KeyCode::Enter => self.confirm_adding(),
+            KeyCode::Enter => self.confirm_editing(),
             KeyCode::Tab | KeyCode::Up | KeyCode::Down => {
-                if let Mode::Adding(form) = &mut self.mode {
+                if let Mode::Editing(form) = &mut self.mode {
                     form.toggle_field();
                 }
             }
             _ => {
-                if let Mode::Adding(form) = &mut self.mode {
+                if let Mode::Editing(form) = &mut self.mode {
                     form.current_mut().handle_event(&Event::Key(key));
                 }
             }
         }
     }
 
-    fn confirm_adding(&mut self) {
-        if let Mode::Adding(form) = &self.mode {
+    fn confirm_editing(&mut self) {
+        if let Mode::Editing(form) = &self.mode {
             let alias = form.alias.value().trim().to_string();
             let command = form.command.value().trim().to_string();
+            let target = form.target;
             if !command.is_empty() {
-                self.config.commands.push(Command { alias, command });
+                match target {
+                    CommandFormTarget::New => self.config.commands.push(Command { alias, command }),
+                    CommandFormTarget::Existing(index) => {
+                        if let Some(existing) = self.config.commands.get_mut(index) {
+                            existing.alias = alias;
+                            existing.command = command;
+                        }
+                    }
+                }
                 let _ = self.config.save();
             }
         }
@@ -216,13 +260,14 @@ fn run(mut terminal: DefaultTerminal) -> std::io::Result<()> {
 fn draw(frame: &mut Frame, app: &App) {
     draw_main(frame, app, frame.area());
 
-    if let Mode::Adding(form) = &app.mode {
-        draw_add_popup(frame, form);
+    match &app.mode {
+        Mode::Normal => {}
+        Mode::Editing(form) => draw_edit_popup(frame, form),
     }
 }
 
 fn draw_main(frame: &mut Frame, app: &App, area: Rect) {
-    let instructions = " [a] Add connection  [q/Esc] Quit ";
+    let instructions = " [a] Add  [e] Edit  [d] Delete  [q/Esc] Quit ";
 
     let block = Block::default()
         .title(" sshmngrs ")
@@ -252,7 +297,7 @@ fn draw_main(frame: &mut Frame, app: &App, area: Rect) {
     frame.render_stateful_widget(list, area, &mut state);
 }
 
-fn draw_add_popup(frame: &mut Frame, form: &AddForm) {
+fn draw_edit_popup(frame: &mut Frame, form: &CommandForm) {
     let area = centered_rect(frame.area(), 60, 6);
     frame.render_widget(Clear, area);