add rename playlists feature

4 files changed, 181 insertions, 65 deletions

diff --git a/README.md b/README.md
index e65e051..2b25aeb 100755
--- a/README.md
+++ b/README.md
@@ -39,5 +39,5 @@ A MPD client in Rust
 - [x] search for songs
 - [x] Human readable time format
 - [x] metadata based tree view
-- [ ] view playlist
-- [ ] change playlist name
+- [x] view playlist
+- [x] change playlist name
diff --git a/src/app.rs b/src/app.rs
index 35661e1..be55e7d 100755
--- a/src/app.rs
+++ b/src/app.rs
@@ -21,9 +21,11 @@ pub struct App {
     pub selected_tab: SelectedTab,       // Used to switch between tabs
 
     // Search
-    pub inputmode: InputMode,   // Defines input mode, Normal or Search
-    pub search_input: String,   // Stores the userinput to be searched
-    pub cursor_position: usize, // Stores the cursor position
+    pub inputmode: InputMode,     // Defines input mode, Normal or Search
+    pub search_input: String,     // Stores the userinput to be searched
+    pub search_cursor_pos: usize, // Stores the cursor position for searching
+    pub pl_newname_input: String, // Stores the new name of the playlist
+    pub pl_cursor_pos: usize,     // Stores the cursor position for renaming playlist
 
     // playlist variables
     // used to show playlist popup
@@ -59,7 +61,9 @@ impl App {
             browser,
             inputmode: InputMode::Normal,
             search_input: String::new(),
-            cursor_position: 0,
+            pl_newname_input: String::new(),
+            search_cursor_pos: 0,
+            pl_cursor_pos: 0,
             playlist_popup: false,
             append_list,
         })
@@ -97,7 +101,7 @@ impl App {
         Self::get_queue(&mut self.conn, &mut self.queue_list.list);
     }
 
-    fn get_playlist(conn: &mut Client) -> AppResult<Vec<String>> {
+    pub fn get_playlist(conn: &mut Client) -> AppResult<Vec<String>> {
         let list: Vec<String> = conn.playlists()?.iter().map(|p| p.clone().name).collect();
         Ok(list)
     }
@@ -220,49 +224,111 @@ impl App {
 
     // Cursor movements
     pub fn move_cursor_left(&mut self) {
-        let cursor_moved_left = self.cursor_position.saturating_sub(1);
-        self.cursor_position = self.clamp_cursor(cursor_moved_left);
+        match self.inputmode {
+            InputMode::PlaylistRename => {
+                let cursor_moved_left = self.pl_cursor_pos.saturating_sub(1);
+                self.pl_cursor_pos = self.clamp_cursor(cursor_moved_left);
+            }
+            InputMode::Editing => {
+                let cursor_moved_left = self.search_cursor_pos.saturating_sub(1);
+                self.search_cursor_pos = self.clamp_cursor(cursor_moved_left);
+            }
+            _ => {}
+        }
     }
 
     pub fn move_cursor_right(&mut self) {
-        let cursor_moved_right = self.cursor_position.saturating_add(1);
-        self.cursor_position = self.clamp_cursor(cursor_moved_right);
+        match self.inputmode {
+            InputMode::PlaylistRename => {
+                let cursor_moved_right = self.pl_cursor_pos.saturating_add(1);
+                self.pl_cursor_pos = self.clamp_cursor(cursor_moved_right);
+            }
+            InputMode::Editing => {
+                let cursor_moved_right = self.search_cursor_pos.saturating_add(1);
+                self.search_cursor_pos = self.clamp_cursor(cursor_moved_right);
+            }
+            _ => {}
+        }
     }
 
     pub fn enter_char(&mut self, new_char: char) {
-        self.search_input.insert(self.cursor_position, new_char);
-
-        self.move_cursor_right();
+        match self.inputmode {
+            InputMode::PlaylistRename => {
+                self.pl_newname_input.insert(self.pl_cursor_pos, new_char);
+                self.move_cursor_right();
+            }
+            InputMode::Editing => {
+                self.search_input.insert(self.search_cursor_pos, new_char);
+                self.move_cursor_right();
+            }
+            _ => {}
+        }
     }
 
     pub fn delete_char(&mut self) {
-        let is_not_cursor_leftmost = self.cursor_position != 0;
+        let is_not_cursor_leftmost = match self.inputmode {
+            InputMode::PlaylistRename => self.pl_cursor_pos != 0,
+            InputMode::Editing => self.search_cursor_pos != 0,
+            _ => false,
+        };
+
         if is_not_cursor_leftmost {
             // Method "remove" is not used on the saved text for deleting the selected char.
             // Reason: Using remove on String works on bytes instead of the chars.
             // Using remove would require special care because of char boundaries.
 
-            let current_index = self.cursor_position;
-            let from_left_to_current_index = current_index - 1;
+            let current_index = match self.inputmode {
+                InputMode::Editing => self.search_cursor_pos,
+                InputMode::PlaylistRename => self.pl_cursor_pos,
+                _ => 0,
+            };
 
-            // Getting all characters before the selected character.
-            let before_char_to_delete = self.search_input.chars().take(from_left_to_current_index);
-            // Getting all characters after selected character.
-            let after_char_to_delete = self.search_input.chars().skip(current_index);
+            let from_left_to_current_index = current_index - 1;
 
-            // Put all characters together except the selected one.
-            // By leaving the selected one out, it is forgotten and therefore deleted.
-            self.search_input = before_char_to_delete.chain(after_char_to_delete).collect();
-            self.move_cursor_left();
+            if self.inputmode == InputMode::PlaylistRename {
+                // Getting all characters before the selected character.
+                let before_char_to_delete = self
+                    .pl_newname_input
+                    .chars()
+                    .take(from_left_to_current_index);
+                // Getting all characters after selected character.
+                let after_char_to_delete = self.pl_newname_input.chars().skip(current_index);
+                // Put all characters together except the selected one.
+                // By leaving the selected one out, it is forgotten and therefore deleted.
+                self.pl_newname_input = before_char_to_delete.chain(after_char_to_delete).collect();
+                self.move_cursor_left();
+            } else if self.inputmode == InputMode::Editing {
+                // Getting all characters before the selected character.
+                let before_char_to_delete =
+                    self.search_input.chars().take(from_left_to_current_index);
+                // Getting all characters after selected character.
+                let after_char_to_delete = self.search_input.chars().skip(current_index);
+                // Put all characters together except the selected one.
+                // By leaving the selected one out, it is forgotten and therefore deleted.
+                self.search_input = before_char_to_delete.chain(after_char_to_delete).collect();
+                self.move_cursor_left();
+            }
         }
     }
 
     pub fn clamp_cursor(&self, new_cursor_pos: usize) -> usize {
-        new_cursor_pos.clamp(0, self.search_input.len())
+        match self.inputmode {
+            InputMode::PlaylistRename => new_cursor_pos.clamp(0, self.pl_newname_input.len()),
+            InputMode::Editing => new_cursor_pos.clamp(0, self.search_input.len()),
+            _ => 0,
+        }
     }
 
     pub fn reset_cursor(&mut self) {
-        self.cursor_position = 0;
+        match self.inputmode {
+            InputMode::Editing => {
+                self.search_cursor_pos = 0;
+            }
+            InputMode::PlaylistRename => {
+                self.pl_cursor_pos = 0;
+            }
+            _ => {}
+        }
     }
 
     /// Given time in seconds, convert it to hh:mm:ss
@@ -277,4 +343,14 @@ impl App {
             format!("{:02}:{:02}:{:02}", h, m, s)
         }
     }
+
+    pub fn change_playlist_name(&mut self) -> AppResult<()> {
+        match self.selected_tab {
+            SelectedTab::Playlists => {
+                self.inputmode = InputMode::PlaylistRename;
+            }
+            _ => {}
+        }
+        Ok(())
+    }
 }
diff --git a/src/handler.rs b/src/handler.rs
index a5c4edb..86ab7cb 100755
--- a/src/handler.rs
+++ b/src/handler.rs
@@ -92,8 +92,8 @@ pub fn handle_key_events(key_event: KeyEvent, app: &mut App) -> AppResult<()> {
                 }
 
                 app.search_input.clear();
-                app.inputmode = InputMode::Normal;
                 app.reset_cursor();
+                app.inputmode = InputMode::Normal;
             }
 
             KeyCode::Backspace => {
@@ -110,10 +110,41 @@ pub fn handle_key_events(key_event: KeyEvent, app: &mut App) -> AppResult<()> {
 
             _ => {}
         }
+    } else if app.inputmode == InputMode::PlaylistRename {
+        match key_event.code {
+            KeyCode::Esc => {
+                app.pl_newname_input.clear();
+                app.reset_cursor();
+                app.inputmode = InputMode::Normal;
+            }
+            KeyCode::Char(to_insert) => {
+                app.enter_char(to_insert);
+            }
+            KeyCode::Enter => {
+                app.conn.conn.pl_rename(app.pl_list.list.get(app.pl_list.index).unwrap(), &app.pl_newname_input)?;
+                app.pl_list.list = App::get_playlist(&mut app.conn.conn)?;
+                app.pl_newname_input.clear();
+                app.reset_cursor();
+                app.inputmode = InputMode::Normal;
+            }
+
+            KeyCode::Backspace => {
+                app.delete_char();
+            }
 
-    // Playlist popup keybinds
-    //
-    // Keybind for when the "append to playlist" popup is visible
+            KeyCode::Left => {
+                app.move_cursor_left();
+            }
+
+            KeyCode::Right => {
+                app.move_cursor_right();
+            }
+
+            _ => {}
+        }
+        // Playlist popup keybinds
+        //
+        // Keybind for when the "append to playlist" popup is visible
     } else if app.playlist_popup {
         match key_event.code {
             KeyCode::Char('q') | KeyCode::Esc => {
@@ -358,7 +389,11 @@ pub fn handle_key_events(key_event: KeyEvent, app: &mut App) -> AppResult<()> {
 
             // Search for songs
             KeyCode::Char('/') => {
-                app.inputmode = InputMode::toggle_editing_states(&app.inputmode);
+                if app.inputmode == InputMode::Normal {
+                    app.inputmode = InputMode::Editing;
+                } else {
+                    app.inputmode = InputMode::Normal;
+                }
             }
 
             // Remove from Current Playlsit
@@ -366,9 +401,6 @@ pub fn handle_key_events(key_event: KeyEvent, app: &mut App) -> AppResult<()> {
                 app.handle_add_or_remove_from_current_playlist()?;
             }
 
-            // Change playlist name
-            KeyCode::Char('e') => if app.selected_tab == SelectedTab::Playlists {},
-
             // go to top of list
             KeyCode::Char('g') => match app.selected_tab {
                 SelectedTab::Queue => app.queue_list.index = 0,
@@ -384,6 +416,9 @@ pub fn handle_key_events(key_event: KeyEvent, app: &mut App) -> AppResult<()> {
                 }
                 SelectedTab::Playlists => app.pl_list.index = app.pl_list.list.len() - 1,
             },
+
+            // Change playlist name
+            KeyCode::Char('e') => app.change_playlist_name()?,
             _ => {}
         }
     }
diff --git a/src/ui.rs b/src/ui.rs
index 9acf6a1..51a0fed 100755
--- a/src/ui.rs
+++ b/src/ui.rs
@@ -11,15 +11,7 @@ use ratatui::{
 pub enum InputMode {
     Editing,
     Normal,
-}
-
-impl InputMode {
-    pub fn toggle_editing_states(state: &InputMode) -> InputMode {
-        match state {
-            InputMode::Editing => return InputMode::Normal,
-            InputMode::Normal => return InputMode::Editing,
-        };
-    }
+    PlaylistRename,
 }
 
 /// Renders the user interface widgets
@@ -32,7 +24,6 @@ pub fn render(app: &mut App, frame: &mut Frame) {
 
     match app.selected_tab {
         SelectedTab::Queue => draw_queue(frame, app, layout[0]),
-        // SelectedTab::Playlists => draw_playlists(frame, app, layout[0]),
         SelectedTab::Playlists => draw_playlist_viewer(frame, app, layout[0]),
         SelectedTab::DirectoryBrowser => draw_directory_browser(frame, app, layout[0]),
     }
@@ -44,6 +35,9 @@ pub fn render(app: &mut App, frame: &mut Frame) {
         InputMode::Editing => {
             draw_search_bar(frame, app, layout[1]);
         }
+        InputMode::PlaylistRename => {
+            draw_rename_playlist(frame, app, layout[1]);
+        }
     }
 
     if app.playlist_popup {
@@ -254,27 +248,18 @@ fn draw_queue(frame: &mut Frame, app: &mut App, size: Rect) {
     frame.render_stateful_widget(table, size, &mut state);
 }
 
-
 // Draw search bar
 fn draw_search_bar(frame: &mut Frame, app: &mut App, size: Rect) {
-    match app.inputmode {
-        InputMode::Normal =>
-            // Hide the cursor. `Frame` does this by default, so we don't need to do anything here
-            {}
-
-        InputMode::Editing => {
-            // Make the cursor visible and ask ratatui to put it at the specified coordinates after
-            // rendering
-            #[allow(clippy::cast_possible_truncation)]
-            frame.set_cursor(
-                // Draw the cursor at the current position in the input field.
-                // This position is can be controlled via the left and right arrow key
-                size.x + app.cursor_position as u16 + 2,
-                // Move one line down, from the border to the input line
-                size.y + 1,
-            );
-        }
-    }
+    // Make the cursor visible and ask ratatui to put it at the specified coordinates after
+    // rendering
+    #[allow(clippy::cast_possible_truncation)]
+    frame.set_cursor(
+        // Draw the cursor at the current position in the input field.
+        // This position is can be controlled via the left and right arrow key
+        size.x + app.search_cursor_pos as u16 + 2,
+        // Move one line down, from the border to the input line
+        size.y + 1,
+    );
 
     let input = Paragraph::new("/".to_string() + &app.search_input)
         .style(Style::default())
@@ -399,7 +384,7 @@ fn draw_playlist_viewer(frame: &mut Frame, app: &mut App, area: Rect) {
     let table = Table::new(
         rows,
         vec![
-            Constraint::Percentage(40),
+            Constraint::Min(40),
             Constraint::Percentage(40),
             Constraint::Percentage(20),
         ],
@@ -439,6 +424,26 @@ fn draw_add_to_playlist(frame: &mut Frame, app: &mut App, area: Rect) {
     frame.render_stateful_widget(list, area, &mut state);
 }
 
+fn draw_rename_playlist(frame: &mut Frame, app: &mut App, area: Rect) {
+    #[allow(clippy::cast_possible_truncation)]
+    frame.set_cursor(
+        // Draw the cursor at the current position in the input field.
+        // This position is can be controlled via the left and right arrow key
+        area.x + app.pl_cursor_pos as u16 + 2,
+        // Move one line down, from the border to the input line
+        area.y + 1,
+    );
+
+    let input = Paragraph::new("/".to_string() + &app.pl_newname_input)
+        .style(Style::default())
+        .block(
+            Block::default()
+                .borders(Borders::ALL)
+                .title("Enter New Name: ".bold().green()),
+        );
+    frame.render_widget(input, area);
+}
+
 fn centered_rect(percent_x: u16, percent_y: u16, r: Rect) -> Rect {
     let popup_layout = Layout::vertical([
         Constraint::Percentage((100 - percent_y) / 2),