feat: Enhance renamer app with help screen, rename confirmation, and special info formatting

renamer/app.py

@@ -4,16 +4,18 @@ from textual.containers import Horizontal, Container, ScrollableContainer, Verti
 from pathlib import Path
 import threading
 import time
-import concurrent.futures
 
 from .constants import MEDIA_TYPES
-from .screens import OpenScreen
+from .screens import OpenScreen, HelpScreen, RenameConfirmScreen
 from .extractor import MediaExtractor
 from .formatters.media_formatter import MediaFormatter
 from .formatters.proposed_name_formatter import ProposedNameFormatter
 from .formatters.text_formatter import TextFormatter
 
 
+VERSION = "0.2.0"
+
+
 class RenamerApp(App):
     CSS = """
     #left {
@@ -30,12 +32,16 @@ class RenamerApp(App):
         ("q", "quit", "Quit"),
         ("o", "open", "Open directory"),
         ("s", "scan", "Scan"),
-        ("r", "refresh", "Refresh"),
+        ("f", "refresh", "Refresh"),
+        ("r", "rename", "Rename"),
+        ("p", "expand", "Toggle Tree"),
+        ("h", "help", "Help"),
     ]
 
     def __init__(self, scan_dir):
         super().__init__()
         self.scan_dir = Path(scan_dir) if scan_dir else None
+        self.tree_expanded = False
 
     def compose(self) -> ComposeResult:
         with Horizontal():
@@ -57,14 +63,15 @@ class RenamerApp(App):
         self.scan_files()
 
     def scan_files(self):
-        if not self.scan_dir.exists() or not self.scan_dir.is_dir():
+        if not self.scan_dir or not self.scan_dir.exists() or not self.scan_dir.is_dir():
             details = self.query_one("#details", Static)
             details.update("Error: Directory does not exist or is not a directory")
             return
         tree = self.query_one("#file_tree", Tree)
         tree.clear()
         self.build_tree(self.scan_dir, tree.root)
-        tree.root.expand()
+        tree.root.expand()  # Expand root level
+        self.tree_expanded = False  # Sub-levels are collapsed
         self.set_focus(tree)
 
     def build_tree(self, path: Path, node):
@@ -122,7 +129,7 @@ class RenamerApp(App):
             self.call_later(
                 self._update_details,
                 MediaFormatter(extractor).file_info_panel(),
-                ProposedNameFormatter(extractor).rename_line_formatted(),
+                ProposedNameFormatter(extractor).rename_line_formatted(file_path),
             )
         except Exception as e:
             self.call_later(
@@ -158,6 +165,64 @@ class RenamerApp(App):
                 target=self._extract_and_show_details, args=(node.data,)
             ).start()
 
+    async def action_help(self):
+        self.push_screen(HelpScreen())
+
+    async def action_rename(self):
+        tree = self.query_one("#file_tree", Tree)
+        node = tree.cursor_node
+        if node and node.data and isinstance(node.data, Path) and node.data.is_file():
+            # Get the proposed name from the extractor
+            extractor = MediaExtractor(node.data)
+            proposed_formatter = ProposedNameFormatter(extractor)
+            new_name = str(proposed_formatter)
+            if new_name and new_name != node.data.name:
+                self.push_screen(RenameConfirmScreen(node.data, new_name))
+
+    async def action_expand(self):
+        tree = self.query_one("#file_tree", Tree)
+        if self.tree_expanded:
+            # Collapse all sub-levels, keep root expanded
+            def collapse_sub(node):
+                if node != tree.root:
+                    node.collapse()
+                for child in node.children:
+                    collapse_sub(child)
+            collapse_sub(tree.root)
+            self.tree_expanded = False
+        else:
+            # Expand all
+            def expand_all(node):
+                node.expand()
+                for child in node.children:
+                    expand_all(child)
+            expand_all(tree.root)
+            self.tree_expanded = True
+
+    def update_renamed_file(self, old_path: Path, new_path: Path):
+        """Update the tree node for a renamed file."""
+        tree = self.query_one("#file_tree", Tree)
+        
+        def find_node(node):
+            if node.data == old_path:
+                return node
+            for child in node.children:
+                found = find_node(child)
+                if found:
+                    return found
+            return None
+        
+        node = find_node(tree.root)
+        if node:
+            node.label = new_path.name
+            node.data = new_path
+            # If this node is currently selected, refresh the details
+            if tree.cursor_node == node:
+                self._start_loading_animation()
+                threading.Thread(
+                    target=self._extract_and_show_details, args=(new_path,)
+                ).start()
+
     def on_key(self, event):
         if event.key == "right":
             tree = self.query_one("#file_tree", Tree)