v0.2 - drop fingerprinting, add LUFS cart normalisation, playlist save/load, editable history with TXT+CSV export

playlist_widget.py

@@ -8,6 +8,7 @@ from PySide6.QtWidgets import (
 )
 from PySide6.QtCore import Qt, QTimer
 from PySide6.QtGui import QFont, QColor, QAction
+import json
 import os
 
 
@@ -264,6 +265,17 @@ class BasePlaylistPanel(QWidget):
         else:
             item.setForeground(QColor("#cccccc"))
 
+    def get_filepaths(self, lst: QListWidget) -> list:
+        paths = []
+        for i in range(lst.count()):
+            item = lst.item(i)
+            if isinstance(item, PlaylistItem):
+                paths.append(item.filepath)
+        return paths
+
+    def clear_list(self, lst: QListWidget):
+        lst.clear()
+
 
 # ─────────────────────────────────────────
 # TRACK PLAYLIST PANEL
@@ -574,18 +586,58 @@ class CartPlaylistPanel(BasePlaylistPanel):
 # ─────────────────────────────────────────
 
 class PlaylistWidget(QWidget):
+    PLAYLIST_JSON_FILTER = "JSON Files (*.json)"
+
     def __init__(self, engine, deck_widgets: dict,
                  cart_slots: list, parent=None):
         super().__init__(parent)
         self.engine = engine
 
-        # Expandable - no fixed width
         self.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
         self.setMinimumWidth(200)
 
         root = QVBoxLayout(self)
         root.setContentsMargins(0, 0, 0, 0)
-        root.setSpacing(0)
+        root.setSpacing(4)
+
+        # Toolbar
+        bar = QHBoxLayout()
+        bar.setSpacing(4)
+
+        self._save_btn = QPushButton("SAVE")
+        self._save_btn.setFixedHeight(28)
+        self._save_btn.setFont(QFont("Arial", 9, QFont.Bold))
+        self._save_btn.setStyleSheet("""
+            QPushButton {
+                background-color: #2a4a2a;
+                color: #aaaaaa;
+                border: 1px solid #444;
+                border-radius: 3px;
+                padding: 0 10px;
+            }
+            QPushButton:hover { background-color: #3a5a3a; }
+        """)
+        self._save_btn.clicked.connect(self._save_playlist)
+
+        self._load_btn = QPushButton("LOAD")
+        self._load_btn.setFixedHeight(28)
+        self._load_btn.setFont(QFont("Arial", 9, QFont.Bold))
+        self._load_btn.setStyleSheet("""
+            QPushButton {
+                background-color: #3a2a2a;
+                color: #aaaaaa;
+                border: 1px solid #444;
+                border-radius: 3px;
+                padding: 0 10px;
+            }
+            QPushButton:hover { background-color: #4a3a3a; }
+        """)
+        self._load_btn.clicked.connect(self._load_playlist)
+
+        bar.addWidget(self._save_btn)
+        bar.addWidget(self._load_btn)
+        bar.addStretch()
+        root.addLayout(bar)
 
         splitter = QSplitter(Qt.Vertical)
         splitter.setStyleSheet("""
@@ -602,4 +654,51 @@ class PlaylistWidget(QWidget):
         splitter.addWidget(self.cart_panel)
         splitter.setSizes([600, 400])
 
-        root.addWidget(splitter)
+        root.addWidget(splitter)
+
+    def _save_playlist(self):
+        path, _ = QFileDialog.getSaveFileName(
+            self, "Save Playlist",
+            os.path.expanduser("~/playlist.json"),
+            self.PLAYLIST_JSON_FILTER
+        )
+        if not path:
+            return
+        data = {
+            "version": 1,
+            "tracks": self.track_panel.get_filepaths(self.track_panel.playlist),
+            "cart_tracks": self.cart_panel.get_filepaths(self.cart_panel.playlist),
+        }
+        with open(path, 'w') as f:
+            json.dump(data, f, indent=2)
+
+    def _load_playlist(self):
+        path, _ = QFileDialog.getOpenFileName(
+            self, "Load Playlist",
+            os.path.expanduser("~"),
+            self.PLAYLIST_JSON_FILTER
+        )
+        if not path:
+            return
+        try:
+            with open(path) as f:
+                data = json.load(f)
+        except Exception:
+            return
+
+        tracks = data.get("tracks", [])
+        cart   = data.get("cart_tracks", [])
+
+        self.track_panel.playlist.clear()
+        for fp in tracks:
+            if os.path.exists(fp):
+                self.track_panel._add_item_to(self.track_panel.playlist, fp)
+        self.track_panel._update_count(self.track_panel.playlist,
+                                       self.track_panel.count_label)
+
+        self.cart_panel.playlist.clear()
+        for fp in cart:
+            if os.path.exists(fp):
+                self.cart_panel._add_item_to(self.cart_panel.playlist, fp)
+        self.cart_panel._update_count(self.cart_panel.playlist,
+                                      self.cart_panel.count_label)