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linedance-app/ui/library_panel.py

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+"""
+library_panel.py — Musikbibliotek med søgning og drag-and-drop til danseliste.
+"""
+
+from PyQt6.QtWidgets import (
+    QWidget, QVBoxLayout, QListWidget, QListWidgetItem,
+    QLineEdit, QLabel, QHBoxLayout, QPushButton, QProgressBar,
+    QAbstractItemView,
+)
+from PyQt6.QtCore import Qt, pyqtSignal, QTimer, QMimeData, QByteArray
+from PyQt6.QtGui import QColor, QDrag
+
+
+class DraggableLibraryList(QListWidget):
+    """QListWidget der understøtter drag-start med sang-data som mime."""
+
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self.setDragEnabled(True)
+        self.setDragDropMode(QAbstractItemView.DragDropMode.DragOnly)
+        self.setDefaultDropAction(Qt.DropAction.CopyAction)
+
+    def startDrag(self, supported_actions):
+        item = self.currentItem()
+        if not item:
+            return
+        song = item.data(Qt.ItemDataRole.UserRole)
+        if not song:
+            return
+
+        import json
+        data = json.dumps(song).encode("utf-8")
+
+        mime = QMimeData()
+        mime.setData("application/x-linedance-song", QByteArray(data))
+        mime.setText(song.get("title", ""))
+
+        drag = QDrag(self)
+        drag.setMimeData(mime)
+        drag.exec(Qt.DropAction.CopyAction)
+
+
+class LibraryPanel(QWidget):
+    song_selected       = pyqtSignal(dict)
+    add_to_playlist     = pyqtSignal(dict)
+    scan_requested      = pyqtSignal()
+    edit_tags_requested = pyqtSignal(dict)
+    send_mail_requested = pyqtSignal(dict)
+
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self._all_songs: list[dict] = []
+        self._filtered:  list[dict] = []
+        self._bpm_scan_running = False
+        self._search_timer = QTimer(self)
+        self._search_timer.setSingleShot(True)
+        self._search_timer.setInterval(150)
+        self._search_timer.timeout.connect(self._do_search)
+        self._build_ui()
+
+    def _build_ui(self):
+        layout = QVBoxLayout(self)
+        layout.setContentsMargins(0, 0, 0, 0)
+        layout.setSpacing(0)
+
+        # Header
+        header = QHBoxLayout()
+        header.setContentsMargins(10, 6, 10, 6)
+        lbl = QLabel("BIBLIOTEK")
+        lbl.setObjectName("section_title")
+        header.addWidget(lbl)
+        header.addStretch()
+
+        self._btn_bpm_scan = QPushButton("♩  BPM alle")
+        self._btn_bpm_scan.setFixedHeight(24)
+        self._btn_bpm_scan.setToolTip("Analysér BPM på alle sange uden BPM (kører i baggrunden)")
+        self._btn_bpm_scan.clicked.connect(self._start_bulk_bpm_scan)
+        header.addWidget(self._btn_bpm_scan)
+
+        btn_manage = QPushButton("⚙  Mapper")
+        btn_manage.setFixedHeight(24)
+        btn_manage.setToolTip("Tilføj, fjern og scan musikbiblioteker")
+        btn_manage.clicked.connect(self._manage_libraries)
+        header.addWidget(btn_manage)
+        layout.addLayout(header)
+
+        # Scan status
+        self._scan_bar = QProgressBar()
+        self._scan_bar.setObjectName("scan_bar")
+        self._scan_bar.setTextVisible(True)
+        self._scan_bar.setFormat("Scanner...")
+        self._scan_bar.setFixedHeight(16)
+        self._scan_bar.setRange(0, 0)
+        self._scan_bar.hide()
+        layout.addWidget(self._scan_bar)
+
+        self._scan_label = QLabel("")
+        self._scan_label.setObjectName("result_count")
+        self._scan_label.hide()
+        layout.addWidget(self._scan_label)
+
+        # Søgefelt
+        self._search = QLineEdit()
+        self._search.setPlaceholderText("Søg i titel, artist, album, dans...")
+        self._search.textChanged.connect(self._on_search_changed)
+        layout.addWidget(self._search)
+
+        # Resultat-tæller + drag-hint
+        hint_row = QHBoxLayout()
+        hint_row.setContentsMargins(8, 2, 8, 2)
+        self._count_label = QLabel("0 sange")
+        self._count_label.setObjectName("result_count")
+        hint_row.addWidget(self._count_label)
+        hint_row.addStretch()
+        drag_hint = QLabel("træk til danseliste →")
+        drag_hint.setObjectName("result_count")
+        hint_row.addWidget(drag_hint)
+        layout.addLayout(hint_row)
+
+        # Liste — draggable
+        self._list = DraggableLibraryList()
+        self._list.setObjectName("library_list")
+        self._list.itemDoubleClicked.connect(self._on_double_click)
+        self._list.setContextMenuPolicy(Qt.ContextMenuPolicy.CustomContextMenu)
+        self._list.customContextMenuRequested.connect(self._show_context_menu)
+        layout.addWidget(self._list)
+
+    # ── Scanning ──────────────────────────────────────────────────────────────
+
+    def _on_scan_clicked(self):
+        self.scan_requested.emit()
+
+    def set_scanning(self, scanning: bool, status_text: str = ""):
+        if scanning:
+            self._scan_bar.show()
+            self._scan_label.setText(status_text or "Starter...")
+            self._scan_label.show()
+        else:
+            self._scan_bar.hide()
+            self._scan_label.hide()
+
+    def update_scan_status(self, text: str):
+        self._scan_label.setText(text)
+
+    # ── Sange ─────────────────────────────────────────────────────────────────
+
+    def load_songs(self, songs: list[dict]):
+        self._all_songs = songs
+        self._do_search()
+
+    # ── Søgning ───────────────────────────────────────────────────────────────
+
+    def _on_search_changed(self):
+        self._search_timer.start()
+
+    def _do_search(self):
+        q = self._search.text().strip().lower()
+        self._filtered = [s for s in self._all_songs if self._matches(s, q)] if q else list(self._all_songs)
+        total = len(self._all_songs)
+        found = len(self._filtered)
+        q_text = self._search.text().strip()
+        self._count_label.setText(
+            f"{found} resultat{'er' if found != 1 else ''} for \"{q_text}\"" if q_text
+            else f"{total} sang{'e' if total != 1 else ''}"
+        )
+        self._render()
+
+    def _matches(self, song: dict, q: str) -> bool:
+        return any(q in f.lower() for f in [
+            song.get("title", ""), song.get("artist", ""),
+            song.get("album", ""), song.get("file_format", ""),
+        ] + song.get("dances", []))
+
+    def _render(self):
+        self._list.clear()
+        q = self._search.text().strip().lower()
+        for song in self._filtered:
+            dances = song.get("dances", [])
+            dance_levels = song.get("dance_levels", [])
+            missing = song.get("file_missing", False)
+
+            dance_parts = []
+            for i, d in enumerate(dances):
+                lvl = dance_levels[i] if i < len(dance_levels) else ""
+                dance_parts.append(f"{d} / {lvl}" if lvl else d)
+            dance_str = "  ·  " + "  |  ".join(dance_parts) if dance_parts else ""
+
+            line1 = ("⚠  " if missing else "") + song.get("title", "—")
+            bpm = song.get("bpm", 0)
+            bpm_str = f"{bpm} BPM" if bpm else "? BPM"
+            line2 = f"  {song.get('artist','—')}  ·  {bpm_str}  ·  {song.get('file_format','').upper()}{dance_str}"
+
+            row_widget = QWidget()
+            row_widget.setStyleSheet("background: transparent;")
+            row_layout = QHBoxLayout(row_widget)
+            row_layout.setContentsMargins(2, 2, 2, 2)
+            row_layout.setSpacing(8)
+
+            lbl = QLabel(f"{line1}\n{line2}")
+            lbl.setWordWrap(False)
+            row_layout.addWidget(lbl, stretch=1)
+
+            btn_danse = QPushButton("Danse")
+            btn_danse.setFixedHeight(30)
+            btn_danse.setFixedWidth(70)
+            btn_danse.setToolTip("Rediger dans-tags")
+            btn_danse.setStyleSheet(
+                "QPushButton { background: #e8a020; color: #111; border-radius: 4px; "
+                "font-weight: bold; font-size: 12px; border: none; }"
+                "QPushButton:hover { background: #f0b030; }"
+            )
+            btn_danse.clicked.connect(lambda _, s=song: self.edit_tags_requested.emit(s))
+            row_layout.addWidget(btn_danse)
+
+            item = QListWidgetItem()
+            item.setData(Qt.ItemDataRole.UserRole, song)
+            row_widget.adjustSize()
+            hint = row_widget.sizeHint()
+            hint.setHeight(max(hint.height(), 52))
+            item.setSizeHint(hint)
+            self._list.addItem(item)
+            self._list.setItemWidget(item, row_widget)
+
+    def _start_bulk_bpm_scan(self):
+        """Start BPM-analyse på alle sange uden BPM i baggrundstråd med lav prioritet."""
+        if self._bpm_scan_running:
+            return
+        songs_without_bpm = [s for s in self._all_songs
+                             if not s.get("bpm") and not s.get("file_missing")]
+        if not songs_without_bpm:
+            self._btn_bpm_scan.setText("♩  Alle har BPM")
+            return
+
+        self._bpm_scan_running = True
+        self._btn_bpm_scan.setText(f"♩  Scanner 0/{len(songs_without_bpm)}...")
+        self._btn_bpm_scan.setEnabled(False)
+
+        from PyQt6.QtCore import QThread, pyqtSignal as _sig
+
+        class BulkBpmWorker(QThread):
+            progress = _sig(int, int, str)  # done, total, title
+            finished = _sig()
+
+            def __init__(self, songs):
+                super().__init__()
+                self._songs = songs
+
+            def run(self):
+                from local.tag_reader import analyze_and_save_bpm
+                total = len(self._songs)
+                for i, song in enumerate(self._songs, start=1):
+                    if self.isInterruptionRequested():
+                        break
+                    try:
+                        bpm = analyze_and_save_bpm(song["local_path"], song["id"])
+                        if bpm:
+                            song["bpm"] = int(round(bpm))
+                    except Exception:
+                        pass
+                    self.progress.emit(i, total, song.get("title", ""))
+                self.finished.emit()
+
+        self._bulk_bpm_worker = BulkBpmWorker(songs_without_bpm)
+
+        def on_progress(done, total, title):
+            self._btn_bpm_scan.setText(f"♩  {done}/{total}...")
+            # Opdater sangen i listen
+            for s in self._all_songs:
+                if s.get("title") == title and s.get("bpm"):
+                    break
+            self._do_search()
+
+        def on_finished():
+            self._bpm_scan_running = False
+            self._btn_bpm_scan.setEnabled(True)
+            self._btn_bpm_scan.setText("♩  BPM alle")
+            self._do_search()
+
+        self._bulk_bpm_worker.progress.connect(on_progress)
+        self._bulk_bpm_worker.finished.connect(on_finished)
+        self._bulk_bpm_worker.start()
+        self._bulk_bpm_worker.setPriority(QThread.Priority.LowestPriority)
+
+    # ── Handlinger ────────────────────────────────────────────────────────────
+
+    def _on_double_click(self, item: QListWidgetItem):
+        song = item.data(Qt.ItemDataRole.UserRole)
+        if song:
+            self.song_selected.emit(song)
+
+    def _show_context_menu(self, pos):
+        from PyQt6.QtWidgets import QMenu
+        item = self._list.itemAt(pos)
+        if not item:
+            return
+        song = item.data(Qt.ItemDataRole.UserRole)
+        if not song:
+            return
+        menu = QMenu(self)
+        act_add    = menu.addAction("Tilføj til danseliste")
+        act_play   = menu.addAction("Afspil")
+        menu.addSeparator()
+        act_tags   = menu.addAction("✎  Rediger dans-tags...")
+        act_bpm    = menu.addAction("♩  Analysér BPM")
+        menu.addSeparator()
+        send_menu  = menu.addMenu("Send til")
+        act_mail   = send_menu.addAction("✉  Send som mail")
+        action = menu.exec(self._list.mapToGlobal(pos))
+        if action == act_add:
+            self.add_to_playlist.emit(song)
+        elif action == act_play:
+            self.song_selected.emit(song)
+        elif action == act_tags:
+            self.edit_tags_requested.emit(song)
+        elif action == act_bpm:
+            self._analyze_bpm(song)
+        elif action == act_mail:
+            self.send_mail_requested.emit(song)
+
+    def _analyze_bpm(self, song: dict):
+        """Analysér BPM i baggrundstråd og opdater biblioteket."""
+        path = song.get("local_path", "")
+        song_id = song.get("id", "")
+        if not path or not song_id:
+            return
+        from PyQt6.QtCore import QThread, pyqtSignal as _sig
+
+        class BpmWorker(QThread):
+            done = _sig(float)
+            def __init__(self, p, sid):
+                super().__init__()
+                self._p, self._sid = p, sid
+            def run(self):
+                from local.tag_reader import analyze_and_save_bpm
+                bpm = analyze_and_save_bpm(self._p, self._sid)
+                if bpm:
+                    self.done.emit(bpm)
+
+        self._bpm_worker = BpmWorker(path, song_id)
+
+        def on_bpm_done(bpm):
+            # Opdater sangen i _all_songs listen direkte
+            for s in self._all_songs:
+                if s.get("id") == song_id:
+                    s["bpm"] = int(round(bpm))
+                    break
+            self._do_search()
+
+        self._bpm_worker.done.connect(on_bpm_done)
+        self._bpm_worker.start()
+
+    def _manage_libraries(self):
+        from ui.library_manager import LibraryManagerDialog
+        dialog = LibraryManagerDialog(parent=self.window())
+        dialog.library_removed.connect(lambda _: self.scan_requested.emit())
+        dialog.exec()
+
+    def _add_folder(self):
+        from PyQt6.QtWidgets import QFileDialog
+        folder = QFileDialog.getExistingDirectory(self, "Vælg musikmappe")
+        if folder:
+            mw = self.window()
+            if hasattr(mw, "add_library_path"):
+                mw.add_library_path(folder)