1 files changed, 85 insertions, 0 deletions
diff --git a/tidal_dl_ng/gui/history.py b/tidal_dl_ng/gui/history.py
new file mode 100644
index 0000000..28b8f8d
--- /dev/null
+++ b/tidal_dl_ng/gui/history.py
@@ -0,0 +1,85 @@
+"""History management mixin for MainWindow.
+
+Handles download history and duplicate prevention.
+"""
+
+from PySide6 import QtCore
+from tidalapi import Track
+
+from tidal_dl_ng.dialog import DialogPreferences
+from tidal_dl_ng.dialog_history import DialogHistory
+from tidal_dl_ng.logger import logger_gui
+from tidal_dl_ng.model.gui_data import StatusbarMessage
+
+
+class HistoryMixin:
+    """Mixin containing download history management methods."""
+
+    def on_view_history(self) -> None:
+        """Open the download history dialog."""
+        DialogHistory(history_service=self.history_service, parent=self)
+
+    def on_toggle_duplicate_prevention(self, enabled: bool) -> None:
+        """Toggle duplicate download prevention on or off."""
+        self.history_service.update_settings(preventDuplicates=enabled)
+        status_msg = "enabled" if enabled else "disabled"
+        logger_gui.info(f"Duplicate download prevention {status_msg}")
+        self.s_statusbar_message.emit(StatusbarMessage(message=f"Duplicate prevention {status_msg}.", timeout=2500))
+
+    def on_mark_track_as_downloaded(self, track: Track, index: QtCore.QModelIndex) -> None:
+        """Mark a track as downloaded in history."""
+        track_id = str(track.id)
+
+        source_type = "manual"
+        source_id = None
+        source_name = None
+
+        if hasattr(track, "album") and track.album:
+            source_type = "album"
+            source_id = str(track.album.id)
+            source_name = track.album.name
+
+        self.history_service.add_track_to_history(
+            track_id=track_id, source_type=source_type, source_id=source_id, source_name=source_name
+        )
+
+        self._update_downloaded_column(index, True)
+        logger_gui.info(f"Marked track as downloaded: {track.name}")
+
+    def on_mark_track_as_not_downloaded(self, track_id: str, index: QtCore.QModelIndex) -> None:
+        """Remove a track from download history."""
+        success = self.history_service.remove_track_from_history(track_id)
+
+        if success:
+            self._update_downloaded_column(index, False)
+            logger_gui.info(f"Unmarked track (ID: {track_id})")
+
+    def _update_downloaded_column(self, index: QtCore.QModelIndex, is_downloaded: bool) -> None:
+        """Update the Downloaded? column for a specific index."""
+        source_index = self.proxy_tr_results.mapToSource(index)
+
+        item = self.model_tr_results.itemFromIndex(source_index)
+        if not item:
+            return
+
+        row = item.row()
+        parent = item.parent()
+
+        downloaded_item = self.model_tr_results.item(row, 8) if parent is None else parent.child(row, 8)
+
+        if downloaded_item:
+            if is_downloaded:
+                downloaded_item.setText("✅")
+                downloaded_item.setTextAlignment(QtCore.Qt.AlignmentFlag.AlignCenter)
+            else:
+                downloaded_item.setText("")
+
+    def on_preferences(self) -> None:
+        """Open the preferences dialog."""
+        DialogPreferences(settings=self.settings, settings_save=self.s_settings_save, parent=self)
+
+    def on_settings_save(self) -> None:
+        """Save settings and re-apply them to the GUI."""
+        self.settings.save()
+        self.apply_settings(self.settings)
+        self._init_dl()