Play next works

app/model.py

@@ -13,6 +13,9 @@ from sqlalchemy.orm import sessionmaker
 
 from config import Config
 
+from log import ERROR, DEBUG
+# from log import INFO, ERROR, DEBUG
+
 # "Constants"
 # Instantiate logging
 pytiger.logging.config.basic_config(stderr=False, level=logging.INFO)
@@ -88,6 +91,7 @@ class Tracks(Base):
 
     @classmethod
     def get_or_create(cls, path):
+        DEBUG(f"get_or_create(cls, {path})")
         try:
             track = session.query(cls).filter(cls.path == path).one()
         except NoResultFound:
@@ -105,6 +109,16 @@ class Tracks(Base):
             print(f"Can't find track id {id}")
             return None
 
+    @staticmethod
+    def get_track(id):
+        try:
+            DEBUG(f"get_track({id})")
+            track = session.query(Tracks).filter(Tracks.id == id).one()
+            return track
+        except NoResultFound:
+            ERROR(f"get_track({id}): not found")
+            return None
+
     @staticmethod
     def search_titles(text):
         return (

app/musicmuster.py

@@ -1,10 +1,10 @@
 #!/usr/bin/python3
 
+import os
 import vlc
 import sys
 
-from log import DEBUG
-# from log import INFO, ERROR, DEBUG
+from log import DEBUG, ERROR
 
 from PyQt5.QtCore import Qt
 from PyQt5.QtWidgets import QApplication, QDialog, QMainWindow
@@ -44,11 +44,88 @@ class RepeatedTimer:
         self.is_running = False
 
 
+class Music:
+    def __init__(self):
+        self.current_track = {
+            "player": None,
+            "meta": None
+        }
+
+        self.next_track = {
+            "player": None,
+            "meta": None
+        }
+
+        self.previous_track = {
+            "player": None,
+            "meta": None
+        }
+
+    def get_current_artist(self):
+        return self.current_track['meta'].artist
+
+    def get_current_duration(self):
+        return self.current_track['meta'].duration
+
+    def get_current_fade_at(self):
+        return self.current_track['meta'].fade_at
+
+    def get_current_playtime(self):
+        return self.current_track['player'].get_time()
+
+    def get_current_silence_at(self):
+        return self.current_track['meta'].silence_at
+
+    def get_current_title(self):
+        return self.current_track['meta'].title
+
+    def get_last_artist(self):
+        return self.last_track['meta'].artist
+
+    def get_last_title(self):
+        return self.last_track['meta'].title
+
+    def get_next_artist(self):
+        return self.next_track['meta'].artist
+
+    def get_next_title(self):
+        return self.next_track['meta'].title
+
+    def play_next(self):
+        if self.previous_track['player']:
+            self.previous_track['player'].release()
+        if self.current_track['player']:
+            self.current_track['player'].stop()
+            self.previous_track = self.current_track
+        self.current_track = self.next_track
+        self.next_track = {
+            "player": None,
+            "meta": None
+        }
+
+        self.current_track['player'].play()
+
+    def resume_last(self):
+        pass
+
+    def set_next_track(self, id):
+        track = Tracks.get_track(id)
+        if not track:
+            ERROR(f"set_next_track({id}): can't find track")
+            return None
+
+        self.next_track['player'] = vlc.MediaPlayer(
+            os.path.join(Config.ROOT, track.path))
+        self.next_track['meta'] = track
+        return track.id
+
+
 class Window(QMainWindow, Ui_MainWindow):
     def __init__(self, parent=None):
         super().__init__(parent)
         self.setupUi(self)
         self.connectSignalsSlots()
+        self.music = Music()
 
         record = Settings.get_int("mainwindow_x")
         x = record.f_int or 1
@@ -92,12 +169,17 @@ class Window(QMainWindow, Ui_MainWindow):
     def connectSignalsSlots(self):
         self.fileButton.clicked.connect(self.selectFile)
         self.databaseButton.clicked.connect(self.selectFromDatabase)
-        self.actionPlay_selected.triggered.connect(self.play_selected)
+        self.actionPlay_selected.triggered.connect(self.play_next)
+        self.actionPlay_next.triggered.connect(self.play_next)
+        self.playlist.itemSelectionChanged.connect(self.set_next)
 
     def selectFromDatabase(self):
         dlg = DbDialog(self)
         dlg.exec()
 
+    def play_next(self):
+        self.music.play_next()
+
     def play_selected(self):
         if self.playlist.selectionModel().hasSelection():
             row = self.playlist.currentRow()
@@ -124,6 +206,14 @@ class Window(QMainWindow, Ui_MainWindow):
             #     track = Track(fname)
             #     self.add_to_playlist(track)
 
+    def set_next(self):
+        if self.playlist.selectionModel().hasSelection():
+            row = self.playlist.currentRow()
+            track_id = int(self.playlist.item(row, 0).text())
+            DEBUG(f"set_next: track_id={track_id}")
+            if self.music.set_next_track(track_id) != track_id:
+                ERROR("Can't set next track")
+
     def add_to_playlist(self, track):
         """
         Add track to playlist

app/ui/main_window.ui

@@ -322,6 +322,7 @@ border: 1px solid rgb(85, 87, 83);</string>
      <string>Pla&amp;ylist</string>
     </property>
     <addaction name="actionPlay_selected"/>
+    <addaction name="actionPlay_next"/>
    </widget>
    <addaction name="menuFile"/>
    <addaction name="menuPlaylist"/>
@@ -333,12 +334,17 @@ border: 1px solid rgb(85, 87, 83);</string>
   </widget>
   <action name="actionPlay_selected">
    <property name="text">
-    <string>Play selected</string>
+    <string>&amp;Play selected</string>
    </property>
    <property name="shortcut">
     <string>Return</string>
    </property>
   </action>
+  <action name="actionPlay_next">
+   <property name="text">
+    <string>Play &amp;next</string>
+   </property>
+  </action>
  </widget>
  <resources/>
  <connections/>