From 07518d34d676df41bf2259cf66ba92444673c810 Mon Sep 17 00:00:00 2001
From: Jon Bergli Heier <snakebite@jvnv.net>
Date: Thu, 18 Aug 2011 20:59:16 +0200
Subject: Basic database support.

---
 db.py | 125 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 125 insertions(+)
 create mode 100644 db.py

(limited to 'db.py')

diff --git a/db.py b/db.py
new file mode 100644
index 0000000..4819159
--- /dev/null
+++ b/db.py
@@ -0,0 +1,125 @@
+from config import config
+from sqlalchemy import create_engine
+engine = create_engine(config.get('db_path'))
+
+from sqlalchemy.ext.declarative import declarative_base
+Base = declarative_base()
+
+from sqlalchemy import Column, Integer, String, ForeignKey
+from sqlalchemy.orm import relationship, backref
+from sqlalchemy import and_
+
+from sqlalchemy.orm.exc import NoResultFound
+
+class Directory(Base):
+	__tablename__ = 'directories'
+
+	id = Column(Integer, primary_key = True)
+	path = Column(String, nullable = False, index = True)
+	parent_id = Column(Integer, ForeignKey('directories.id'))
+
+	parent = relationship('Directory')
+
+	def __init__(self, path):
+		self.path = path
+
+	def __repr__(self):
+		return '<Directory("{0}")>'.format(self.path)
+
+	@staticmethod
+	def get(session, path):
+		try:
+			directory = session.query(Directory).filter(Directory.path == path).one()
+		except NoResultFound:
+			directory = Directory(path)
+			session.add(directory)
+			session.commit()
+		return directory
+
+class Artist(Base):
+	__tablename__ = 'artists'
+
+	id = Column(Integer, primary_key = True)
+	name = Column(String, nullable = False, index = True)
+
+	def __init__(self, name):
+		self.name = name
+
+	def __repr__(self):
+		return '<Artist("{0}")>'.format(self.name.encode('utf-8'))
+
+	@staticmethod
+	def get(session, name):
+		try:
+			artist = session.query(Artist).filter(Artist.name == name).one()
+		except NoResultFound:
+			artist = Artist(name)
+			session.add(artist)
+			session.commit()
+		return artist
+
+class Album(Base):
+	__tablename__ = 'albums'
+
+	id = Column(Integer, primary_key = True)
+	name = Column(String, nullable = False, index = True)
+	artist_id = Column(Integer, ForeignKey('artists.id'), nullable = False)
+
+	artist = relationship(Artist, backref = backref('albums', order_by = name))
+
+	def __init__(self, name, artist_id):
+		self.name = name
+		self.artist_id = artist_id
+
+	def __repr__(self):
+		return '<Album("{0}")>'.format(self.name)
+
+	@staticmethod
+	def get(session, name, artist_id = None):
+		try:
+			album = session.query(Album).filter(Album.name == name).one()
+		except NoResultFound:
+			album = Album(name, artist_id)
+			session.add(album)
+			session.commit()
+		return album
+
+class Track(Base):
+	__tablename__ = 'tracks'
+
+	id = Column(Integer, primary_key = True)
+	name = Column(String, index = True)
+	num = Column(Integer)
+	filename = Column(String, nullable = False, index = True)
+	file_index = Column(Integer)
+	directory_id = Column(Integer, ForeignKey('directories.id'), nullable = False)
+	artist_id = Column(Integer, ForeignKey('artists.id'))
+	album_id = Column(Integer, ForeignKey('albums.id'))
+
+	directory = relationship(Directory, backref = backref('tracks', order_by = filename))
+
+	def __init__(self, name, num, filename, file_index, directory_id, artist_id, album_id):
+		self.name = name
+		self.num = num
+		self.filename = filename
+		self.file_index = file_index
+		self.directory_id = directory_id
+		self.artist_id = artist_id
+		self.album_id = album_id
+
+	def __repr__(self):
+		return u'<Track("{0}")>'.format(self.name)
+
+	@staticmethod
+	def get(session, name, num, filename, file_index, directory_id, artist_id, album_id):
+		try:
+			track = session.query(Track).filter(and_(Track.filename == filename, Track.file_index == file_index)).one()
+		except NoResultFound:
+			track = Track(name, num, filename, file_index, directory_id, artist_id, album_id)
+			session.add(track)
+		return track
+
+Base.metadata.create_all(engine)
+
+from sqlalchemy.orm import sessionmaker
+Session = sessionmaker(bind = engine)
-- 
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