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from common import utils
from models.base import BaseModel
class Album(BaseModel):
"""Represents an album."""
def __init__(self, db, id=None, **kwargs):
self._db = db
if id is not None:
for row in self._db.execute("SELECT * FROM album WHERE id = ?",
(id, )):
setattr(self, "id", id)
setattr(self, "name", row[1])
setattr(self, "date", row[2])
else:
for (key, value) in kwargs.items():
setattr(self, key, value)
def delete(self):
for track in self.tracks:
track.delete()
with self._db.conn:
delete_album = "DELETE FROM album WHERE id = ?"
self._db.execute(delete_album, (self.id, ))
delete_track_rel = "DELETE FROM album_track WHERE album_id = ?"
self._db.execute(delete_track_rel, (self.id, ))
delete_artist_rel = "DELETE FROM album_artist WHERE album_id = ?"
self._db.execute(delete_artist_rel, (self.id, ))
return True
@property
def db(self):
return self._db
@db.setter
def db(self, db):
self._db = db
@property
def artists(self):
from models.artist import Artist
if not hasattr(self, "_artists"):
setattr(self, "_artists", [])
for row in self._db.execute(
"SELECT artist.* FROM artist INNER "
"JOIN album_artist ON artist.id = "
"album_artist.artist_id WHERE "
"album_id = ? ORDER BY name ASC", (self.id, )):
artist = Artist(id=row[0],
db=self._db,
name=row[1],
sortname=row[2],
musicbrainz_artistid=row[3])
self._artists.append(artist)
return self._artists
@property
def tracks(self):
from models.track import Track
if not hasattr(self, "_tracks"):
setattr(self, "_tracks", [])
for row in self._db.execute(
"SELECT track.* FROM track INNER "
"JOIN album_track ON track.id = "
"album_track.track_id WHERE "
"album_id = ? ORDER BY tracknumber "
"ASC", (self.id, )):
track = Track(id=row["id"],
db=self._db,
tracknumber=row["tracknumber"],
name=row["name"],
grouping=row["grouping"],
filename=row["filename"])
self._tracks.append(track)
return self._tracks
def save(self):
dirty_attributes = {}
# check if the internal dict has been modified
for (attr, value) in self.__dict__.items():
if self.__data[attr] != getattr(self, attr):
dirty_attributes[attr] = value
if len(dirty_attributes) > 0:
set_clause = utils.update_clause_from_dict(dirty_attributes)
dirty_attributes["id"] = self.id
sql = " ".join(("UPDATE album", set_clause, "WHERE id = :id"))
with self._db.conn:
self._db.execute(sql, dirty_attributes)
@classmethod
def search(cls, database, **search_params):
"""Find an album with the given params
Args:
name: dict, with 'data' and 'operator' keys
date: dict, with 'data' and 'operator' keys
musicbrainz_albumid: dict, with 'data' and 'operator' keys
"""
albums = []
# unpack search params
where_params = {}
value_params = {}
for (attr, value) in search_params.items():
where_params[attr] = value["operator"]
if value["operator"] == "BETWEEN":
items = value["data"].split(" ")
value_params["".join((attr, "1"))] = items[0]
value_params["".join((attr, "2"))] = items[2]
else:
value_params[attr] = value["data"]
where_clause = utils.make_where_clause(where_params)
result = None
if where_clause:
statement = " ".join(("SELECT * FROM album", where_clause))
result = database.execute(statement, value_params)
else:
result = database.execute("SELECT * FROM album")
for row in result:
albums.append(
Album(id=row["id"],
db=database,
name=row["name"],
date=row["date"]))
return albums
@classmethod
def all(cls,
database,
order="album.id",
direction="ASC",
limit=None,
offset=None):
albums = []
select_string = """SELECT * FROM album LEFT JOIN album_artist ON
album_artist.album_id = album.id LEFT JOIN artist ON
album_artist.artist_id = artist.id ORDER BY %s %s""" % (order,
direction)
if limit is not None and offset is not None:
select_string = " ".join(
(select_string, "LIMIT %s OFFSET %s" % (limit, offset)))
result = database.execute(select_string)
for row in result:
albums.append(
Album(id=row["id"],
db=database,
name=row["name"],
date=row["date"]))
return albums
|
