emmental/db/disc.py

78 lines
2.6 KiB
Python

# Copyright 2021 (c) Anna Schumaker.
#
# Table: discs
# +--------+---------+--------+----------+
# | discid | albumid | number | subtitle |
# +--------+---------+--------+----------+
from gi.repository import GObject
from . import album
from . import execute
from . import objects
from . import state
class Disc(objects.Row):
def __gt__(self, rhs): return self.number > rhs.number
def __lt__(self, rhs): return self.number < rhs.number
def __str__(self):
if self.subtitle:
return f"{str(self.album)}: {self.subtitle}"
return f"{str(self.album)}"
def do_get_column(self, column):
return execute(f"SELECT {column} FROM discs "
"WHERE discid=?", [ self.rowid ])
@GObject.Property
def album(self):
return album.Album(self.get_column("albumid"))
@GObject.Property
def number(self):
return self.get_column("number")
@GObject.Property
def playlist_state(self):
return state.PlaylistState(self.get_column("plstateid"))
@GObject.Property
def subtitle(self):
return self.get_column("subtitle")
class DiscTable(objects.Table):
def __init__(self):
objects.Table.__init__(self, "discs", Disc)
def do_create(self):
execute("CREATE TABLE IF NOT EXISTS discs "
"(discid INTEGER PRIMARY KEY, "
" albumid INTEGER, "
" plstateid INTEGER NOT NULL, "
" number INTEGER, "
" subtitle TEXT, "
" FOREIGN KEY(albumid) REFERENCES albums(albumid), "
" FOREIGN KEY(plstateid) REFERENCES playlist_states(plstateid), "
" UNIQUE(albumid, number))")
def do_insert(self, album, number, subtitle):
subtitle = subtitle if subtitle and len(subtitle) > 0 else None
plstate = state.Table.insert(random=False, loop=False)
return execute("INSERT INTO discs (albumid, plstateid, number, subtitle) "
"VALUES (?, ?, ?, ?)",
[ int(album), int(plstate), number, subtitle ])
def do_delete(self, disc):
state.Table.delete(disc.playlist_state)
return execute("DELETE FROM discs WHERE discid=?", [ int(disc) ])
def do_get(self, rowid):
return execute("SELECT discid FROM discs "
"WHERE discid=?", [ rowid ])
def do_lookup(self, album, number, subtitle=None):
return execute("SELECT discid FROM discs "
"WHERE (albumid=? AND number=?)", [ int(album), number ])
Table = DiscTable()