97 lines
3.1 KiB
Python
97 lines
3.1 KiB
Python
# Copyright 2021 (c) Anna Schumaker.
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#
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# Table: genres
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# +---------+-----------+------+------+
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# | genreid | plstateid | name | sort |
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# +---------+-----------+------+------+
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#
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# Index: genre_index
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# +-----------------+
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# | name -> genreid |
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# +-----------------+
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#
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# Map: genre_map
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# +---------+---------+
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# | genreid | trackid |
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# +---------+---------+
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from gi.repository import GObject
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from . import objects
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from . import playlist
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from . import track
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from . import sql
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class Genre(playlist.Playlist):
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def __init__(self, row):
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playlist.Playlist.__init__(self, row, "emblem-generic")
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self._name = row["name"]
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def delete(self): Table.delete(self)
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@GObject.Property
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def name(self): return self._name
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class GenreTable(playlist.Model):
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def __init__(self):
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playlist.Model.__init__(self, "genres", "sort")
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def do_create(self):
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sql.execute("CREATE TABLE IF NOT EXISTS genres "
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"(genreid INTEGER PRIMARY KEY, "
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" plstateid INTEGER NOT NULL, "
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" name TEXT UNIQUE, "
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" sort TEXT, "
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" FOREIGN KEY(plstateid) REFERENCES playlist_states(plstateid))")
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sql.execute("CREATE INDEX IF NOT EXISTS genre_index "
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"ON genres(name)")
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def do_factory(self, row):
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return Genre(row)
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def do_insert(self, plstate, name):
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return sql.execute("INSERT INTO genres (plstateid, name, sort) "
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"VALUES (?, ?, ?)",
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[ plstate.rowid, name, name.casefold() ])
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def do_lookup(self, name):
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return sql.execute("SELECT * FROM genres WHERE name=?", [ name ])
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class GenreMap(objects.Map):
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def __init__(self):
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objects.Map.__init__(self, "genre_map", Table.get, track.Table.get)
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self.lookup_tracks = self.lookup_rhs
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self.lookup_genres = self.lookup_lhs
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def do_create(self):
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sql.execute("CREATE TABLE IF NOT EXISTS genre_map "
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"(genreid INTEGER, "
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" trackid INTEGER, "
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" FOREIGN KEY(genreid) REFERENCES genres(genreid), "
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" FOREIGN KEY(trackid) REFERENCES tracks(trackid), "
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" UNIQUE(genreid, trackid))")
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def do_insert(self, genre, track):
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sql.execute("INSERT INTO genre_map (genreid, trackid) "
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"VALUES (?, ?)", [ genre.rowid, track.rowid ])
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def do_delete(self, genre, track):
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return sql.execute("DELETE FROM genre_map WHERE genreid=? AND trackid=?",
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[ genre.rowid, track.rowid ])
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def do_lookup_rhs(self, genre):
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return sql.execute("SELECT trackid FROM genre_map "
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"WHERE genreid=?", [ genre.rowid ])
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def do_lookup_lhs(self, track):
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return sql.execute("SELECT genreid FROM genre_map "
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"WHERE trackid=?", [ track.rowid ])
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def delete_track(self, track):
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for genre in self.lookup_genres(track):
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self.delete(genre, track)
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Table = GenreTable()
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Map = GenreMap()
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