#! /usr/bin/env python
from __future__ import print_function
import os
from sqlobject import SQLObject, StringCol, UnicodeCol, IntCol, BoolCol, \
ForeignKey, DateCol, DatabaseIndex, RelatedJoin, \
connectionForURI, sqlhub, SQLObjectNotFound, dberrors
from .compat import string_type
from .config import get_config
__all__ = ['Author', 'Book', 'Extension', 'Genre', 'Language',
'AuthorBook', 'BookGenre', 'open_db', 'init_db',
'insert_name', 'insert_author', 'update_counters',
]
[документация]class Author(SQLObject):
surname = UnicodeCol(notNull=True)
name = UnicodeCol(notNull=True)
misc_name = UnicodeCol(notNull=True)
count = IntCol(notNull=True)
books = RelatedJoin('Book', otherColumn='book_id',
intermediateTable='author_book',
createRelatedTable=False)
@property
def fullname(self):
fullnames = filter(None, (self.surname, self.name, self.misc_name))
return ' '.join(fullnames)
full_name_idx = DatabaseIndex(surname, name, misc_name, unique=True)
count_idx = DatabaseIndex(count)
[документация]class AuthorBook(SQLObject):
class sqlmeta:
table = "author_book"
author = ForeignKey('Author', notNull=True, cascade=True)
book = ForeignKey('Book', notNull=True, cascade=True)
author_idx = DatabaseIndex(author)
book_idx = DatabaseIndex(book)
main_idx = DatabaseIndex(author, book, unique=True)
[документация]class Book(SQLObject):
authors = RelatedJoin('Author',
intermediateTable='author_book',
createRelatedTable=False)
genres = RelatedJoin('Genre',
intermediateTable='book_genre',
createRelatedTable=False)
title = UnicodeCol(notNull=True)
series = UnicodeCol(notNull=True)
ser_no = IntCol()
archive = StringCol(notNull=True)
file = UnicodeCol(notNull=True)
size = IntCol(notNull=True)
lib_id = StringCol(notNull=True)
deleted = BoolCol(notNull=True)
extension = ForeignKey('Extension', notNull=True)
date = DateCol(notNull=True)
language = ForeignKey('Language')
title_idx = DatabaseIndex(title)
series_idx = DatabaseIndex(series)
ser_no_idx = DatabaseIndex(ser_no)
archive_idx = DatabaseIndex(archive)
archive_file_idx = DatabaseIndex(archive, file, unique=True)
file_idx = DatabaseIndex(file)
size_idx = DatabaseIndex(size)
deleted_idx = DatabaseIndex(deleted)
extension_idx = DatabaseIndex(extension)
date_idx = DatabaseIndex(date)
language_idx = DatabaseIndex(language)
@property
def author1(self):
return self.authors[0].fullname
@property
def author_list(self):
return u', '.join([a.fullname for a in self.authors])
@property
def genre1name(self):
return self.genres[0].name
@property
def genre1title(self):
return self.genres[0].title
@property
def genre_name_list(self):
return u', '.join([g.name for g in self.genres])
@property
def genre_title_list(self):
return u', '.join([g.title for g in self.genres])
@property
def ext(self):
return self.extension.name
@property
def lang(self):
return self.language.name
[документация]class BookGenre(SQLObject):
class sqlmeta:
table = "book_genre"
book = ForeignKey('Book', notNull=True, cascade=True)
genre = ForeignKey('Genre', notNull=True, cascade=True)
book_idx = DatabaseIndex(book)
genre_idx = DatabaseIndex(genre)
main_idx = DatabaseIndex(book, genre, unique=True)
[документация]class Extension(SQLObject):
name = UnicodeCol(notNull=True, unique=True)
count = IntCol(notNull=True)
count_idx = DatabaseIndex(count)
[документация]class Genre(SQLObject):
name = UnicodeCol(notNull=True, unique=True)
title = UnicodeCol(notNull=True)
count = IntCol(notNull=True)
books = RelatedJoin('Book', otherColumn='book_id',
intermediateTable='book_genre',
createRelatedTable=False)
title_idx = DatabaseIndex(title)
count_idx = DatabaseIndex(count)
[документация]class Language(SQLObject):
name = UnicodeCol(notNull=True, unique=True)
count = IntCol(notNull=True)
count_idx = DatabaseIndex(count)
def _find_sqlite_db_dirs_posix():
db_dirs = []
if 'XDG_CACHE_HOME' in os.environ:
db_dirs.append(os.environ['XDG_CACHE_HOME'])
home_cache = os.path.expanduser('~/.cache')
if home_cache not in db_dirs:
db_dirs.append(home_cache)
return db_dirs
def find_sqlite_db_dirs():
if os.name == 'posix':
return _find_sqlite_db_dirs_posix()
raise OSError("Unknow OS")
def find_sqlite_dburi(db_dirs=None):
if db_dirs is None:
db_dirs = find_sqlite_db_dirs()
for d in db_dirs:
db_file = os.path.join(d, 'm_librarian.sqlite')
if os.path.exists(db_file):
break
else:
# octal; -rw-------;
# make the database file/directory readable/writeable only by the user
os.umask(0o66)
db_dir = db_dirs[0]
try:
os.makedirs(db_dir)
except OSError: # Perhaps already exists
pass
db_file = os.path.join(db_dir, 'm_librarian.sqlite')
return 'sqlite://%s' % db_file.replace(os.sep, '/')
[документация]def open_db(db_uri=None):
if db_uri is None:
db_uri = get_config().get('database', 'URI') or find_sqlite_dburi()
if '://' not in db_uri:
db_uri = 'sqlite://' + os.path.abspath(db_uri).replace(os.sep, '/')
sqlhub.processConnection = connection = connectionForURI(db_uri)
if connection.dbName == 'sqlite':
def lower(s):
if isinstance(s, string_type):
return s.lower()
return s
sqlite = connection.module
class MLConnection(sqlite.Connection):
def __init__(self, *args, **kwargs):
super(MLConnection, self).__init__(*args, **kwargs)
self.create_function('lower', 1, lower)
# This hack must be done at the very beginning, before the first query
connection._connOptions['factory'] = MLConnection
# Speedup SQLite connection
connection.query("PRAGMA synchronous=OFF")
connection.query("PRAGMA count_changes=OFF")
connection.query("PRAGMA journal_mode=MEMORY")
connection.query("PRAGMA temp_store=MEMORY")
[документация]def init_db():
try:
Book.select()[0]
except IndexError: # Table exists but is empty
return
except dberrors.Error:
for table in Author, Extension, Genre, Language, Book, \
AuthorBook, BookGenre:
table.createTable()
else:
return
[документация]def insert_name(table, name, **kw):
try:
return table.byName(name)
except SQLObjectNotFound:
return table(name=name, count=0, **kw)
[документация]def insert_author(surname, name, misc_name):
try:
return Author.full_name_idx.get(
surname=surname, name=name, misc_name=misc_name)
except SQLObjectNotFound:
return Author(surname=surname, name=name, misc_name=misc_name, count=0)
[документация]def update_counters(pbar_cb=None):
if pbar_cb:
count = 0
for table in Author, Extension, Genre, Language:
count += table.select().count()
pbar_cb.set_max(count)
if pbar_cb:
count = 0
for author in Author.select():
author.count = AuthorBook.select(AuthorBook.q.author == author).count()
if pbar_cb:
count += 1
pbar_cb.display(count)
for ext in Extension.select():
ext.count = Book.select(Book.q.extension == ext.id).count()
if pbar_cb:
count += 1
pbar_cb.display(count)
for genre in Genre.select():
genre.count = BookGenre.select(BookGenre.q.genre == genre).count()
if pbar_cb:
count += 1
pbar_cb.display(count)
for language in Language.select():
language.count = Book.select(Book.q.language == language.id).count()
if pbar_cb:
count += 1
pbar_cb.display(count)
if pbar_cb:
pbar_cb.close()
def test():
db_dirs = find_sqlite_db_dirs()
print("DB dirs:", db_dirs)
print("DB URI:", find_sqlite_dburi())
if __name__ == '__main__':
test()