3 from __future__ import print_function
5 from sqlobject import SQLObject, StringCol, UnicodeCol, IntCol, BoolCol, \
6 ForeignKey, DateCol, DatabaseIndex, RelatedJoin, \
7 connectionForURI, sqlhub, SQLObjectNotFound, dberrors
8 from .compat import string_type
9 from .config import get_config
11 __all__ = ['Author', 'Book', 'Extension', 'Genre', 'Language',
12 'AuthorBook', 'BookGenre', 'open_db', 'init_db',
13 'insert_name', 'insert_author', 'update_counters',
17 class Author(SQLObject):
18 surname = UnicodeCol(notNull=True)
19 name = UnicodeCol(notNull=True)
20 misc_name = UnicodeCol(notNull=True)
21 count = IntCol(notNull=True)
22 books = RelatedJoin('Book', otherColumn='book_id',
23 intermediateTable='author_book',
24 createRelatedTable=False)
28 fullnames = filter(None, (self.surname, self.name, self.misc_name))
29 return ' '.join(fullnames)
31 full_name_idx = DatabaseIndex(surname, name, misc_name, unique=True)
32 count_idx = DatabaseIndex(count)
35 class AuthorBook(SQLObject):
38 author = ForeignKey('Author', notNull=True, cascade=True)
39 book = ForeignKey('Book', notNull=True, cascade=True)
40 author_idx = DatabaseIndex(author)
41 book_idx = DatabaseIndex(book)
42 main_idx = DatabaseIndex(author, book, unique=True)
45 class Book(SQLObject):
46 authors = RelatedJoin('Author',
47 intermediateTable='author_book',
48 createRelatedTable=False)
49 genres = RelatedJoin('Genre',
50 intermediateTable='book_genre',
51 createRelatedTable=False)
52 title = UnicodeCol(notNull=True)
53 series = UnicodeCol(notNull=True)
55 archive = StringCol(notNull=True)
56 file = StringCol(notNull=True)
57 size = IntCol(notNull=True)
58 lib_id = StringCol(notNull=True)
59 deleted = BoolCol(notNull=True)
60 extension = ForeignKey('Extension', notNull=True)
61 date = DateCol(notNull=True)
62 language = ForeignKey('Language')
63 title_idx = DatabaseIndex(title)
64 series_idx = DatabaseIndex(series)
65 ser_no_idx = DatabaseIndex(ser_no)
66 archive_idx = DatabaseIndex(archive)
67 archive_file_idx = DatabaseIndex(archive, file, unique=True)
68 file_idx = DatabaseIndex(file)
69 size_idx = DatabaseIndex(size)
70 deleted_idx = DatabaseIndex(deleted)
71 extension_idx = DatabaseIndex(extension)
72 date_idx = DatabaseIndex(date)
73 language_idx = DatabaseIndex(language)
76 class BookGenre(SQLObject):
79 book = ForeignKey('Book', notNull=True, cascade=True)
80 genre = ForeignKey('Genre', notNull=True, cascade=True)
81 book_idx = DatabaseIndex(book)
82 genre_idx = DatabaseIndex(genre)
83 main_idx = DatabaseIndex(book, genre, unique=True)
86 class Extension(SQLObject):
87 name = UnicodeCol(notNull=True, unique=True)
88 count = IntCol(notNull=True)
89 count_idx = DatabaseIndex(count)
92 class Genre(SQLObject):
93 name = UnicodeCol(notNull=True, unique=True)
94 title = UnicodeCol(notNull=True)
95 count = IntCol(notNull=True)
96 books = RelatedJoin('Book', otherColumn='book_id',
97 intermediateTable='book_genre',
98 createRelatedTable=False)
99 title_idx = DatabaseIndex(title)
100 count_idx = DatabaseIndex(count)
103 class Language(SQLObject):
104 name = UnicodeCol(notNull=True, unique=True)
105 count = IntCol(notNull=True)
106 count_idx = DatabaseIndex(count)
109 def _find_sqlite_db_dirs_posix():
111 if 'XDG_CACHE_HOME' in os.environ:
112 db_dirs.append(os.environ['XDG_CACHE_HOME'])
113 home_cache = os.path.expanduser('~/.cache')
114 if home_cache not in db_dirs:
115 db_dirs.append(home_cache)
119 def find_sqlite_db_dirs():
120 if os.name == 'posix':
121 return _find_sqlite_db_dirs_posix()
122 raise OSError("Unknow OS")
125 def find_sqlite_dburi(db_dirs=None):
127 db_dirs = find_sqlite_db_dirs()
129 db_file = os.path.join(d, 'm_librarian.sqlite')
130 if os.path.exists(db_file):
134 # make the database file/directory readable/writeable only by the user
139 except OSError: # Perhaps already exists
141 db_file = os.path.join(db_dir, 'm_librarian.sqlite')
143 return 'sqlite://%s' % db_file.replace(os.sep, '/')
146 def open_db(db_uri=None):
149 db_uri = get_config().get('database', 'URI')
151 db_uri = find_sqlite_dburi()
153 if '://' not in db_uri:
154 db_uri = 'sqlite://' + os.path.abspath(db_uri).replace(os.sep, '/')
156 sqlhub.processConnection = connection = connectionForURI(db_uri)
158 if connection.dbName == 'sqlite':
160 if isinstance(s, string_type):
164 sqlite = connection.module
166 class MLConnection(sqlite.Connection):
167 def __init__(self, *args, **kwargs):
168 super(MLConnection, self).__init__(*args, **kwargs)
169 self.create_function('lower', 1, lower)
171 # This hack must be done at the very beginning, before the first query
172 connection._connOptions['factory'] = MLConnection
174 # Speedup SQLite connection
175 connection.query("PRAGMA synchronous=OFF")
176 connection.query("PRAGMA count_changes=OFF")
177 connection.query("PRAGMA journal_mode=MEMORY")
178 connection.query("PRAGMA temp_store=MEMORY")
184 except IndexError: # Table exists but is empty
186 except dberrors.Error:
187 for table in Author, Extension, Genre, Language, Book, \
188 AuthorBook, BookGenre:
194 def insert_name(table, name, **kw):
196 return table.byName(name)
197 except SQLObjectNotFound:
198 return table(name=name, count=0, **kw)
201 def insert_author(surname, name, misc_name):
203 return Author.full_name_idx.get(
204 surname=surname, name=name, misc_name=misc_name)
205 except SQLObjectNotFound:
206 return Author(surname=surname, name=name, misc_name=misc_name, count=0)
209 def update_counters():
210 for author in Author.select():
211 author.count = AuthorBook.select(AuthorBook.q.author == author).count()
213 for ext in Extension.select():
214 ext.count = Book.select(Book.q.extension == ext.id).count()
216 for genre in Genre.select():
217 genre.count = BookGenre.select(BookGenre.q.genre == genre).count()
219 for language in Language.select():
220 language.count = Book.select(Book.q.language == language.id).count()
224 db_dirs = find_sqlite_db_dirs()
225 print("DB dirs:", db_dirs)
226 print("DB URI:", find_sqlite_dburi())
229 if __name__ == '__main__':