parallel-library/cps/db.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

from sqlalchemy import *
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import *
import os
from cps import config
import re
import ast

#calibre sort stuff
title_pat = re.compile(config.TITLE_REGEX, re.IGNORECASE)
def title_sort(title):
    match = title_pat.search(title)
    if match:
        prep = match.group(1)
        title = title.replace(prep, '') + ', ' + prep
    return title.strip()


dbpath = os.path.join(config.DB_ROOT, "metadata.db")
engine = create_engine('sqlite:///{0}'.format(dbpath), echo=False)
conn = engine.connect()
conn.connection.create_function('title_sort', 1, title_sort)
Base = declarative_base()

books_authors_link = Table('books_authors_link', Base.metadata,
    Column('book', Integer, ForeignKey('books.id'), primary_key=True),
    Column('author', Integer, ForeignKey('authors.id'), primary_key=True)
    )

books_tags_link = Table('books_tags_link', Base.metadata,
    Column('book', Integer, ForeignKey('books.id'), primary_key=True),
    Column('tag', Integer, ForeignKey('tags.id'), primary_key=True)
    )

books_series_link = Table('books_series_link', Base.metadata,
    Column('book', Integer, ForeignKey('books.id'), primary_key=True),
    Column('series', Integer, ForeignKey('series.id'), primary_key=True)
    )

books_ratings_link = Table('books_ratings_link', Base.metadata,
    Column('book', Integer, ForeignKey('books.id'), primary_key=True),
    Column('rating', Integer, ForeignKey('ratings.id'), primary_key=True)
    )

books_languages_link = Table('books_languages_link', Base.metadata,
    Column('book', Integer, ForeignKey('books.id'), primary_key=True),
    Column('lang_code', Integer, ForeignKey('languages.id'), primary_key=True)
    )

cc = conn.execute("SELECT id, datatype FROM custom_columns")
cc_ids = []
cc_exceptions = ['bool', 'datetime', 'int', 'comments', 'float', 'composite','series' ]
books_custom_column_links = {}
for row in cc:
    if row.datatype not in cc_exceptions:
        books_custom_column_links[row.id] = Table('books_custom_column_' + str(row.id) + '_link', Base.metadata,
            Column('book', Integer, ForeignKey('books.id'), primary_key=True),
            Column('value', Integer, ForeignKey('custom_column_' + str(row.id) + '.id'), primary_key=True)
            )
        #books_custom_column_links[row.id]=
        cc_ids.append(row.id)

cc_classes = {}
for id in cc_ids:
    ccdict={'__tablename__':'custom_column_' + str(id),
        'id':Column(Integer, primary_key=True),
        'value':Column(String)}
    cc_classes[id] = type('Custom_Column_' + str(id), (Base,), ccdict)

class Comments(Base):
    __tablename__ = 'comments'

    id = Column(Integer, primary_key=True)
    text = Column(String)
    book = Column(Integer, ForeignKey('books.id'))

    def __init__(self, text, book):
        self.text = text
        self.book = book

    def __repr__(self):
        return u"<Comments({0})>".format(self.text)


class Tags(Base):
    __tablename__ = 'tags'

    id = Column(Integer, primary_key=True, autoincrement=True)
    name = Column(String)

    def __init__(self, name):
        self.name = name

    def __repr__(self):
        return u"<Tags('{0})>".format(self.name)

class Authors(Base):
    __tablename__ = 'authors'

    id = Column(Integer, primary_key=True)
    name = Column(String)
    sort = Column(String)
    link = Column(String)

    def __init__(self, name, sort, link):
        self.name = name
        self.sort = sort
        self.link = link

    def __repr__(self):
        return u"<Authors('{0},{1}{2}')>".format(self.name, self.sort, self.link)

class Series(Base):
    __tablename__ = 'series'

    id = Column(Integer, primary_key=True)
    name = Column(String)
    sort = Column(String)

    def __init__(self, name, sort):
        self.name = name
        self.sort = sort

    def __repr__(self):
        return u"<Series('{0},{1}')>".format(self.name, self.sort)

class Ratings(Base):
    __tablename__ = 'ratings'

    id = Column(Integer, primary_key=True)
    rating = Column(Integer)

    def __init__(self,rating):
        self.rating = rating

    def __repr__(self):
        return u"<Ratings('{0}')>".format(self.rating)

class Languages(Base):
    __tablename__ = 'languages'

    id = Column(Integer, primary_key=True)
    lang_code = Column(String)

    def __init__(self,lang_code):
        self.lang_code = lang_code

    def __repr__(self):
        return u"<Languages('{0}')>".format(self.lang_code)

class Data(Base):
    __tablename__ = 'data'

    id = Column(Integer, primary_key=True)
    book = Column(Integer, ForeignKey('books.id'))
    format = Column(String)
    uncompressed_size = Column(Integer)
    name = Column(String)

    def __init__(self, book, format, uncompressed_size, name):
        self.book = book
        self.format = format
        self.uncompressed_size = uncompressed_size
        self.name = name

    def __repr__(self):
        return u"<Data('{0},{1}{2}{3}')>".format(self.book, self.format, self.uncompressed_size, self.name)

class Books(Base):
    __tablename__ = 'books'

    id = Column(Integer, primary_key=True)
    title = Column(String)
    sort = Column(String)
    author_sort = Column(String)
    timestamp = Column(String)
    pubdate = Column(String)
    series_index = Column(String)
    last_modified = Column(String)
    path = Column(String)
    has_cover = Column(Integer)

    authors = relationship('Authors', secondary=books_authors_link, backref='books')
    tags = relationship('Tags', secondary=books_tags_link, backref='books')
    comments = relationship('Comments', backref='books')
    data = relationship('Data', backref='books')
    series = relationship('Series', secondary=books_series_link, backref='books')
    ratings = relationship('Ratings', secondary=books_ratings_link, backref='books')
    languages = relationship('Languages', secondary=books_languages_link, backref='books')
    
    def __init__(self, title, sort, author_sort, timestamp, pubdate, series_index, last_modified, path, has_cover, authors, tags):
        self.title = title
        self.sort = sort
        self.author_sort = author_sort
        self.timestamp = timestamp
        self.pubdate = pubdate
        self.series_index = series_index
        self.last_modified = last_modified
        self.path = path
        self.has_cover = has_cover

    def __repr__(self):
        return u"<Books('{0},{1}{2}{3}{4}{5}{6}{7}{8}')>".format(self.title, self.sort, self.author_sort, self.timestamp, self.pubdate, self.series_index, self.last_modified ,self.path, self.has_cover)
for id in cc_ids:
    setattr(Books, 'custom_column_' + str(id), relationship(cc_classes[id], secondary=books_custom_column_links[id], backref='books'))

class Custom_Columns(Base):
    __tablename__ = 'custom_columns'
    
    id = Column(Integer,primary_key=True)
    label = Column(String)
    name = Column(String)
    datatype = Column(String)
    mark_for_delete = Column(Boolean)
    editable = Column(Boolean)
    display = Column(String)
    is_multiple = Column(Boolean)
    normalized = Column(Boolean)
    
    def get_display_dict(self):
        display_dict = ast.literal_eval(self.display)
        return display_dict

#Base.metadata.create_all(engine)
Session = sessionmaker()
Session.configure(bind=engine)
session = Session()