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

class ResourceInterface:
    @classmethod
    def __subclasshook__(cls, subclass):
        return (hasattr(subclass, 'format_text') and
                callable(subclass.format_text) and
                hasattr(subclass, 'format_data') and
                callable(subclass.format_data) or
                NotImplemented)

class Author(ResourceInterface):

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

    def format_text(self):
        return self.author

    def format_data(self):
        return self.sort

class Book(ResourceInterface):

    def __init__(self, title, author, file):
        self.title = title
        self.author = author
        self.file = file    

    def format_text(self):
        return self.title + " - " + self.author

    def format_data(self):
        return self.file

class CorsoDiStudio(ResourceInterface):

    def __init__(self, cds):
        self.cds = cds
    
    def format_text(self):
        return self.cds

    def format_data(self):
        return self.cds


def book_factory(cursor, row):
    return Book(row[0], row[1], row[2]) 

def author_factory(cursor, row):
    return Author(row[0], row[1])

#def cds_factory(cursor, row):
#    pass