BibrecPage.py

#!/usr/bin/env python
#  -*- mode: python; indent-tabs-mode: nil; -*- coding: utf-8 -*-

"""
BibrecPage.py

Copyright 2009-2010 by Marcello Perathoner

Distributable under the GNU General Public License Version 3 or newer.

The bibrec page.

"""

from __future__ import unicode_literals

import cherrypy

from libgutenberg import GutenbergGlobals as gg
from i18n_tool import ugettext as _
from i18n_tool import ungettext as __

import BaseSearcher
import Page


class BibrecPage (Page.Page):
    """ Implements the bibrec page. """

    def split_summary(self, text, word_count=72):
        """ Split summary into initial and remaining parts for toggling in the interface. """
        if not text:
            return None, None
        words = text.split()
        initial = ' '.join(words[:word_count])
        remaining = ' '.join(words[word_count:]) if len(words) > word_count else ''
        return initial, remaining


    def get_book_summary(self, dc, book_id):
        for marc in dc.marcs:
            if marc.code == '520' and "This is an automatically generated summary" in marc.text:
                return self.split_summary(marc.text)
        return None, None


    def index (self, **dummy_kwargs):
        """ A bibrec page. """

        os = BaseSearcher.OpenSearch ()

        os.log_request ('bibrec')

        dc = BaseSearcher.DC (cherrypy.engine.pool)

        # the bulk of the work is done here
        dc.load_from_database (os.id)
        if not dc.files:
            # NOTE: Error message
            raise cherrypy.HTTPError (404, _('No ebook by that number.'))

        # add these fields so we won't have to test for their existence later
        dc.extra_info = None
        dc.url = None

        for file_ in dc.files:
            # note that generated zip files don't get the "generated" bit or filetype set
            if not file_.generated and file_.filetype:
                dc.update_date = max(dc.update_date, file_.modified.date())

        dc.translate ()
        dc.header = gg.cut_at_newline (dc.title)
        os.title = dc.make_pretty_title ()
        dc.extra_info = ''
        dc.class_ = BaseSearcher.ClassAttr ()
        dc.order = 10
        dc.icon = 'book'
        if 'Sound' in dc.categories:
            dc.icon = 'audiobook'
        os.title_icon = dc.icon
        os.twit = os.title
        os.qrcode_url = '/cache/epub/%d/pg%d.qrcode.png' % (os.id, os.id)

        initial_summary, remaining_summary = self.get_book_summary(dc, os.id)
        os.initial_summary = initial_summary
        os.remaining_summary = remaining_summary


        os.entries.append (dc)

        s = cherrypy.session
        last_visited = s.get ('last_visited', [])
        last_visited.append (os.id)
        s['last_visited'] = last_visited

        # can we find some meaningful breadcrumbs ?
        for a in dc.authors:
            if a.marcrel in ('aut', 'cre'):
                book_cnt = BaseSearcher.sql_get (
                    "select count (*) from mn_books_authors where fk_authors = %(aid)s", aid = a.id)
                if book_cnt > 1:
                    os.breadcrumbs.append ((
                        __('One by {author}', '{count} by {author}', book_cnt).format (
                                count = book_cnt, author = dc.make_pretty_name (a.name)),
                        _('Find more eBooks by the same author.'),
                         os.url ('author', id = a.id)
                        ))


        if os.format == 'html':
            cat = BaseSearcher.Cat ()
            cat.header = _('Similar Books')
            cat.title = _('Readers also downloaded…')
            cat.rel = 'related'
            cat.url = os.url ('also', id = os.id)
            cat.class_ += 'navlink grayed noprint'
            cat.icon = 'suggestion'
            cat.order = 30
            os.entries.append (cat)

            for bookshelf in dc.bookshelves:
                cat = BaseSearcher.Cat ()
                cat.title = _('In {bookshelf}').format (bookshelf = bookshelf.bookshelf)
                cat.rel = 'related'
                cat.url = os.url ('bookshelf', id = bookshelf.id)
                cat.class_ += 'navlink grayed'
                cat.icon = 'bookshelf'
                cat.order = 33
                os.entries.append (cat)

        os.total_results = 1

        os.template = 'bibrec'
        os.page = 'bibrec'
        os.og_type = 'book'
        os.finalize ()

        return self.format (os)