2014-12-09 19:56:27 +00:00
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"""
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2016-03-28 18:30:05 +00:00
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Utilities for calling mobigen for management. do not use in application
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2014-12-09 19:56:27 +00:00
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"""
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2015-01-23 23:52:35 +00:00
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from itertools import islice
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from StringIO import StringIO
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import uuid
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from django.core.files.storage import default_storage
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from django.core.files.base import ContentFile, File
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2015-01-26 20:19:26 +00:00
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from regluit.core.models import (Campaign, Ebook)
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2015-02-02 23:05:36 +00:00
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from regluit.core import parameters
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2016-03-28 18:30:05 +00:00
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from regluit.core.mobi import convert_to_mobi
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2015-01-23 23:52:35 +00:00
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# compute whether we can apply mobigen to a given edition to produce a mobi file
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# need to have an ebook in epub or pdf format
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# possible return values: already has a mobi file / can generate a mobi file / not possible
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def edition_mobi_status(edition):
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"""
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for a given edition, return:
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* 1 if there is already a mobi ebook
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* 0 if there is none but we have an epub or html to convert from
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* -1 for no epub/html to convert from
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"""
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formats = set([ebook.format for ebook in edition.work.ebooks()])
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if 'mobi' in formats:
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return 1
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elif ('epub' in formats) or ('html' in formats):
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return 0
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else:
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return -1
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def write_file_to_storage(file_object, content_type, path):
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"""
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write file_object to the default_storage at given path
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"""
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file_s3 = ContentFile(file_object)
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file_s3.content_type = content_type
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default_storage.save(path, file_s3)
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return file_s3
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# generator for editions to add mobi to
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# campaigns that can have mobi files but don't yet.
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def editions_to_convert():
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for campaign in Campaign.objects.filter(edition__ebooks__isnull=False).distinct():
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2015-02-02 23:05:36 +00:00
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# need to make sure campaign type is not B2U because kindlegen is for books we give awy free of charge
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if (edition_mobi_status(campaign.edition) == 0) and (campaign.type != parameters.BUY2UNGLUE): # possible to generate mobi
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2015-01-23 23:52:35 +00:00
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yield campaign.edition
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def generate_mobi_ebook_for_edition(edition):
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# pull out the sister edition to convert from
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sister_ebook = edition.ebooks.filter(format__in=['epub', 'html'])[0]
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# run the conversion process
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output = convert_to_mobi(sister_ebook.url)
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#output = open("/Users/raymondyee/Downloads/hello.mobi").read()
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file_ = write_file_to_storage(output,
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"application/x-mobipocket-ebook",
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"/ebf/{0}.mobi".format(uuid.uuid4().get_hex()))
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# create a path for the ebookfile: IS THIS NECESSARY?
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# https://github.com/Gluejar/regluit/blob/25dcb06f464dc11b5e589ab6859dfcc487f8f3ef/core/models.py#L1771
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#ebfile = EbookFile(edition=edition, file=file_, format='mobi')
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#ebfile.save()
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# maybe need to create an ebook pointing to ebookFile ?
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# copy metadata from sister ebook
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ebfile_url = default_storage.url(file_.name)
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#print (ebfile_url)
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ebook = Ebook(url=ebfile_url,
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format="mobi",
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provider="Unglue.it",
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rights=sister_ebook.rights,
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edition=edition)
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ebook.save()
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return ebook
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