# -*- coding: utf-8
+from django.core.files.base import ContentFile
from django.core.files import File
from librarian import DocProvider, IOFile
from librarian.pyhtml import EduModuleFormat
+from librarian.pypdf import EduModulePDFFormat
from .models import Lesson, Attachment
class HtmlFormat(EduModuleFormat):
- def url_for_material(self, slug, fmt=None):
+ def find_attachment(self, slug, fmt):
lesson_slug = self.wldoc.book_info.url.slug
- if fmt is None:
- # We could try and find the file by slug here, but we won't.
- # User should supply the format explicitly anyway.
- fmt = self.DEFAULT_MATERIAL_FORMAT
-
try:
# If already saved, use it.
att = Attachment.objects.get(lesson__slug=lesson_slug,
lesson = Lesson.objects.get(slug=lesson_slug)
att = lesson.attachment_set.create(slug=slug, ext=fmt)
att.file.save(att_name, File(att_file.get_file()))
- return att.file.url
+ return att
else:
- return att.file.url
+ return att
+
+ def url_for_material(self, slug, fmt):
+ return self.find_attachment(slug, fmt).file.url
+
+ def url_for_image(self, slug, fmt, width=None):
+ if width is None:
+ return self.url_for_material(slug, fmt)
+
+ lesson_slug = self.wldoc.book_info.url.slug
+ th_slug = "thumb/%s__th%d" % (slug, width)
+ try:
+ # If already saved, use it.
+ att = Attachment.objects.get(lesson__slug=lesson_slug,
+ slug=th_slug, ext=fmt)
+ except Attachment.DoesNotExist, e:
+ from PIL import Image
+ from StringIO import StringIO
+ # Find full image, create thumbnail, save.
+ src_att = self.find_attachment(slug, fmt)
+ simg = Image.open(src_att.file.path)
+ size = (width, simg.size[1]*width/simg.size[0])
+ simg = simg.resize(size, Image.ANTIALIAS)
+
+ tempfile = StringIO()
+ img_format = "JPEG" if fmt.upper() == "JPG" else fmt
+ simg.save(tempfile, format=img_format)
+ att_name = "%s.%s" % (th_slug, fmt)
+ lesson = Lesson.objects.get(slug=lesson_slug)
+ att = lesson.attachment_set.create(slug=th_slug, ext=fmt)
+ att.file.save(att_name, ContentFile(tempfile.getvalue()))
+ return att.file.url
+
+class PdfFormat(EduModulePDFFormat):
+ pass
class OrmDocProvider(DocProvider):