# -*- coding: utf-8
from django.core.files import File
+from django.core.urlresolvers import reverse
from librarian import DocProvider, IOFile
from librarian.pyhtml import EduModuleFormat
+from librarian.pypdf import EduModulePDFFormat
+from librarian.pdf_from_html import EduModulePdfFromHtmlFormat
from .models import Lesson, Attachment
+from fnpdjango.utils.text.slughifi import slughifi
+
+
+# TODO: Using sorl.thumbnail for now,
+# but this should be done in Librarian,
+# directly using convert or PIL as a fallback.
+def get_image(src_img_path, width=None, default_width=1600, formats=('PNG', 'JPEG', 'GIF')):
+ """ Returns an object with `url` and `storage` attributes,
+ or None if using the original image is OK.
+ """
+
+ from PIL import Image
+ from sorl.thumbnail import get_thumbnail
+
+ # Does it need converting?
+ # Yes, if width is given explicitly.
+ convert = width is not None
+ if not convert:
+ # Looks like it doesn't need converting.
+ # But let's try opening it and checking its type.
+ try:
+ simg = Image.open(src_img_path)
+ except IOError:
+ # It doesn't look like image,
+ # but maybe it's convertable to one.
+ convert = True
+ else:
+ if simg.format not in formats:
+ # It's an image, but it's in some weird format.
+ convert = True
+ width = simg.size[0]
+
+ if convert:
+ if width is None:
+ width = default_width
+ try:
+ return get_thumbnail(src_img_path, '%sx%s' % (width, 10*width))
+ except:
+ # hard to predict what solr raises on invalid image
+ return None
+ else:
+ return None
class HtmlFormat(EduModuleFormat):
- def url_for_material(self, slug, fmt=None):
+ IMAGE_FORMATS = ('PNG', 'JPEG', 'GIF')
+ DEFAULT_IMAGE_WIDTH = 1600
+
+ 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,
+ slug=slug, ext=fmt)
+ except Attachment.DoesNotExist, e:
+ # If attached to source IOFile, save now.
+ att_name = "%s.%s" % (slug, fmt)
+ try:
+ att_file = self.wldoc.source.attachments[att_name]
+ except KeyError:
+ print u"ATTACHMENT MISSING:", att_name
+ raise self.MaterialNotFound()
+ else:
+ 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
+ else:
+ 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):
+ try:
+ src_img = self.find_attachment(slug, fmt).file
+ except self.MaterialNotFound:
+ return ''
+ img = get_image(src_img.path, width, self.DEFAULT_IMAGE_WIDTH, self.IMAGE_FORMATS)
+ return (img or src_img).url
+
+ def text_to_anchor(self, text):
+ return slughifi(text)
+
+ def get_forma_url(self, forma):
+ return '%s#%s' % (
+ reverse('catalogue_lesson', args=['metody']),
+ self.text_to_anchor(forma)
+ )
+
+ def get_help_url(self, naglowek):
+ return '%s%s#%s' % (
+ '//edukacjamedialna.edu.pl',
+ reverse('info', args=['jak-korzystac/']),
+ self.naglowek_to_anchor(naglowek)
+ )
+
+
+class PdfFormat(EduModulePDFFormat):
+ IMAGE_FORMATS = ('PNG', 'JPEG', 'GIF')
+ DEFAULT_IMAGE_WIDTH = 1600
+ def get_image(self, name):
+ src_img = super(PdfFormat, self).get_image(name)
+ img = get_image(
+ src_img.get_filename(),
+ default_width=self.DEFAULT_IMAGE_WIDTH,
+ formats=self.IMAGE_FORMATS)
+ if img:
+ return IOFile.from_filename(img.storage.path(img))
+ else:
+ return src_img
+
+
+class PdfFromHtmlFormat(EduModulePdfFromHtmlFormat):
+ IMAGE_FORMATS = ('PNG', 'JPEG', 'GIF')
+ DEFAULT_IMAGE_WIDTH = 1600
+
+ def find_attachment(self, slug, fmt):
+ lesson_slug = self.wldoc.book_info.url.slug
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 image(self, slug, fmt, width=None):
+ try:
+ src_img = self.find_attachment(slug, fmt).file
+ except self.MaterialNotFound:
+ return None
+ img = get_image(src_img.path, width, self.DEFAULT_IMAGE_WIDTH, self.IMAGE_FORMATS)
+ return img or src_img
+
+ def url_for_image(self, slug, fmt, image=None, **kwargs):
+ img = image or self.image(slug, fmt, **kwargs)
+ if img:
+ return img.url
+ else:
+ return ''
+
+ def text_to_anchor(self, text):
+ return slughifi(text)
class OrmDocProvider(DocProvider):
fnp / edumed.git / blobdiff