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[edumed.git] / catalogue / publish.py

diff --git a/catalogue/publish.py b/catalogue/publish.py
index 9f79dae..bc2e37a 100755 (executable)
--- a/catalogue/publish.py
+++ b/catalogue/publish.py
@@ -1,13 +1,58 @@
 # -*- coding: utf-8
 # -*- coding: utf-8

-from django.core.files.base import ContentFile

 from django.core.files import File
 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 .models import Lesson, Attachment
 from librarian import DocProvider, IOFile
 from librarian.pyhtml import EduModuleFormat
 from librarian.pypdf import EduModulePDFFormat
 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):
 
 
 class HtmlFormat(EduModuleFormat):

+    IMAGE_FORMATS = ('PNG', 'JPEG', 'GIF')
+    DEFAULT_IMAGE_WIDTH = 1600
+

     def find_attachment(self, slug, fmt):
         lesson_slug = self.wldoc.book_info.url.slug
         try:
     def find_attachment(self, slug, fmt):
         lesson_slug = self.wldoc.book_info.url.slug
         try:


@@ -34,35 +79,44 @@ class HtmlFormat(EduModuleFormat):
         return self.find_attachment(slug, fmt).file.url
 
     def url_for_image(self, slug, fmt, width=None):
         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:
         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
+            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):
 
 class PdfFormat(EduModulePDFFormat):

-    pass
+    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 OrmDocProvider(DocProvider):
 
 
 class OrmDocProvider(DocProvider):