Adding library own page

[wolnelektury.git] / apps / picture / models.py

diff --git a/apps/picture/models.py b/apps/picture/models.py
index af691f8..c34b39a 100644 (file)
--- a/apps/picture/models.py
+++ b/apps/picture/models.py
@@ -1,8 +1,16 @@
 from django.db import models
 import catalogue.models
 from django.db import models
 import catalogue.models

-from catalogue.fields import OverwritingFileField
+from django.db.models import permalink
+from sorl.thumbnail import ImageField

 from django.conf import settings
 from django.core.files.storage import FileSystemStorage
 from django.conf import settings
 from django.core.files.storage import FileSystemStorage

+from django.utils.datastructures import SortedDict
+from django.template.loader import render_to_string
+from django.core.cache import get_cache
+from catalogue.utils import split_tags
+from django.utils.safestring import mark_safe
+from fnpdjango.utils.text.slughifi import slughifi
+

 from django.utils.translation import ugettext_lazy as _
 from newtagging import managers
 from os import path
 from django.utils.translation import ugettext_lazy as _
 from newtagging import managers
 from os import path


@@ -22,7 +30,7 @@ class Picture(models.Model):
     created_at  = models.DateTimeField(_('creation date'), auto_now_add=True, db_index=True)
     changed_at  = models.DateTimeField(_('creation date'), auto_now=True, db_index=True)
     xml_file    = models.FileField('xml_file', upload_to="xml", storage=picture_storage)
     created_at  = models.DateTimeField(_('creation date'), auto_now_add=True, db_index=True)
     changed_at  = models.DateTimeField(_('creation date'), auto_now=True, db_index=True)
     xml_file    = models.FileField('xml_file', upload_to="xml", storage=picture_storage)

-    image_file  = models.FileField(_('image_file'), upload_to="images", storage=picture_storage)
+    image_file  = ImageField(_('image_file'), upload_to="images", storage=picture_storage)

     objects     = models.Manager()
     tagged      = managers.ModelTaggedItemManager(catalogue.models.Tag)
     tags        = managers.TagDescriptor(catalogue.models.Tag)
     objects     = models.Manager()
     tagged      = managers.ModelTaggedItemManager(catalogue.models.Tag)
     tags        = managers.TagDescriptor(catalogue.models.Tag)


@@ -43,26 +51,49 @@ class Picture(models.Model):
 
         ret = super(Picture, self).save(force_insert, force_update)
 
 
         ret = super(Picture, self).save(force_insert, force_update)
 

+        if reset_short_html:
+            self.reset_short_html()
+

         return ret
 
     def __unicode__(self):
         return self.title
 
         return ret
 
     def __unicode__(self):
         return self.title
 

+    @permalink
+    def get_absolute_url(self):
+        return ('picture.views.picture_detail', [self.slug])
+

     @classmethod
     @classmethod

-    def from_xml_file(cls, xml_file, images_path=None, overwrite=False):
+    def from_xml_file(cls, xml_file, image_file=None, overwrite=False):

         """
         Import xml and it's accompanying image file.
         """
         Import xml and it's accompanying image file.

+        If image file is missing, it will be fetched by librarian.picture.ImageStore
+        which looks for an image file in the same directory the xml is, with extension matching
+        its mime type.

         """
         """

+        from sortify import sortify

         from django.core.files import File
         from django.core.files import File

-        from librarian.picture import WLPicture
+        from librarian.picture import WLPicture, ImageStore

         close_xml_file = False
         close_xml_file = False

+        close_image_file = False
+        # class SimpleImageStore(object):
+        #     def path(self_, slug, mime_type):
+        #         """Returns the image file. Ignores slug ad mime_type."""
+        #         return image_file
+
+        if image_file is not None and not isinstance(image_file, File):
+            image_file = File(open(image_file))
+            close_image_file = True

 
         if not isinstance(xml_file, File):
             xml_file = File(open(xml_file))
             close_xml_file = True
 
         if not isinstance(xml_file, File):
             xml_file = File(open(xml_file))
             close_xml_file = True

+

         try:
             # use librarian to parse meta-data
         try:
             # use librarian to parse meta-data

-            picture_xml = WLPicture.from_file(xml_file)
+            picture_xml = WLPicture.from_file(xml_file,
+                                              image_store=ImageStore(picture_storage.path('images')))
+                    # image_store=SimpleImageStore

 
             picture, created = Picture.objects.get_or_create(slug=picture_xml.slug)
             if not created and not overwrite:
 
             picture, created = Picture.objects.get_or_create(slug=picture_xml.slug)
             if not created and not overwrite:


@@ -70,17 +101,95 @@ class Picture(models.Model):
 
             picture.title = picture_xml.picture_info.title
 
 
             picture.title = picture_xml.picture_info.title
 

-            picture.tags = catalogue.models.Tag.tags_from_info(picture_xml.picture_info)
+            motif_tags = set()
+            for part in picture_xml.partiter():
+                for motif in part['themes']:
+                    tag, created = catalogue.models.Tag.objects.get_or_create(slug=slughifi(motif), category='theme')
+                    if created:
+                        tag.name = motif
+                        tag.sort_key = sortify(tag.name)
+                        tag.save()
+                    motif_tags.add(tag)

 
 

-            img = picture_xml.image_file()
-            try:
-                picture.image_file.save(path.basename(picture_xml.image_path), File(img))
-            finally:
-                img.close()
+            picture.tags = catalogue.models.Tag.tags_from_info(picture_xml.picture_info) + \
+                list(motif_tags)
+
+            if image_file is not None:
+                img = image_file
+            else:
+                img = picture_xml.image_file()
+
+            # FIXME: hardcoded extension
+            picture.image_file.save(path.basename(picture_xml.image_path), File(img))

 
             picture.xml_file.save("%s.xml" % picture.slug, File(xml_file))
             picture.save()
         finally:
             if close_xml_file:
                 xml_file.close()
 
             picture.xml_file.save("%s.xml" % picture.slug, File(xml_file))
             picture.save()
         finally:
             if close_xml_file:
                 xml_file.close()

+            if close_image_file:
+                image_file.close()

         return picture
         return picture

+
+    @classmethod
+    def picture_list(cls, filter=None):
+        """Generates a hierarchical listing of all pictures
+        Pictures are optionally filtered with a test function.
+        """
+
+        pics = cls.objects.all().order_by('sort_key')\
+            .only('title', 'slug', 'image_file')
+
+        if filter:
+            pics = pics.filter(filter).distinct()
+
+        pics_by_author = SortedDict()
+        orphans = []
+        for tag in catalogue.models.Tag.objects.filter(category='author'):
+            pics_by_author[tag] = []
+
+        for pic in pics.iterator():
+            authors = list(pic.tags.filter(category='author'))
+            if authors:
+                for author in authors:
+                    pics_by_author[author].append(pic)
+            else:
+                orphans.append(pic)
+
+        return pics_by_author, orphans
+
+    @property
+    def info(self):
+        if not hasattr(self, '_info'):
+            from librarian import dcparser
+            from librarian import picture
+            info = dcparser.parse(self.xml_file.path, picture.PictureInfo)
+            self._info = info
+        return self._info
+
+    def reset_short_html(self):
+        if self.id is None:
+            return
+
+        cache_key = "Picture.short_html/%d" % (self.id)
+        get_cache('permanent').delete(cache_key)
+
+    def short_html(self):
+        if self.id:
+            cache_key = "Picture.short_html/%d" % (self.id)
+            short_html = get_cache('permanent').get(cache_key)
+        else:
+            short_html = None
+
+        if short_html is not None:
+            return mark_safe(short_html)
+        else:
+            tags = self.tags.filter(category__in=('author', 'kind', 'epoch'))
+            tags = split_tags(tags)
+
+            short_html = unicode(render_to_string('picture/picture_short.html',
+                {'picture': self, 'tags': tags}))
+
+            if self.id:
+                get_cache('permanent').set(cache_key, short_html)
+            return mark_safe(short_html)