Generate tags for picture themes

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

diff --git a/apps/picture/models.py b/apps/picture/models.py
index af691f8..2d24408 100644 (file)
--- a/apps/picture/models.py
+++ b/apps/picture/models.py
@@ -1,8 +1,13 @@
 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.utils.datastructures import SortedDict
+from librarian import dcparser, picture
+from slughifi import slughifi
+
 from django.utils.translation import ugettext_lazy as _
 from newtagging import managers
 from os import path
@@ -22,7 +27,7 @@ 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)
-    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)
@@ -36,6 +41,9 @@ class Picture(models.Model):
         verbose_name = _('picture')
         verbose_name_plural = _('pictures')
 
+    URLID_RE = r'[a-z0-9-]+'
+    FILEID_RE = r'[a-z0-9-]+'
+
     def save(self, force_insert=False, force_update=False, reset_short_html=True, **kwargs):
         from sortify import sortify
 
@@ -48,11 +56,19 @@ class Picture(models.Model):
     def __unicode__(self):
         return self.title
 
+    @permalink
+    def get_absolute_url(self):
+        return ('picture.views.picture_detail', [self.urlid()])
+
+    def urlid(self):
+        return self.slug
+
     @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.
         """
+        from sortify import sortify
         from django.core.files import File
         from librarian.picture import WLPicture
         close_xml_file = False
@@ -64,23 +80,70 @@ class Picture(models.Model):
             # use librarian to parse meta-data
             picture_xml = WLPicture.from_file(xml_file)
 
-            picture, created = Picture.objects.get_or_create(slug=picture_xml.slug)
+            pict, created = Picture.objects.get_or_create(slug=picture_xml.slug)
             if not created and not overwrite:
                 raise Picture.AlreadyExists('Picture %s already exists' % picture_xml.slug)
 
-            picture.title = picture_xml.picture_info.title
+            pict.title = picture_xml.picture_info.title
+
+            #            from nose.tools import set_trace; set_trace()
+            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)
 
-            picture.tags = catalogue.models.Tag.tags_from_info(picture_xml.picture_info)
+            pict.tags = catalogue.models.Tag.tags_from_info(picture_xml.picture_info) + \
+                list(motif_tags)
 
-            img = picture_xml.image_file()
-            try:
-                picture.image_file.save(path.basename(picture_xml.image_path), File(img))
-            finally:
-                img.close()
+            if image_file is not None:
+                img = image_file
+            else:
+                img = picture_xml.image_file()
 
-            picture.xml_file.save("%s.xml" % picture.slug, File(xml_file))
-            picture.save()
+            pict.image_file.save(path.basename(picture_xml.image_path), File(img))
+
+            pict.xml_file.save("%s.xml" % pict.slug, File(xml_file))
+            pict.save()
         finally:
             if close_xml_file:
                 xml_file.close()
-        return picture
+        return pict
+
+    @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:
+            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'):
+            info = dcparser.parse(self.xml_file.path, picture.PictureInfo)
+            self._info = info
+        return self._info