Add audience and thema data to catalogue. Also: nicer cover view.

[redakcja.git] / src / cover / models.py

diff --git a/src/cover/models.py b/src/cover/models.py
index c60efe1..d766222 100644 (file)
--- a/src/cover/models.py
+++ b/src/cover/models.py
@@ -1,14 +1,19 @@
 # This file is part of FNP-Redakcja, licensed under GNU Affero GPLv3 or later.
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 #
+from io import BytesIO
 from django.core.files.base import ContentFile
 from django.core.files.storage import FileSystemStorage
 from django.db import models
 from django.db.models.signals import post_save
 from django.dispatch import receiver
 from django.urls import reverse
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from django.contrib.sites.models import Site
+from PIL import Image as PILImage
+from librarian.dcparser import BookInfo
+from librarian.meta.types.person import Person
+from librarian.cover import make_cover
 from cover.utils import URLOpener
 
 
@@ -25,9 +30,29 @@ class Image(models.Model):
     license_name = models.CharField(max_length=255, verbose_name=_('license name'))
     license_url = models.URLField(max_length=255, blank=True, verbose_name=_('license URL'))
     source_url = models.URLField(verbose_name=_('source URL'), null=True, blank=True)
-    download_url = models.URLField(unique=True, verbose_name=_('image download URL'), null=True, blank=True)
+    download_url = models.URLField(max_length=4096, unique=True, verbose_name=_('image download URL'), null=True, blank=True)
     file = models.ImageField(
-        upload_to='cover/image', storage=OverwriteStorage(), editable=True, verbose_name=_('file'))
+        upload_to='cover/image',
+        storage=OverwriteStorage(),
+        verbose_name=_('file')
+    )
+    use_file = models.ImageField(
+        upload_to='cover/use',
+        storage=OverwriteStorage(),
+        editable=True,
+        verbose_name=_('file for use')
+    )
+
+    example = models.ImageField(
+        upload_to='cover/example',
+        storage=OverwriteStorage(),
+        editable=False,
+    )
+
+    cut_top = models.IntegerField(default=0, )
+    cut_bottom = models.IntegerField(default=0)
+    cut_left = models.IntegerField(default=0)
+    cut_right = models.IntegerField(default=0)
 
     class Meta:
         verbose_name = _('cover image')
@@ -36,12 +61,92 @@ class Image(models.Model):
     def __str__(self):
         return u"%s - %s" % (self.author, self.title)
 
+    def save(self, **kwargs):
+        super().save(**kwargs)
+        img = self.file
+        if self.cut_top or self.cut_bottom or self.cut_left or self.cut_right:
+            img = PILImage.open(img)
+            img = img.crop((
+                self.cut_left,
+                self.cut_top,
+                img.size[0] - self.cut_right,
+                img.size[1] - self.cut_bottom,
+            ))
+            buffer = BytesIO()
+            img.save(
+                buffer,
+                format='JPEG',
+            )
+            img = ContentFile(buffer.getvalue())
+        self.use_file.save(
+            "%d.jpg" % self.pk,
+            img,
+            save=False
+        )
+
+        super().save(update_fields=['use_file'])
+
+        self.example.save(
+            "%d.jpg" % self.pk,
+            ContentFile(self.build_example().get_bytes()),
+            save=False
+        )
+        super().save(update_fields=['example'])
+        
+
+    def build_example(self):
+        class A:
+            pass
+        info = A()
+        info.authors = []
+        info.translators = []
+        info.cover_class = None
+        info.cover_box_position = None
+        info.title = '?'
+        info.cover_url = 'file://' + self.use_file.path
+        return make_cover(info, width=200).output_file()
+    
     def get_absolute_url(self):
         return reverse('cover_image', args=[self.id])
 
     def get_full_url(self):
         return "http://%s%s" % (Site.objects.get_current().domain, self.get_absolute_url())
 
+    def cut_percentages(self):
+        img = PILImage.open(self.file)
+        max_w, max_h = 600, 600
+        w, h = img.size
+        scale = min(max_w / w, max_h / h)
+        ws, hs = round(w * scale), round(h * scale)
+
+        return {
+            'left': 100 * self.cut_left / w,
+            'right': 100 * self.cut_right / w,
+            'top': 100 * self.cut_top / h,
+            'bottom': 100 * self.cut_bottom / h,
+            'width': ws,
+            'height': hs,
+            'th': f'{ws}x{hs}',
+        }
+
+    @property
+    def etag(self):
+        return f'{self.cut_top}.{self.cut_bottom}.{self.cut_left}.{self.cut_right}'
+
+    @property
+    def attribution(self):
+        pieces = []
+        if self.title:
+            pieces.append(self.title)
+        if self.author:
+            pieces.append(self.author)
+        if self.license_name:
+            pieces.append(self.license_name)
+        if self.source_url:
+            pieces.append(self.source_url.split('/')[2])
+        return ', '.join(pieces)
+    
+
 
 @receiver(post_save, sender=Image)
 def download_image(sender, instance, **kwargs):