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 60f1bca..d766222 100644 (file)
--- a/src/cover/models.py
+++ b/src/cover/models.py
@@ -8,9 +8,12 @@ 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
 
 
@@ -27,7 +30,7 @@ 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(),
@@ -39,6 +42,13 @@ class Image(models.Model):
         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)
@@ -52,6 +62,7 @@ class Image(models.Model):
         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)
@@ -72,7 +83,28 @@ class Image(models.Model):
             img,
             save=False
         )
-        super().save(**kwargs)
+
+        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])
@@ -80,6 +112,41 @@ class Image(models.Model):
     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):