cropbox image

apps/gallery/migrations/0010_auto_20200206_1944.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.2.7 on 2020-02-06 19:44
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('gallery', '0009_auto_20200206_1749'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='image',
+            name='is_public',
+            field=models.BooleanField(default=True, verbose_name='Is media source public'),
+        ),
+    ]

apps/gallery/migrations/0011_image_cropbox.py

@@ -0,0 +1,20 @@
+# Generated by Django 2.2.7 on 2020-02-08 19:00
+
+import django.core.validators
+from django.db import migrations, models
+import re
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('gallery', '0010_auto_20200206_1944'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='image',
+            name='cropbox',
+            field=models.CharField(default=None, max_length=500, null=True, validators=[django.core.validators.RegexValidator(re.compile('^\\d+(?:,\\d+)*\\Z'), code='invalid', message='Enter only digits separated by commas.')], verbose_name='x1,y1,x2,y2 crop settings'),
+        ),
+    ]

apps/gallery/models.py

@@ -1,5 +1,7 @@
 from django.db import models
 from django.utils.translation import gettext_lazy as _
+from django.core import validators
+from sorl.thumbnail import get_thumbnail
 from botocore.exceptions import ClientError
 from django.conf import settings
 from project.storage_backends import PublicMediaStorage
@@ -43,6 +45,8 @@ class Image(BaseAttributes, SORLImageMixin, PlatformMixin):
                              default=None)
     link = models.URLField(blank=True, null=True, default=None, verbose_name=_('mp4 or youtube video link'))
     order = models.PositiveIntegerField(default=0, verbose_name=_('Sorting order'))
+    cropbox = models.CharField(max_length=500, validators=[validators.validate_comma_separated_integer_list], null=True,
+                               default=None, verbose_name=_('x1,y1,x2,y2 crop settings'))
     objects = ImageQuerySet.as_manager()
 
     class Meta:
@@ -55,6 +59,16 @@ class Image(BaseAttributes, SORLImageMixin, PlatformMixin):
         """String representation"""
         return f'{self.id}'
 
+    @property
+    def image_by_cropbox(self):
+        """Returns cropped image if cropbox is set"""
+        if self.cropbox and self.image:
+            x1, y1, x2, y2 = map(int, self.cropbox.split(','))
+            return get_thumbnail(self.image,
+                                 geometry_string=f'{round(x2 - x1)}x{round(y2 - y1)}',
+                                 cropbox=self.cropbox,
+                                 quality=100)
+
     def set_pubic(self, is_public=True):
         if not settings.AWS_STORAGE_BUCKET_NAME:
             """Backend doesn't use aws s3"""

apps/gallery/serializers.py

@@ -54,6 +54,7 @@ class EstablishmentGallerySerializer(serializers.ModelSerializer):
     created_by = UserBaseSerializer(read_only=True, allow_null=True)
     image_size_in_KB = serializers.DecimalField(read_only=True, decimal_places=2, max_digits=20)
     is_main = serializers.BooleanField()
+    cropped_image = serializers.ImageField(source='image_by_cropbox', allow_null=True, read_only=True)
 
     class Meta:
         model = models.Image
@@ -69,6 +70,8 @@ class EstablishmentGallerySerializer(serializers.ModelSerializer):
             'is_main',
             'created_by',
             'image_size_in_KB',
+            'cropbox',
+            'cropped_image',
         )
         extra_kwargs = {
             'created': {'read_only': True},
@@ -80,7 +83,9 @@ class EstablishmentGallerySerializer(serializers.ModelSerializer):
 
         if image and image.size >= settings.FILE_UPLOAD_MAX_MEMORY_SIZE:
             raise serializers.ValidationError({'detail': _('File size too large: %s bytes') % image.size})
-
+        if attrs.get('cropbox'):
+            if len(attrs['cropbox'].split(',')) != 4:
+                raise serializers.ValidationError({'detail': _('Cropbox contains 4 integer values separated by comma.')})
         return attrs
 
     def create(self, validated_data):