Some refactoring, and added a script to regenerate variants

.idea/kakigoori.iml

@@ -16,7 +16,7 @@
     <content url="file://$MODULE_DIR$">
       <excludeFolder url="file://$MODULE_DIR$/env" />
     </content>
-    <orderEntry type="inheritedJdk" />
+    <orderEntry type="jdk" jdkName="Python 3.11 virtualenv at ~/kakigoori/.venv" jdkType="Python SDK" />
     <orderEntry type="sourceFolder" forTests="false" />
   </component>
   <component name="TemplatesService">

.idea/misc.xml

@@ -3,7 +3,7 @@
   <component name="Black">
     <option name="enabledOnReformat" value="true" />
     <option name="enabledOnSave" value="true" />
-    <option name="sdkName" value="Python 3.13 (kakigoori)" />
+    <option name="sdkName" value="Python 3.11 virtualenv at ~/kakigoori/.venv" />
   </component>
-  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.13 (kakigoori)" project-jdk-type="Python SDK" />
+  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.11 virtualenv at ~/kakigoori/.venv" project-jdk-type="Python SDK" />
 </project>

images/management/commands/regenerate_variants.py

@@ -0,0 +1,55 @@
+from django.core.management.base import BaseCommand
+
+from images.models import ImageVariant
+from images.utils import get_b2_resource
+
+
+class Command(BaseCommand):
+    def add_arguments(self, parser):
+        parser.add_argument("variants", nargs="+", type=str)
+
+    def handle(self, *args, **options):
+        if options["variants"] and len(options["variants"]) > 0:
+            variants = options["variants"]
+        else:
+            variants = ImageVariant.objects.all()
+
+        bucket = get_b2_resource()
+
+        for variant_id in variants:
+            print("Regenerating variant %s" % variant_id)
+
+            image_variant = ImageVariant.objects.filter(id=variant_id).first()
+
+            if image_variant.is_full_size and (
+                image_variant.file_type == "jpg" or image_variant.file_type == "png"
+            ):
+                print("Can't regenerate original image")
+                continue
+
+            if image_variant.file_type == "webp" or image_variant.file_type == "avif":
+                image_variant.regenerate = True
+                image_variant.save()
+                continue
+
+            image, file_extension = image_variant.image.create_resized_image(
+                image_variant.height,
+                image_variant.width,
+                image_variant.gaussian_blur,
+                image_variant.brightness,
+            )
+
+            if file_extension == "jpg":
+                content_type = "image/jpeg"
+            elif file_extension == "png":
+                content_type = "image/png"
+            else:
+                content_type = "binary/octet-stream"
+
+            image_variant.file_type = file_extension
+
+            bucket.upload_fileobj(
+                image,
+                image_variant.backblaze_filepath,
+                ExtraArgs={"ContentType": content_type},
+            )

images/migrations/0008_imagevariant_regenerate.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.2 on 2025-05-03 10:57
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("images", "0007_image_version_imagevariant_available_and_more"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="imagevariant",
+            name="regenerate",
+            field=models.BooleanField(default=False),
+        ),
+    ]

images/models.py

@@ -58,18 +58,7 @@ class Image(models.Model):
             available=False,
         ).save()
 
-        ImageVariant(
+    def download_original_variant(self):
-            image=variant.image,
-            height=variant.height,
-            width=variant.width,
-            is_full_size=variant.is_full_size,
-            file_type="jpegli",
-            gaussian_blur=variant.gaussian_blur,
-            brightness=variant.brightness,
-            available=False,
-        ).save()
-
-    def create_variant(self, width, height, gaussian_blur, brightness):
         bucket = get_b2_resource()
 
         original_image = BytesIO()
@@ -85,8 +74,46 @@ class Image(models.Model):
             original_image,
         )
         original_image.seek(0)
+        return original_image
 
+    def create_resized_image(
+        self,
+        height,
+        width,
+        gaussian_blur,
+        brightness,
+    ):
+        original_image = self.download_original_variant()
         resized_image = BytesIO()
+        file_extension = "jpg"
+
+        with PILImage.open(original_image) as im:
+            ImageOps.exif_transpose(im, in_place=True)
+            im = im.filter(ImageFilter.GaussianBlur(gaussian_blur))
+            enhancer = ImageEnhance.Brightness(im)
+            im = enhancer.enhance(brightness)
+            im.thumbnail(
+                (width, height), resample=PILImage.Resampling.LANCZOS, reducing_gap=3.0
+            )
+
+            if im.has_transparency_data:
+                try:
+                    im.save(resized_image, "PNG", quality=90)
+                    file_extension = "png"
+                except OSError:
+                    im.convert("RGB").save(resized_image, "JPEG", quality=90)
+            else:
+                try:
+                    im.save(resized_image, "JPEG", quality=90)
+                except OSError:
+                    im.convert("RGB").save(resized_image, "JPEG", quality=90)
+
+        resized_image.seek(0)
+
+        return resized_image, file_extension
+
+    def create_variant(self, width, height, gaussian_blur, brightness):
+        bucket = get_b2_resource()
 
         image_variant = ImageVariant(
             image=self,
@@ -99,29 +126,18 @@ class Image(models.Model):
             available=True,
         )
 
+        resized_image, file_extension = self.create_resized_image(
+            height, width, gaussian_blur, brightness
+        )
+
+        if file_extension == "jpg":
             content_type = "image/jpeg"
-
+        elif file_extension == "png":
-        with PILImage.open(original_image) as im:
-            ImageOps.exif_transpose(im, in_place=True)
-            im = im.filter(ImageFilter.GaussianBlur(gaussian_blur))
-            enhancer = ImageEnhance.Brightness(im)
-            im = enhancer.enhance(brightness)
-            im.thumbnail((width, height))
-
-            if im.has_transparency_data:
-                try:
-                    im.save(resized_image, "PNG")
-                    image_variant.file_extension = "png"
             content_type = "image/png"
-                except OSError:
-                    im.convert("RGB").save(resized_image, "JPEG")
         else:
-                try:
+            content_type = "binary/octet-stream"
-                    im.save(resized_image, "JPEG")
-                except OSError:
-                    im.convert("RGB").save(resized_image, "JPEG")
 
-        resized_image.seek(0)
+        image_variant.file_type = file_extension
 
         bucket.upload_fileobj(
             resized_image,
@@ -146,6 +162,7 @@ class ImageVariant(models.Model):
     is_full_size = models.BooleanField(default=False)
     file_type = models.CharField(max_length=10)
     available = models.BooleanField(default=False)
+    regenerate = models.BooleanField(default=False)
 
     @property
     def backblaze_filepath(self):

pyproject.toml

@@ -13,6 +13,7 @@ dependencies = [
     "charset-normalizer==3.3.2",
     "click==8.1.7",
     "django==5.2",
+    "django-stubs>=5.2.0",
     "gunicorn==23.0.0",
     "idna==3.8",
     "jmespath==1.0.1",

uv.lock

@@ -146,6 +146,35 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/63/e0/6a5b5ea350c5bd63fe94b05e4c146c18facb51229d9dee42aa39f9fc2214/Django-5.2-py3-none-any.whl", hash = "sha256:91ceed4e3a6db5aedced65e3c8f963118ea9ba753fc620831c77074e620e7d83", size = 8301361 },
 ]
 
+[[package]]
+name = "django-stubs"
+version = "5.2.0"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "asgiref" },
+    { name = "django" },
+    { name = "django-stubs-ext" },
+    { name = "types-pyyaml" },
+    { name = "typing-extensions" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/87/79/7e7ad8b4bac545c8e608fa8db0bd061977f93035a112be78a7f3ffc6ff66/django_stubs-5.2.0.tar.gz", hash = "sha256:07e25c2d3cbff5be540227ff37719cc89f215dfaaaa5eb038a75b01bbfbb2722", size = 276297 }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/9a/01/5913ba5514337f3896c7bcbff6075808184dd303cd0fc3ecc289ec7e0c96/django_stubs-5.2.0-py3-none-any.whl", hash = "sha256:cd52da033489afc1357d6245f49e3cc57bf49015877253fb8efc6722ea3d2d2b", size = 481836 },
+]
+
+[[package]]
+name = "django-stubs-ext"
+version = "5.2.0"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "django" },
+    { name = "typing-extensions" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/7c/7a/84338605817960942c1ea9d852685923ccccd0d91ba0d49532605973491f/django_stubs_ext-5.2.0.tar.gz", hash = "sha256:00c4ae307b538f5643af761a914c3f8e4e3f25f4e7c6d7098f1906c0d8f2aac9", size = 9618 }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/e2/65/9f5ca467d84a67c0c547f10b0ece9fd9c26c5efc818a01bf6a3d306c2a0c/django_stubs_ext-5.2.0-py3-none-any.whl", hash = "sha256:b27ae0aab970af4894ba4e9b3fcd3e03421dc8731516669659ee56122d148b23", size = 9066 },
+]
+
 [[package]]
 name = "gunicorn"
 version = "23.0.0"
@@ -189,6 +218,7 @@ dependencies = [
     { name = "charset-normalizer" },
     { name = "click" },
     { name = "django" },
+    { name = "django-stubs" },
     { name = "gunicorn" },
     { name = "idna" },
     { name = "jmespath" },
@@ -217,6 +247,7 @@ requires-dist = [
     { name = "charset-normalizer", specifier = "==3.3.2" },
     { name = "click", specifier = "==8.1.7" },
     { name = "django", specifier = "==5.2" },
+    { name = "django-stubs", specifier = ">=5.2.0" },
     { name = "gunicorn", specifier = "==23.0.0" },
     { name = "idna", specifier = "==3.8" },
     { name = "jmespath", specifier = "==1.0.1" },
@@ -382,6 +413,24 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/5d/a5/b2860373aa8de1e626b2bdfdd6df4355f0565b47e51f7d0c54fe70faf8fe/sqlparse-0.5.1-py3-none-any.whl", hash = "sha256:773dcbf9a5ab44a090f3441e2180efe2560220203dc2f8c0b0fa141e18b505e4", size = 44156 },
 ]
 
+[[package]]
+name = "types-pyyaml"
+version = "6.0.12.20250402"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/2d/68/609eed7402f87c9874af39d35942744e39646d1ea9011765ec87b01b2a3c/types_pyyaml-6.0.12.20250402.tar.gz", hash = "sha256:d7c13c3e6d335b6af4b0122a01ff1d270aba84ab96d1a1a1063ecba3e13ec075", size = 17282 }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/ed/56/1fe61db05685fbb512c07ea9323f06ea727125951f1eb4dff110b3311da3/types_pyyaml-6.0.12.20250402-py3-none-any.whl", hash = "sha256:652348fa9e7a203d4b0d21066dfb00760d3cbd5a15ebb7cf8d33c88a49546681", size = 20329 },
+]
+
+[[package]]
+name = "typing-extensions"
+version = "4.13.2"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/f6/37/23083fcd6e35492953e8d2aaaa68b860eb422b34627b13f2ce3eb6106061/typing_extensions-4.13.2.tar.gz", hash = "sha256:e6c81219bd689f51865d9e372991c540bda33a0379d5573cddb9a3a23f7caaef", size = 106967 }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/8b/54/b1ae86c0973cc6f0210b53d508ca3641fb6d0c56823f288d108bc7ab3cc8/typing_extensions-4.13.2-py3-none-any.whl", hash = "sha256:a439e7c04b49fec3e5d3e2beaa21755cadbbdc391694e28ccdd36ca4a1408f8c", size = 45806 },
+]
+
 [[package]]
 name = "tzdata"
 version = "2025.2"