first commit

core/utils/Permission.py

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+from rest_framework.permissions import BasePermission, SAFE_METHODS
+
+class ReadOnly(BasePermission):
+    """
+    Yalnızca okuma işlemlerine izin verir.
+    """
+    def has_permission(self, request, view):
+        # SAFE_METHODS: ('GET', 'HEAD', 'OPTIONS')
+        return request.method in SAFE_METHODS

core/utils/utils.py

@@ -0,0 +1,40 @@
+import os
+import uuid
+from django.utils.deconstruct import deconstructible
+from imagekit.processors import ResizeToFill
+
+
+class ConvertToRGBA(object):
+    """Converts an image to RGBA mode."""
+    def process(self, img):
+        if img.mode not in ('RGBA', 'LA'):
+            img = img.convert('RGBA')
+        return img
+
+
+@deconstructible
+class UniquePathAndRename(object):
+    def __init__(self, upload_to):
+        self.upload_to = upload_to
+
+    def __call__(self, instance, filename):
+        ext = filename.split('.')[-1]
+        new_filename = f"{uuid.uuid4().hex}.{ext}"
+        return os.path.join(self.upload_to, new_filename)
+
+
+def image_optimizer(upload_to, width, height, quality, img_format):
+    """
+    ProcessedImageField için gerekli olan `upload_to`, `processors`, `format`
+    ve `options` parametrelerini dinamik olarak oluşturur.
+    """
+    processors = [ResizeToFill(width, height)]
+    if img_format == 'PNG':
+        processors.insert(0, ConvertToRGBA())
+
+    return {
+        'upload_to': UniquePathAndRename(upload_to),
+        'processors': processors,
+        'format': img_format,
+        'options': {'quality': quality}
+    }