Merge pull request '490_View_refactoring_II' (#520) from 490_View_refactoring_II into master

Reviewed-on: #520

konova/utils/generators.py

@@ -42,23 +42,24 @@ def generate_random_string(length: int, use_numbers: bool = False, use_letters_l
     ret_val = "".join(random.choice(elements) for i in range(length))
     return ret_val
 
+class IdentifierGenerator:
+    _MODEL = None
 
-def generate_qr_code(content: str, size: int = 20) -> str:
-    """ Generates a qr code from given content
+    def __init__(self, model):
+        from konova.models import BaseObject
+        if not issubclass(model, BaseObject):
+            raise AssertionError("Model must be a subclass of BaseObject!")
 
-    Args:
-        content (str): The content for the qr code
-        size (int): The image size
+        self._MODEL = model
 
-    Returns:
-        qrcode_svg (str): The qr code as svg
-    """
-    qrcode_factory = qrcode.image.svg.SvgImage
-    qrcode_img = qrcode.make(
-        content,
-        image_factory=qrcode_factory,
-        box_size=size
-    )
-    stream = BytesIO()
-    qrcode_img.save(stream)
-    return stream.getvalue().decode()
+    def generate_id(self) -> str:
+        """ Generates a unique identifier
+
+        Returns:
+
+        """
+        unpersisted_object = self._MODEL()
+        identifier = unpersisted_object.generate_new_identifier()
+        while self._MODEL.objects.filter(identifier=identifier).exists():
+            identifier = unpersisted_object.generate_new_identifier()
+        return identifier

konova/utils/qrcode.py

@@ -0,0 +1,47 @@
+"""
+Author: Michel Peltriaux
+Created on: 14.12.25
+
+"""
+from io import BytesIO
+
+import qrcode
+import qrcode.image.svg as svg
+
+
+class QrCode:
+    """ A wrapping class for creating a qr code with content
+
+    """
+    _content = None
+    _img = None
+
+    def __init__(self, content: str, size: int):
+        self._content = content
+        self._img = self._generate_qr_code(content, size)
+
+    def _generate_qr_code(self, content: str, size: int = 20) -> str:
+        """ Generates a qr code from given content
+
+        Args:
+            content (str): The content for the qr code
+            size (int): The image size
+
+        Returns:
+            qrcode_svg (str): The qr code as svg
+        """
+        img_factory = svg.SvgImage
+        qrcode_img = qrcode.make(
+            content,
+            image_factory=img_factory,
+            box_size=size
+        )
+        stream = BytesIO()
+        qrcode_img.save(stream)
+        return stream.getvalue().decode()
+
+    def get_img(self):
+        return self._img
+
+    def get_content(self):
+        return self._content