Adds graphical captcha prototype (#124)

* adds kinda graphical captcha

* black

* Update Pipfile

* Don't require 3.8.

Co-authored-by: infra <infra@sterile.solutions>

captcha/Pipfile

@@ -0,0 +1,13 @@
+[[source]]
+url = "https://pypi.python.org/simple"
+verify_ssl = true
+name = "pypi"
+
+[packages]
+pillow = "*"
+num2words = "*"
+
+[dev-packages]
+
+[requires]
+python_version = "3.9"

captcha/__init__.py

@@ -0,0 +1,41 @@
+import random
+import tempfile
+
+from typing import Tuple
+
+import num2words
+
+from PIL import Image
+from PIL import ImageDraw
+from PIL import ImageFont
+
+
+def get_challenge_and_answer() -> Tuple[str, int]:
+    first = random.randint(0, 30)
+    second = random.randint(0, 30)
+    answer = first + second
+    first = num2words.num2words(first)
+    second = num2words.num2words(second)
+    # Open an Image
+    img = Image.open(f"captcha/captcha{random.randint(1,4)}.webp")
+
+    # Call draw Method to add 2D graphics in an image
+    I1 = ImageDraw.Draw(img)
+
+    myFont = ImageFont.truetype("FreeMono.ttf", 65)
+    # Add Text to an image
+    I1.text(
+        (80, 80), f"What's {first}\nplus {second}?", font=myFont, fill=(255, 255, 255)
+    )
+
+    temp_file = tempfile.NamedTemporaryFile(
+        prefix="rendered", suffix=".webp", delete=False
+    )
+
+    # Save the edited image
+    img.save(temp_file)
+    return temp_file.name, answer
+
+
+if __name__ == "__main__":
+    print(get_challenge_and_answer())