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from django.http import HttpResponse
import os
import random
from collections import deque
import threading
class ImageRotator:
def __init__(self):
self.image_queues = {}
self.lock = threading.Lock()
def get_random_image(self, style):
with self.lock:
# Initialize or refresh queue if empty
if style not in self.image_queues or not self.image_queues[style]:
path = f"static/images/fakeads/{style}"
files = [f for f in os.listdir(path) if f.endswith(".gif")]
random.shuffle(files)
self.image_queues[style] = deque(files)
# Get next image and rotate to end of queue
image = self.image_queues[style].popleft()
self.image_queues[style].append(image)
return image
rotator = ImageRotator()
def new_pamphlet(request):
"""Main view function to serve pamphlets."""
style = request.GET.get("style", "banner")
seed = request.GET.get("seed", "")
if style not in ["banner", "big", "button"]:
style = "banner"
if style == "button":
style = "buttons" # One-off correction for migration of folder
path = f"static/images/fakeads/{style}"
try:
files = [f for f in os.listdir(path) if f.endswith(".gif")]
if not files:
return HttpResponse(status=404)
random.seed(seed)
chosen_file = random.choice(files)
random.seed()
file_path = os.path.join(path, chosen_file)
with open(file_path, "rb") as f:
response = HttpResponse(f.read(), content_type="image/gif")
response["Cache-Control"] = "no-cache, no-store, must-revalidate"
response["Pragma"] = "no-cache"
response["Expires"] = "0"
return response
except Exception as e:
print(f"Error while serving pamphlet: {str(e)}")
return HttpResponse(status=404)
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