updated costco

app/readers/costco_ca.py

@@ -2,15 +2,35 @@
 import httpx
 import re
 from .__agents import agents
+import base64
 
 SITE = "www.costco.ca"
 
+def is_base64(s: str) -> bool:
+    try:
+        return base64.b64encode(base64.b64decode(s)) == s.encode('utf-8')
+    except Exception:
+        return False
+
+def extract_using_pattern(html: str, pattern: str) -> float | None:
+    matches = re.findall(pattern, html)
+    if len(matches) == 0:
+        return None
+    if is_base64(matches[0]):
+        matches[0] = base64.b64decode(matches[0]).decode("utf-8")
+    return float(matches[0].strip().strip("$").strip())
 
 def get_price(url: str, client: httpx.Client) -> float:
     agent = random.choice(agents)
     r = client.get(url, headers={"user-agent": agent}, timeout=5)
     html = r.text
-    pattern = r"priceMin: '(\d+\.\d+)'"
-    matches = re.findall(pattern, html)
-    price = matches[0]
-    return float(price.strip().strip("$").strip())
+    patterns = [
+        r"priceMin: '(\d+\.\d+)'",
+        r"price: (\d+\.\d+)",
+        r"price: '([A-Za-z0-9+/=]+)'"
+    ]
+    for pattern in patterns:
+        price = extract_using_pattern(html, pattern)
+        if price is not None:
+            return price
+    raise Exception("Price not found")