HCI-তে ডিজাইন এথিক্স ও ডার্ক প্যাটার্ন

def detect_roach_motel(text):
    text_l = text.lower()
    has_cancel_mention = "cancel" in text_l
    friction_phrases = [
        "call our support line",
        "speak to a retention agent",
        "must call",
        "during business hours",
    ]
    has_friction = any(p in text_l for p in friction_phrases)
    return has_cancel_mention and has_friction

def detect_sneak_into_basket(text):
    text_l = text.lower()
    added_phrases = ["we've added", "has been added to your cart", "automatically added"]
    extra_item_words = ["protection", "insurance", "warranty", "priority shipping"]
    has_added = any(p in text_l for p in added_phrases)
    has_extra = any(w in text_l for w in extra_item_words)
    return has_added and has_extra

def detect_privacy_zuckering(text):
    text_l = text.lower()
    negation_markers = ["not", "don't", "uncheck", "opt out"]
    negation_count = sum(text_l.count(m) for m in negation_markers)
    return negation_count >= 3   # একাধিক নেগেশন একসাথে থাকলে ভাষা সন্দেহজনকভাবে জটিল

def detect_forced_continuity(text):
    text_l = text.lower()
    free_offer_phrases = ["get a free", "free trial", "free premium"]
    auto_convert_phrases = ["converts to", "automatically charged", "will be billed"]
    has_free_offer = any(p in text_l for p in free_offer_phrases)
    has_auto_convert = any(p in text_l for p in auto_convert_phrases)
    return has_free_offer and has_auto_convert

def scan(text):
    return {
        "roach_motel": detect_roach_motel(text),
        "sneak_into_basket": detect_sneak_into_basket(text),
        "privacy_zuckering": detect_privacy_zuckering(text),
        "forced_continuity": detect_forced_continuity(text),
    }

samples = [
    "Sign up in 10 seconds! To cancel, you must call our support line and speak to a retention agent.",
    "Your cart total is $49.99. We've added Priority Shipping Protection ($4.99) to help protect your order.",
    "Uncheck this box if you do not want to opt out of not sharing your data with our partners.",
    "Get a FREE premium subscription! *Terms: the free trial automatically converts to a $19.99/month plan unless cancelled before the trial ends.",
    "You can review your order summary before it ships, and cancel anytime from your account page.",
    "Get a FREE trial today! To cancel your subscription, you must call our support line and speak to a retention agent before your free trial converts to $29.99/month.",
]

for i, text in enumerate(samples, start=1):
    result = scan(text)
    flags = [name for name, hit in result.items() if hit]
    verdict = ", ".join(flags) if flags else "no pattern detected (clean)"
    print(f"Sample {i}: {text}")
    print(f"  -> {verdict}")

total_flagged = sum(1 for text in samples if any(scan(text).values()))
print()
print(f"{total_flagged} out of {len(samples)} samples flagged with at least one dark-pattern signal.")