app/analyzers/opinionfact.py

"""
Opinion vs Fact classifier.
Klasifikasi apakah artikel bersifat opini/editorial atau berita faktual.
"""
from typing import List, Dict
import re

OPINION_MARKERS = [
    "menurut saya", "saya rasa", "seharusnya", "sebaiknya", "idealnya",
    "opini", "editorial", "kolom", "perspektif", "pandangan",
    "hemat saya", "saya pikir", "kita harus", "perlu diakui",
    "jelas bahwa", "tidak bisa dipungkiri", "menariknya",
]

FACT_MARKERS = [
    "berdasarkan data", "menurut", "kata", "ujar", "ungkap",
    "dilaporkan", "tercatat", "statistik", "survei", "rilis",
    "laporan", "konferensi pers", "siaran pers", "resmi",
    "diumumkan", "ditetapkan", "diresmikan",
]

SUBJECTIVE_WORDS = [
    "terbaik", "terburuk", "luar biasa", "mengecewakan", "menyedihkan",
    "mengesankan", "fantastis", "mengerikan", "sempurna", "parah",
    "indah", "jelek", "hebat", "bodoh", "cerdas",
]


def classify(text: str) -> Dict:
    text_lower = text.lower()

    opinion_hits = sum(1 for m in OPINION_MARKERS if m in text_lower)
    fact_hits = sum(1 for m in FACT_MARKERS if m in text_lower)
    subjective_hits = sum(1 for w in SUBJECTIVE_WORDS if w in text_lower)

    opinion_score = opinion_hits * 3 + subjective_hits * 2
    fact_score = fact_hits * 3

    total = opinion_score + fact_score
    if total == 0:
        return {"classification": "unknown", "opinion_pct": 50, "fact_pct": 50, "confidence": 0}

    opinion_pct = round((opinion_score / total) * 100)
    fact_pct = 100 - opinion_pct

    if opinion_pct > 60:
        classification = "opinion"
    elif fact_pct > 60:
        classification = "fact"
    else:
        classification = "mixed"

    confidence = round(abs(opinion_pct - 50) / 50, 2)

    return {
        "classification": classification,
        "opinion_pct": opinion_pct,
        "fact_pct": fact_pct,
        "confidence": confidence,
    }


def analyze_batch(items: List) -> List[Dict]:
    results = []
    for item in items:
        result = classify(item.text)
        results.append({"id": item.id, **result})
    return results