feat: integrate last30days and daily-news-report skills

skills/last30days/scripts/lib/cache.py

@@ -0,0 +1,152 @@
+"""Caching utilities for last30days skill."""
+
+import hashlib
+import json
+import os
+from datetime import datetime, timezone
+from pathlib import Path
+from typing import Any, Optional
+
+CACHE_DIR = Path.home() / ".cache" / "last30days"
+DEFAULT_TTL_HOURS = 24
+MODEL_CACHE_TTL_DAYS = 7
+
+
+def ensure_cache_dir():
+    """Ensure cache directory exists."""
+    CACHE_DIR.mkdir(parents=True, exist_ok=True)
+
+
+def get_cache_key(topic: str, from_date: str, to_date: str, sources: str) -> str:
+    """Generate a cache key from query parameters."""
+    key_data = f"{topic}|{from_date}|{to_date}|{sources}"
+    return hashlib.sha256(key_data.encode()).hexdigest()[:16]
+
+
+def get_cache_path(cache_key: str) -> Path:
+    """Get path to cache file."""
+    return CACHE_DIR / f"{cache_key}.json"
+
+
+def is_cache_valid(cache_path: Path, ttl_hours: int = DEFAULT_TTL_HOURS) -> bool:
+    """Check if cache file exists and is within TTL."""
+    if not cache_path.exists():
+        return False
+
+    try:
+        stat = cache_path.stat()
+        mtime = datetime.fromtimestamp(stat.st_mtime, tz=timezone.utc)
+        now = datetime.now(timezone.utc)
+        age_hours = (now - mtime).total_seconds() / 3600
+        return age_hours < ttl_hours
+    except OSError:
+        return False
+
+
+def load_cache(cache_key: str, ttl_hours: int = DEFAULT_TTL_HOURS) -> Optional[dict]:
+    """Load data from cache if valid."""
+    cache_path = get_cache_path(cache_key)
+
+    if not is_cache_valid(cache_path, ttl_hours):
+        return None
+
+    try:
+        with open(cache_path, 'r') as f:
+            return json.load(f)
+    except (json.JSONDecodeError, OSError):
+        return None
+
+
+def get_cache_age_hours(cache_path: Path) -> Optional[float]:
+    """Get age of cache file in hours."""
+    if not cache_path.exists():
+        return None
+    try:
+        stat = cache_path.stat()
+        mtime = datetime.fromtimestamp(stat.st_mtime, tz=timezone.utc)
+        now = datetime.now(timezone.utc)
+        return (now - mtime).total_seconds() / 3600
+    except OSError:
+        return None
+
+
+def load_cache_with_age(cache_key: str, ttl_hours: int = DEFAULT_TTL_HOURS) -> tuple:
+    """Load data from cache with age info.
+
+    Returns:
+        Tuple of (data, age_hours) or (None, None) if invalid
+    """
+    cache_path = get_cache_path(cache_key)
+
+    if not is_cache_valid(cache_path, ttl_hours):
+        return None, None
+
+    age = get_cache_age_hours(cache_path)
+
+    try:
+        with open(cache_path, 'r') as f:
+            return json.load(f), age
+    except (json.JSONDecodeError, OSError):
+        return None, None
+
+
+def save_cache(cache_key: str, data: dict):
+    """Save data to cache."""
+    ensure_cache_dir()
+    cache_path = get_cache_path(cache_key)
+
+    try:
+        with open(cache_path, 'w') as f:
+            json.dump(data, f)
+    except OSError:
+        pass  # Silently fail on cache write errors
+
+
+def clear_cache():
+    """Clear all cache files."""
+    if CACHE_DIR.exists():
+        for f in CACHE_DIR.glob("*.json"):
+            try:
+                f.unlink()
+            except OSError:
+                pass
+
+
+# Model selection cache (longer TTL)
+MODEL_CACHE_FILE = CACHE_DIR / "model_selection.json"
+
+
+def load_model_cache() -> dict:
+    """Load model selection cache."""
+    if not is_cache_valid(MODEL_CACHE_FILE, MODEL_CACHE_TTL_DAYS * 24):
+        return {}
+
+    try:
+        with open(MODEL_CACHE_FILE, 'r') as f:
+            return json.load(f)
+    except (json.JSONDecodeError, OSError):
+        return {}
+
+
+def save_model_cache(data: dict):
+    """Save model selection cache."""
+    ensure_cache_dir()
+    try:
+        with open(MODEL_CACHE_FILE, 'w') as f:
+            json.dump(data, f)
+    except OSError:
+        pass
+
+
+def get_cached_model(provider: str) -> Optional[str]:
+    """Get cached model selection for a provider."""
+    cache = load_model_cache()
+    return cache.get(provider)
+
+
+def set_cached_model(provider: str, model: str):
+    """Cache model selection for a provider."""
+    cache = load_model_cache()
+    cache[provider] = model
+    cache['updated_at'] = datetime.now(timezone.utc).isoformat()
+    save_model_cache(cache)