Moved the current files to pivate repo

application/app_components/cache_manager.py

@@ -0,0 +1,185 @@
+"""
+Cache Manager for Work Items and UUF Items
+Stores fetched items in temporary cache to avoid reloading on every app start
+"""
+
+import json
+import os
+import tempfile
+import time
+from pathlib import Path
+from typing import List, Dict, Any, Optional
+from hashlib import md5
+
+
+class CacheManager:
+    """Manages caching of work items and UUF items"""
+
+    def __init__(self, cache_duration_hours: int = 24):
+        """
+        Initialize cache manager
+
+        Args:
+            cache_duration_hours: How long cache is valid (default 24 hours)
+        """
+        self.cache_duration_seconds = cache_duration_hours * 3600
+        self.cache_dir = Path(tempfile.gettempdir()) / "devops_to_github_cache"
+        self.cache_dir.mkdir(exist_ok=True)
+
+    def _get_cache_key(self, source_type: str, identifier: str) -> str:
+        """Generate cache key from source type and identifier"""
+        # Use MD5 hash to create safe filename
+        key_str = f"{source_type}_{identifier}"
+        return md5(key_str.encode()).hexdigest()
+
+    def _get_cache_path(self, cache_key: str) -> Path:
+        """Get full path to cache file"""
+        return self.cache_dir / f"{cache_key}.json"
+
+    def is_cache_valid(self, source_type: str, identifier: str) -> bool:
+        """Check if cache exists and is still valid"""
+        cache_key = self._get_cache_key(source_type, identifier)
+        cache_path = self._get_cache_path(cache_key)
+
+        if not cache_path.exists():
+            return False
+
+        # Check if cache has expired
+        file_age = time.time() - cache_path.stat().st_mtime
+        return file_age < self.cache_duration_seconds
+
+    def load_from_cache(self, source_type: str, identifier: str) -> Optional[List[Dict[str, Any]]]:
+        """
+        Load work items from cache
+
+        Args:
+            source_type: 'azure_devops' or 'uuf'
+            identifier: query URL hash or config hash
+
+        Returns:
+            List of work items if cache is valid, None otherwise
+        """
+        if not self.is_cache_valid(source_type, identifier):
+            return None
+
+        cache_key = self._get_cache_key(source_type, identifier)
+        cache_path = self._get_cache_path(cache_key)
+
+        try:
+            with open(cache_path, 'r', encoding='utf-8') as f:
+                cache_data = json.load(f)
+
+            # Validate cache structure
+            if 'timestamp' not in cache_data or 'items' not in cache_data:
+                return None
+
+            return cache_data['items']
+
+        except Exception as e:
+            print(f"Error loading cache: {e}")
+            return None
+
+    def save_to_cache(self, source_type: str, identifier: str, items: List[Dict[str, Any]]) -> bool:
+        """
+        Save work items to cache
+
+        Args:
+            source_type: 'azure_devops' or 'uuf'
+            identifier: query URL hash or config hash
+            items: List of work items to cache
+
+        Returns:
+            True if successful, False otherwise
+        """
+        cache_key = self._get_cache_key(source_type, identifier)
+        cache_path = self._get_cache_path(cache_key)
+
+        try:
+            cache_data = {
+                'timestamp': time.time(),
+                'source_type': source_type,
+                'identifier': identifier,
+                'items': items
+            }
+
+            with open(cache_path, 'w', encoding='utf-8') as f:
+                json.dump(cache_data, f, indent=2, ensure_ascii=False)
+
+            return True
+
+        except Exception as e:
+            print(f"Error saving cache: {e}")
+            return False
+
+    def invalidate_cache(self, source_type: str = None, identifier: str = None):
+        """
+        Invalidate (delete) cache
+
+        Args:
+            source_type: If specified, only invalidate this source type
+            identifier: If specified, only invalidate this specific cache
+        """
+        if source_type and identifier:
+            # Invalidate specific cache
+            cache_key = self._get_cache_key(source_type, identifier)
+            cache_path = self._get_cache_path(cache_key)
+            if cache_path.exists():
+                cache_path.unlink()
+        elif source_type:
+            # Invalidate all caches for this source type
+            for cache_file in self.cache_dir.glob("*.json"):
+                try:
+                    with open(cache_file, 'r', encoding='utf-8') as f:
+                        cache_data = json.load(f)
+                    if cache_data.get('source_type') == source_type:
+                        cache_file.unlink()
+                except:
+                    pass
+        else:
+            # Invalidate all caches
+            for cache_file in self.cache_dir.glob("*.json"):
+                cache_file.unlink()
+
+    def get_cache_info(self) -> Dict[str, Any]:
+        """Get information about cached items"""
+        cache_files = list(self.cache_dir.glob("*.json"))
+
+        info = {
+            'cache_dir': str(self.cache_dir),
+            'total_files': len(cache_files),
+            'total_size_bytes': sum(f.stat().st_size for f in cache_files),
+            'caches': []
+        }
+
+        for cache_file in cache_files:
+            try:
+                with open(cache_file, 'r', encoding='utf-8') as f:
+                    cache_data = json.load(f)
+
+                file_age = time.time() - cache_file.stat().st_mtime
+                is_valid = file_age < self.cache_duration_seconds
+
+                info['caches'].append({
+                    'source_type': cache_data.get('source_type', 'unknown'),
+                    'item_count': len(cache_data.get('items', [])),
+                    'age_hours': round(file_age / 3600, 1),
+                    'is_valid': is_valid,
+                    'size_kb': round(cache_file.stat().st_size / 1024, 1)
+                })
+            except:
+                pass
+
+        return info
+
+    def cleanup_expired(self):
+        """Remove expired cache files"""
+        current_time = time.time()
+        removed_count = 0
+
+        for cache_file in self.cache_dir.glob("*.json"):
+            file_age = current_time - cache_file.stat().st_mtime
+            if file_age >= self.cache_duration_seconds:
+                cache_file.unlink()
+                removed_count += 1
+
+        return removed_count