1.0.0 : Web Implemented.

web/database.py

@@ -0,0 +1,47 @@
+import sqlite3
+from flask import g
+from web.config import Config
+
+def get_db(db_name):
+    """
+    db_name: 'l2', 'l3', or 'web'
+    """
+    db_attr = f'db_{db_name}'
+    db = getattr(g, db_attr, None)
+    
+    if db is None:
+        if db_name == 'l2':
+            path = Config.DB_L2_PATH
+        elif db_name == 'l3':
+            path = Config.DB_L3_PATH
+        elif db_name == 'web':
+            path = Config.DB_WEB_PATH
+        else:
+            raise ValueError(f"Unknown database: {db_name}")
+            
+        # Connect with check_same_thread=False if needed for dev, but default is safer per thread
+        db = sqlite3.connect(path)
+        db.row_factory = sqlite3.Row
+        setattr(g, db_attr, db)
+        
+    return db
+
+def close_dbs(e=None):
+    for db_name in ['l2', 'l3', 'web']:
+        db_attr = f'db_{db_name}'
+        db = getattr(g, db_attr, None)
+        if db is not None:
+            db.close()
+
+def query_db(db_name, query, args=(), one=False):
+    cur = get_db(db_name).execute(query, args)
+    rv = cur.fetchall()
+    cur.close()
+    return (rv[0] if rv else None) if one else rv
+
+def execute_db(db_name, query, args=()):
+    db = get_db(db_name)
+    cur = db.execute(query, args)
+    db.commit()
+    cur.close()
+    return cur.lastrowid