V1.0.0.2 - Refactor: Split DB and Import logic, fixed CSV upload columns

db.py

@@ -0,0 +1,26 @@
+import sqlite3
+from flask import current_app, g
+
+def get_db():
+    """Get database connection"""
+    # Use current_app.config to access settings from any module
+    conn = sqlite3.connect(current_app.config['DATABASE'])
+    conn.row_factory = sqlite3.Row
+    return conn
+
+def query_db(query, args=(), one=False):
+    """Query database helper"""
+    conn = get_db()
+    cursor = conn.execute(query, args)
+    rv = cursor.fetchall()
+    conn.close()
+    return (rv[0] if rv else None) if one else rv
+
+def execute_db(query, args=()):
+    """Execute database insert/update/delete"""
+    conn = get_db()
+    cursor = conn.execute(query, args)
+    conn.commit()
+    last_id = cursor.lastrowid
+    conn.close()
+    return last_id