add migration script for old aliases

migration/v01.16.00-aliases.py

@@ -0,0 +1,26 @@
+# Used to migrate aliases from prior to v1.16.0
+# usage: $ python3 migration/v01.16.00-aliases.py ~/.bitbot/bot.db
+
+import argparse
+parser = argparse.ArgumentParser(description="Migrate pre-v1.16.0 aliases")
+parser.add_argument("database")
+args = parser.parse_args()
+
+import json, sqlite3
+database = sqlite3.connect(args.database)
+
+cursor = database.cursor()
+cursor.execute(
+    """SELECT server_id, value FROM server_settings
+       WHERE setting='command-aliases'""")
+results = cursor.fetchall()
+print(results)
+
+for server_id, value in results:
+    aliases = json.loads(value)
+    for alias, command in aliases.items():
+        print(server_id, alias, command)
+        cursor.execute("INSERT INTO server_settings VALUES (?, ?, ?)",
+            [server_id, "alias-%s" % alias, json.dumps(command)])
+database.commit()
+database.close()