Converts protection database from the feature/811-uuid-conversion branch back to master.

lwc_convert_old_experimental_uuid.py

import MySQLdb
import json

conn = MySQLdb.connect(host = "127.0.0.1", user = "root", passwd = "", db = "lwc")

"""

Protections:

RENAME TABLE lwc_protections TO lwc_protections_old_uuid;

CREATE TABLE `lwc_protections` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `owner` varchar(255) DEFAULT NULL,
  `type` int(11) DEFAULT NULL,
  `x` int(11) DEFAULT NULL,
  `y` int(11) DEFAULT NULL,
  `z` int(11) DEFAULT NULL,
  `data` text,
  `blockId` int(11) DEFAULT NULL,
  `world` varchar(255) DEFAULT NULL,
  `password` varchar(255) DEFAULT NULL,
  `date` varchar(255) DEFAULT NULL,
  `last_accessed` int(11) DEFAULT NULL,
  PRIMARY KEY (`id`),
  KEY `protections_main` (`x`,`y`,`z`,`world`),
  KEY `protections_utility` (`owner`),
  KEY `protections_type` (`type`)
) ENGINE=MyISAM AUTO_INCREMENT=125385 DEFAULT CHARSET=latin1;

"""

cursor = conn.cursor()

### Load players
players = {} # intId => id (uuid || username)

cursor.execute("SELECT * FROM lwc_players")

for row in cursor.fetchall():
    id = row[0]
    uuid = row[1]
    username = row[2]

    players[id] = uuid or username
    print "%d => %s" % (id, players[id])

### Convert protections

cursor.execute("SELECT COUNT(*) from lwc_protections_old_uuid")

total = cursor.fetchone()[0]

pos = 0
limit = 100

while True:
    cursor.execute("SELECT * FROM lwc_protections_old_uuid LIMIT %s, %s", (pos, limit))

    if cursor.rowcount == 0:
        break

    pos += cursor.rowcount

    print 'Loaded %d/%d rows (%.2f%%)' % (pos, total, float(pos) / total * 100)

    for row in cursor.fetchall():
        id = row[0]
        owner = row[1] # needs conversion
        type = row[2]
        x = row[3]
        y = row[4]
        z = row[5]
        # flags = row[6] # some dbs have this, but can be discarded (junk)
        data = row[6] # data.rights needs conversion
        blockId = row[7]
        world = row[8]
        password = row[9]
        date = row[10]
        last_accessed = row[11]

        # convert data
        try:
            data_json = json.loads(data)

            if 'rights' in data_json:
                for right in data_json['rights']:
                    if right['type'] == 1: # Player
                        right['name'] = players[int(right['name'])]
        except TypeError:
            data_json = "{}"

        converted_owner = players[owner]
        converted_data = json.dumps(data_json)

        query = """
            INSERT INTO lwc_protections
            (id, owner, type, x, y, z, data, blockId, world, password, date, last_accessed)
            VALUES
            (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s)
        """
        cursor.execute(query, [id, converted_owner, type, x, y, z, converted_data, blockId, world, password, date, last_accessed])