contao-leaflet-maps/runonce/migrate.php

<?php

/**
 * @package    dev
 * @author     David Molineus <david.molineus@netzmacht.de>
 * @copyright  2014 netzmacht creative David Molineus
 * @license    LGPL 3.0
 * @filesource
 *
 */

namespace Netzmacht\Contao\Leaflet\runonce;

/**
 * Migrate controller.
 *
 * @package Netzmacht\Contao\Leaflet\runonce
 */
class migrate
{
    /**
     * Execute the migration.
     *
     * @return void
     */
    public function execute()
    {
        $database = \Database::getInstance();

        if ($database->fieldExists('coordinates', 'tl_leaflet_marker')) {
            $this->createFields($database);
            $this->convertCoordinates($database);
        }
    }

    /**
     * @param $database
     *
     * @param \Database $database The database connection.
     *
     * @return array
     */
    protected function createFields(\Database $database)
    {
        if (!$database->fieldExists('latitude', 'tl_leaflet_marker')) {
            $database->execute('ALTER TABLE tl_leaflet_marker ADD latitude DECIMAL (10, 8) NULL;');
        }

        if (!$database->fieldExists('longitude', 'tl_leaflet_marker')) {
            $database->execute('ALTER TABLE tl_leaflet_marker ADD longitude DECIMAL (11, 8)  NULL;');
        }

        if (!$database->fieldExists('altitude', 'tl_leaflet_marker')) {
            $database->execute('ALTER TABLE tl_leaflet_marker ADD altitude float NULL;');
        }
    }

    /**
     * Convert coordinates to new splitted fields.
     *
     * @param \Database $database The database connection.
     *
     * @return void
     */
    private function convertCoordinates(\Database $database)
    {
        $query = <<<SQL
SELECT id,coordinates
FROM   tl_leaflet_marker
WHERE  coordinates <> '' AND latitude IS NULL aND longitude IS NULL AND altitude IS NULL
SQL;

        $result = $database->query($query);

        while ($result->next()) {
            list($latitude, $longitude, $altitude) = trimsplit(',', $result->coordinates);

            $database
                ->prepare('UPDATE tl_leaflet_marker %s WHERE id=?')
                ->set(
                    array(
                        'latitude'  => $latitude,
                        'longitude' => $longitude,
                        'altitude'  => $altitude
                    )
                )
                ->execute($result->id);
        }
    }
}

$controller = new migrate();
$controller->execute();