<?php

namespace SlimStat\Dependencies\MatthiasMullie\Scrapbook\Adapters;

/**
 * SQLite adapter. Basically just a wrapper over \PDO, but in an exchangeable
 * (KeyValueStore) interface.
 *
 * @author Matthias Mullie <scrapbook@mullie.eu>
 * @copyright Copyright (c) 2014, Matthias Mullie. All rights reserved
 * @license LICENSE MIT
 */
class SQLite extends MySQL
{
    /**
     * {@inheritdoc}
     */
    public function setMulti(array $items, $expire = 0)
    {
        if (empty($items)) {
            return array();
        }
        $expire = $this->expire($expire);
        $this->clearExpired();
        // SQLite < 3.7.11 doesn't support multi-insert/replace!
        $statement = $this->client->prepare("REPLACE INTO {$this->table} (k, v, e)\n            VALUES (:key, :value, :expire)");
        $success = array();
        foreach ($items as $key => $value) {
            $value = $this->serialize($value);
            $statement->execute(array(':key' => $key, ':value' => $value, ':expire' => $expire));
            $success[$key] = (bool) $statement->rowCount();
        }
        return $success;
    }
    /**
     * {@inheritdoc}
     */
    public function add($key, $value, $expire = 0)
    {
        $value = $this->serialize($value);
        $expire = $this->expire($expire);
        $this->clearExpired();
        // SQLite-specific way to ignore insert-on-duplicate errors
        $statement = $this->client->prepare("INSERT OR IGNORE INTO {$this->table} (k, v, e)\n            VALUES (:key, :value, :expire)");
        $statement->execute(array(':key' => $key, ':value' => $value, ':expire' => $expire));
        return 1 === $statement->rowCount();
    }
    /**
     * {@inheritdoc}
     */
    public function flush()
    {
        return false !== $this->client->exec("DELETE FROM {$this->table}");
    }
    /**
     * {@inheritdoc}
     */
    protected function init()
    {
        $this->client->exec("CREATE TABLE IF NOT EXISTS {$this->table} (\n                k VARCHAR(255) NOT NULL PRIMARY KEY,\n                v BLOB,\n                e TIMESTAMP NULL DEFAULT NULL,\n                KEY e\n            )");
    }
}