100 lines
2.5 KiB
PHP
100 lines
2.5 KiB
PHP
<?php
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/**
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* Cache based on SQLite 3 <https://www.sqlite.org>
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*/
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class SQLiteCache implements CacheInterface {
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protected $path;
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protected $param;
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private $db = null;
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public function __construct() {
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if (!extension_loaded('sqlite3'))
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die('"sqlite3" extension not loaded. Please check "php.ini"');
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$file = PATH_CACHE . 'cache.sqlite';
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if (!is_file($file)) {
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$this->db = new SQLite3($file);
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$this->db->enableExceptions(true);
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$this->db->exec("CREATE TABLE storage ('key' BLOB PRIMARY KEY, 'value' BLOB, 'updated' INTEGER)");
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} else {
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$this->db = new SQLite3($file);
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$this->db->enableExceptions(true);
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}
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$this->db->busyTimeout(5000);
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}
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public function loadData(){
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$Qselect = $this->db->prepare('SELECT value FROM storage WHERE key = :key');
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$Qselect->bindValue(':key', $this->getCacheKey());
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$result = $Qselect->execute();
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if ($result instanceof SQLite3Result) {
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$data = $result->fetchArray(SQLITE3_ASSOC);
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if (isset($data['value'])) {
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return unserialize($data['value']);
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}
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}
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return null;
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}
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public function saveData($datas){
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$Qupdate = $this->db->prepare('INSERT OR REPLACE INTO storage (key, value, updated) VALUES (:key, :value, :updated)');
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$Qupdate->bindValue(':key', $this->getCacheKey());
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$Qupdate->bindValue(':value', serialize($datas));
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$Qupdate->bindValue(':updated', time());
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$Qupdate->execute();
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return $this;
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}
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public function getTime(){
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$Qselect = $this->db->prepare('SELECT updated FROM storage WHERE key = :key');
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$Qselect->bindValue(':key', $this->getCacheKey());
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$result = $Qselect->execute();
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if ($result instanceof SQLite3Result) {
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$data = $result->fetchArray(SQLITE3_ASSOC);
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if (isset($data['updated'])) {
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return $data['updated'];
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}
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}
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return false;
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}
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public function purgeCache($duration){
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$Qdelete = $this->db->prepare('DELETE FROM storage WHERE updated < :expired');
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$Qdelete->bindValue(':expired', time() - $duration);
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$Qdelete->execute();
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}
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/**
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* Set cache path
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* @return self
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*/
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public function setPath($path){
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$this->path = $path;
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return $this;
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}
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/**
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* Set HTTP GET parameters
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* @return self
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*/
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public function setParameters(array $param){
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$this->param = array_map('strtolower', $param);
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return $this;
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}
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////////////////////////////////////////////////////////////////////////////
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protected function getCacheKey(){
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if(is_null($this->param)) {
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throw new \Exception('Call "setParameters" first!');
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}
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return hash('sha1', $this->path . http_build_query($this->param), true);
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}
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}
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