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<?php
/**
* SQLPermanentStorage
*
* Generic SQL Store to store key value pairs. To be used in several other modules that needs
* to store data permanently.
*
* @author Andreas Åkre Solberg <andreas@uninett.no>, UNINETT AS.
* @package simpleSAMLphp
*/
class sspmod_core_Storage_SQLPermanentStorage {
private $db;
function __construct($name, $config = NULL) {
if (is_null($config))
$config = SimpleSAML_Configuration::getInstance();
$datadir = $config->getPathValue('datadir', 'data/');
if (!is_dir($datadir))
throw new Exception('Data directory [' . $datadir. '] does not exist');
if (!is_writable($datadir))
throw new Exception('Data directory [' . $datadir. '] is not writable');
$sqllitedir = $datadir . 'sqllite/';
if (!is_dir($sqllitedir)) {
mkdir($sqllitedir);
}
$dbfile = $sqllitedir . $name . '.sqllite';
if ($this->db = new SQLiteDatabase($dbfile)) {
$q = @$this->db->query('SELECT key1 FROM data LIMIT 1');
if ($q === false) {
$this->db->queryExec('
CREATE TABLE data (
key1 text,
key2 text,
type text,
value text,
created timestamp,
updated timestamp,
expire timestamp,
PRIMARY KEY (key1,key2,type)
);
');
}
} else {
throw new Exception('Error creating SQL lite database [' . $dbfile . '].');
}
}
public function set($type, $key1, $key2, $value, $duration = NULL) {
if ($this->exists($type, $key1, $key2)) {
$this->update($type, $key1, $key2, $value, $duration);
} else {
$this->insert($type, $key1, $key2, $value, $duration);
}
}
private function insert($type, $key1, $key2, $value, $duration = NULL) {
$setDuration = '';
if (is_null($duration)) {
$setDuration = 'NULL';
} else {
$setDuration = "'" . sqlite_escape_string(time() + $duration) . "'";
}
$query = "INSERT INTO data (key1,key2,type,created,updated,expire,value) VALUES (" .
"'" . sqlite_escape_string($key1) . "'," .
"'" . sqlite_escape_string($key2) . "'," .
"'" . sqlite_escape_string($type) . "'," .
"'" . sqlite_escape_string(time()) . "'," .
"'" . sqlite_escape_string(time()) . "'," .
$setDuration . "," .
"'" . sqlite_escape_string(serialize($value)) . "')";
$results = $this->db->queryExec($query);
return $results;
}
private function update($type, $key1, $key2, $value, $duration = NULL) {
$setDuration = '';
if (is_null($duration)) {
$setDuration = ", expire = NULL ";
} else {
$setDuration = ", expire = '" . sqlite_escape_string(time() + $duration) . "' ";
}
$query = "UPDATE data SET " .
"updated = '" . sqlite_escape_string(time()) . "'," .
"value = '" . sqlite_escape_string(serialize($value)) . "'" .
$setDuration .
"WHERE " .
"key1 = '" . sqlite_escape_string($key1) . "' AND " .
"key2 = '" . sqlite_escape_string($key2) . "' AND " .
"type = '" . sqlite_escape_string($type) . "'";
$results = $this->db->queryExec($query);
# echo $query;
# echo $this->db>changes;
return $results;
}
public function get($type = NULL, $key1 = NULL, $key2 = NULL) {
$condition = self::getCondition($type, $key1, $key2);
$query = "SELECT * FROM data WHERE " . $condition;
$results = $this->db->arrayQuery($query, SQLITE_ASSOC);
# echo '<pre>type: ' . $type . ' key1:' . $key1 . ' ' . $query; print_r($results); exit;
if (count($results) !== 1) return NULL;
$res = $results[0];
$res['value'] = unserialize($res['value']);
return $res;
}
/*
* Return the value directly (not in a container)
*/
public function getValue($type = NULL, $key1 = NULL, $key2 = NULL) {
$res = $this->get($type, $key1, $key2);
if ($res === NULL) return NULL;
return $res['value'];
}
public function exists($type, $key1, $key2) {
$query = "SELECT * FROM data WHERE " .
"key1 = '" . sqlite_escape_string($key1) . "' AND " .
"key2 = '" . sqlite_escape_string($key2) . "' AND " .
"type = '" . sqlite_escape_string($type) . "' LIMIT 1";
$results = $this->db->arrayQuery($query, SQLITE_ASSOC);
return (count($results) == 1);
}
public function getList($type = NULL, $key1 = NULL, $key2 = NULL) {
$condition = self::getCondition($type, $key1, $key2);
$query = "SELECT * FROM data WHERE " . $condition;
$results = $this->db->arrayQuery($query, SQLITE_ASSOC);
if (count($results) == 0) return NULL;
foreach($results AS $key => $value) {
$results[$key]['value'] = unserialize($results[$key]['value']);
}
return $results;
}
public function getKeys($type = NULL, $key1 = NULL, $key2 = NULL, $whichKey = 'type') {
if (!in_array($whichKey, array('key1', 'key2', 'type')))
throw new Exception('Invalid key type');
$condition = self::getCondition($type, $key1, $key2);
$query = "SELECT DISTINCT " . $whichKey . " FROM data WHERE " . $condition;
$results = $this->db->arrayQuery($query, SQLITE_ASSOC);
if (count($results) == 0) return NULL;
$resarray = array();
foreach($results AS $key => $value) {
$resarray[] = $value[$whichKey];
}
return $resarray;
}
public function remove($type, $key1, $key2) {
$query = "DELETE FROM data WHERE " .
"key1 = '" . sqlite_escape_string($key1) . "' AND " .
"key2 = '" . sqlite_escape_string($key2) . "' AND " .
"type = '" . sqlite_escape_string($type) . "'";
$results = $this->db->arrayQuery($query, SQLITE_ASSOC);
return (count($results) == 1);
}
public function removeExpired() {
$query = "DELETE FROM data WHERE expire NOT NULL AND expire < " . time();
$this->db->arrayQuery($query, SQLITE_ASSOC);
$changes = $this->db->changes();
return $changes;
}
/**
* Create a SQL condition statement based on parameters
*/
private static function getCondition($type = NULL, $key1 = NULL, $key2 = NULL) {
$conditions = array();
if (!is_null($type)) $conditions[] = "type = '" . sqlite_escape_string($type) . "'";
if (!is_null($key1)) $conditions[] = "key1 = '" . sqlite_escape_string($key1) . "'";
if (!is_null($key2)) $conditions[] = "key2 = '" . sqlite_escape_string($key2) . "'";
if (count($conditions) === 0) return '1';
$condition = join(' AND ', $conditions);
return $condition;
}
}
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