113 lines
2.3 KiB
PHP
113 lines
2.3 KiB
PHP
<?php defined('BLUDIT') or die('Bludit CMS.');
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class dbJSON
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{
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public $db;
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public $dbBackup;
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public $file;
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public $firstLine;
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// $file, the JSON file.
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// $firstLine, TRUE if you want to remove the first line, FALSE otherwise.
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function __construct($file, $firstLine=true)
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{
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$this->file = $file;
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$this->db = array();
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$this->dbBackup = array();
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$this->firstLine = $firstLine;
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if(file_exists($file))
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{
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// Read JSON file.
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$lines = file($file);
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// Remove the first line, the first line is for security reasons.
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if($firstLine) {
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unset($lines[0]);
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}
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// Regenerate the JSON file.
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$implode = implode($lines);
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// Unserialize, JSON to Array.
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$array = $this->unserialize($implode);
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if(empty($array)) {
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Log::set(__METHOD__.LOG_SEP.'Invalid JSON file: '.$file.', cannot be decoded. Check the file content.');
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}
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else {
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$this->db = $array;
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$this->dbBackup = $array;
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}
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}
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}
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public function restoreDB()
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{
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$this->db = $this->dbBackup;
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return true;
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}
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// Returns the amount of database items.
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public function count()
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{
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return count($this->db);
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}
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// Returns the value from the field.
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public function getField($field)
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{
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if(isset($this->db[$field])) {
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return $this->db[$field];
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}
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return $this->dbFields[$field]['value'];
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}
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// Save the JSON file.
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public function save()
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{
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$data = '';
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if($this->firstLine) {
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$data = "<?php defined('BLUDIT') or die('Bludit CMS.'); ?>".PHP_EOL;
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}
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// Serialize database
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$data .= $this->serialize($this->db);
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// Backup the new database.
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$this->dbBackup = $this->db;
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// LOCK_EX flag to prevent anyone else writing to the file at the same time.
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if( file_put_contents($this->file, $data, LOCK_EX) ) {
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return true;
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}
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else {
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Log::set(__METHOD__.LOG_SEP.'Error occurred when trying to save the database file.');
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return false;
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}
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}
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// Returns a JSON encoded string on success or FALSE on failure.
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private function serialize($data)
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{
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return json_encode($data, JSON_PRETTY_PRINT);
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}
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// Returns the value encoded in json in appropriate PHP type.
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private function unserialize($data)
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{
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// NULL is returned if the json cannot be decoded.
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$decode = json_decode($data, true);
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// If NULL returns false.
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if(empty($decode)) {
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return false;
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}
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return $decode;
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}
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} |