bludit/bl-kernel/abstract/dbjson.class.php

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<?php defined('BLUDIT') or die('Bludit CMS.');
class dbJSON
{
public $db;
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public $dbBackup;
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public $file;
public $firstLine;
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// $file, the JSON file.
// $firstLine, TRUE if you want to remove the first line, FALSE otherwise.
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function __construct($file, $firstLine=true)
{
$this->file = $file;
$this->db = array();
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$this->dbBackup = array();
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$this->firstLine = $firstLine;
if(file_exists($file))
{
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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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// 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);
if(empty($array)) {
Log::set(__METHOD__.LOG_SEP.'Invalid JSON file: '.$file.', cannot be decoded. Check the file content.');
}
else {
$this->db = $array;
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$this->dbBackup = $array;
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}
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}
}
public function restoreDB()
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{
$this->db = $this->dbBackup;
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return true;
}
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// Returns the amount of database items.
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public function count()
{
return count($this->db);
}
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// Returns the value from the field.
public function getField($field)
{
if(isset($this->db[$field])) {
return $this->db[$field];
}
return $this->dbFields[$field]['value'];
}
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// Save the JSON file.
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public function save()
{
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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.
$this->dbBackup = $this->db;
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// LOCK_EX flag to prevent anyone else writing to the file at the same time.
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return file_put_contents($this->file, $data, LOCK_EX);
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}
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// Returns a JSON encoded string on success or FALSE on failure.
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private function serialize($data)
{
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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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// NULL is returned if the json cannot be decoded.
$decode = json_decode($data, true);
// If NULL returns false.
if(empty($decode)) {
return false;
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}
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return $decode;
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}
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}