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<?php |
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|
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namespace BerqWP; |
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|
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class RateLimiter |
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{ |
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private $limit; |
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private $timeWindow; |
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// In seconds |
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private $storagePath; |
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public function __construct($limit, $timeWindow, $storagePath) |
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{ |
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$this->limit = $limit; |
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$this->timeWindow = $timeWindow; |
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// e.g. 60 seconds for 1 minute |
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$this->storagePath = rtrim($storagePath, '/') . '/'; |
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} |
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public function isRateLimited($clientIdentifier) |
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{ |
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if (!is_dir($this->storagePath)) { |
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mkdir($this->storagePath, 0755, \true); |
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} |
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$filePath = $this->storagePath . md5($clientIdentifier) . '.json'; |
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if (!file_exists($filePath)) { |
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// Create a new entry if it doesn't exist |
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$this->createLog($filePath); |
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return \false; |
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// Not rate limited |
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} |
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// Read the log file |
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$logData = json_decode(file_get_contents($filePath), \true); |
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$currentTime = time(); |
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if (!is_array($logData)) { |
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$logData = []; |
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} |
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// Remove old entries from the time window |
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$logData = array_filter($logData, function ($timestamp) use ($currentTime) { |
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return $currentTime - $timestamp <= $this->timeWindow; |
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}); |
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// Check if the limit is reached |
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if (count($logData) >= $this->limit) { |
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return \true; |
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// Rate limited |
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} |
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// Otherwise, add the new timestamp and update the log |
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$logData[] = $currentTime; |
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file_put_contents($filePath, json_encode($logData)); |
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return \false; |
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} |
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private function createLog($filePath) |
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{ |
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$logData = [time()]; |
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file_put_contents($filePath, json_encode($logData)); |
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} |
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} |
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