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<?php


namespace calderawp\calderaforms\pro\log;

use calderawp\calderaforms\pro\container;
use Monolog\Handler\AbstractHandler;
use Monolog\Logger as Monolog;


/**
 * Class handler - Monolog handler for CF Pro remote logging
 * @package calderawp\calderaforms\pro\log
 */
class handler extends AbstractHandler
{

	/**
	 * Recent messages
	 *
	 * @since 0.11.0
	 *
	 * @var  array
	 */
	protected $recents;

	/**
	 * Name of CF transient for tracking recents
	 *
	 * @since 0.11.0
	 *
	 * @var string
	 */
	protected $tracking_key;

	/**
	 * {@inheritdoc}
	 * @since 0.5.0
	 */
	public function handle(array $record)
	{
		$level = isset($record[ 'level_name' ]) ? $record[ 'level_name' ] : Monolog::NOTICE;

		if ( !$this->high_enough_level($level) ) {
			return;
		}

		$message = isset($record[ 'message' ]) ? $record[ 'message' ] : '';

		if ( empty($message) || $this->is_recent_repeat($message) ) {
			return;
		}

		$prepared = $this->prepare($record);

		container::get_instance()->get_logger()->send(
			$message,
			$prepared,
			$level
		);

	}

	/**
	 * Find if a log level is high enough to report according to settings and filters.
	 *
	 * @since 1.5.9
	 *
	 * @param string $level The level
	 *
	 * @return bool
	 */
	protected function high_enough_level($level)
	{
		$levels = Monolog::getLevels();
		if ( array_key_exists($level, $levels) ) {
			$level = array_search($level, array_flip($levels));
		} else {
			return true;
		}

		/**
		 * Change the minimum level for a message to be logged at
		 *
		 * @since 0.11.0
		 *
		 */
		$highest = apply_filters('caldera_forms_pro_minimum_level',
			container::get_instance()->get_settings()->get_log_level());
		if ( !is_numeric($highest) && array_key_exists($highest, $levels) ) {
			$highest = array_search($highest, array_flip($levels));

		}
		if ( $highest > $level ) {
			return false;
		}

		return true;
	}

	/**
	 * Prepare data to be sent to remote API
	 *
	 * @since 0.5.0
	 *
	 * @param array $record
	 *
	 * @return array
	 */
	protected function prepare(array $record)
	{
		$prepared = [];

		$prepared[ 'location' ] = [
			'file' => isset($record[ 'context' ][ 'file' ]) ? $record[ 'context' ][ 'file' ] : '',
			'line' => isset($record[ 'context' ][ 'line' ]) ? $record[ 'context' ][ 'line' ] : '',

		];

		foreach ( [
					  'array',
					  'property',
					  'cb',
				  ] as $thing ) {
			if ( isset($record[ 'context' ][ $thing ]) ) {
				$prepared[ $thing ] = $record[ 'context' ][ $thing ];
			}

		}

		if ( isset($record[ 'extra' ]) ) {
			$prepared = array_merge($prepared, $record[ 'extra' ]);
		}

		if ( method_exists('Caldera_Forms_DB_Tables',
				'get_missing_tables') && is_object(container::get_instance()->get_tables()) ) {
			$prepared[ 'missing_tables' ] = container::get_instance()->get_tables()->get_missing_tables();
		}

		return $prepared;


	}

	/**
	 * Check if this is a recent message
	 *
	 * @since 0.11.0
	 *
	 * @param string $message Message to test
	 *
	 * @return bool
	 */
	protected function is_recent_repeat($message)
	{
		if ( empty($this->tracking_key) ) {
			$this->tracking_key = caldera_forms_pro_log_tracker_key(CF_PRO_VER);
		}

		$hash = md5($message);
		if ( in_array($hash, $this->get_recent()) ) {
			return true;
		}

		$max = 10;
		if ( 2 < count($this->recents) ) {
			$this->recents = array_splice($this->recents, 0 - $max);
		}

		$this->recents[] = $hash;
		\Caldera_Forms_Transient::set_transient($this->tracking_key, $this->recents);
		return false;

	}

	/**
	 * Get array of recently tracked messages
	 *
	 * @since 0.11.0
	 *
	 * @return array
	 */
	protected function get_recent()
	{
		if ( empty($this->recents) ) {
			$this->recents = \Caldera_Forms_Transient::get_transient($this->tracking_key);

		}

		if ( empty($this->recents) ) {
			$this->recents = [];
		}

		return array_unique($this->recents);
	}


}


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