remove-slot-as-per-production.php

class custom_20240106{

	static $instance = null;

	static $production_start_time = '10:00'; //time in 24hr format

	static $production_end_time = '18:00'; //time in 24hr format

	public $preparation_time;

	public $current_time;

	public $current_date;

	public $next_date;

	static function get_instance(){
		if(is_null(self::$instance)){
			self::$instance = new self();
		}
		return self::$instance;
	}

	function __construct(){
		$this->preparation_time = get_option('pi_order_preparation_hours', 240);

		$this->current_time = current_time('H:i');

		$this->current_date = current_time('Y/m/d');

		$this->next_date = date('Y/m/d', strtotime($this->current_date . ' +1 day'));

		add_filter('pisol_dtt_custom_remove_time_slots', [$this, 'removeTimeSlots'], 10, 2);
	}

	function removeTimeSlots($slots, $date){
		if($date == $this->next_date || $date == $this->current_date){
			$this->removeSlots($slots);
		}

		return $slots;
	}

	function removeSlots(&$slots){
		$production_end_time = $this->productionEndOn();
		foreach($slots as $key => $slot){
			if(strtotime($slot['from']) < strtotime($production_end_time)){
				unset($slots[$key]);
			}
		}

		return $slots;
	}

	function productionEndOn(){
		$current_time = current_time('Y/m/d H:i');
		$prodctuin_end_time = $this->current_date . ' ' . self::$production_end_time;
		$prodctuin_start_time = $this->current_date . ' ' . self::$production_start_time;
		$next_day_start_time = $this->next_date . ' ' . self::$production_start_time;

		if(strtotime($current_time) > strtotime($prodctuin_end_time)){
			$production_remaining = $this->preparation_time;
			$production_end_time = $this->productionEndTime($production_remaining, $next_day_start_time);
		}

		if(strtotime($current_time) < strtotime($prodctuin_start_time)){
			$production_remaining = $this->preparation_time;
			$production_end_time = $this->productionEndTime($production_remaining, $prodctuin_start_time);
		}

		if(strtotime($current_time) >= strtotime($prodctuin_start_time) && strtotime($current_time) <= strtotime($prodctuin_end_time)){
			$production_minutes_available_today = (strtotime($prodctuin_end_time) - strtotime($current_time)) / 60;
			if($production_minutes_available_today >= $this->preparation_time){
				$production_remaining = 0;
				$production_end_time = $this->productionEndTime($production_remaining, current_time('Y/m/d H:i'));
			}else{
				$production_remaining = $this->preparation_time - $production_minutes_available_today;
				$production_end_time = $this->productionEndTime($production_remaining, $next_day_start_time);
			}
			
		}

		return $production_end_time;
	}

	function productionEndTime($production_remaining, $production_start_time){
		$production_end_time = date('Y/m/d H:i', strtotime($production_start_time . ' +'.$production_remaining.' minutes'));
		return $production_end_time;
	}

}
custom_20240106::get_instance();