<?php

/**
 * Register all actions and filters for the plugin
 * Maintain a list of all hooks that are registered throughout the plugin, and register them with the WordPress API. 
 * Call the run function to execute the list of actions and filters.
 *
 * @since      1.0.0
 *
 * @package    Listings_For_Zillow_Free
 * @subpackage Listings_For_Zillow_Free/includes
 */
class LFZW_Fr_Loader {

	/**
	 * The array of actions registered with WordPress.
	 *
	 * @since    1.0.0
	 * @access   protected
	 * @var      array    
	 */
	protected $actions;

	/**
	 * The array of filters registered with WordPress.
	 *
	 * @since    1.0.0
	 * @access   protected
	 * @var      array   
	 */
	protected $filters;

	/**
	 * Initialize the collections used to maintain the actions and filters.
	 *
	 * @since    1.0.0
	 */
	public function __construct() {

		$this->actions = array();
		$this->filters = array();

	}

	/**
	 * Add a new action to the collection to be registered with WordPress.
	 *
	 * @since    1.0.0
	 * @param    string               $hook             The name of the WordPress action that is being registered.
	 * @param    object               $component        A reference to the instance of the object on which the action is defined OR the class on which static action is defined.
	 * @param    string               $callback         The name of the function definition on the $component.
	 * @param    int                  $priority         Optional. The priority at which the function should be fired. Default is 10.
	 * @param    int                  $accepted_args    Optional. The number of arguments that should be passed to the $callback. Default is 1.
	 */
	public function add_action( $hook, $component, $callback, $priority = 10, $accepted_args = 1 ) {
		
		if ( is_string( $component ) && method_exists( $component, $callback ) ) {
			// Static method
			$this->actions = $this->add( 
				$this->actions, 
				$hook, 
				array( $component, $callback ), 
				$priority, 
				$accepted_args 
			);
		} else {
			// Instance method
			$this->actions = $this->add( 
				$this->actions, 
				$hook, 
				array( $component, 
				$callback ), 
				$priority, 
				$accepted_args 
			);
		}
	}

	/**
	 * Add a new filter to the collection to be registered with WordPress.
	 *
	 * @since    1.0.0
	 * @param    string               $hook             The name of the WordPress filter that is being registered.
	 * @param    object               $component        A reference to the instance of the object on which the filter is defined OR the class on which static filter is defined.
	 * @param    string               $callback         The name of the function definition on the $component.
	 * @param    int                  $priority         Optional. The priority at which the function should be fired. Default is 10.
	 * @param    int                  $accepted_args    Optional. The number of arguments that should be passed to the $callback. Default is 1
	 */
	public function add_filter( $hook, $component, $callback, $priority = 10, $accepted_args = 1 ) {
		
		if ( is_string( $component ) && method_exists( $component, $callback ) ) {
			// Static method
			$this->filters = $this->add( 
				$this->filters, 
				$hook, 
				array( $component, $callback ), 
				$priority, 
				$accepted_args 
			);
		} else {
			// It's an instance method
			$this->filters = $this->add( 
				$this->filters, 
				$hook, 
				array( $component, $callback ), 
				$priority, 
				$accepted_args 
			);
		}
	}

	/**
	 * A utility function that is used to register the actions and hooks into a single
	 * collection.
	 *
	 * @since    1.0.0
	 * @access   private
	 * @param    array                $hooks            The collection of hooks that is being registered (that is, actions or filters).
	 * @param    string               $hook             The name of the WordPress filter that is being registered.
	 * @param    array                $callback         Array of class/instance and callback function definition
	 * @param    int                  $priority         The priority at which the function should be fired.
	 * @param    int                  $accepted_args    The number of arguments that should be passed to the $callback.
	 * @return   array                                  The collection of actions and filters registered with WordPress.
	 */
	private function add( $hooks, $hook, $callback, $priority, $accepted_args ) {

		$hooks[] = array(
			'hook'          => $hook,
			'callback'      => $callback,
			'priority'      => $priority,
			'accepted_args' => $accepted_args
		);

		return $hooks;

	}

	/**
	 * Register the filters and actions with WordPress.
	 *
	 * @since    1.0.0
	 * @return void
	 */
	public function run() {

		foreach ( $this->filters as $hook ) {
			add_filter( 
				$hook['hook'], 
				$hook['callback'],
				$hook['priority'], 
				$hook['accepted_args'] 
			);
		}

		foreach ( $this->actions as $hook ) {
			add_action( 
				$hook['hook'], 
				$hook['callback'],
				$hook['priority'], 
				$hook['accepted_args'] );
		}

	}

}