<?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.
 */
class Propeller_Ads_Loader
{

	/**
	 * @var      array $actions The actions registered with WordPress to fire when the plugin loads.
	 */
	protected $actions;

	/**
	 * @var      array $filters The filters registered with WordPress to fire when the plugin loads.
	 */
	protected $filters;

	/**
	 * Initialize the collections used to maintain the actions and filters.
	 */
	public function __construct()
	{

		$this->actions = array();
		$this->filters = array();

	}

	/**
	 * Add a new action to the collection to be registered with WordPress.
	 *
	 * @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.
	 * @param    string $callback      The name of the function definition on the $component.
	 * @param    int    $priority      Optional. he 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)
	{
		$this->actions = $this->add($this->actions, $hook, $component, $callback, $priority, $accepted_args);
	}

	/**
	 * A utility function that is used to register the actions and hooks into a single
	 * collection.
	 *
	 * @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    object $component     A reference to the instance of the object on which the filter is defined.
	 * @param    string $callback      The name of the function definition on the $component.
	 * @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, $component, $callback, $priority, $accepted_args)
	{

		$hooks[] = array(
			'hook' => $hook,
			'component' => $component,
			'callback' => $callback,
			'priority' => $priority,
			'accepted_args' => $accepted_args,
		);

		return $hooks;

	}

	/**
	 * Add a new filter to the collection to be registered with WordPress.
	 *
	 * @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.
	 * @param    string $callback      The name of the function definition on the $component.
	 * @param    int    $priority      Optional. he 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)
	{
		$this->filters = $this->add($this->filters, $hook, $component, $callback, $priority, $accepted_args);
	}

	/**
	 * Register the filters and actions with WordPress.
	 */
	public function run()
	{

		foreach ($this->filters as $hook) {
			add_filter($hook['hook'], array(
				$hook['component'],
				$hook['callback'],
			), $hook['priority'], $hook['accepted_args']);
		}

		foreach ($this->actions as $hook) {
			add_action($hook['hook'], array(
				$hook['component'],
				$hook['callback'],
			), $hook['priority'], $hook['accepted_args']);
		}

	}

}