<?php
_deprecated_file( __FILE__, '4.6.21', 'Deprecated class in favor of using `tribe_asset` registration' );

abstract class Tribe__Events__Asset__Abstract_Asset {

	/**
	 * @var string
	 */
	protected $name;

	/**
	 * @var array
	 */
	protected $deps;

	/**
	 * @var string
	 */
	protected $vendor_url;

	/**
	 * @var string
	 */
	protected $prefix;

	/**
	 * @var Tribe__Events__Main
	 */
	protected $tec;

	/**
	 * @var array An array specifying aliases for this asset package scripts or styles.
	 *
	 * @see Tribe__Events__Asset__Abstract_Asset::has_script_alias()
	 */
	protected $aliases = array();

	public function set_name( $name ) {
		$this->name = $name;
	}

	public function set_deps( $deps ) {
		$this->deps = $deps;
	}

	public function set_vendor_url( $vendor_url ) {
		$this->vendor_url = $vendor_url;
	}

	public function set_prefix( $prefix ) {
		$this->prefix = $prefix;
	}

	public function set_tec( $tec ) {
		$this->tec = $tec;
	}

	/*
	 * Handles the asset request
	 */
	abstract public function handle();

	/**
	 * @return array
	 */
	public function get_aliases() {
		return $this->aliases;
	}

	/**
	 * @param array $aliases
	 */
	public function set_aliases( $aliases ) {
		$this->aliases = $aliases;
	}

	/**
	 * Filters the script version.
	 *
	 * Uses `Tribe__Events__Main::VERSION` by default.
	 *
	 * @param string $filter The filter name, `tribe_events_js_version` by
	 *                       default.
	 *
	 * @return mixed|void
	 */
	protected function filter_js_version( $filter = null ) {
		$filter = is_string( $filter ) ? $filter : 'tribe_events_js_version';

		return apply_filters( $filter, Tribe__Events__Main::VERSION );
	}

	/**
	 * Whether drop-in replacement for this asset package script have been already loaded
	 * from other plugins or not.
	 *
	 * The drop-in replacements in the `aliases` property are manually curated and tested on a
	 * single asset package base; the method will not make any guessing or interpolation.
	 * E.g. the `Select2` asset package specifies that if ACF is active and the `select2` handle
	 * has been queued already then there is no need to queue our own version of `select2`.
	 *
	 * If a more complex and context aware test is needed to discern the presence of script
	 * alias then the value of an `aliases` entry can be set to a callable that should return a bool value, e.g.:
	 *
	 *      $aliases = array(
	 *          'select2' => array(
	 *              'some-plugin/plugin.php' => 'select-2-js', // normal handle test
	 *              'another-plugin/plugin.php' => array( 'Tribe__Spotter' , 'loaded_select_2' ),
	 *           ),
	 *      );
	 *
	 * @param string $slug The slug this script is registered with in the `aliases` property.
	 *
	 * @return bool `true` if a know and tested plugin is active and has already queued a drop-in
	 *              replacement for the script or `false` otherwise.
	 */
	public function has_script_alias( $slug ) {
		if ( ! isset( $this->aliases[ $slug ] ) ) {
			return false;
		}

		global $wp_scripts;

		foreach ( $this->aliases[ $slug ] as $plugin => $registration_handle ) {
			include_once( ABSPATH . 'wp-admin/includes/plugin.php' );

			if ( ! is_plugin_active( $plugin ) ) {
				continue;
			}

			if ( ! is_callable( $registration_handle ) ) {
				if ( in_array( $registration_handle, $wp_scripts->queue ) ) {
					return true;
				}
			} else {
				$has_alias = call_user_func( $registration_handle, $slug );
				if ( $has_alias ) {
					return true;
				}
			}
		}

		return false;
	}

}
