<?php
namespace CUSTER;

/*
* it means someone outside wp is accessing the file, in this case kill it.
*/
if (!defined('ABSPATH')) {
	die('You can not access this file!');
}


/*
* change the current user to the author id of the current object
* the only option is to force the author
* -> there is no sens in forcing the logged_in, because it's already the default
*
* [custer_author_id]                                    -> give current user the id of author
* [custer_author_id off]                                -> reset to logged_in
*
* ! anchors not workink for the moment
* //[custer_author_id set_anchor='anchor_name']           -> create anchor for author user
* //[custer_author_id anchor='anchor_name']               -> give current user the id stored in the anchor_name
*
*/
function shortcode_author_id($options) {
	$anchor_name = '';
	$option = '';
	$is_set_anchor = false;


	/*
	* set option value :
	* 'off', 'author', 'set_anchor', or 'anchor'
	*
	*/
	if (empty($options)) {
		$option = 'author';
	}
	if (isset($options['set_anchor'])) {
		$option = 'author';
//		$is_set_anchor = true;
//		$anchor_name = $options['set_anchor'];
//		if (empty($anchor_name)) {
//			return;
//		}
		unset($options['set_anchor']);
	}
	if (isset($options['anchor'])) {
//		if ($is_set_anchor) {
//			return;
//		}
//		$option = 'anchor';
//		$anchor_name = $options['anchor'];
//		if (empty($anchor_name)) {
//			return;
//		}
		unset($options['anchor']);
	}
	if (is_array($options) && in_array('off', $options)) {
		$option = 'off';
	}

	if (empty($option)) {
		return;
	}


	/*
	* find id according to option
	* if option is set_anchor, it sets it and return 0
	*
	*/
	$id = \CUSTER\find_id_wih_option($option, $anchor_name);
	if ($id === 0) {
		return;
	}


	/*
	* set current user
	*
	*/
	if ($is_set_anchor) {
		\CUSTER\create_anchor($anchor_name, $id);
	}
	else {
		wp_set_current_user($id);
	}
}
add_shortcode('custer_author_id', __NAMESPACE__.'\shortcode_author_id');


function create_anchor($anchor_name, $id) {
	$option_anchor = Custer::OPTION_ANCHOR;

	/*
	* if needed, create the option
	*
	*/
	if (false === get_option($option_anchor)) {
		add_option($option_anchor, array());
	}


	/*
	* add or update the id for the anchor name
	*
	*/
	$anchors = get_option($option_anchor);
	$anchors[$anchor_name] = $id;
	update_option($option_anchor, $anchors);
}


/*
* find ids according to options :
* - author : change the current user to the author of the page or post
* - anchor : uses the id stored in options with anchor_name
* - off : reset current user to the id before the changes
*
*/
function find_id_wih_option($option, $anchor_name) {
	if ($option === 'author') {
		$id = \CUSTER\get_author_id();
		Custer::set_current_user_backup();
	}
	else if ($option === 'anchor') {
		$id = \CUSTER\get_anchor_id($anchor_name);
		Custer::set_current_user_backup();
	}
	else if ($option === 'off') {
		$id = Custer::reset_current_user_backup();
	}
	return $id;
}


?>