<?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!');
}


/*
* return the result
*
*/
function return_result($output, $if_empty = '') {

	/*
	* if empty, apply options, or default empty string ''
	*
	*/
	if (empty($output)) {
		$output = $if_empty;
	}

	/*
	* if number, output a string
	*
	*/
	if (is_numeric($output)) {
		$output = (string)$output;
	}

	/*
	* if not scalar, stringify output
	*
	*/
	if (!is_scalar($output)) {
		$output = json_encode($output, JSON_UNESCAPED_SLASHES);
	}

	return esc_html($output);
}


/*
* format the output
* if is acf, use acf default format
*/
function format_user_info($query, $current_user, $user_id, $if_empty = '') {
	$output_date_format = Custer::USER_INFO_DATE_FORMAT;

	$is_acf = false;


	/*
	* if is special query __author_page__
	* return author page url
	*
	*/
	if ($query === '__author_page__') {
		$output = get_author_posts_url($user_id);
		return \CUSTER\return_result($output);
	}


	/*
	* if is special query __user_post__
	* return author page url
	*
	*/
	if ($query === '__user_post__') {
		$output = \CUSTER\find_user_post_url($user_id);
		return \CUSTER\return_result($output);
	}


	/*
	* check if it's an acf field
	*
	*/
	$acf_id = 'user_'.$user_id;
	$acf_object = get_field_object($query, $acf_id);
	if ($acf_object !== false)
		$is_acf = true;


	/*
	* if is acf, use the acf return format
	* otherwise, use the default wordpress value
	*
	*/
	if ($is_acf) {
		$output = get_field($query, $acf_id);
	}
	else {
		$output = $current_user->$query;
	}


	/*
	* try to extract a string
	*
	*/
	while (is_array($output) && count($output) === 1) {
		$output = reset($output);
	}


	/*
	* if is not acf
	* check if is a date
	* and format it
	* to create a DateTime from a time stamp : https://stackoverflow.com/a/12039058/9497573
	*
	*/
	if (!$is_acf) {
		$timestamp = false;
		if (is_string($output)) {
			$timestamp = strtotime($output);
		}
		if ($timestamp !== false) {
			//$date = new \DateTime('@' . $timestamp);
			$date = date_create('@' . $timestamp);
			$output = $date->format($output_date_format);
		}
	}


	/*
	* check options to format the result
	*
	*/
	return \CUSTER\return_result($output, $if_empty);
}


/*
* find the posts of the user and return the first one
*
*/
function find_user_post_url($user_id) {
	$user_post_url = '';

	$args = array(
		'post_type' => 'post',
		'author' => $user_id,
		'posts_per_page' => 1,
	);
	$posts = get_posts($args);

	if (empty($posts)) {
		$user_post_url = '';
	}
	else {
		$query = reset($posts);
		$user_post_url = get_permalink($query->ID);
	}

	return $user_post_url;
}


?>