<?php
/**
 * Boostrap: Compatibility
 *
 * Server compatibility checks.
 *
 * @package SimplePay\Core\Bootstrap
 * @copyright Copyright (c) 2020, Sandhills Development, LLC
 * @license http://opensource.org/licenses/gpl-2.0.php GNU Public License
 * @since 3.6.0
 */

namespace SimplePay\Core\Bootstrap\Compatibility;

// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Create a list of server requirements.
 *
 * These requirements are based off the Stripe PHP binding dependencies.
 *
 * @link https://github.com/stripe/stripe-php
 * @link https://github.com/stripe/stripe-php#dependencies
 *
 * @since 3.6.0
 *
 * @return array List of requirements.
 */
function get_requirements_list() {
	return array(
		'wp'       => array(
			'name'     => 'WordPress',
			'requires' => '4.9.0',
			'met'      => version_compare( get_bloginfo( 'version' ), '4.9.0', '>=' ),
		),
		'php'      => array(
			'name'     => 'PHP',
			'requires' => '5.6.0',
			'met'      => version_compare( PHP_VERSION, '5.6.0', '>=' ),
		),
		'curl'     => array(
			'name' => 'cURL',
			'met'  => function_exists( 'curl_version' ),
		),
		'json'     => array(
			'name' => 'JSON',
			'met'  => function_exists( 'json_encode' ),
		),
		'mbstring' => array(
			'name' => 'Multibyte String',
			'met'  => function_exists( 'mb_strtolower' ),
		),
	);
}

/**
 * Determines if all requirements are met.
 *
 * @since 3.6.0
 *
 * @return bool $met True if all requirements are met.
 */
function server_requirements_met() {
	$requirements = get_requirements_list();
	$to_meet      = wp_list_pluck( $requirements, 'met' );
	$met          = ! array_search( false, $to_meet, true );

	return $met;
}

/**
 * Shows a notice for each unmet requirement.
 *
 * @since 3.6.0
 */
function show_admin_notices() {
	wp_load_translations_early();
	$requirements = get_requirements_list();

	foreach ( $requirements as $requirement ) {
		// Do nothing if the requirement is met.
		if ( true === $requirement['met'] ) {
			continue;
		}

		/**
		 * Generates a notice for an umet requirement.
		 *
		 * If a specific version number is required, show it.
		 *
		 * @since 3.6.0
		 *
		 * @uses $requirement Current requirement to check.
		 */
		add_action(
			'admin_notices',
			function() use ( $requirement ) {
				?>

<div class="error">
	<p>
				<?php
				if ( isset( $requirement['requires'] ) ) :
					echo wp_kses(
						sprintf(
							/* translators: %1$s Plugin name, do not translate. %2$s Requirement name, do not translate. %3$s Requirement version, do not translate. */
							__(
								'%1$s requires %2$s version %3$s or higher.',
								'simple-pay'
							),
							SIMPLE_PAY_PLUGIN_NAME,
							'<code>' . esc_html( $requirement['name'] ) . '</code>',
							'<code>' . esc_html( $requirement['requires'] ) . '</code>'
						),
						array(
							'code' => true,
						)
					);
			else :
				echo wp_kses(
					sprintf(
						/* translators: %1$s Plugin name, do not translate. %2$s Requirement name, do not translate. */
						__(
							'%1$s requires %2$s to be installed.',
							'simple-pay'
						),
						SIMPLE_PAY_PLUGIN_NAME,
						'<code>' . esc_html( $requirement['name'] ) . '</code>'
					),
					array(
						'code' => true,
					)
				);
			endif;
			?>
	</p>

	<p><strong><?php _e( 'Need help with your server? Ask your web host!', 'simple-pay' ); ?></strong></p>
	<p>
				<?php
				$hosting_url = add_query_arg(
					array(
						'utm_source'   => 'inside-plugin',
						'utm_medium'   => 'link',
						'utm_campaign' => defined( 'SIMPLE_PAY_ITEM_ID' ) ? 'pro-plugin' : 'lite-plugin',
						'utm_content'  => 'compatibility-check',
					),
					'https://wpsimplepay.com/recommended-wordpress-hosting/'
				);

				echo wp_kses(
					sprintf(
						/* translators: %1$s Opening anchor tag, do not translate. %2$s Closing anchor tag, do not translate. */
						__(
							'Many web hosts can give you instructions on how/where to upgrade your server through their control panel, or may even be able to do it for you. If you need to change hosts, please see %1$sour hosting recommendations%2$s.',
							'simple-pay'
						),
						'<a href="' . esc_url( $hosting_url ) . '" target="_blank" rel="noopener noreferrer">',
						'</a>'
					),
					array(
						'a' => array(
							'href'   => true,
							'target' => true,
							'rel'    => true,
						),
					)
				);
				?>
	</p>
</div>

				<?php
			}
		);
	}
}