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<?php defined( 'ABSPATH' ) or die();

/**
 * Create a generic read more text with link for help texts.
 *
 * @param string $url
 * @param bool   $add_space
 *
 * @return string
 */
function rsssl_le_read_more( $url, $add_character = ' ' ) {
	$html = sprintf( __( "For more information, please read this %sarticle%s",
		'really-simple-ssl' ), '<a target="_blank" rel="noopener noreferrer" href="' . $url . '">',
		'</a>' );
	if ( is_string($add_character) ) {
		$html = $add_character . $html;
	}

	return $html;
}


/**
 * Check if we need to use DNS verification
 * @return bool
 */
function rsssl_dns_verification_required(){

	/**
	 * If our current hosting provider does not allow or require local SSL certificate generation,
	 * We do not need to DNS verification either.
	 */

	if ( !rsssl_do_local_lets_encrypt_generation() ) {
		return false;
	}

	if ( rsssl_get_option('verification_type')==='dns' ) {
		return true;
	}

	if ( rsssl_wildcard_certificate_required() ) {
		return true;
	}

	return false;
}

if ( !function_exists('rsssl_is_cpanel')) {
	/**
	 * Check if we're on CPanel
	 *
	 * @return bool
	 */
	function rsssl_is_cpanel() {
		$open_basedir = ini_get("open_basedir");
		if ( empty($open_basedir) && file_exists( "/usr/local/cpanel" ) ) {
			return true;
		} else if (rsssl_check_port(2082)) {
			return true;
		} else {
			return false;
		}
	}
}

if (!function_exists('rsssl_cpanel_api_supported')) {
	/**
	 * Check if CPanel supports the api
	 *
	 * @return bool
	 */
	function rsssl_cpanel_api_supported() {
		if ( rsssl_is_cpanel() ) {
			return true;
		}

		return !rsssl_openbasedir_restriction("/usr/local/cpanel/php/cpanel.php") && file_exists( "/usr/local/cpanel/php/cpanel.php" );
	}
}

if (!function_exists('rsssl_activated_by_default')) {
	/**
	 * Check if the host has ssl, activated by default
	 *
	 * @return bool
	 */
	function rsssl_activated_by_default() {
		$activated_by_default =  false;
		$activated_by_default_hosts = RSSSL_LE()->hosts->activated_by_default;
		$current_host         = rsssl_get_other_host();
		if ( in_array( $current_host, $activated_by_default_hosts ) ) {
			$activated_by_default =  true;
		}
		return $activated_by_default;
	}
}

if ( !function_exists('rsssl_openbasedir_restriction')) {
	function rsssl_openbasedir_restriction( string $path): bool {

		// Default error handler is required
		set_error_handler(null);

		// Clean last error info.
		error_clear_last();

		// Testing...
		@file_exists($path);

		// Restore previous error handler
		restore_error_handler();

		// Return `true` if error has occurred
		return ($error = error_get_last()) && $error['message'] !== '__clean_error_info';
	}
}

if (!function_exists('rsssl_activation_required')) {
	/**
	 * Check if the host has ssl, activation required
	 *
	 * @return bool
	 */
	function rsssl_activation_required() {
		$dashboard_activation_required =  false;
		$dashboard_activation_required_hosts = RSSSL_LE()->hosts->dashboard_activation_required;
		$current_host         = rsssl_get_other_host();
		if ( in_array( $current_host, $dashboard_activation_required_hosts ) ) {
			$dashboard_activation_required =  true;
		}
		return $dashboard_activation_required;
	}
}

if (!function_exists('rsssl_paid_only')) {
	/**
	 * Check if the host has ssl, paid only
	 *
	 * @return bool
	 */
	function rsssl_paid_only() {
		$paid_only =  false;
		$paid_only_hosts = RSSSL_LE()->hosts->paid_only;
		$current_host         = rsssl_get_other_host();
		if ( in_array( $current_host, $paid_only_hosts ) ) {
			$paid_only =  true;
		}
		return $paid_only;
	}
}

if ( !function_exists('rsssl_is_plesk')) {
	/**
	 * https://stackoverflow.com/questions/26927248/how-to-detect-servers-control-panel-type-with-php
	 * @return false
	 */
	function rsssl_is_plesk() {

		if ( get_option('rsssl_hosting_dashboard')==='plesk' ){
			return true;
		}

		//cpanel takes precedence, as it's more precise
		if ( rsssl_is_cpanel() ) {
			return false;
		}

		$open_basedir = ini_get("open_basedir");
		if ( empty($open_basedir) && is_dir( '/usr/local/psa' ) ) {
			return true;
		} else if (rsssl_check_port(8443)) {
			return true;
		} else {
			return false;
		}
	}
}

if ( !function_exists('rsssl_is_directadmin')) {
	/**
	 * https://stackoverflow.com/questions/26927248/how-to-detect-servers-control-panel-type-with-php
	 * @return bool
	 */
	function rsssl_is_directadmin() {
		if ( get_option('rsssl_hosting_dashboard')==='directadmin' ){
			return true;
		}

		//cpanel takes precedence, as it's more precise
		if ( rsssl_is_cpanel() ) {
			return false;
		}

		if ( rsssl_is_plesk() ) {
			return false;
		}

		if (rsssl_check_port(2222)) {
			return true;
		} else {
			return false;
		}
	}
}

/**
 * @param int $port
 *
 * @return bool
 */

function rsssl_check_port( $port)
{
	$port_check_status = get_option("rsssl_port_check_$port");
	if ( !function_exists('fsockopen') || $port_check_status === 'fail' ) {
		return false;
	}

	$ipAddress = gethostbyname('localhost');
	$link = @fsockopen( $ipAddress, $port, $errno, $error, 5 );

	if ( $link ) {
		update_option("rsssl_port_check_$port", 'success', false);
		return true;
	}

	update_option("rsssl_port_check_$port", 'fail', false);
	return false;
}

if ( !function_exists('rsssl_get_other_host') ) {
	/**
	 * Get the selected hosting provider, if any.
	 * @return bool|string
	 */
	function rsssl_get_other_host() {
		return rsssl_get_option( 'other_host_type', false );
	}
}

/**
 * Add some information to the javascript
 * @param array $args
 *
 * @return array
 */
function rsssl_le_localize_script($args){
	$hosting_dashboard = 'other';
	if ( rsssl_is_cpanel() ) $hosting_dashboard = 'cpanel';
	if ( rsssl_is_directadmin() ) $hosting_dashboard = 'directadmin';
	if ( rsssl_is_plesk() ) $hosting_dashboard = 'plesk';
	$args['hosting_dashboard'] = $hosting_dashboard;
	return $args;
}
add_filter("rsssl_localize_script", 'rsssl_le_localize_script', 10, 3);


if ( !function_exists('rsssl_progress_add')) {
	/**
	 * @param string $item
	 */
	function rsssl_progress_add( $item ) {
		$progress = get_option( "rsssl_le_installation_progress", array() );
		if ( ! in_array( $item, $progress ) ) {
			$progress[] = $item;
			update_option( "rsssl_le_installation_progress", $progress, false );
		}
	}
}

if ( !function_exists('rsssl_uses_known_dashboard')) {
	/**
	 * Check if website uses any of the known dashboards.
	 */
	function rsssl_uses_known_dashboard( ) {
		if ( rsssl_is_cpanel() || rsssl_is_plesk() || rsssl_is_directadmin() ) {
			return true;
		} else {
			return false;
		}
	}
}

if ( !function_exists('rsssl_is_ready_for')) {
	/**
	 * @param string $item
	 */
	function rsssl_is_ready_for( $item ) {
		if ( !rsssl_do_local_lets_encrypt_generation() ) {
			rsssl_progress_add('directories');
			rsssl_progress_add('generation');
			rsssl_progress_add('dns-verification');
		}

		if ( !rsssl_dns_verification_required() ) {
			rsssl_progress_add('dns-verification');
		}

		if (empty(rsssl_get_not_completed_steps($item))){
			return true;
		} else{
			return false;
		}
	}
}

 function rsssl_get_not_completed_steps($item){
	$sequence = array_column( rsssl_le_steps(), 'id');
	//drop first
	array_shift($sequence);
	//drop all statuses after $item. We only need to know if all previous ones have been completed
	$index = array_search($item, $sequence);
	$sequence = array_slice($sequence, 0, $index, true);
	$not_completed = array();
	$finished = get_option("rsssl_le_installation_progress", array());
	foreach ($sequence as $status ) {
		if (!in_array($status, $finished)) {
			$not_completed[] = $status;
		}
	}

	return $not_completed;
}

if ( !function_exists('rsssl_progress_remove')) {
	/**
	 * @param string $item
	 */
	function rsssl_progress_remove( $item ) {
		$progress = get_option( "rsssl_le_installation_progress", array() );
		if ( in_array( $item, $progress ) ) {
			$index = array_search( $item, $progress );
			unset( $progress[ $index ] );
			update_option( "rsssl_le_installation_progress", $progress, false );
		}
	}
}

if ( !function_exists('rsssl_do_local_lets_encrypt_generation')) {
	/**
	 * Check if the setup requires local certificate generation
	 * @return bool
	 */
	function rsssl_do_local_lets_encrypt_generation() {
		$not_local_cert_hosts = RSSSL_LE()->hosts->not_local_certificate_hosts;
		$current_host         = rsssl_get_other_host();
		if ( in_array( $current_host, $not_local_cert_hosts ) ) {
			return false;
		}
		return true;
	}
}

if ( !function_exists('rsssl_get_manual_instructions_text')) {
	/**
	 * Manual installation instructions
	 *
	 * @param string $url
	 *
	 * @return string
	 */
	function rsssl_get_manual_instructions_text( $url ) {
		$default_url = 'https://really-simple-ssl.com/install-ssl-certificate';
		$dashboard_activation_required = rsssl_activation_required();
		$activated_by_default = rsssl_activated_by_default();
		$paid_only = rsssl_paid_only();
		$button_activate = '<br><a href="' . $default_url . '" target="_blank" rel="noopener noreferrer" class="button button-primary">' . __( "Instructions", "really-simple-ssl" ) . '</a>&nbsp;&nbsp;';
		$button_complete = '<br><a href="' . $default_url . '" target="_blank" rel="noopener noreferrer" class="button button-primary">' . __( "Instructions", "really-simple-ssl" ) . '</a>&nbsp;&nbsp;';

		if ( $url === $default_url ) {
			$complete_manually = sprintf( __( "Please complete manually in your hosting dashboard.", "really-simple-ssl" ), '<a target="_blank" href="' . $url . '">', '</a>' );
			$activate_manually = sprintf( __( "Please activate it manually on your hosting dashboard.", "really-simple-ssl" ), '<a target="_blank" href="' . $url . '">', '</a>' );
		} else {
			$complete_manually = sprintf( __( "Please complete %smanually%s", "really-simple-ssl" ), '<a target="_blank" rel="noopener noreferrer" href="' . $url . '">', '</a>' );
			$activate_manually = sprintf( __( "Please activate it on your dashboard %smanually%s", "really-simple-ssl" ), '<a target="_blank" rel="noopener noreferrer" href="' . $url . '">', '</a>' );
			$button_activate   .= '<a href="' . $url . '" target="_blank" rel="noopener noreferrer" class="button button-primary">' . __( "Go to activation", "really-simple-ssl" ) . '</a>';
			$button_complete   .= '<a href="' . $url . '" target="_blank" rel="noopener noreferrer" class="button button-primary">' . __( "Go to installation", "really-simple-ssl" ) . '</a>';
		}

		if ( $activated_by_default ) {
			$msg
				= sprintf( __( "According to our information, your hosting provider supplies your account with an SSL certificate by default. Please contact your %shosting support%s if this is not the case.",
					"really-simple-ssl" ), '<a target="_blank "rel="noopener noreferrer" href="' . $url . '">', '</a>' ) . '&nbsp' .
				  __( "After completing the installation, you can continue to the next step to complete your configuration.", "really-simple-ssl" );
		} else if ( $dashboard_activation_required ) {
			$msg = __( "You already have free SSL on your hosting environment.", "really-simple-ssl" ) . '&nbsp' .
			       $activate_manually . ' ' .
			       __( "After completing the installation, you can continue to the next step to complete your configuration.", "really-simple-ssl" )
			       . $button_activate;
		} else if ( $paid_only ) {
			$msg
				= sprintf( __( "According to our information, your hosting provider does not allow any kind of SSL installation, other then their own paid certificate. For an alternative hosting provider with SSL, see this %sarticle%s.",
				"really-simple-ssl" ), '<a target="_blank" rel="noopener noreferrer" href="https://really-simple-ssl.com/hosting-providers-with-free-ssl">', '</a>' );
		} else {
			$msg = __( "Your hosting environment does not allow automatic SSL installation.", "really-simple-ssl" ) . ' ' .
			       $complete_manually . ' ' .
			       sprintf( __( "You can follow these %sinstructions%s.", "really-simple-ssl" ), '<a target="_blank" rel="noopener noreferrer" href="' . $default_url . '">', '</a>' ) . '&nbsp' .
			       __( "After completing the installation, you can continue to the next step to complete your configuration.", "really-simple-ssl" )
			       . $button_complete;
		}

		return $msg;
	}
}

register_activation_hook( __FILE__, 'rsssl_set_activation_time_stamp' );
if ( ! function_exists( 'rsssl_set_activation_time_stamp' ) ) {
    function rsssl_set_activation_time_stamp( $networkwide ) {
        update_option( 'rsssl_activation_time', time(), false );
    }
}

if ( ! function_exists( 'rsssl_array_filter_multidimensional' ) ) {
    function rsssl_array_filter_multidimensional(
        $array, $filter_key, $filter_value
    ) {
        $new = array_filter( $array,
            function ( $var ) use ( $filter_value, $filter_key ) {
                return isset( $var[ $filter_key ] ) ? ( $var[ $filter_key ]
                    == $filter_value )
                    : false;
            } );

        return $new;
    }
}

if ( !function_exists('rsssl_is_subdomain') ) {
	/**
	 * Check if we're on a subdomain.
	 * If this is a www domain, we return false
	 */
	function rsssl_is_subdomain(){
		$domain = rsssl_get_domain();
		if ( strpos($domain, 'www.') !== false ) return false;
		$root = rsssl_get_root_domain($domain);
		if ($root === $domain ) {
			return false;
		} else {
			return true;
		}
	}
}

if ( !function_exists('rsssl_get_root_domain') ) {
	/**
	 * Get root domain of a domain
	 */
	function rsssl_get_root_domain($domain){
		$sub = strtolower(trim($domain));
		$count = substr_count($sub, '.');
		if($count === 2){
			if(strlen(explode('.', $sub)[1]) > 3) $sub = explode('.', $sub, 2)[1];
		} else if($count > 2){
			$sub = rsssl_get_root_domain(explode('.', $sub, 2)[1]);
		}
		return $sub;
	}
}

if ( ! function_exists( 'rsssl_get_domain' ) ) {
	/**
	 * Get current domain
	 *
	 * @return string
	 */
    function rsssl_get_domain() {
        //Get current domain
        $domain = site_url();
        //Parse to strip off any /subfolder/
        $parse = parse_url($domain);
        $domain = $parse['host'];
        $domain = str_replace(array('http://', 'https://' ), '', $domain);
        return $domain;
    }
}

function rsssl_insert_after_key($array, $key, $items){
	$keys = array_keys($array);
	$key = array_search($key, $keys);
	$array = array_slice($array, 0, $key, true) +
	$items +
	array_slice($array, 3, count($array)-3, true);

	return $array;
}

if ( !function_exists('rsssl_wildcard_certificate_required') ) {
	/**
	 * Check if the site requires a wildcard
	 *
	 * @return bool
	 */
	function rsssl_wildcard_certificate_required() {
		//if DNS verification, create wildcard.
		if ( rsssl_get_option('verification_type') === 'dns' ) {
			return true;
		}

		if ( ! is_multisite() ) {
			return false;
		} else {
			if ( defined( 'SUBDOMAIN_INSTALL' ) && SUBDOMAIN_INSTALL ) {
				return true;
			} else {
				return false;
			}
		}
	}
}

if ( !function_exists('rsssl_can_install_shell_addon') ) {

	/**
	 * check if this environment has shell capability
	 *
	 * @return bool
	 */

	function rsssl_can_install_shell_addon(){
		//if not cpanel
		if ( !rsssl_is_cpanel() ) {
			return false;
		}

		//if already installed
		if (defined('rsssl_shell_path')){
			return false;
		}

		if ( function_exists('shell_exec') || function_exists('system') || function_exists('passthru') || function_exists('exec') ) {
			return true;
		} else {
			return false;
		}
	}
}

if ( !function_exists('rsssl_generated_by_rsssl')) {
	/**
	 * If a bundle generation is completed, this value is set to true.
	 *
	 * @return bool
	 */
	function rsssl_generated_by_rsssl() {
		return get_option( 'rsssl_le_certificate_generated_by_rsssl' );
	}
}

/**
 * Checks if a CAA DNS record is preventing the use of Let's Encrypt for the current site.
 *
 * @return bool Returns true if a CAA DNS record exists and does not allow Let's Encrypt, false otherwise.
 */
if ( ! function_exists( 'rsssl_caa_record_prevents_le' ) ) {
	function rsssl_caa_record_prevents_le(): bool {
		// Get DNS CAA records for site_url()
		$caa_records = dns_get_record( parse_url( site_url(), PHP_URL_HOST ), DNS_CAA );

		// If no CAA records found, return false
		if ( empty( $caa_records ) ) {
			return false;
		}

		// Check if the CAA record contains letsencrypt.org
		$caa_contains_le = false;
		foreach ( $caa_records as $caa_record ) {
			if ( strpos( $caa_record['value'], 'letsencrypt.org' ) !== false ) {
				$caa_contains_le = true;
				break;
			}
		}

		// If the CAA record is set, but does not contain letsencrypt.org, return true;
		if ( ! $caa_contains_le ) {
			return true;
		}

		// CAA record contains Let's Encrypt, generation allowed
		return false;
	}
}