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<?php
/**
* FlippingBook
*
* @package FlippingBook
* @author FlippingBook
* @copyright 2021 FlippingBook
* @license GPL-2.0-or-later
*
* @wordpress-plugin
* Plugin Name: FlippingBook
* Plugin URI: https://flippingbook.com/wordpress
* Description: FlippingBook plugin allows you to easily embed flipbooks made with FlippingBook into your Wordpress posts and pages.
* Version: 2.0.1
* Requires at least: 3.2
* Requires PHP: 5.5.0
* Author: FlippingBook
* Author URI: http://flippingbook.com
* License: GPL v2 or later
* License URI: https://www.gnu.org/licenses/gpl-2.0.html
* Text Domain: flippingbook
*/
function stringify_array(string $separator, array $array): string
{
$string = '';
foreach ($array as $i => $a) {
if (is_array($a)) {
$string .= stringify_array($separator, $a);
} else {
$string .= $i.$separator.$a;
if ($i < count($array) - 1) {
$string .= $separator;
}
}
}
return $string;
}
class Flippingbook {
public $default_cache_timeout = 86400;
public $minimal_cache_timeout = 3600;
public $default_oembed_ratio = '16:9';
function __construct() {
$flippingbook_options = get_option( 'flippingbook_options' );
/**
* Adding FlippingBook oEmbed providers to Wordpress allow list
*/
wp_oembed_add_provider( 'https://online.flippingbook.com/view/*', 'https://online.flippingbook.com/oembed' );
wp_oembed_add_provider( 'https://cld.bz/*', 'https://cld.bz/__oembed' );
wp_oembed_add_provider( 'https://*.cld.bz/*', 'https://cld.bz/__oembed' );
add_filter( 'oembed_dataparse', array( $this, 'process_flipingbook_oembed' ), 10, 2 );
if ( !empty($flippingbook_options) ) {
if ( !empty($flippingbook_options['custom_domain']) ) {
wp_oembed_add_provider( 'https://'.$flippingbook_options['custom_domain'].'/*', 'https://online.flippingbook.com/oembed' );
}
}
add_shortcode( 'flippingbook', array( $this, 'flippingbook_shortcode_handler' ) );
add_action( 'admin_init', array( $this, 'flippingbook_settings_init' ) );
add_action( 'admin_menu', array( $this, 'flippingbook_options_page' ) );
}
function process_flipingbook_oembed($return, $data) {
if ( 'FlippingBook' === $data->provider_name || 'FlippingBook Cloud' === $data->provider_name) {
$flippingbook_options = get_option( 'flippingbook_options' );
if ( !('FlippingBook Cloud' === $data->provider_name && !$this->check_publisher_version($return)) && !empty($flippingbook_options && !empty($flippingbook_options['responsive_oembed']) && '1' === $flippingbook_options['responsive_oembed']) ) {
$ratio = !empty( $flippingbook_options['oembed_ratio'] ) ? $flippingbook_options['oembed_ratio'] : $this->default_oembed_ratio;
$return = $this->process_oembed_html($return, $ratio);
}
$return = $this->add_embed_method($return, 'oEmbed');
}
return $return;
}
function check_publisher_version($html) {
$pattern = '/data-fb\w{1}-version=\"([\d.]*)\"/';
preg_match($pattern, $html, $matches);
return isset($matches[1]) && version_compare($matches[1], '2022.1.100', '>=');
}
function process_oembed_html($html, $ratio) {
$patterns = array ( '/data-fb(\w)-width="\w*%?"/', '/data-fb(\w)-height="\w*%?"/' );
$replacements = array( 'data-fb${1}-width="100%"', 'data-fb${1}-height="auto" data-fb${1}-ratio="'.$ratio.'"' );
return preg_replace($patterns, $replacements, $html);
}
function add_embed_method ($html, $method) {
$patterns = array ( '/data-fb(\w)-version="([\w.]*)"/' );
$replacements = array( 'data-fb${1}-version="${2}" data-fb${1}-method="'.$method.'"' );
return preg_replace($patterns, $replacements, $html);
}
function fix_size_for_oembed($args) {
$patterns = array ( '/px/', '/\d*%/', '/auto/');
$replacements = array( '', '500', '500');
$args['width'] = preg_replace($patterns, $replacements, $args['width']);
$args['height'] = preg_replace($patterns, $replacements, $args['height']);
return $args;
}
function process_shortcode_size($html, $ratio = NULL, $width = NULL, $height = NULL) {
if ( $ratio && !$width && !$height ) {
$patterns = array ( '/data-fb(\w)-width="\w*%?"/', '/data-fb(\w)-height="\w*%?"/' );
$replacements = array( 'data-fb${1}-width="100%"', 'data-fb${1}-height="auto" data-fb${1}-ratio="'.$ratio.'"' );
return preg_replace($patterns, $replacements, $html);
}
if ( $ratio ) {
$patterns = array ( '/data-fb(\w)-height="(\w*%?)"/' );
$replacements = array( 'data-fb${1}-height="${2}" data-fb${1}-ratio="'.$ratio.'"' );
$html = preg_replace($patterns, $replacements, $html);
}
if ( $width ) {
$patterns = array ( '/data-fb(\w)-width="\w*%?"/' );
$replacements = array( 'data-fb${1}-width="'.$width.'"' );
$html = preg_replace($patterns, $replacements, $html);
}
if ( $height ) {
$patterns = array ( '/data-fb(\w)-height="\w*%?"/' );
$replacements = array( 'data-fb${1}-height="'.$height.'"' );
$html = preg_replace($patterns, $replacements, $html);
}
return $html;
}
/**
* Handler for a [flippingbook] shortcode
*
* @param array $attrs
* @param string $content
* @param string $tag
*
* @return string - HTML embed code for flipbook
*/
function flippingbook_shortcode_handler( $attrs, $content, $tag ): string {
$wp_oembed = _wp_oembed_get_object();
$url = parse_url( $content );
$options = get_option('flippingbook_options');
$shortcode_hash = sha1($content . '_' . (is_array($attrs) ? stringify_array('_', $attrs) : $attrs));
$embed_transient = get_transient( 'flippingbook_'.$shortcode_hash );
if ( !empty( $embed_transient ) ){
return $embed_transient['embed_html'];
}
if ( ! empty( $url ) ) {
$a = shortcode_atts(
array(
'width' => NULL,
'height' => NULL,
'lightbox' => true,
'title' => NULL,
'mode' => NULL,
'page' => NULL,
'wheel' => NULL,
'analytics' => NULL,
'ratio' => NULL,
'thumbnail' => NULL,
'legacy' => NULL
), $attrs, $tag );
$orig_a = $a;
$a = $this->fix_size_for_oembed($a);
// add_filter('https_ssl_verify', '__return_false');
$content = trim($content);
$oembed_url = $wp_oembed->discover( $content );
if (! $oembed_url ) {
return __('Error embedding FlippingBook shortcode, please check the flipbook url. ('.$content.')', 'flippingbook');
}
$oembed_url_parts = explode("?", $oembed_url);
$provider_url = $oembed_url_parts[0];
$fetch_url = $provider_url . '?url='. $content . '&' . http_build_query($a);
$embed_data = $wp_oembed->__call('_fetch_with_format', array( $fetch_url, 'json' ));
if (!is_wp_error($embed_data)) {
if (! empty( $embed_data ) && ! empty( $embed_data->html ) && is_string( $embed_data->html ) ) {
$embed_html = $this->process_shortcode_size($embed_data->html, $orig_a['ratio'], $orig_a['width'], $orig_a['height']);
$embed_html = $this->add_embed_method($embed_html, 'wp');
$embed_transient = array(
'publication_url' => $content,
'attrs' => $a,
'embed_html' => $embed_html
);
set_transient('flippingbook_'.$shortcode_hash, $embed_transient, DAY_IN_SECONDS );
return $embed_html;
} else {
return __('Error embedding FlippingBook shortcode', 'flippingbook');
}
} else {
if ( WP_DEBUG ) {
$error_string = $embed_data->get_error_message();
echo '<div id="message" class="error"><p>' . $error_string . '</p></div>';
}
return __('Error embedding FlippingBook shortcode', 'flippingbook');
}
} else {
return __('FlippingBook shortcode is not correct', 'flippingbook');
}
}
/**
* Add the top level menu page.
*/
function flippingbook_options_page() {
add_menu_page(
__( 'FlippingBook Plugin options', 'flippingbook'),
'FlippingBook',
'manage_options',
'flippingbook',
array( $this, 'flippingbook_options_page_html' ),
plugin_dir_url( __FILE__ ) . 'flippingbook-icon.png'
);
}
/**
* Custom options and settings
*/
function flippingbook_settings_init() {
register_setting( 'flippingbook', 'flippingbook_options' , array (
'sanitize_callback' => array( $this, 'flippingbook_setting_sanitize' )
));
add_settings_section(
'flippingbook_section_oembed',
__( 'FlippingBook oEmbed', 'flippingbook' ), array( $this, 'flippingbook_section_oembed_callback' ),
'flippingbook'
);
// add_settings_section(
// 'flippingbook_section_shortcode',
// __( 'Shortcode', 'flippingbook' ), array( $this, 'flippingbook_section_shortcode_callback' ),
// 'flippingbook'
// );
add_settings_section(
'flippingbook_section_domain',
__( 'Custom domain', 'flippingbook' ), array( $this, 'flippingbook_section_domain_callback' ),
'flippingbook'
);
add_settings_field(
'flippingbook_field_domain',
__( 'Domain name', 'flippingbook' ),
array( $this, 'flippingbook_field_domain_cb' ),
'flippingbook',
'flippingbook_section_domain',
array(
'label_for' => 'custom_domain',
'class' => 'flippingbook_row'
)
);
add_settings_field(
'flippingbook_field_make_oembed_responsive',
__( 'Make oEmbed responsive', 'flippingbook' ),
array( $this, 'flippingbook_field_make_oembed_responsive_cb' ),
'flippingbook',
'flippingbook_section_oembed',
array(
'label_for' => 'responsive_oembed',
'class' => 'flippingbook_row'
)
);
add_settings_field(
'flippingbook_field_default_oembed_ratio',
__( 'oEmbed ratio', 'flippingbook' ),
array( $this, 'flippingbook_field_default_oembed_ratio_cb' ),
'flippingbook',
'flippingbook_section_oembed',
array(
'label_for' => 'oembed_ratio',
'class' => 'flippingbook_row'
)
);
add_settings_field(
'flippingbook_field_clear_oembed_cache',
__( 'Clear oEmbed cache', 'flippingbook' ),
array( $this, 'flippingbook_field_clear_oembed_cache_cb' ),
'flippingbook',
'flippingbook_section_oembed',
array(
'label_for' => 'clear_oembed_cache',
'class' => 'flippingbook_row'
)
);
}
function flippingbook_setting_sanitize( $input = NULL ) {
// custom_domain -- Remove protocol and check domain format
if ( isset( $input['custom_domain'] ) && $input['custom_domain'] !== '') {
$result = preg_replace('/.*\:\/\/?/', '', $input['custom_domain']);
if (!preg_match('/^(?:(?:xn--)?[a-z0-9]+((?:xn--)?-[a-z0-9]+)*\.)+[a-z]{2,}$/', $result)) {
$input['custom_domain'] = get_option( 'flippingbook_options' )['custom_domain'];
add_settings_error(
'flippingbook_messages',
'flippingbook_message',
__( 'Unrecognized domain name format.', 'flippingbook' ),
'error'
);
} else {
$input['custom_domain'] = $result;
}
}
// oembed_ratio -- check format
if ( isset( $input['oembed_ratio'] ) && !empty($input['oembed_ratio'])) {
if (!preg_match('/\d+:\d+/', $input['oembed_ratio'])) {
$input['oembed_ratio'] = get_option( 'flippingbook_options' )['oembed_ratio'];
add_settings_error(
'flippingbook_messages',
'flippingbook_message',
sprintf(__( 'Incorrect ratio format. Please use numbers separated by colon, like %s', 'flippingbook' ), '<kbd>'.$this->default_oembed_ratio.'</kbd>'),
'warning'
);
}
}
// shortcode_cache_timeout -- check type and value
if ( isset( $input['shortcode_cache_timeout'] ) && !empty($input['shortcode_cache_timeout'])) {
if (!preg_match('/^\d+$/', $input['shortcode_cache_timeout'])) {
$input['shortcode_cache_timeout'] = get_option( 'flippingbook_options' )['shortcode_cache_timeout'];
add_settings_error(
'flippingbook_messages',
'flippingbook_message',
__( 'Incorrect shortcode cache timeout format. Please only use numbers.', 'flippingbook' ),
'warning'
);
} elseif ($input['shortcode_cache_timeout'] < $this->minimal_cache_timeout) {
$input['shortcode_cache_timeout'] = get_option( 'flippingbook_options' )['shortcode_cache_timeout'];
add_settings_error(
'flippingbook_messages',
'flippingbook_message',
sprintf(__( 'Minimal shortcode cache timeout value is %s.', 'flippingbook' ), '<kbd>'.$this->minimal_cache_timeout.'</kbd>'),
'warning'
);
}
}
if ( isset( $input['clear_oembed_cache'] ) ) {
global $wpdb;
$count_postmeta = $this->try_clear_flippingbook_oembed_postmeta_cache();
if ( $count_postmeta === false ) {
add_settings_error(
'flippingbook_messages',
'flippingbook_message',
sprintf(__( 'Could not clear the FlippingBook oEmbed postmeta cache. %s', 'flippingbok' ), $wpdb->last_error),
'error'
);
}
$count_transient = $this->try_clear_flippingbook_oembed_transient_cache();
if ( $count_transient === false ) {
add_settings_error(
'flippingbook_messages',
'flippingbook_message',
sprintf(__( 'Could not clear the FlippingBook oEmbed transient cache. %s', 'flippingbok' ), $wpdb->last_error),
'error'
);
}
if ($count_postmeta + $count_transient === 0) {
add_settings_error(
'flippingbook_messages',
'flippingbook_message',
sprintf(__( 'FlippingBook oEmbed cache is already empty.', 'flippingbook' ), $count_postmeta + $count_transient),
'info'
);
} else {
$total_count = $count_postmeta + $count_transient;
add_settings_error(
'flippingbook_messages',
'flippingbook_message',
sprintf(_n( 'Successfully removed %d FlippingBook oEmbed cache entry.', 'Successfully removed %d FlippingBook oEmbed cache entries.', $total_count, 'flippingbook' ), $total_count ),
'success'
);
}
}
return $input;
}
function flippingbook_section_domain_callback( $args ) {
?>
<p id="<?php echo esc_attr( $args['id'] ); ?>">
<?php esc_html_e( 'If you have a Custom Domain set up for your FlippingBook Online account, enter it below to enable oEmbed and the [flippingbook] shortcode support.', 'flippingbook' ); ?>
<br />
<?php esc_html_e( 'You can get more information about custom domains in our ', 'flippingbook' ); ?>
<a href="https://flippingbook.com/help/online/other-features-and-options/branded-urls-in-flippingbook-online"><?php esc_html_e( 'Help Center article', 'flippingbook' ); ?></a>.
</p>
<?php
}
function flippingbook_section_oembed_callback( $args ) {
?>
<p id="<?php echo esc_attr( $args['id'] ); ?>">
<?php esc_html_e( 'Here you can control the FlippingBook Online and FlippingBook Cloud oEmbed settings for the FlippingBook links.', 'flippingbook' ); ?>
</p>
<?php
}
function flippingbook_section_shortcode_callback( $args ) {
?>
<p id="<?php echo esc_attr( $args['id'] ); ?>"><?php esc_html_e( 'Here you can control the [flippingbook] shortcode settings.', 'flippingbook' ); ?></p>
<?php
}
function flippingbook_field_domain_cb( $args ) {
$options = get_option( 'flippingbook_options' );
?>
<input
id="<?php echo esc_attr( $args['label_for'] ); ?>"
name="flippingbook_options[<?php echo esc_attr( $args['label_for'] ); ?>]"
value="<?php echo !empty($options) && !empty($options[ $args['label_for'] ]) ? ($options[ $args['label_for'] ]) : (''); ?>"
size="50"
type="text">
<p class="description">
<?php esc_html_e( 'Enter your domain name without a protocol or a path. For example: ', 'flippingbook' ); ?><kbd>catalogs.your-brand.org</kbd>
</p>
<?php
}
function flippingbook_field_make_oembed_responsive_cb( $args ) {
$options = get_option( 'flippingbook_options' );
$checked = !empty($options[ $args['label_for'] ]) ? 1 : 0;
?>
<input
id="<?php echo esc_attr( $args['label_for'] ); ?>"
name="flippingbook_options[<?php echo esc_attr( $args['label_for'] ); ?>]"
class="responsive-oembed-checkbox"
type="checkbox"
value="1"
<?php checked( 1, $checked, true ) ?>
/>
<p class="description">
<?php esc_html_e( 'Check this box to make FlippingBook oEmbeds responsive — they will fill the container by width and retain the ratio specified in the oEmbed ratio field.', 'flippingbook' ); ?>
</p>
<p class="description">
<?php esc_html_e( 'This setting will apply to all new oEmbeds. You’ll need to clear the oEmbed cache if you’d like to apply the setting to your existing FlippingBook oEmbeds.', 'flippingbook' ); ?>
</p>
<?php
}
function flippingbook_field_default_oembed_ratio_cb( $args ) {
$options = get_option( 'flippingbook_options' );
?>
<input
id="<?php echo esc_attr( $args['label_for'] ); ?>"
name="flippingbook_options[<?php echo esc_attr( $args['label_for'] ); ?>]"
value="<?php echo !empty($options) && !empty($options[ $args['label_for'] ]) ? ($options[ $args['label_for'] ]) : $this->default_oembed_ratio; ?>"
<?php echo empty($options['responsive_oembed']) ? 'disabled' : ''; ?>
size="10"
type="text">
<p class="description">
<?php printf(esc_html__( 'Enter the width/height ratio for your responsive embed. The default value is %s.', 'flippingbook' ), ('<kbd>'.$this->default_oembed_ratio).'</kbd>'); ?>
</p>
<?php
}
function flippingbook_field_clear_oembed_cache_cb( $args ) {
?>
<input
id="<?php echo esc_attr( $args['label_for'] ); ?>"
name="flippingbook_options[<?php echo esc_attr( $args['label_for'] ); ?>]"
class="clear-oembed-cache-checkbox"
type="checkbox"
value="1"
/>
<p class="description">
<?php esc_html_e( 'Check the box to clear FlippingBook oEmbed cache upon saving.', 'flippingbook' ); ?>
</p>
<?php
}
function flippingbook_options_page_html() {
if ( ! current_user_can( 'manage_options' ) ) {
return;
}
if ( isset( $_GET['settings-updated'] ) ) {
add_settings_error( 'flippingbook_messages', 'flippingbook_message', __( 'Settings Saved', 'flippingbook' ), 'updated' );
}
settings_errors( 'flippingbook_messages' );
?>
<div class="wrap">
<h1><?php echo esc_html( get_admin_page_title() ); ?></h1>
<form action="options.php" method="post">
<?php
settings_fields( 'flippingbook' );
do_settings_sections( 'flippingbook' );
submit_button( 'Save Settings' );
?>
</form>
</div>
<script type="text/javascript">
var ratioCheckbox = document.getElementById('responsive_oembed');
var ratioField = document.getElementById('oembed_ratio');
if (ratioCheckbox && ratioField) {
ratioCheckbox.addEventListener('change', function() {
if (ratioCheckbox.checked) {
ratioField.removeAttribute('disabled');
} else {
ratioField.setAttribute('disabled', '');
}
});
}
</script>
<?php
}
function try_clear_flippingbook_oembed_postmeta_cache() {
if (is_user_logged_in() && current_user_can('manage_options')){
global $wpdb;
$delres = $wpdb->query("DELETE FROM $wpdb->postmeta WHERE meta_key LIKE '%_oembed_%' AND (meta_value LIKE '%fbo-embed%' OR meta_value LIKE '%fbc-embed%')");
return $delres;
}
else return false;
}
function try_clear_flippingbook_oembed_transient_cache() {
if (is_user_logged_in() && current_user_can('manage_options')){
global $wpdb;
$delres = $wpdb->query("DELETE FROM $wpdb->options WHERE option_name LIKE '%_transient_oembed_%' AND (option_value LIKE '%fbo-embed%' OR option_value LIKE '%fbc-embed%')");
return $delres;
}
else return false;
}
}
$flippingbook = new Flippingbook();
?>