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* Upgrader API: Bulk_Upgrader_Skin class
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* Generic Bulk Upgrader Skin for WordPress Upgrades.
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* @since 4.6.0 Moved to its own file from wp-admin/includes/class-wp-upgrader-skins.php.
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* @see WP_Upgrader_Skin
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class Bulk_Upgrader_Skin extends WP_Upgrader_Skin {
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public $in_loop = false;
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public $error = false;
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public function __construct($args = array()) {
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$defaults = array( 'url' => '', 'nonce' => '' );
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$args = wp_parse_args($args, $defaults);
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parent::__construct($args);
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public function add_strings() {
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$this->upgrader->strings['skin_upgrade_start'] = __('The update process is starting. This process may take a while on some hosts, so please be patient.');
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/* translators: 1: Title of an update, 2: Error message */
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$this->upgrader->strings['skin_update_failed_error'] = __('An error occurred while updating %1$s: %2$s');
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/* translators: 1: Title of an update */
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$this->upgrader->strings['skin_update_failed'] = __('The update of %1$s failed.');
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/* translators: 1: Title of an update */
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$this->upgrader->strings['skin_update_successful'] = __( '%1$s updated successfully.' ) . ' <a onclick="%2$s" href="#" class="hide-if-no-js"><span>' . __( 'Show Details' ) . '</span><span class="hidden">' . __( 'Hide Details' ) . '</span></a>';
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$this->upgrader->strings['skin_upgrade_end'] = __('All updates have been completed.');
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* @param string $string
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public function feedback($string) {
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if ( isset( $this->upgrader->strings[$string] ) )
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$string = $this->upgrader->strings[$string];
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if ( strpos($string, '%') !== false ) {
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$args = func_get_args();
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$args = array_splice($args, 1);
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$args = array_map( 'strip_tags', $args );
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$args = array_map( 'esc_html', $args );
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$string = vsprintf($string, $args);
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echo "$string<br />\n";
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echo "<p>$string</p>\n";
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public function header() {
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// Nothing, This will be displayed within a iframe.
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public function footer() {
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// Nothing, This will be displayed within a iframe.
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* @param string|WP_Error $error
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public function error($error) {
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if ( is_string($error) && isset( $this->upgrader->strings[$error] ) )
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$this->error = $this->upgrader->strings[$error];
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if ( is_wp_error($error) ) {
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foreach ( $error->get_error_messages() as $emessage ) {
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if ( $error->get_error_data() && is_string( $error->get_error_data() ) )
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$messages[] = $emessage . ' ' . esc_html( strip_tags( $error->get_error_data() ) );
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$messages[] = $emessage;
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$this->error = implode(', ', $messages);
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echo '<script type="text/javascript">jQuery(\'.waiting-' . esc_js($this->upgrader->update_current) . '\').hide();</script>';
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public function bulk_header() {
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$this->feedback('skin_upgrade_start');
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public function bulk_footer() {
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$this->feedback('skin_upgrade_end');
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* @param string $title
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public function before($title = '') {
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$this->in_loop = true;
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printf( '<h2>' . $this->upgrader->strings['skin_before_update_header'] . ' <span class="spinner waiting-' . $this->upgrader->update_current . '"></span></h2>', $title, $this->upgrader->update_current, $this->upgrader->update_count );
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echo '<script type="text/javascript">jQuery(\'.waiting-' . esc_js($this->upgrader->update_current) . '\').css("display", "inline-block");</script>';
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echo '<div class="update-messages hide-if-js" id="progress-' . esc_attr($this->upgrader->update_current) . '"><p>';
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$this->flush_output();
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* @param string $title
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public function after($title = '') {
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if ( $this->error || ! $this->result ) {
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if ( $this->error ) {
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echo '<div class="error"><p>' . sprintf($this->upgrader->strings['skin_update_failed_error'], $title, '<strong>' . $this->error . '</strong>' ) . '</p></div>';
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echo '<div class="error"><p>' . sprintf($this->upgrader->strings['skin_update_failed'], $title) . '</p></div>';
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echo '<script type="text/javascript">jQuery(\'#progress-' . esc_js($this->upgrader->update_current) . '\').show();</script>';
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if ( $this->result && ! is_wp_error( $this->result ) ) {
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if ( ! $this->error )
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echo '<div class="updated"><p>' . sprintf($this->upgrader->strings['skin_update_successful'], $title, 'jQuery(\'#progress-' . esc_js($this->upgrader->update_current) . '\').toggle();jQuery(\'span\', this).toggle(); return false;') . '</p></div>';
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echo '<script type="text/javascript">jQuery(\'.waiting-' . esc_js($this->upgrader->update_current) . '\').hide();</script>';
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$this->flush_output();
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public function reset() {
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$this->in_loop = false;
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$this->error = false;
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public function flush_output() {
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wp_ob_end_flush_all();