/**

* Static property to hold our singleton instance.

*

* @var GP_Pro_Export_CSS

*/

public static $instance = false;

/**

* This is our constructor.

*/

private function __construct() {

// General backend.

add_action( 'plugins_loaded', array( $this, 'textdomain' ) );

add_action( 'admin_init', array( $this, 'export_css_file' ) );

add_action( 'admin_notices', array( $this, 'gppro_active_check' ), 10 );

add_action( 'admin_notices', array( $this, 'export_css_notices' ) );

add_action( 'admin_head', array( $this, 'export_css_style' ) );

// GP Pro specific.

add_filter( 'dpp_settings', array( $this, 'export_css_section' ), 15, 2 );

}

/**

* If an instance exists, this returns it. If not, it creates one and returns it.

*

* @return GP_Pro_Export_CSS

*/

public static function get_instance() {

if ( ! self::$instance ) {

self::$instance = new self();

}

return self::$instance;

}

/**

* Load textdomain.

*/

public function textdomain() {

load_plugin_textdomain( 'gppro-export-css', false, dirname( plugin_basename( __FILE__ ) ) . '/languages/' );

}

/**

* Check for GP Pro being active.

*/

public function gppro_active_check() {

// Get the current screen.

$screen = get_current_screen();

// Bail if not on the plugins page.

if ( is_object( $screen ) && 'plugins.php' !== $screen->parent_file ) {

return;

}

// Run the active check.

$coreactive = class_exists( 'Genesis_Palette_Pro' ) ? Genesis_Palette_Pro::check_active() : false;

// Active. Bail.

if ( $coreactive ) {

return;

}

// Not active. Show message.

echo '<div id="message" class="error fade below-h2"><p><strong>' . esc_html__( 'This plugin requires Genesis Design Palette Pro to function and cannot be activated.', 'gppro-export-css' ) . '</strong></p></div>';

// Hide activation method.

unset( $_GET['activate'] ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended,

// Deactivate the plugin.

deactivate_plugins( plugin_basename( __FILE__ ) );

}

/**

* Add CSS to the admin head.

*/

public function export_css_style() {

// Fetch current screen.

$screen = get_current_screen();

// Display our admin UI CSS if on DPP page.

if ( is_object( $screen ) && 'genesis_page_genesis-palette-pro' === $screen->base ) {

echo '<style media="all" type="text/css">';

echo 'a.gppro-css-export-view{display:inline-block;margin-left:5px;text-decoration:none;}';

echo '</style>';

}

}

/**

* Display messages if export failure.

*/

public function export_css_notices() {

// First check to make sure we're on our settings.

if ( ! isset( $_GET['page'] ) || isset( $_GET['page'] ) && 'genesis-palette-pro' !== $_GET['page'] ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended,

return;

}

// Check our CSS export action.

if ( ! isset( $_GET['export-css'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended,

return;

}

// Check for non failure.

if ( isset( $_GET['export-css'] ) && 'failure' !== $_GET['export-css'] ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended,

return;

}

// Check for failure.

if ( isset( $_GET['export-css'] ) && 'failure' === $_GET['export-css'] ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended,

$reason = isset( $_GET['reason'] ) ? sanitize_text_field( wp_unslash( $_GET['reason'] ) ) : ''; // phpcs:ignore WordPress.Security.NonceVerification.Recommended,

switch ( $reason ) {

case 'noclass':

$message = __( 'The main Genesis Design Palette Pro files are not present.', 'gppro-export-css' );

break;

case 'nodata':

$message = __( 'No settings data has been saved. Please save your settings and try again.', 'gppro-export-css' );

break;

case 'nofile':

$message = __( 'No settings data has been saved. Please save your settings and try again.', 'gppro-export-css' );

break;

default:

$message = __( 'There was an error with your export. Please try again later.', 'gppro-export-css' );

}

// Return the message.

echo '<div id="message" class="error">';

echo '<p>' . esc_attr( $message ) . '</p>';

echo '</div>';

}

}

/**

* Export our CSS file.

*

* @return mixed

*/

public function export_css_file() {

// Check nonce.

if ( empty( $_GET['_wpnonce'] ) || ! wp_verify_nonce( $_GET['_wpnonce'], 'gppro_css_export_nonce' ) ) { // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized, WordPress.Security.ValidatedSanitizedInput.MissingUnslash

return;

}

// Check page and query string.

if ( ! isset( $_GET['gppro-css-export'] ) || isset( $_GET['gppro-css-export'] ) && 'go' !== $_GET['gppro-css-export'] ) {

return;

}

// Get current settings.

$current = get_option( 'gppro-settings' );

// If settings empty, bail.

if ( empty( $current ) ) {

$failure = menu_page_url( 'genesis-palette-pro', 0 ) . '&section=build_settings&export-css=failure&reason=nodata';

wp_safe_redirect( $failure );

return;

}

// Check for class.

if ( ! class_exists( 'Genesis_Palette_Pro' ) ) {

$failure = menu_page_url( 'genesis-palette-pro', 0 ) . '&section=build_settings&export-css=failure&reason=noclass';

wp_safe_redirect( $failure );

return;

}

$output = get_theme_mod( 'dpp_styles' );

if ( empty( $output ) ) {

$failure = menu_page_url( 'genesis-palette-pro', 0 ) . '&section=build_settings&export-css=failure&reason=nofile';

wp_safe_redirect( esc_url( $failure ) );

return;

}

// Prepare and send the export file to the browser.

header( 'Content-Description: File Transfer' );

header( 'Cache-Control: public, must-revalidate' );

header( 'Pragma: hack' );

header( 'Content-type: text/css; charset=utf-8' );

header( 'Content-Disposition: attachment; filename="gppro-custom.css"' );

header( 'Content-Length: ' . mb_strlen( $output ) );

echo $this->escape_css( $output ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped

exit();

}

/**

* Take the CSS data stored in the settings row and escape it for proper output.

*

* @param string $data the sanitized CSS data stored.

*

* @return string $data the escaped and encoded CSS data to output.

*/

public function escape_css( $data = '' ) {

// Convert single quotes to double quotes.

$data = str_replace( '\'', '"', $data );

// Escape it.

$data = esc_attr( $data );

// Now decode it.

$data = html_entity_decode( $data );

// And return it, filtered.

return apply_filters( 'gppro_export_css_escaped', $data );

}

/**

* Add new option for exporting CSS.

*

* @param array $settings The DPP settings array.

* @return array

*/

public function export_css_section( $settings ) {

$settings['gppro-export-css'] = array(

'label' => __( 'Export Raw CSS', 'gppro-export-css' ),

'section' => 'utilities',

'callback' => array( $this, 'export_css_input' ),

);

return $settings;

}

/**

* Create input field for CSS export.

*/

public function export_css_input() {

// First check for the data.

$saved = get_option( 'gppro-settings' );

// Display message without saved options.

if ( empty( $saved ) ) {

$text = __( 'No data has been saved. Please save your settings before attempting to export.', 'gppro-export-css' );

echo '<div class="gppro-input gppro-description-input"><p class="description">' . esc_attr( $text ) . '</p></div>';

}

// Get my values.

$id = 'gppro-export-css';

$name = 'gppro-export-css';

$button = __( 'Export File', 'gppro-export-css' );

// Get CSS file for link.

$file_key = get_theme_mod( 'dpp_file_key' );

// Create export URL with nonce.

$expnonce = wp_create_nonce( 'gppro_css_export_nonce' );

// Set the empty.

$input = '';

// Begin markup.

$input .= '<div class="gppro-input gppro-css-export-input gppro-setting-input">';

// Handle browser link.

if ( ! empty( $file_key ) ) {

// Handle label with optional CSS file link.

$input .= '<div class="gppro-input-item gppro-input-wrap"><p class="description">';

$input .= esc_html__( 'View CSS file', 'gppro-export-css' );

$url = sprintf( '%1$sdpp-custom-styles-%2$s', trailingslashit( get_site_url() ), $file_key );

$input .= '<a class="gppro-css-export-view" href="' . esc_url( $url ) . '" title="' . __( 'View in browser', 'gppro-export-css' ) . '" target="_blank">';

$input .= '<i class="dashicons dashicons-admin-site"></i>';

$input .= '</a>';

$input .= '</p></div>';

}

// Display button.

$input .= '<div class="gppro-input-item gppro-input-label choice-label">';

$input .= '<span class="gppro-settings-button">';

$input .= '<a name="' . esc_attr( $name ) . '" id="' . sanitize_html_class( $id ) . '" href="' . menu_page_url( 'genesis-palette-pro', 0 ) . '&gppro-css-export=go&_wpnonce=' . $expnonce . '" class="button-primary button-small">' . $button . '</a>';

$input .= '</span>';

$input .= '</div>';

// Close markup.

$input .= '</div>';

// Send it back.

echo $input; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped

}

// End class.