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<?php |
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/** |
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* Json Ld — the site's schema.org structured data, printed in `<head>`. |
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* |
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* The website build writes the site's JSON-LD blocks (Organization, plus |
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* LocalBusiness when the brief states an address) as one JSON string to |
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* `zip_ai_jsonld` over `/wp/v2/settings`; every front-end page prints it once |
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* as `<script type="application/ld+json">`. The option holds only JSON-LD: |
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* any other value is stored as '' and prints nothing. |
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* |
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* @since 0.0.11 |
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* @package zip-ai |
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*/ |
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|
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namespace ZipAI\MCP\Classes\Core; |
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|
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if ( ! defined( 'ABSPATH' ) ) { |
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exit; |
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} |
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|
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/** |
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* Registers and prints the JSON-LD option — see the file header. |
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*/ |
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class Json_Ld { |
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|
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/** |
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* The JSON-LD blocks, as the JSON string the build wrote. |
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* |
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* @var string |
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*/ |
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const OPTION_KEY = 'zip_ai_jsonld'; |
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|
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/** |
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* Hook registration. |
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*/ |
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public static function init(): void { |
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add_action( 'init', array( __CLASS__, 'register_contract' ) ); |
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add_action( 'wp_head', array( __CLASS__, 'print_script' ) ); |
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} |
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|
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/** |
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* Register the option for REST writes (`/wp/v2/settings`, manage_options). |
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* |
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* The group is the plugin's own, which no admin form posts: wp-admin/options.php |
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* writes null to every option of the posted group the form did not send, so |
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* under 'general' a Settings > General save would erase the build's JSON-LD. |
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*/ |
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public static function register_contract(): void { |
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register_setting( |
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'zip_ai', |
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self::OPTION_KEY, |
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array( |
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'type' => 'string', |
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'show_in_rest' => true, |
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'default' => '', |
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'sanitize_callback' => array( __CLASS__, 'sanitize' ), |
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) |
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); |
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} |
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|
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/** |
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* Keep the value only when it is JSON-LD. |
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* |
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* @param mixed $value The submitted value. |
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* @return string The value unchanged, or '' when it is not JSON-LD. |
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*/ |
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public static function sanitize( $value ): string { |
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return is_string( $value ) && null !== self::decode( $value ) ? $value : ''; |
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} |
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|
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/** |
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* `wp_head`: print the stored blocks, re-encoded from their decoded value. |
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*/ |
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public static function print_script(): void { |
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$data = self::decode( get_option( self::OPTION_KEY, '' ) ); |
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if ( null === $data ) { |
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return; |
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} |
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$json = wp_json_encode( $data, JSON_UNESCAPED_SLASHES | JSON_HEX_TAG | JSON_HEX_AMP ); |
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if ( false === $json ) { |
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return; |
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} |
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wp_print_inline_script_tag( $json, array( 'type' => 'application/ld+json' ) ); |
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} |
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|
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/** |
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* Decode a JSON-LD document: one object carrying `@context`, or a non-empty |
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* list of such objects. |
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* |
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* @param mixed $value The stored or submitted value. |
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* @return \stdClass|array<int,\stdClass>|null The decoded document, or null when it is not JSON-LD. |
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*/ |
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private static function decode( $value ) { |
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if ( ! is_string( $value ) || '' === $value ) { |
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return null; |
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} |
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$data = json_decode( $value ); |
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$blocks = array(); |
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foreach ( is_array( $data ) ? $data : array( $data ) as $block ) { |
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if ( ! $block instanceof \stdClass || ! property_exists( $block, '@context' ) ) { |
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return null; |
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} |
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$blocks[] = $block; |
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} |
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if ( array() === $blocks ) { |
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return null; |
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} |
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return $data instanceof \stdClass ? $data : $blocks; |
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} |
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} |
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|
