wp_ajax_wp_privacy_erase_personal_data

function wp_ajax_wp_privacy_erase_personal_data() {

	if ( empty( $_POST['id'] ) ) {
		wp_send_json_error( __( 'Missing request ID.' ) );
	}

	$request_id = (int) $_POST['id'];

	if ( $request_id < 1 ) {
		wp_send_json_error( __( 'Invalid request ID.' ) );
	}

	// Both capabilities are required to avoid confusion, see `_wp_personal_data_removal_page()`.
	if ( ! current_user_can( 'erase_others_personal_data' ) || ! current_user_can( 'delete_users' ) ) {
		wp_send_json_error( __( 'Sorry, you are not allowed to perform this action.' ) );
	}

	check_ajax_referer( 'wp-privacy-erase-personal-data-' . $request_id, 'security' );

	// Get the request.
	$request = wp_get_user_request( $request_id );

	if ( ! $request || 'remove_personal_data' !== $request->action_name ) {
		wp_send_json_error( __( 'Invalid request type.' ) );
	}

	$email_address = $request->email;

	if ( ! is_email( $email_address ) ) {
		wp_send_json_error( __( 'Invalid email address in request.' ) );
	}

	if ( ! isset( $_POST['eraser'] ) ) {
		wp_send_json_error( __( 'Missing eraser index.' ) );
	}

	$eraser_index = (int) $_POST['eraser'];

	if ( ! isset( $_POST['page'] ) ) {
		wp_send_json_error( __( 'Missing page index.' ) );
	}

	$page = (int) $_POST['page'];

	/**
	 * Filters the array of personal data eraser callbacks.
	 *
	 * @since 4.9.6
	 *
	 * @param array $args {
	 *     An array of callable erasers of personal data. Default empty array.
	 *
	 *     @type array ...$0 {
	 *         Array of personal data exporters.
	 *
	 *         @type callable $callback               Callable eraser that accepts an email address and
	 *                                                a page and returns an array with boolean values for
	 *                                                whether items were removed or retained and any messages
	 *                                                from the eraser, as well as if additional pages are
	 *                                                available.
	 *         @type string   $exporter_friendly_name Translated user facing friendly name for the eraser.
	 *     }
	 * }
	 */
	$erasers = apply_filters( 'wp_privacy_personal_data_erasers', array() );

	// Do we have any registered erasers?
	if ( 0 < count( $erasers ) ) {

		if ( $eraser_index < 1 ) {
			wp_send_json_error( __( 'Eraser index cannot be less than one.' ) );
		}

		if ( $eraser_index > count( $erasers ) ) {
			wp_send_json_error( __( 'Eraser index is out of range.' ) );
		}

		if ( $page < 1 ) {
			wp_send_json_error( __( 'Page index cannot be less than one.' ) );
		}

		$eraser_keys = array_keys( $erasers );
		$eraser_key  = $eraser_keys[ $eraser_index - 1 ];
		$eraser      = $erasers[ $eraser_key ];

		if ( ! is_array( $eraser ) ) {
			/* translators: %d: Eraser array index. */
			wp_send_json_error( sprintf( __( 'Expected an array describing the eraser at index %d.' ), $eraser_index ) );
		}

		if ( ! array_key_exists( 'eraser_friendly_name', $eraser ) ) {
			/* translators: %d: Eraser array index. */
			wp_send_json_error( sprintf( __( 'Eraser array at index %d does not include a friendly name.' ), $eraser_index ) );
		}

		$eraser_friendly_name = $eraser['eraser_friendly_name'];

		if ( ! array_key_exists( 'callback', $eraser ) ) {
			wp_send_json_error(
				sprintf(
					/* translators: %s: Eraser friendly name. */
					__( 'Eraser does not include a callback: %s.' ),
					esc_html( $eraser_friendly_name )
				)
			);
		}

		if ( ! is_callable( $eraser['callback'] ) ) {
			wp_send_json_error(
				sprintf(
					/* translators: %s: Eraser friendly name. */
					__( 'Eraser callback is not valid: %s.' ),
					esc_html( $eraser_friendly_name )
				)
			);
		}

		$callback = $eraser['callback'];
		$response = call_user_func( $callback, $email_address, $page );

		if ( is_wp_error( $response ) ) {
			wp_send_json_error( $response );
		}

		if ( ! is_array( $response ) ) {
			wp_send_json_error(
				sprintf(
					/* translators: 1: Eraser friendly name, 2: Eraser array index. */
					__( 'Did not receive array from %1$s eraser (index %2$d).' ),
					esc_html( $eraser_friendly_name ),
					$eraser_index
				)
			);
		}

		if ( ! array_key_exists( 'items_removed', $response ) ) {
			wp_send_json_error(
				sprintf(
					/* translators: 1: Eraser friendly name, 2: Eraser array index. */
					__( 'Expected items_removed key in response array from %1$s eraser (index %2$d).' ),
					esc_html( $eraser_friendly_name ),
					$eraser_index
				)
			);
		}

		if ( ! array_key_exists( 'items_retained', $response ) ) {
			wp_send_json_error(
				sprintf(
					/* translators: 1: Eraser friendly name, 2: Eraser array index. */
					__( 'Expected items_retained key in response array from %1$s eraser (index %2$d).' ),
					esc_html( $eraser_friendly_name ),
					$eraser_index
				)
			);
		}

		if ( ! array_key_exists( 'messages', $response ) ) {
			wp_send_json_error(
				sprintf(
					/* translators: 1: Eraser friendly name, 2: Eraser array index. */
					__( 'Expected messages key in response array from %1$s eraser (index %2$d).' ),
					esc_html( $eraser_friendly_name ),
					$eraser_index
				)
			);
		}

		if ( ! is_array( $response['messages'] ) ) {
			wp_send_json_error(
				sprintf(
					/* translators: 1: Eraser friendly name, 2: Eraser array index. */
					__( 'Expected messages key to reference an array in response array from %1$s eraser (index %2$d).' ),
					esc_html( $eraser_friendly_name ),
					$eraser_index
				)
			);
		}

		if ( ! array_key_exists( 'done', $response ) ) {
			wp_send_json_error(
				sprintf(
					/* translators: 1: Eraser friendly name, 2: Eraser array index. */
					__( 'Expected done flag in response array from %1$s eraser (index %2$d).' ),
					esc_html( $eraser_friendly_name ),
					$eraser_index
				)
			);
		}
	} else {
		// No erasers, so we're done.
		$eraser_key = '';

		$response = array(
			'items_removed'  => false,
			'items_retained' => false,
			'messages'       => array(),
			'done'           => true,
		);
	}

	/**
	 * Filters a page of personal data eraser data.
	 *
	 * Allows the erasure response to be consumed by destinations in addition to Ajax.
	 *
	 * @since 4.9.6
	 *
	 * @param array  $response        The personal data for the given exporter and page.
	 * @param int    $eraser_index    The index of the eraser that provided this data.
	 * @param string $email_address   The email address associated with this personal data.
	 * @param int    $page            The page for this response.
	 * @param int    $request_id      The privacy request post ID associated with this request.
	 * @param string $eraser_key      The key (slug) of the eraser that provided this data.
	 */
	$response = apply_filters( 'wp_privacy_personal_data_erasure_page', $response, $eraser_index, $email_address, $page, $request_id, $eraser_key );

	if ( is_wp_error( $response ) ) {
		wp_send_json_error( $response );
	}

	wp_send_json_success( $response );
}