felixarntz/global-admin

<?php
/**
 * Edit user global administration panel.
 *
 * @package WPGlobalAdmin
 * @since 1.0.0
 */

/** Load WordPress Administration Bootstrap */
require_once( dirname( __FILE__ ) . '/admin.php' );

if ( ! is_multinetwork() ) {
    wp_die( __( 'Multinetwork support is not enabled.', 'wp-global-admin' ) );
}

/**
 * Handles changes to the global administrator privileges of a user.
 *
 * @since 1.0.0
 * @access private
 *
 * @param int $user_id ID of the user that is being edited.
 */
function _ga_maybe_modify_global_administrator_setting( $user_id ) {
    if ( is_multinetwork() && is_global_admin() && ! IS_PROFILE_PAGE && current_user_can( 'manage_global_options' ) ) {
        $global_administrators = get_global_option( 'global_administrators', array() );
        $user                  = get_userdata( $user_id );

        if ( ! empty( $_POST['global_administrator'] ) ) {
            if ( ! in_array( $user->user_login, $global_administrators, true ) ) {
                $global_administrators[] = $user->user_login;
                update_global_option( 'global_administrators', $global_administrators );

                /**
                 * Fires after a user has been granted global administrator privileges.
                 *
                 * @since 1.0.0
                 *
                 * @param int $user_id User ID.
                 */
                do_action( 'granted_global_administrator', $user->ID );
            }
        } else {
            $key = array_search( $user->user_login, $global_administrators, true );
            if ( false !== $key ) {
                array_splice( $global_administrators, $key, 1 );
                update_global_option( 'global_administrators', $global_administrators );

                /**
                 * Fires after a user's global administrator privileges have been revoked.
                 *
                 * @since 1.0.0
                 *
                 * @param int $user_id User ID.
                 */
                do_action( 'revoked_global_administrator', $user->ID );
            }
        }
    }
}
add_action( 'personal_options_update', '_ga_maybe_modify_global_administrator_setting', 10, 1 );
add_action( 'edit_user_profile_update', '_ga_maybe_modify_global_administrator_setting', 10, 1 );

/**
 * Displays a checkbox to grant or revoke global administrator privileges.
 *
 * This function MUST be hooked into 'personal_options' as its HTML will only be valid there.
 *
 * @since 1.0.0
 * @access private
 *
 * @param WP_User $user User that is being edited.
 */
function _ga_maybe_display_global_administrator_checkbox( $user ) {
    if ( is_multinetwork() && is_global_admin() && ! IS_PROFILE_PAGE && current_user_can( 'manage_global_options' ) ) {
        ?>
        </table>

        <style type="text/css">
            .user-role-wrap {
                display: none;
            }
        </style>

        <h2><?php _e( 'Permissions', 'wp-global-admin' ); ?></h2>

        <table class="form-table">
            <tr class="user-global-admin-wrap">
                <th>
                    <?php _e( 'Global Administrator', 'wp-global-admin' ); ?>
                </th>
                <td>
                    <?php if ( $user->user_email != get_global_option( 'admin_email' ) || ! is_global_administrator( $user->ID ) ) : ?>
                        <p><label><input type="checkbox" id="global_administrator" name="global_administrator"<?php checked( is_global_administrator( $user->ID ) ); ?> /> <?php _e( 'Grant this user global administrator privileges.', 'wp-global-admin' ); ?></label></p>
                    <?php else : ?>
                        <p><?php _e( 'Global administrator privileges cannot be removed because this user has the global admin email.', 'wp-global-admin' ); ?></p>
                    <?php endif; ?>
                </td>
            </tr>
        <?php
    }
}
add_action( 'personal_options', '_ga_maybe_display_global_administrator_checkbox', 9999, 1 );

require( ABSPATH . 'wp-admin/user-edit.php' );