WPCOM_VIP_Support_User::action_admin_notices PHP Method

    public function action_admin_notices()
    {
        $error_html = false;
        $message_html = false;
        $screen = get_current_screen();
        // Messages on the users list screen
        if (in_array($screen->base, array('users', 'user-edit', 'profile'))) {
            $update = false;
            if (isset($_GET['update'])) {
                $update = $_GET['update'];
            }
            switch ($update) {
                case self::MSG_BLOCK_UPGRADE_NON_A11N:
                    $error_html = __('Only users with a recognised Automattic email address can be assigned the VIP Support role.', 'vip-support');
                    break;
                case self::MSG_BLOCK_UPGRADE_VERIFY_EMAIL:
                case self::MSG_MADE_VIP:
                    $error_html = __('This user’s Automattic email address must be verified before they can be assigned the VIP Support role.', 'vip-support');
                    break;
                case self::MSG_BLOCK_NEW_NON_VIP_USER:
                    $error_html = __('Only Automattic staff can be assigned the VIP Support role, the new user has been made a "subscriber".', 'vip-support');
                    break;
                case self::MSG_BLOCK_DOWNGRADE:
                    $error_html = __('VIP Support users can only be assigned the VIP Support role, or deleted.', 'vip-support');
                    break;
                case self::MSG_DOWNGRADE_VIP_USER:
                    $error_html = __('This user’s email address has changed, and as a result they are no longer in the VIP Support role. Once the user has verified their new email address they will have the VIP Support role restored.', 'vip-support');
                    break;
                default:
                    break;
            }
        }
        // Messages on the user's own profile edit screen
        if ('profile' == $screen->base) {
            if (isset($_GET[self::GET_TRIGGER_RESEND_VERIFICATION]) && $_GET[self::GET_TRIGGER_RESEND_VERIFICATION]) {
                $message_html = __('The verification email has been sent, please check your inbox. Delivery may take a few minutes.', 'vip-support');
            } else {
                $user_id = get_current_user_id();
                $user = get_user_by('id', $user_id);
                $resend_link = $this->get_trigger_resend_verification_url();
                if ($this->is_a8c_email($user->user_email) && !$this->user_has_verified_email($user->ID)) {
                    $error_html = sprintf(__('Your Automattic email address is not verified, <a href="%s">re-send verification email</a>.', 'vip-support'), esc_url($resend_link));
                }
            }
        }
        // Messages on the user edit screen for another user
        if ('user-edit' == $screen->base) {
            if (isset($_GET[self::GET_TRIGGER_RESEND_VERIFICATION]) && $_GET[self::GET_TRIGGER_RESEND_VERIFICATION]) {
                $message_html = __('The verification email has been sent, please ask the user to check their inbox. Delivery may take a few minutes.', 'vip-support');
            } else {
                $user_id = absint($_GET['user_id']);
                $user = get_user_by('id', $user_id);
                $resend_link = $this->get_trigger_resend_verification_url();
                if ($this->is_a8c_email($user->user_email) && !$this->user_has_verified_email($user->ID) && $this->user_has_vip_support_role($user->ID)) {
                    $error_html = sprintf(__('This user’s Automattic email address is not verified, <a href="%s">re-send verification email</a>.', 'vip-support'), esc_url($resend_link));
                }
            }
        }
        // For is-dismissible see https://make.wordpress.org/core/2015/04/23/spinners-and-dismissible-admin-notices-in-4-2/
        if ($error_html) {
            echo '<div id="message" class="notice is-dismissible error"><p>' . $error_html . '</p></div>';
        }
        if ($message_html) {
            echo '<div id="message" class="notice is-dismissible updated"><p>' . $message_html . '</p></div>';
        }
    }