#!/bin/bash
# SPDX-Version: 3.0
# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
# SPDX-FileType: SOURCE
# SPDX-License-Identifier: LicenseRef-CNCL-1.1 OR LicenseRef-CCLA-1.1
# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
# SPDX-PackageName: CISS.debian.live.builder
# SPDX-Security-Contact: security@coresecret.eu

guard_sourcing || return "${ERR_GUARD_SRCE}"

#######################################
# Set up a gauge Dialog Wrapper.
# Globals:
#   PID_BOOT_SCREEN
#   PIPE_BOOT_SCREEN
# Arguments:
#   None
# Returns:
#   0: on success
#######################################
boot_screen() {
  clear
  declare -gr PIPE_BOOT_SCREEN="/tmp/progress.fifo"
  [[ -p "${PIPE_BOOT_SCREEN}" ]] || mkfifo "${PIPE_BOOT_SCREEN}"

  setsid dialog --no-collapse \
                --ascii-lines \
                --keep-tite \
                --title "CISS.debian.live.builder" \
                --gauge "Starting initialization..." \
                10 70 0 \
                < "${PIPE_BOOT_SCREEN}" &
  declare -gr PID_BOOT_SCREEN="$!"
  exec 3> "${PIPE_BOOT_SCREEN}"

  return 0
}
### Prevents accidental 'unset -f'.
# shellcheck disable=SC2034
readonly -f boot_screen

#######################################
# Boot Screen Terminal Cleaner
# Globals:
#   PID_BOOT_SCREEN
#   PIPE_BOOT_SCREEN
# Arguments:
#   None
# Returns:
#   0: on success
#######################################
boot_screen_cleaner() {
  exec 3>&-
  kill -TERM -- -"${PID_BOOT_SCREEN}" 2>/dev/null || true
  wait "${PID_BOOT_SCREEN}" 2>/dev/null || true
  rm -f "${PIPE_BOOT_SCREEN}"
  clean_screen
  sleep 1
  return 0
}
### Prevents accidental 'unset -f'.
# shellcheck disable=SC2034
readonly -f boot_screen_cleaner
# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
