# Shared functions of the Das OS helpers (dsv, duser, dfw, dsys).
# Sourced, not run: each helper sets "set -euo pipefail" itself.
# shellcheck shell=bash

self=${0##*/}

if [[ ${LC_ALL:-} == uk* || ${LC_MESSAGES:-} == uk* || ${LANG:-} == uk* ]]; then
  uk=1
else
  uk=""
fi

# say UKRAINIAN ENGLISH: prints the message in the user's language
say() {
  if [[ -n $uk ]]; then echo "$1"; else echo "$2"; fi
}

warn() {
  say "$self: $1" "$self: $2" >&2
}

die() {
  warn "$1" "$2"
  exit 1
}

# need_root ARGS...: runs the helper again through sudo with the same arguments
need_root() {
  if [[ $EUID -ne 0 ]]; then
    exec sudo "$0" "$@"
  fi
}

# Questions are only asked on a terminal; scripts must pass every argument
interactive() {
  [[ -t 0 ]]
}

# ask VAR UKRAINIAN ENGLISH [DEFAULT]: reads a line into VAR; the prompt shows
# the default, which an empty answer keeps
ask() {
  local -n _answer=$1
  local prompt
  prompt=$(say "$2" "$3")
  if [[ -n ${4:-} ]]; then
    prompt+=" [$4]"
  fi
  read -r -e -p "$prompt: " _answer || exit 1
  [[ -n $_answer ]] || _answer=${4:-}
}

# confirm UKRAINIAN ENGLISH: a yes/no question, "no" by default
confirm() {
  local reply
  read -r -p "$(say "$1 [т/Н]" "$2 [y/N]") " reply || return 1
  [[ ${reply,,} == @(y|yes|т|так) ]]
}

# pad TEXT WIDTH: TEXT padded with spaces to WIDTH characters. printf pads by
# bytes, ${#s} counts characters, so Cyrillic columns stay aligned.
pad() {
  local width=$(($2 - ${#1}))
  ((width > 0)) || width=0
  printf '%s%*s ' "$1" "$width" ''
}

# set_rc VAR VALUE: sets VAR in /etc/rc.conf, uncommenting Void's example line
set_rc() {
  local rc=${RC_CONF:-/etc/rc.conf}
  if grep -q "^#\?$1=" "$rc"; then
    sed -i "s|^#\?$1=.*|$1=\"$2\"|" "$rc"
  else
    echo "$1=\"$2\"" >>"$rc"
  fi
}