#!/bin/bash

# Load debconf stuff
. /usr/share/debconf/confmodule

# Load nase funkcije
. /usr/share/carnet-upgrade/data.sh
. /usr/share/carnet-upgrade/messages.sh
. /usr/share/carnet-upgrade/functions.sh

# provjeri da li su paketi iz prvog polja instalirani i to strpaj u debconf
cs_preupgrade () {
  local services i

  for i in $(echo "$services_to_check" | sed 's/		*/	/g'| awk -F'	' '{print $1}')
  do
    if pkg $i; then
      if ! echo $services | grep -q $i; then
        services="$services $i"
      fi
    fi
  done

  if [ -n "$services" ]; then
    db_set carnet-upgrade/check-services "$services"
    db_go || true
  fi
}

cs_pgrep () {
    local failed_services

    while read line; do
        # get service param from stdin
        user=$(echo "$line" | awk -F '	' '{print $2}')
        psname=$(echo "$line" | awk -F '	' '{print $3}')
        nicename=$(echo "$line" | awk -F '	' '{print $4}')

        # check if service is running
        if ! pgrep -u $user -f "$psname" > /dev/null; then
            failed_services="$failed_services, $nicename"

        fi
    done

    echo ${failed_services#, }
}

# uzmi iz debconfa instalirane servise, i provjeri rade li
cs_postupgrade () {
  local services i failed_services msg_header

  case "$queuename" in
    upgrade) msg_header="$msg_finished_upgrade"
      ;;
    *)
      msg_header="$msg_finished"
      ;;
  esac

  db_get carnet-upgrade/check-services || true
  services="${RET// /|}"

  failed_services=$(
    echo "$services_to_check" \
    | grep -E "^($services)" \
    | sed 's/		*/	/g' \
    | cs_pgrep
  )

  if [ -n "$failed_services" ]; then
    notice "$msg_header$msg_failed_services$failed_services"
  else
    notice "$msg_header"
  fi
}

# checkiraj da li je sto zapisano u debconf
cs_check () {
  db_get carnet-upgrade/check-services || true
  debconf="$RET"

  if [ -n "$debconf" ]; then
    exit 0
  else
    exit 1
  fi
}

# prikazi sto je zapisano u debconf
cs_show () {
  db_get carnet-upgrade/check-services || true
  echo "$RET"
}

case "$1" in
preupgrade)	cs_preupgrade
	;;
postupgrade)	cs_postupgrade
        ;;
check)	cs_check
        ;;
show)   cs_show
        ;;
*)	echo "Usage: $0 (preupgrade|postupgrade|check|show)"
        exit 1 
        ;;
esac
exit 0