#! /bin/sh

set -e

# We need debconf
. /usr/share/debconf/confmodule

# The following function does the real stuff
debconf_dialog() {
  # Ask the user if he wants this stuff at all
  db_input medium quota/run_warnquota || true
  db_go

  # Ask more questions if warnquota enabled
  db_get quota/run_warnquota
  if [ "$RET" = "true" ]; then
    # Set the defaults for email addresses
    if [ -f /etc/mailname ]; then
      email="root@`cat /etc/mailname`"
    else
      email="root@`hostname -f`"
    fi

    db_fget quota/mailfrom seen
    if [ "$RET" = "false" ]; then
      db_set quota/mailfrom "$email"
    fi
    db_fget quota/supportemail seen
    if [ "$RET" = "false" ]; then
      db_set quota/supportemail "$email"
    fi
    db_fget quota/message seen
    if [ "$RET" = "false" ]; then
      db_set quota/message ""
    fi
    db_fget quota/signature seen
    if [ "$RET" = "false" ]; then
      db_set quota/signature ""
    fi
    db_fget quota/subject seen
    if [ "$RET" = "false" ]; then
      db_set quota/subject ""
    fi
    db_fget quota/cc seen
    if [ "$RET" = "false" ]; then
      db_set quota/cc ""
    fi
    db_fget quota/charset seen
    if [ "$RET" = "false" ]; then
      db_set quota/charset ""
    fi
    db_fget quota/cc_before seen
    if [ "$RET" = "false" ]; then
      db_set quota/cc_before ""
    fi
    db_fget quota/group_message seen
    if [ "$RET" = "false" ]; then
      db_set quota/group_message ""
    fi
    db_fget quota/group_signature seen
    if [ "$RET" = "false" ]; then
      db_set quota/group_signature ""
    fi
    
    # Now ask the user
    db_input medium quota/supportemail || true
    db_input high quota/supportphone || true
    db_input low quota/mailfrom || true
    db_input low quota/message || true
    db_input low quota/signature || true
    db_input low quota/subject || true
    db_input low quota/cc || true
    db_input low quota/charset || true
    db_input low quota/cc_before || true
    db_input low quota/group_message || true
    db_input low quota/group_signature || true
    db_go

    # If we did not get a support phone we'll set it to "*unknown*"
    db_get quota/supportphone
    if [ -z "$RET" ]; then
      db_set quota/supportphone "*unknown*"
    fi
  fi
}

# Check if we need to run the configuration dialog
# a) explicitely requested
if [ "$1" = "reconfigure" ]; then
  debconf_dialog
  # Move the old configuration files out of the way
  rm -f /etc/warnquota.conf /etc/default/quota
fi

# b) new installation
if [ "$1" = "configure" ] && [ -z "$2" ]; then
  debconf_dialog
  db_get quota/run_warnquota
  if [ "$RET" = "true" ]; then
	  # Move the old configuration file out of the way
  	rm -f /etc/warnquota.conf /etc/default/quota
 fi
fi

# c) upgrading from before debconf
# In this case only the debconf data is updated - it is not written to 
# the config file, only after dpkg-reconfigure something will happen.
if [ "$1" = "configure" ] && dpkg --compare-versions "$2" le-nl "3.03-4"; then
  # Figure out what we can from /etc/warnquota.conf
  if grep -q "<enter your phone number here>" /etc/warnquota.conf; then
    db_set quota/run_warnquota false
    db_fset quota/run_warnquota seen true
    db_set quota/supportphone "*unknown*"
  else
    db_set quota/run_warnquota true
    db_fset quota/run_warnquota seen true
    db_set quota/mailfrom \
      "`sed -n 's/^FROM[^=]*=[[:space:]]*"\([^"]*\)"$/\1/p' \
		/etc/warnquota.conf`"
    db_fset quota/mailfrom seen true
    db_set quota/supportemail \
      "`sed -n 's/^SUPPORT[^=]*=[[:space:]]*"\([^"]*\)"$/\1/p' \
		/etc/warnquota.conf`"
    db_fset quota/supportemail seen true
    db_set quota/supportphone \
      "`sed -n 's/^PHONE[^=]*=[[:space:]]*"\([^"]*\)"$/\1/p' \
      		/etc/warnquota.conf`"
    db_fset quota/supportphone seen true
  fi
fi

# d) upgrading changes behaviour of rpc.rquotad
if [ "$1" = "configure" ] && dpkg --compare-versions "$2" le-nl "3.06-1"; then
	db_input high quota/rquota_setquota || true
	db_go
fi

# e) upgrading add warnquota group email
if [ "$1" = "configure" ] && dpkg --compare-versions "$2" le-nl "3.06-2"; then
	db_input low quota/group_message || true
	db_input low quota/group_signature || true
	db_go
fi

# f) upgrading from a version that did not ask for SUBJECT and CC
if [ "$1" = "configure" ] && dpkg --compare-versions "$2" le-nl "3.11-1"; then
  # Figure out what we can from /etc/warnquota.conf
  db_set quota/subject \
    "`sed -n 's/^SUBJECT[^=]*=[[:space:]]*"\([^"]*\)"$/\1/p' \
	/etc/warnquota.conf`"
  db_fset quota/subject seen true
  db_set quota/cc \
    "`sed -n 's/^CC_TO[^=]*=[[:space:]]*"\([^"]*\)"$/\1/p' \
	/etc/warnquota.conf`"
  db_fset quota/cc seen true
fi

# g) upgrading from a version that did not have CC_BEFORE
if [ "$1" = "configure" ] && dpkg --compare-versions "$2" le-nl "3.11-4"; then
  # Ask the question only if warnquota enabled
  db_get quota/run_warnquota
  if [ "$RET" = "true" ]; then
	db_input low quota/cc_before || true
	db_go
  fi
fi

# h) upgrading from a version that did not have CHARSET
if [ "$1" = "configure" ] && dpkg --compare-versions "$2" le-nl "3.16-1"; then
  # Ask the question only if warnquota enabled
  db_get quota/run_warnquota
  if [ "$RET" = "true" ]; then
	db_input low quota/charset || true
	db_go
  fi
fi