#! /bin/sh
#----------------------------------------------------------------------------
# /var/install/bin/nginx_fileedit - ask user to edit a file
#
# Creation   :  2003-07-19 fm
#               2015-04-30 ap
# Last Update:  $Id$
#
# Copyright (c) 2001-2022 the eisfair team, team@eisfair(dot)org
#
# usage: nginx_fileedit file
#
# return values:
#   0  editor started
#   1  editor not started
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#----------------------------------------------------------------------------

# ---------------------------------------------------------------------------
# verify file
# ---------------------------------------------------------------------------
verify_file ()
{
    # return
    #    0  file exists and is a regular (empty) file
    #    1  file does not exist
    #    2  file exists but is NOT a regular (empty) file
    #  127  /usr/bin/stat missing
    #    ?  other error

    check_file="$1"
    stat='/usr/bin/stat'

    # stat check_file
    file_type=$(LANG=C $stat --format='%F' $check_file 2>/dev/null)
    rc=$?

    # only if file exists
    if [ "$rc" = 0 ]
    then
       #  check file_type, default wrong file_type
       rc=2
       [ "$file_type" = 'regular file' ] && rc=0
       [ "$file_type" = 'regular empty file' ] && rc=0
    fi

    return $rc
}


UNUSABLE_EDITOR='/var/install/bin/edit-conf.cui'
WHICH='/usr/bin/which'

# include eislib
. /var/install/include/eislib

# include configuration
. /etc/config.d/setup
#Test . ./setup

if [ $# -eq 1 ]
then
    act_file="$1"
else
    clrhome
    mecho --error "No filename given"
    echo
    exit 1
fi

# check for unusable Editor
[ "$EDITOR" = "$UNUSABLE_EDITOR" ] && EDITOR=''
[ "$EDITOR_FALLBACK" = "$UNUSABLE_EDITOR" ] && EDITOR_FALLBACK=''
if [ "$EDITOR" = '' ] && [ "$EDITOR_FALLBACK" = '' ]
then
   mecho --info "No usable editor found"
   mecho --info "EDITOR was set to 'joe'"
   EDITOR='joe'
   EDITOR_FALLBACK='joe'
   anykey
fi

# if EDITOR is set, try to add path
editor="`echo "$EDITOR" | cut -d' ' -f1`"
editor_param="`echo "$EDITOR" | cut -d' ' -f2-`"
[ "$editor" = "$editor_param" ] && editor_param=''
if ${WHICH} $editor >/dev/null 2>/dev/null
then
    editor="`${WHICH} $editor`"
fi
if [ "$editor" = "" ] || [ ! -x "$editor" ]
then
    # EDITOR is empty or not executable
    EDITOR="$EDITOR_FALLBACK"
    editor="`echo "$EDITOR" | cut -d' ' -f1`"
    editor_param="`echo "$EDITOR" | cut -d' ' -f2-`"
    [ "$editor" = "$editor_param" ] && editor_param=''
    if ${WHICH} $editor >/dev/null 2>/dev/null
    then
        editor="`${WHICH} $editor`"
    fi
    if [ "$editor" = "" ] || [ ! -x "$editor" ]
    then
       mecho --error "No usable editor found"
       anykey
       exit 1
    fi
fi

editor="$editor $editor_param"
#echo "Using $editor"
#anykey

# check act_file
verify_file "$act_file"
rc=$?
if [ "$rc" = 1 ]
then
   mecho "File $act_file does not exist"
   #anykey
   rc=0
fi

if [ "$rc" = 2 ]
then
   mecho --error "File $act_file is not a regular file"
   mecho --error "Can't edit $act_file"
   anykey
   exit 1
fi

if [ ! "$rc" = 0 ]
then
   mecho --error "Internal error in verify_file (rc=$rc)"
   mecho --error "Can't edit $act_file"
   anykey
   exit 1
fi

exitval=0

editor_pgm=`echo $editor | cut -d' ' -f1`
basename=`basename $editor_pgm`
if [ "$basename" = "joe" ]
then
    mecho "You can get help by joe if you press 'Ctrl-K H'."
    mecho
    param="-nobackups"
elif [ "$basename" = "vi" -o "$basename" = "vim" ]
then
    mecho "You can get help by vi/vim if you enter ':help'."
    mecho
fi

$editor $param "$act_file"

exit $exitval