#!/bin/bash
#Funtions
Help()
{
   # Display Help
   echo
   echo "#########################"
   echo "#   ez ACL_UTIL Help    #"  
   echo "#########################"
   echo
   echo "Syntax: ezaclutil [-u <username> | -g <groupname> | -av][-a|r] [-f <ftpusername>] [-s <sftpusername>]"
   echo "options:"
   echo "-h, --help     Print this Help."
   echo
   echo "Get info about set ALC's"
   echo "-l, --list      #get current ACL rules"
   echo
   echo "Set user/group for ACL change"
   echo "-u <username>, --user  <username>   #User for ACL change"
   echo "-g <groupname>, --group <groupname> #group for ACL change "
   echo "-av, --allviewers                   #Set group to backup viewers (-g not needed)"
   echo 
   echo "Action for ACL rule"
   echo "-a, --add      #add ACL rule"
   echo "-r, --remove   #Remove ACL rule"
   echo
   echo "Set target for ACL change"
   echo "-f <ftpusername>, --ftp  <ftpusername>   #User for ACL change"
   echo "-s <sftpusername>, --sftp <sftpusername> #group for ACL change "
   echo
}

#Input Handeler
POSITIONAL=()
while [[ $# -gt 0 ]]
do
key="$1"

case $key in
    -h | --help)
    Help
    exit
    ;;
    -u | --user)
    TARGET=user
    USER=$2
    shift
    shift
    ;;
    -g | --group)
    TARGET=group
    GROUP=$2
    shift
    shift
    ;;
    -a | --add)
    ACTION=add
    shift
    ;;
    -r | --remove)
    ACTION=remove
    shift
    ;;
    -l | --list)
    ACTION=list
    shift
    ;;
    -lg | --listgui)
    ACTION=listgui
    shift
    ;;
    -av | --allviewers)
    TARGET=group
    GROUP=BCKviewer
    shift
    ;;
    
    -f | --ftp)
    FOLDERPATH="/backups/ftp/$2"
    shift
    shift
    ;;  
  -s | --sftp)
    FOLDERPATH="/backups/sftp/$2/home"
    shift
    shift
    ;;  
    *)    # unknown option
    POSITIONAL+=("$1") # save it in an array for later
    shift # past argument
    ;;
esac
done
set -- "${POSITIONAL[@]}" # restore positional parameters


#input Validation
##Action flag
if [ -z ${ACTION+x} ]; then echo "Incorrect or missing parameter(s)" && Help && exit; fi
##Target Flag
if [ "$ACTION" = "remove" ] || [ "$ACTION" = "add" ]; then
if [ -z ${TARGET+x} ]; then echo "Incorrect or missing parameter(s)" && Help && exit; fi

##User flag
if [ "$TARGET" = "user" ] && [ -z $USER ]; then
echo "User name not specified"
exit
fi

##Group flag
if [ "$TARGET" = "group" ] && [ -z $GROUP ]; then
echo "Group name not specified"
exit
fi
fi


##Path
if [ -z $FOLDERPATH ]; then echo "Target backup not specified" && exit; fi

if [ ! -d "$FOLDERPATH" ] && [ ! -f "$FOLDERPATH" ]; then
    echo "Target backup not found"
fi

#Script
if [ "$ACTION" = "list" ]; then
getfacl $FOLDERPATH
fi

if [ "$ACTION" = "listgui" ]; then
echo "If gui did not start make sure X11 forwarding is enabled"
echo "and eiciel it is installed"
eiciel $FOLDERPATH
fi

if [ "$ACTION" = "add" ] && [ "$TARGET" = "user"  ]; then
setfacl -R -m u:"$USER":rx "$FOLDERPATH"
setfacl -R -d -m u:"$USER":rx "$FOLDERPATH"
fi


if [ "$ACTION" = "add" ] && [ "$TARGET" = "group"  ]; then
setfacl -R -m g:"$GROUP":rx "$FOLDERPATH"
setfacl -R -d -m g:"$GROUP":rx "$FOLDERPATH"
fi

if [ "$ACTION" = "remove" ] && [ "$TARGET" = "user"  ]; then
setfacl -R -x u:"$USER" "$FOLDERPATH"
setfacl -R -d -x u:"$USER" "$FOLDERPATH"
fi


if [ "$ACTION" = "remove" ] && [ "$TARGET" = "group"  ]; then
setfacl -R -x g:"$GROUP" "$FOLDERPATH"
setfacl -R -d -x g:"$GROUP" "$FOLDERPATH"
fi