#!/bin/bash

######################################################################

#

#   tcar_checkFiles.sh -- This function standardizes the way file

#   conditional expressions are applied to files.  Here is where

#   tcar.sh script answers questions like: is the file a regular

#   file or a directory?  Or, is it a symbolic link? Or even, does it

#   have execution rights, etc.  If the verification fails somehow at

#   any point, an error message is output and tcar.sh script

#   finishes its execution. 

#

#   Written by:

#   * Alain Reguera Delgado <al@centos.org.cu>, 2009-2013

#

# Copyright (C) 2009-2013 The CentOS Artwork SIG

#

# 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.

#

# This program is distributed in the hope that it will be useful, but

# WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

# General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

#

######################################################################

function tcar_checkFiles {

    # Initialize local array variables.

    local -a CONDITION_COMMAND

    local -a CONDITION_PATTERN

    local -a CONDITION_MESSAGE

    # Initialize local counter.

    local COUNTER=0

    OPTIND=1

    while getopts "i:,r,m:,n,d,e,f,h,x" OPTION "${@}"; do

        case "${OPTION}" in

            d )

                CONDITION_COMMAND[((++${#CONDITION_COMMAND[*]}))]='/usr/bin/test'

                CONDITION_PATTERN[((++${#CONDITION_PATTERN[*]}))]='-d'

                CONDITION_MESSAGE[((++${#CONDITION_MESSAGE[*]}))]="`gettext "isn't a directory."`"

                ;;

            e )

                CONDITION_COMMAND[((++${#CONDITION_COMMAND[*]}))]='/usr/bin/test'

                CONDITION_PATTERN[((++${#CONDITION_PATTERN[*]}))]='-e'

                CONDITION_MESSAGE[((++${#CONDITION_MESSAGE[*]}))]="`gettext "doesn't exist."`"

                ;;

            f )

                CONDITION_COMMAND[((++${#CONDITION_COMMAND[*]}))]='/usr/bin/test'

                CONDITION_PATTERN[((++${#CONDITION_PATTERN[*]}))]='-f'

                CONDITION_MESSAGE[((++${#CONDITION_MESSAGE[*]}))]="`gettext "isn't a regular file."`"

                ;;

            h )

                CONDITION_COMMAND[((++${#CONDITION_COMMAND[*]}))]='/usr/bin/test'

                CONDITION_PATTERN[((++${#CONDITION_PATTERN[*]}))]='-h'

                CONDITION_MESSAGE[((++${#CONDITION_MESSAGE[*]}))]="`gettext "isn't a symbolic link."`"

                ;;

            x )

                CONDITION_COMMAND[((++${#CONDITION_COMMAND[*]}))]='/usr/bin/test'

                CONDITION_PATTERN[((++${#CONDITION_PATTERN[*]}))]='-x'

                CONDITION_MESSAGE[((++${#CONDITION_MESSAGE[*]}))]="`gettext "isn't an executable file."`"

                ;;

            i )

                local MIME=${OPTARG}

                CONDITION_COMMAND[((++${#CONDITION_COMMAND[*]}))]='/usr/bin/file'

                CONDITION_PATTERN[((++${#CONDITION_PATTERN[*]}))]='-bi'

                CONDITION_MESSAGE[((++${#CONDITION_MESSAGE[*]}))]="`eval_gettext "isn't a \\\"\\\$MIME\\\" file."`"

                ;;

            m )

                CONDITION_COMMAND[((++${#CONDITION_COMMAND[*]}))]='match'

                CONDITION_PATTERN[((++${#CONDITION_PATTERN[*]}))]="${OPTARG}"

                CONDITION_MESSAGE[((++${#CONDITION_MESSAGE[*]}))]="`gettext "doesn't match its pattern."`"

                ;;

            n )

                CONDITION_COMMAND[((++${#CONDITION_COMMAND[*]}))]="/bin/rpm"

                CONDITION_PATTERN[((++${#CONDITION_PATTERN[*]}))]="-q --quiet"

                CONDITION_MESSAGE[((++${#CONDITION_MESSAGE[*]}))]="`gettext "isn't installed in the system."`"

                ;;

        esac

    done

    # Clean up positional parameters to reflect the fact that options

    # have been processed already.

    shift $(( ${OPTIND} - 1 ))

    # Define list of files we want to apply verifications to, now that

    # all option-like arguments have been removed from positional

    # parameters list so we are free to go with the verifications.

    local FILE=''

    local FILES=${@}

    # Verify existence of files to prevent tcar.sh script from

    # using the current location in cases when it shouldn't (e.g.,

    # here it is expecting a list of files to process.).

    if [[ -z ${FILES} ]];then

        tcar_printMessage "`gettext "No file for processing found."`" --as-error-line

    fi

    for FILE in ${FILES};do

        until [[ ${COUNTER} -eq ${#CONDITION_PATTERN[*]} ]];do

            case ${CONDITION_COMMAND[${COUNTER}]} in

                "/usr/bin/test" | "/bin/rpm" )

                ${CONDITION_COMMAND[${COUNTER}]} ${CONDITION_PATTERN[${COUNTER}]} ${FILE} \

                    || tcar_printMessage "${FILE} ${CONDITION_MESSAGE[${COUNTER}]}" --as-error-line

                ;;

                "/usr/bin/file" )

                if [[ ! $(${CONDITION_COMMAND[${COUNTER}]} ${CONDITION_PATTERN[${COUNTER}]} ${FILE}) =~ "^${MIME}" ]];then

                    tcar_printMessage "${FILE} ${CONDITION_MESSAGE[${COUNTER}]}" --as-error-line

                fi

                ;;

                "match" )

                if [[ ! ${FILE} =~ "${CONDITION_PATTERN[${COUNTER}]}" ]];then

                    tcar_printMessage "${FILE} ${CONDITION_MESSAGE[${COUNTER}]}" --as-error-line

                fi

                ;;

                * )

                tcar_printMessage "`gettext "The condition command provided isn't supported."`" --as-error-line

                ;;

            esac

            COUNTER=$((${COUNTER} + 1))

        done

    done

}