#!/bin/bash

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

#

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

#   conditional expressions are applied to files.  Here is where

#   centos-art.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 centos-art.sh script

#   finishes its execution. 

#

#   Written by: 

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

#     Key fingerprint = D67D 0F82 4CBD 90BC 6421  DF28 7CCE 757C 17CA 3951

#

# Copyright (C) 2009-2013 The CentOS Project

#

# 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 {

    # Define short options.

    local ARGSS='i:,r,m:,n,d,e,f,h,x'

    # Define long options.

    local ARGSL='mime:,is-versioned,match:,is-installed'

    # Initialize local array variables.

    local -a CONDITION_COMMAND

    local -a CONDITION_PATTERN

    local -a CONDITION_MESSAGE

    # Initialize local counter.

    local COUNTER=0

    # Initialize arguments with an empty value and set it as local

    # variable to this function scope. Doing this is very important to

    # avoid any clash with higher execution environments. This

    # variable is shared for different function environments.

    local TCAR_ARGUMENTS=''

    # Redefine arguments using current positional parameters. 

    tcar_setArguments "${@}"

    # Redefine positional parameters using arguments variable.

    eval set -- "${TCAR_ARGUMENTS}"

    # Look for options passed through positional parameters.

    while true; do

        case "${1}" in

            -d )

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

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

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

                shift 1

                ;;

            -e )

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

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

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

                shift 1

                ;;

            -f )

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

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

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

                shift 1

                ;;

            -h )

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

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

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

                shift 1

                ;;

            -x )

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

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

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

                shift 1

                ;;

            -i | --mime )

                local MIME=${2}

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

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

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

                shift 2

                ;;

            -m | --match )

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

                CONDITION_PATTERN[((++${#CONDITION_PATTERN[*]}))]="${2}"

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

                shift 2

               ;;

            -r | --is-versioned )

                CONDITION_COMMAND[((++${#CONDITION_COMMAND[*]}))]="centos-art"

                CONDITION_PATTERN[((++${#CONDITION_PATTERN[*]}))]="vcs --is-versioned"

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

                shift 1

                ;;

            -n | --is-installed )

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

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

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

                shift 1

                ;;

            -- )

                shift 1

                break

                ;;

        esac

    done

    # 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=${@}

    for FILE in ${FILES};do

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

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

                "test" | "rpm" )

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

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

                ;;

                "centos-art" )

                # Don't create another level for error messages here

                # (that would duplicate them unnecessarily).  Instead,

                # set error messages inside specific functionalities

                # and use them directly from there.

                tcar_setFnEnvironment ${CONDITION_PATTERN[${COUNTER}]} ${FILE}

                ;;

                "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

}