#!/bin/bash

#

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

# conditional expressions are applied inside centos-art.sh script.

# Here is where we answer 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 ends its

# execution. 

#

# More than one file can be passed to this function, so we want to

# process them all as specified by the options. Since we are using

# getopt output it is possible to determine where options and

# non-option arguments are in the list of arguments  (e.g., options

# are on the left side of ` -- ' and non-options on the rigth side of

# ` -- '). Non-options are the files we want to verify and options how

# we want to verify them.

#

# Another issue to consider, when more than one file is passed to this

# function, is that we cannot shift positional parameters as we

# frequently do whe just one argument is passsed, doing so would

# annulate the validation for the second and later files passed to the

# function. So, in order to provide verification to all files passed

# to the function, the verification loop must be set individual for

# each option in this function.

#

# Assuming no option be passed to the function, a general verification

# is performed to determine whether or not the file exists without

# considering the file type just its existence.

#

# Copyright (C) 2009, 2010, 2011 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.

#

# ----------------------------------------------------------------------

# $Id$

# ----------------------------------------------------------------------

function cli_checkFiles {

    # Define short options.

    local ARGSS='d,r,h,x,w'

    # Define long options.

    local ARGSL='directory,regular-file,symbolic-link,execution,working-copy'

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

    # variable to this function scope.

    local ARGUMENTS=''

    # Initialize file variable as local to avoid conflicts outside

    # this function scope. In the file variable will set the file path

    # we'r going to verify.

    local FILE=''

    # Redefine ARGUMENTS variable using current positional parameters. 

    cli_parseArgumentsReDef "$@"

    # Redefine ARGUMENTS variable using getopt output.

    cli_parseArguments

    # Redefine positional parameters using ARGUMENTS variable.

    eval set -- "$ARGUMENTS"

    # Define list of files we want to apply verifications to.

    local FILES=$(echo $@ | sed -r 's!^.*--[[:space:]](.+)$!\1!')

    # Verify files in the list. It is required at least one.

    if [[ $FILES == '--' ]];then

        cli_printMessage "You need to provide one file at least." --as-error-line 

    fi

    # Look for options passed through positional parameters.

    while true; do

        case "$1" in

            -d|--directory )

                for FILE in $(echo $FILES);do

                    if [[ ! -d $FILE ]];then

                        cli_printMessage "`eval_gettext "The directory \\\"\\\$FILE\\\" does not exist."`" --as-error-line

                    fi

                done

                shift 1

                ;;

            -f|--regular-file )

                for FILE in $(echo $FILES);do

                    if [[ ! -f $FILE ]];then

                        cli_printMessage "`eval_gettext "The file \\\"\\\$FILE\\\" is not a regular file."`" --as-error-line

                    fi

                done

                shift 1

                ;;

            -h|--symbolic-link )

                for FILE in $(echo $FILES);do

                    if [[ ! -h $FILE ]];then

                        cli_printMessage "`eval_gettext "The file \\\"\\\$FILE\\\" is not a symbolic link."`" --as-error-line

                    fi

                done

                shift 1

                ;;

            -x|--execution )

                for FILE in $(echo $FILES);do

                    if [[ ! -x $FILE ]];then

                        cli_printMessage "`eval_gettext "The file \\\"\\\$FILE\\\" is not executable."`" --as-error-line

                    fi

                done

                shift 1

                ;;

            -w|--working-copy )

                for FILE in $(echo $FILES);do

                    if [[ ! $FILE =~ "^${HOME}/artwork/.+$" ]];then

                        cli_printMessage "`eval_gettext "The path \\\"\\\$FILE\\\" does not exist inside the working copy."`" --as-error-line

                    fi

                done

                shift 1

                ;;

            -- )

                for FILE in $(echo $FILES);do

                    if [[ ! -a $FILE ]];then

                        cli_printMessage "`eval_gettext "The path \\\"\\\$FILE\\\" does not exist."`" --as-error-line

                    fi

                done

                shift 1

                break

                ;;

        esac

    done

}