#!/bin/bash
#
# cli_getFilesList.sh -- This function outputs the list of files to
# process.
#
# Copyright (C) 2009, 2010, 2011 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.
#
# ----------------------------------------------------------------------
# $Id$
# ----------------------------------------------------------------------

function cli_getFilesList {

    # Define short options.
    local ARGSS=''

    # Define long options.
    local ARGSL='pattern:,mindepth:,maxdepth:,type:,uid:'

    # Initialize arguments with an empty value and set it as local
    # variable to this function scope.
    local ARGUMENTS=''

    # Initialize pattern used to reduce the find output.
    local PATTERN="$FLAG_FILTER"

    # Initialize options used with find command.
    local OPTIONS=''

    # 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"

    while true;do
        case "$1" in

            --pattern )
                PATTERN="$2"
                shift 2
                ;;

            --maxdepth )
                OPTIONS="$OPTIONS -maxdepth $2"
                shift 2
                ;;

            --mindepth )
                OPTIONS="$OPTIONS -mindepth $2"
                shift 2
                ;;

            --type )
                OPTIONS="$OPTIONS -type $2"
                shift 2
                ;;

            --uid )
                OPTIONS="$OPTIONS -uid $2"
                shift 2
                ;;

            -- )
                shift 1
                break
                ;;
        esac
    done

    # At this point all options arguments have been processed and
    # removed from positional parameters. Only non-option arguments
    # remain so we use them as source location for find command to
    # look files for.
    local LOCATIONS="$@"

    # Verify locations.
    cli_checkFiles ${LOCATIONS}

    # Redefine pattern as regular expression. When we use regular
    # expressions with find, regular expressions are evaluated against
    # the whole file path.  This way, when the regular expression is
    # specified, we need to build it in a way that matches the whole
    # path. Doing so, everytime we pass the `--filter' option in the
    # command-line could be a tedious task.  Instead, in the sake of
    # reducing some typing, we prepare the regular expression here to
    # match the whole path using the regular expression provided by
    # the user as pattern. Do not use LOCATION variable as part of
    # regular expresion so it could be possible to use path expansion.
    # Using path expansion reduce the amount of places to find out
    # things and so the time required to finish the task.
    PATTERN="^.*(/)?${PATTERN}$"

    # Define list of files to process. At this point we cannot verify
    # whether the LOCATION is a directory or a file since path
    # expansion coul be introduced to it. The best we can do is
    # verifying exit status and go on.
    find ${LOCATIONS} -regextype posix-egrep ${OPTIONS} -regex "${PATTERN}" | sort | uniq

}