#!/bin/bash

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

#

#   tcar - The CentOS Artwork Repository automation tool.

#   Copyright © 2014 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.

#

#   Alain Reguera Delgado <al@centos.org.cu>

#   39 Street No. 4426 Cienfuegos, Cuba.

#

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

# Standardize the way directory structures are organized inside the

# working copy of CentOS Artwork Repository. You can use this function

# to retrieve information from paths (e.g., releases, architectures

# and theme artistic motifs) or the patterns used to build the paths.

function tcar_getPathComponent {

    # Define release pattern.

    local VERSION="(([[:digit:]]+)(\.([[:digit:]]+))?)"

    # Define architecture pattern. Make it match the architectures the

    # CentOS distribution is able to be installed on.

    local ARCHITECTURE="(i386|x86_64)"

    # Define regular expression pattern that match the theme artistic

    # motif component inside the path strings.

    local THEME_MOTIF="Themes/Motifs/(([[:alnum:]]+)/(${VERSION}))"

    # Define location we want to apply verifications to.

    local LOCATION=${1}

    # Remove location from positional parameters, so only the option

    # remain.

    shift 1

    # Look for options passed through positional parameters.

    while true;do

        case "${1}" in

            --release )

                echo "${LOCATION}" | egrep "${VERSION}" | sed -r "s!.*/${VERSION}/.*!\1!"

                shift 1

                break

                ;;

            --release-major )

                echo "${LOCATION}" | egrep "${VERSION}" | sed -r "s!.*/${VERSION}/.*!\2!"

                shift 1

                break

                ;;

            --release-minor )

                echo "${LOCATION}" | egrep "${VERSION}" | sed -r "s!.*/${VERSION}/.*!\4!"

                shift 1

                break

                ;;

            --release-pattern )

                echo "${VERSION}"

                shift 1

                break

                ;;

            --architecture )

                echo "${LOCATION}" | egrep "${ARCHITECTURE}" | sed -r "s!${ARCHITECTURE}!\1!"

                shift 1

                break

                ;;

            --architecture-pattern )

                echo "${ARCHITECTURE}"

                shift 1

                break

                ;;

            --motif )

                echo "${LOCATION}" | egrep "${THEME_MOTIF}" | sed -r "s!.*${THEME_MOTIF}.*!\1!"

                shift 1

                break

                ;;

            --motif-name )

                echo "${LOCATION}" | egrep "${THEME_MOTIF}" | sed -r "s!.*${THEME_MOTIF}.*!\2!"

                shift 1

                break

                ;;

            --motif-version )

                echo "${LOCATION}" | egrep "${THEME_MOTIF}" | sed -r "s!.*${THEME_MOTIF}.*!\3!"

                shift 1

                break

                ;;

            --motif-pattern )

                echo "${THEME_MOTIF}"

                shift 1

                break

                ;;

            --repo-dir )

                echo "${LOCATION}" | sed "s,${TCAR_USER_WRKDIR}/,,"

                shift 1

                break

                ;;

        esac

    done

}