#!/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 files and directories name convection inside the working
# copy of CentOS Artwork Repository. As convection, regular files are
# written in lower-case and directories are written capitalized.  Use
# this function to sanitate the name of regular files and directories
# on paths you work with.
function tcar_getRepoName {

    # Define the name we want to apply verifications to.
    local NAME="${1}"

    # Avoid using options as it were names. When name value is empty
    # but an option is provided, the option becomes the first
    # positional argument and is evaluated as it were a name which is
    # something we need to prevent from happening.
    if [[ ${NAME} =~ '^-' ]];then
        return
    fi

    # Look for options passed through positional parameters.
    case "${2}" in

        -f|--basename )

            # Reduce the path passed to use just the non-directory
            # part of it (i.e., the last component in the path; _not_
            # the last "real" directory in the path).
            NAME=$(basename ${NAME})

            # Clean value.
            NAME=$(echo ${NAME} \
                | tr -s ' ' '_' \
                | tr '[:upper:]' '[:lower:]')
            ;;

        -d|--dirname )

            local DIR=''
            local DIRS=''
            local CLEANDIRS=''
            local PREFIXDIR=''

            # In order to sanitate each directory in a path, it is
            # required to break off the path string so each component
            # can be worked out individually and later combine them
            # back to create a clean path string.
                
            # Reduce path information passed to use the directory part
            # of it only.  Of course, this is applied if there is a
            # directory part in the path.  Assuming there is no
            # directory part but a non-empty value in the path, use
            # that value as directory part and clean it up.
            if [[ ${NAME} =~ '.+/.+' ]];then

                # When path information is reduced, we need to
                # consider that absolute paths contain some
                # directories outside the working copy directory
                # structure that shouldn't be sanitized (e.g., /home,
                # /home/centos, /home/centos/artwork,
                # /home/centos/artwork/turnk, trunk, etc.) So, we keep
                # them unchanged for later use.
                PREFIXDIR=$(echo ${NAME} \
                    | sed -r "s,^((${TCAR_USER_WRKDIR}/)?(trunk|branches|tags)/)?.+$,\1,")

                # ... and remove them from the path information we do
                # want to sanitate.
                DIRS=$(dirname "${NAME}" \
                    | sed -r "s!^${PREFIXDIR}!!" \
                    | tr '/' ' ')

            else
                
                # At this point, there is not directory part in the
                # information passed, so use the value passed as
                # directory part as such. 
                DIRS=${NAME}

            fi

            for DIR in ${DIRS};do

                # Sanitate directory component.
                if [[ ${DIR} =~ '^[a-z]' ]];then
                    DIR=$(echo ${DIR} \
                        | tr -s ' ' '_' \
                        | tr '[:upper:]' '[:lower:]' \
                        | sed -r 's/^([[:alpha:]])/\u\1/')
                fi

                # Rebuild path using sanitized values.
                CLEANDIRS="${CLEANDIRS}/${DIR}"

            done

            # Redefine path using sanitized values.
            NAME=$(echo ${CLEANDIRS} | sed -r "s!^/!!")

            # Add prefix directory information to sanitate path
            # information.
            if [[ "${PREFIXDIR}" != '' ]];then
                NAME=${PREFIXDIR}${NAME}
            fi
        ;;

    esac

    # Print out the clean path string.
    echo ${NAME}

}