#!/bin/bash

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

#

#   cli.sh -- This function initiates the centos-art.sh script

#   command-line interface. This is the first script the centos-art.sh

#   runs, onces it has been executed in a terminal.

#

#   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 cli {

    # Initialize command-line interface default configuration values.

    if [[ -f ${TCAR_SCRIPT_INIT_DIR}/cli.conf ]];then

        . ${TCAR_SCRIPT_INIT_DIR}/cli.conf

    fi

    # Initialize list of common functionalities to load.

    for MODULE_SCRIPT in $(ls ${TCAR_SCRIPT_INIT_DIR}/Scripts/*.sh);do

        if [[ -x ${MODULE_SCRIPT} ]];then

            . ${MODULE_SCRIPT}

            export -f $(grep '^function ' ${MODULE_SCRIPT} | cut -d' ' -f2)

        else

            echo "${MODULE_SCRIPT} `gettext "has not execution rights."`"

        fi

    done

    # Trap signals in order to terminate the script execution

    # correctly (e.g., removing all temporal files before leaving).

    # Trapping the exit signal seems to be enough by now, since it is

    # always present as part of the script execution flow. Each time

    # the centos-art.sh script is executed it will inevitably end with

    # an EXIT signal at some point of its execution, even if it is

    # interrupted in the middle of its execution (e.g., through

    # `Ctrl+C').

    trap cli_terminateScriptExecution 0

    # Define module arguments local to this function. This is very

    # important in order to provide option parsing for different

    # function environment levels.

    local TCAR_ARGUMENTS=''

    # Define module's name (MODULE_NAME) using the first argument

    # in the command-line.

    local MODULE_NAME=$(cli_getRepoName "${1}" "-f" | cut -d '-' -f1)

    # Define regular expression to match available modules.

    local MODULE_NAME_LIST=$(ls ${TCAR_SCRIPT_BASEDIR}/Modules/ \

        | sed -r 's/.+-([[:alnum:]]+)$/\1/' \

        | tr '\n' '|' | sed -r 's/\|$//')

    # Check module's name possible values.

    if [[ ! ${MODULE_NAME} =~ "^(${MODULE_NAME_LIST})$" ]];then

        cli_printMessage "`gettext "The module provided isn't valid."`" --as-error-line

    fi

    # Define function directory.

    local MODULE_DIR=${TCAR_SCRIPT_BASEDIR}/Modules/${TCAR_SCRIPT_NAME}-${MODULE_NAME}

    # Define function file name.

    local MODULE_INIT_FILE=${MODULE_DIR}/${MODULE_NAME}.sh

    # Check function script execution rights.

    cli_checkFiles -x ${MODULE_INIT_FILE}

    # Remove the first argument passed to centos-art.sh command-line

    # in order to build optional arguments inside functionalities. We

    # start counting from second argument (inclusive) on.

    shift 1

    # When the word cli is provided as module to centos-art.sh script,

    # the cli module reduces its mission to just printing help and

    # version information about itself. After that, it must finish the

    # script execution successfully.

    if [[ ${MODULE_NAME} == "${TCAR_SCRIPT_INIT}" ]];then

        cli_getOptions "${@}"

    fi

    # Define default text editors used by centos-art.sh script.

    if [[ ! "${TCAR_USER_EDITOR}" =~ '/usr/bin/(vim|emacs|nano)' ]];then

        TCAR_USER_EDITOR='/usr/bin/vim'

    fi

    # Check text editor execution rights.

    cli_checkFiles -x ${TCAR_USER_EDITOR}

    # Go for function initialization. Keep the cli_exportFunctions

    # function calling after all variables and arguments definitions.

    cli_exportFunctions "${MODULE_INIT_FILE}"

    # Execute function.

    ${MODULE_NAME} "${@}"

}