#!/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 {

    local CLI_FUNCTION_NAME=''

    local CLI_FUNCTION_DIR=''

    local CLI_FUNCTION_FILE=''

    local CLI_FUNCTION=''

    local CLI_FUNCTIONS=$(ls ${TCAR_CLI_INIT_DIR}/${TCAR_CLI_INIT_FUNCTION}_*.sh)

    # Initialize list of common functionalities to load.

    for CLI_FUNCTION in ${CLI_FUNCTIONS};do

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

            . ${CLI_FUNCTION}

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

        else

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

            exit

        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

    # Initialize variable holding arguments passed to centos-art.sh

    # command-line interface.

    local CLI_FUNCTION_ARGUMENTS=''

    # Redefine arguments using current positional parameters. 

    cli_setArguments "${@}"

    # Redefine positional parameters using arguments variable.

    eval set -- "${CLI_FUNCTION_ARGUMENTS}"

    # Check function name. The function name is critical for

    # centos-art.sh script to do something coherent. If it is not

    # provided, execute the help functionality and end script

    # execution.

    if [[ ! "${1}" ]] || [[ ! "${1}" =~ '^[[:alpha:]]' ]];then

        cli_runFnEnvironment help --read --format="texinfo" tcar-fs:::

        exit

    fi

    # Define function name (CLI_FUNCTION_NAME) using the first argument in

    # the command-line.

    CLI_FUNCTION_NAME=$(cli_getRepoName ${1} -f | cut -d '-' -f1)

    # Define function directory.

    CLI_FUNCTION_DIR=$(cli_getRepoName ${CLI_FUNCTION_NAME} -d)

    # Define function file name.

    CLI_FUNCTION_FILE=${TCAR_CLI_MODSDIR}/${CLI_FUNCTION_DIR}/${CLI_FUNCTION_NAME}.sh

    # Check function script execution rights.

    cli_checkFiles -x ${CLI_FUNCTION_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

    # Process all arguments currently available in this function

    # environment. If either ARGSS or ARGSL local variables have been

    # defined, argument processing goes through getopt for validation.

    cli_setArguments "${@}"

    # 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 "${CLI_FUNCTION_DIR}/${CLI_FUNCTION_NAME}"

    # Execute function.

    ${CLI_FUNCTION_NAME}

}