#!/bin/bash

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

#

#   cli_exportFunctions.sh -- This function standardizes the way

#   specific functionalities are exported to centos-art.sh script

#   environment.

#

#   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_exportFunctions {

    # Retrieve export identifier for the function we want to export.

    local FUNCTION_EXPORTID="${1}"

    # Verify the export identification existence. This argument must

    # be passed as first argument and match a relative path format.

    if [[ ! ${FUNCTION_EXPORTID} =~ '^[A-Z][[:alpha:]]+(/[[:alpha:]_]+)+$' ]];then

        cli_printMessage "`gettext "The function's export id doesn't match its pattern."`" --as-error-line

    fi

    # Define the source location where function files are placed in.

    local FUNCTION_LOCATION=${TCAR_CLI_MODSDIR}/$(dirname ${FUNCTION_EXPORTID})

    # Define suffix used to retrieve function files.

    local FUNCTION_SUFFIX=$(basename "${FUNCTION_EXPORTID}")

    # Verify the suffix value used to retrieve function files.

    # Assuming no suffix value is passed as second argument to this

    # function, use the function name value (CLI_FUNCTION_NAME) as default

    # value.

    if [[ -z ${FUNCTION_SUFFIX} ]];then

        FUNCTION_SUFFIX="${CLI_FUNCTION_NAME}"

    fi

    # Redefine suffix to match all related function files inside the

    # related function directory.

    FUNCTION_SUFFIX=${FUNCTION_SUFFIX}'[[:alpha:]_]*'

    # Define the pattern used to retrieve function names from function

    # files.

    local FUNCTION_PATTERN="^function[[:space:]]+${FUNCTION_SUFFIX}[[:space:]]+{[[:space:]]*$"

    # Define the list of files.

    local FUNCTION_FILE=''

    local FUNCTION_FILES=$(cli_getFilesList ${FUNCTION_LOCATION} \

        --pattern="${FUNCTION_LOCATION}/${FUNCTION_SUFFIX}\.sh$" \

        --maxdepth='1' --mindepth='1' --type='f')

    # Verify the list of files. If no function file exists for the

    # location specified stop the script execution. Otherwise the

    # script will surely try to execute a function that haven't been

    # exported yet and report an error about it.

    if [[ -z ${FUNCTION_FILES} ]];then

        cli_printMessage "${FUNCNAME}: `gettext "No function file was found."`" --as-error-line

    fi

    # Process the list of files.

    for FUNCTION_FILE in ${FUNCTION_FILES};do

        # Verify the execution rights for function file.

        cli_checkFiles -x ${FUNCTION_FILE}

        # Verify that function files have not been already exported.

        # If they have been already exported don't export them again.

        # Instead, continue with the next function file in the list.

        declare -F | gawk '{ print $3 }' | egrep "^${FUNCTION_FILE}$" > /dev/null

        if [[ $? -eq 0 ]];then

            continue

        fi

        # Initialize the function file.

        . ${FUNCTION_FILE}

        # Export the function names inside the file to current shell

        # script environment.

        export -f $(egrep "${FUNCTION_PATTERN}" ${FUNCTION_FILE} | gawk '{ print $2 }')

    done

}