#!/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.

#

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

# Provide a secure interface to render content outside the render

# module. You can use this function to call the render module from

# other modules, safely. 

#

# This function builds a list of all available configuration files in

# locations passed as argument and reduces the list by applying

# regular expression patterns to each file in the list. Only files

# that match the regular expression pattern will remain in the final

# list. The regular expression patterns are applied to file's content,

# generally to find out if it has an specific option, value or

# combination of both inside.  Later, the resultant list of

# configuration files is passed to render module for processing.

#

# This function verifies the search path provided to render module to

# grant it is inside the repository before passing it to render module

# for processing.

function prepare_setRenderEnvironment {

    OPTIND=1

    while getopts "o:,v:" OPTION "${@}"; do

        case "${OPTION}" in

            o )

                # Define the name of the option you want to look

                # configuration files for.

                local OPTION_NAME=${OPTARG}

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

                    tcar_printMessage "`gettext "The option name cannot be empty."`" --as-error-line

                fi

                ;;

            v )

                # Define the value of the option you want to look

                # configuration files for.

                local OPTION_VALUE=${OPTARG}

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

                    tcar_printMessage "`gettext "The option value cannot be empty."`" --as-error-line

                fi

                ;;

        esac

    done

    # Clean up positional parameters to reflect the fact that options

    # have been processed already.

    shift $(( ${OPTIND} - 1 ))

    # Now that option arguments have been removed from positional

    # parameter, verify all other remaining arguments (the search

    # paths) do exist. They are required to search.

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

        tcar_printMessage "`gettext "The search path cannot be empty."`" --as-error-line

    fi

    # Define array variable to store configuration file paths.

    local -a CONFIGURATION_FILES

    # Define final filter regular expression. This regular expression

    # must match the option = "value" format we are using inside

    # configuration files.

    local CONFIGURATION_PATTERN="^${OPTION_NAME}[[:space:]]*=[[:space:]]*\"${OPTION_VALUE}\"$"

    for DIRECTORY in ${@};do

        # Clean-up the search path. This location must point to a

        # directory inside the workplace.

        DIRECTORY=$(tcar_printAbsolutePath ${DIRECTORY})

        # Verify the search path. It must exist and being a directory.

        tcar_checkFiles -ed ${DIRECTORY}

        # Define the list of configuration files the render module

        # will use as reference to produce documentation. At this

        # point it is very difficult that DIRECTORY doesn't exist or

        # be outside the workplace directory structure.

        CONFIGURATION_FILES[++${#CONFIGURATION_FILES[*]}]=$(tcar_getFilesList \

            -p '.+\.conf$' -t 'l' ${DIRECTORY} \

                | xargs egrep ${CONFIGURATION_PATTERN} | cut -d: -f1 | sort | uniq)

    done

    # Process the list of configuration files using the render module.

    tcar_setModuleEnvironment -m "render" -t "parent" ${CONFIGURATION_FILES[*]}

}