#!/bin/bash

#

# docbook_doTranslation.sh -- This function standardizes the way

# translation files are applied to DocBook design models in order to

# produce the translated instance that is used to expand translation

# markers and produce different output formats.

#

# Assuming no translation file exists, an untranslated instance is

# taken from the design model and created (i.e., just a copy) from it.

# Using a design model instance (translated or not) is required in

# order to expand translation markers safely.

#

# Copyright (C) 2009, 2010, 2011, 2012 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.

#

# ----------------------------------------------------------------------

# $Id$

# ----------------------------------------------------------------------

function docbook_doTranslation {

    # Define which command will be used to output the template

    # content. This is required because template files might be found

    # as compressed files inside the repository.

    local COMMAND="/bin/cat"

    if [[ $(file -b -i $TEMPLATE) =~ '^application/x-gzip$' ]];then

        COMMAND="/bin/zcat"

    fi

    # Move into template's directory in order to satisfy relative

    # entities.  Take care that some XML documents (e.g., DocBook

    # documents) can use entities relatively from their base

    # locations. In order to process such documents, it is necessary

    # to put the template directory up in the directory stack and

    # create the instance from there. Thus, it is possible to expand

    # relative entities correctly when validating the document.

    pushd $(dirname $TEMPLATE) > /dev/null

    # Verify translation file existence and create template

    # instance accordingly.

    if [[ -f ${TRANSLATION} ]];then

        # Print final location of translation file.

        cli_printMessage "${TRANSLATION}" --as-translation-line

        # Create translation instance to combine both template

        # translation and licenses translations.

        local TRANSLATION_INSTANCE=${TMPDIR}/message.po

        # Define path to DocBook locales using models as reference.

        local DOCBOOK_LOCALES=$(echo $DOCBOOK_MODELS \

            | sed 's!^!Locales/!')

        # Define list of all locale files you want to combine.

        local DOCBOOK_PO_FILES="${DOCBOOK_LOCALES}/Gpl/${CLI_LANG_LC}/messages.po \

            ${DOCBOOK_LOCALES}/Gfdl/${CLI_LANG_LC}/messages.po \

            ${TRANSLATION}"

        # Be sure the files we want to combine do exist.

        cli_checkFiles -e ${DOCBOOK_PO_FILES}

        # Combine license translations with template translation in

        # order to reuse licenses translations in template files

        # without including them in template portable objects. In the

        # case of DocBook templates, translations related to licenses

        # are required because license content is expanded at

        # execution time inside the DocBook instance used by XSL

        # processor during transformation.

        msgcat --output=${TRANSLATION_INSTANCE} \

            --width=70 --no-location --use-first ${DOCBOOK_PO_FILES}

        # Create the translated instance of design model.

        ${COMMAND} ${TEMPLATE} | xml2po -a -l ${CLI_LANG_LL} \

            -p ${TRANSLATION_INSTANCE} -o ${INSTANCE} -

        # Remove .xml2po.mo temporal file.

        if [[ -f ${PWD}/.xml2po.mo ]];then

            rm ${PWD}/.xml2po.mo

        fi

        # Remove instance created to store both licenses and template

        # translations.

        if [[ -f ${TRANSLATION_INSTANCE} ]];then

            rm ${TRANSLATION_INSTANCE}

        fi

    else

        # Create the non-translated instance of design model. 

        ${COMMAND} ${TEMPLATE} > ${INSTANCE}

    fi

    # Return to where we were.

    popd > /dev/null

    # Verify instance existence.

    cli_checkFiles -e $INSTANCE

}