#!/bin/bash

#

# locale_updateMessageXml.sh -- This function parses XML-based files

# (e.g., scalable vector graphics), retrives translatable strings and

# creates/update gettext portable objects.

#

# 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 locale_updateMessageXml {

    # Print separator line.

    cli_printMessage '-' --as-separator-line

    # Define filename used to create both portable object templates

    # (.pot) and portable objects (.po) files.

    local MESSAGES="${L10N_WORKDIR}/messages"

    # Define regular expression to match the file extension of all

    # XML-based source files that can be localized inside the working

    # copy.  Be aware that sometimes, source files and output files

    # are stored in the same location (e.g., when rendering

    # `tcar-ug.docbook' file the `tcar-ug.xhtml' is saved in the same

    # location). Avoid using output files as if they were source

    # files, when retriving translatable strings.

    local EXTENSION='(svg|svgz|docbook)'

    # Build list of files to process. When building the patter, be

    # sure the value passed through `--filter' be exactly evaluated

    # with the extension as prefix. Otherwise it would be difficult to

    # match files that share the same characters in their file names

    # (e.g., it would be difficult to match only `hello.docbook' if

    # `hello-world.docbook' also exists in the same location).

    local FILES=$(cli_getFilesList ${ACTIONVAL} \

        --pattern="${FLAG_FILTER}\.${EXTENSION}" \

        --maxdepth='1' --type="f" \

        | egrep -v '/[[:alpha:]]{2}_[[:alpha:]]{2}/')

    # Print action message.

    cli_printMessage "${MESSAGES}.pot" --as-updating-line

    # Normalize XML files, expand entities before retriving

    # translatable strings and create the portable object template

    # (.pot) from such output.  The translatable strings are retrived

    # from the normalized output of files, not files themselves

    # (because of this, we don't include `#: filename:line' output on

    # .pot files).  Entity expansion is also necessary for DocBook

    # documents to be processed correctly. Notice that some long

    # DocBook document structures might use entities to split the

    # document structure into smaller pieces so they could be easier

    # to maintain. Also, don't validate svg files the same way you

    # validate docbook files; Docbook files have a DOCTYPE definition

    # while svg files don't. Without a DOCTYPE definition, it isn't

    # possible for `xmllint' to validate the document. 

    if [[ $ACTIONVAL =~ '^.+/(branches|trunk)/Manuals/.+$' ]];then

        # Another issue to consider is the amount of source files that

        # are being processed through xml2po. When there are more than

        # one file, xml2po interprets only the first one and discards

        # the rest in the list. This way, when more than one file

        # exists in the list, it isn't convenient to provide xmllint's

        # output to xml2po's input. Once here, we can say that in

        # order to expand DocBook entities it is required that only

        # one file must be provided at localization time (e.g., using

        # the `--filter' option). Otherwise translation messages are

        # retrived from all files, but no entity expansion is realized

        # because xmllint wouldn't be used in such case.

        if [[ $(echo "$FILES" | wc -l) -eq 1 ]];then

            xmllint --valid --noent ${FILES} | xml2po -a - \

                | msgcat --output=${MESSAGES}.pot --width=70 --no-location -

        else

            xml2po -a ${FILES} \

                | msgcat --output=${MESSAGES}.pot --width=70 --no-location -

        fi

    elif [[ $ACTIONVAL =~ '^.+/(branches|trunk)/Identity/Models/.+$' ]];then

        # Inside trunk/Identity/Models, design models can be

        # compressed or uncompressed. Because of this we cannot

        # process all the design models in one unique way. Instead, we

        # need to treat them individually based on their file type.

        # Initialize name of temporal files.

        local TEMPFILE=''

        local TEMPFILES=''

        for FILE in $FILES;do

            # Redefine temporal file based on file been processed.

            TEMPFILE=$(cli_getTemporalFile $(basename ${FILE} ))

            # Update the command used to read content of XML files.

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

                # Create uncompressed copy of file.

                /bin/zcat $FILE > $TEMPFILE

            else

                # Create uncompressed copy of file.

                /bin/cat $FILE > $TEMFILE

            fi

            # Concatenate temporal files into a list so we can process

            # them later through xml2po.

            TEMPFILES="${TEMPFILE} ${TEMPFILES}"

        done

        # Create the portable object template.

        xml2po -a $TEMPFILES \

            | msgcat --output=${MESSAGES}.pot --width=70 --no-location -

        # Remove list of temporal files. They are no longer needed.

        rm $TEMPFILES --force

    else

        cli_printMessage "`gettext "The path provided doesn't support localization."`" --as-error-line

    fi

   # Verify, initialize or merge portable objects from portable object

   # templates.

   locale_updateMessagePObjects "${MESSAGES}"

}