#!/bin/bash

#

# render_doBaseActions.sh -- This function performs base-rendition

# action for all files.

#

# Copyright (C) 2009, 2010, 2011 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 render_doBaseActions {

    local -a FILES

    local FILE=''

    local OUTPUT=''

    local TEMPLATE=''

    local TEMPLATE_HAS_DOCTYPE=''

    local PARENTDIR=''

    local TRANSLATION=''

    local EXTERNALFILE=''

    local EXTERNALFILES=''

    local THIS_FILE_DIR=''

    local NEXT_FILE_DIR=''

    local RENDER_EXTENSION=''

    local COUNT=0

    # Verify default directory where design models are stored in.

    cli_checkFiles "$(cli_getRepoTLDir)/Identity/Models/Themes/${FLAG_THEME_MODEL}" --directory

    # Redefine parent directory for current workplace.

    PARENTDIR=$(basename "${ACTIONVAL}")

    # Define base location of template files.

    render_getDirTemplate

    # Loop through list of supported file extensions. 

    for RENDER_EXTENSION in ${RENDER_EXTENSIONS};do

        # Redefine name of rendition backend based on supported file

        # extension.

        if [[ $RENDER_EXTENSION == '^(svg|docbook)$' ]];then

            RENDER_BACKEND=${RENDER_EXTENSION}

        else

           cli_printMessage "`eval_gettext "The \\\"\\\$RENDER_EXTENSION\\\" file extension is not supported yet."`" --as-error-line 

        fi

        # Define the list of files to process. Use an array variable

        # to store the list of files to process. This make posible to

        # realize verifications like: is the current base directory

        # equal to the next one in the list of files to process?

        # Questions like this is let us to know when centos-art.sh is

        # leaving a directory structure and entering another. This

        # information is required in order for centos-art.sh to know

        # when to apply last-rendition actions.

        #

        # Another issue is that some directories might be named as if

        # they were files (e.g., using a renderable extension like

        # .docbook).  In these situations we need to avoid such

        # directories from being interpreted as a renderable file. For

        # this, pass the `--type="f"' option when building the list of

        # files to process in order to retrive regular files only.

        #

        # Another issue to consider here, is that in some cases both

        # templates and outputs might be in the same location. In

        # these cases localized content are stored in the same

        # location where template files are retrived from and we need

        # to avoid using localized content from being interpreted as

        # design models. In that sake, supress language-specific files

        # from the list of files to process.

        #

        # Another issue to consider here, is the way of filtering. We

        # cannot expand the pattern specified by FLAG_FILTER with a

        # `.*' here (e.g., "${FLAG_FILTER}.*\.${RENDER_EXTENSION}")

        # because that would suppress any possibility from the user to

        # specifiy just one file name in locations where more than one

        # file with the same name as prefix exists (e.g.,

        # `repository.docbook', `repository-preamble.docbook' and

        # `repository-parts.docbook').  Instead, pass filtering

        # control to the user whom can use regular expression markup

        # in the `--filter' option to decide whether to match

        # `repository.docbook' only (e.g., through

        # `--filter="repository"') or `repository-preamble.docbook'

        # and `repository-parts.docbook' but not `repository.docbook'

        # (e.g., through `--filter="repository-.*"').

        for FILE in $(cli_getFilesList ${TEMPLATE} \

            --pattern="${FLAG_FILTER}\.${RENDER_EXTENSION}" --type="f" \

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

            FILES[((++${#FILES[*]}))]=$FILE

        done

        # Verify list of files to process. Assuming no file is found,

        # evaluate the next supported file extension.

        if [[ ${#FILES[*]} -eq 0 ]];then

            continue

        fi

        # Initialize backend-specific functionalities.

        cli_exportFunctions "${RENDER_BACKEND_DIR}/$(cli_getRepoName \

            ${RENDER_BACKEND} -d)" "${RENDER_BACKEND}"

        # Start processing the base rendition list of FILES. Fun part

        # approching :-).

        while [[ $COUNT -lt ${#FILES[*]} ]];do

            # Define base file.

            FILE=${FILES[$COUNT]}

            # Define the base directory path for the current file being

            # process.

            THIS_FILE_DIR=$(dirname ${FILES[$COUNT]})

            # Define the base directory path for the next file that will

            # be process.

            if [[ $(($COUNT + 1)) -lt ${#FILES[*]} ]];then

                NEXT_FILE_DIR=$(dirname ${FILES[$(($COUNT + 1))]})

            else

                NEXT_FILE_DIR=''

            fi

            # Print separator line.

            cli_printMessage '-' --as-separator-line

            # Define final location of translation file.

            TRANSLATION=$(dirname $FILE \

               | sed -r 's!trunk/(Manuals|Identity)!trunk/L10n/\1!')/$(cli_getCurrentLocale)/messages.po

            # Define final location of template file.

            TEMPLATE=${FILE}

            # Verify design models file existence. We cannot continue

            # with out it.

            if [[ ! -f $TEMPLATE ]];then

                cli_printMessage "`gettext "The template file doesn't exist."`" --as-error-line

            fi

            # Verify whether the design model uses DOCTYPE definition

            # or not; and redefine related variable for further using.

            egrep '^ /dev/null

            TEMPLATE_HAS_DOCTYPE=$?

            # Validate design model before processing it. This step is

            # very important in order to detect document's

            # malformations and warn you about it, so you can correct

            # them before processing the document as input.  Notice

            # that, here, validation is possible only for documents

            # which have a DOCTYPE definition inside.

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

                # Print action message.

                cli_printMessage "$TEMPLATE" --as-validating-line

                # Validate document before processing it.  

                xmllint --valid --noent --noout $TEMPLATE

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

                    cli_printMessage "`gettext "Validation failed."`" --as-error-line

                fi

            else

                # Print action message.

                cli_printMessage "$TEMPLATE" --as-template-line

            fi

            # Define final location of output directory.

            render_getDirOutput

            # Get relative path to file. The path string (stored in

            # FILE) has two parts: 1. the variable path and 2. the

            # common path.  The variable path is before the common

            # point in the path string. The common path is after the

            # common point in the path string. The common point is the

            # name of the parent directory (stored in PARENTDIR).

            #

            # Identity/Models/Themes/.../Firstboot/3/splash-small.svg

            # -------------------------^| the     |^------------^

            # variable path             | common  |    common path

            # -------------------------v| point   |    v------------v

            # Identity/Images/Themes/.../Firstboot/Img/3/splash-small.png

            #

            # What we do here is remove the varibale path, the common

            # point, and the file extension parts in the string

            # holding the path retrived from design models directory

            # structure.  Then we use the common path as relative path

            # to store the the final image file.

            #

            # The file extension is removed from the common path

            # because it is set when we create the final image file.

            # This configuration let us use different extensions for

            # the same file name.

            #

            # When we render using base-rendition action, the

            # structure of files under the output directory will be

            # the same used after the common point in the related

            # design model directory structure.

            FILE=$(echo ${FILE} \

                | sed -r "s!.*${PARENTDIR}/!!" \

                | sed -r "s/\.${RENDER_EXTENSION}$//")

            # Define absolute path to final file (without extension).

            FILE=${OUTPUT}/$(basename "${FILE}")

            # Define instance name from design model.

            INSTANCE=$(cli_getTemporalFile ${TEMPLATE})

            # Apply translation file to design model to produce the design

            # model translated instance. 

            render_doTranslation

            # Expand translation markers inside design model instance.

            cli_expandTMarkers ${INSTANCE}

            # Perform backend base-rendition.

            ${RENDER_BACKEND}

            # Remove template instance. 

            if [[ -f $INSTANCE ]];then

                rm $INSTANCE

            fi

            # Increment file counter.

            COUNT=$(($COUNT + 1))

        done

        # Unset backend-specific functionalities.

        cli_unsetFunctions "${RENDER_BACKEND_DIR}/$(cli_getRepoName \

            ${RENDER_BACKEND} -d)" "${RENDER_BACKEND}"

    done

}