#!/bin/bash

#

# conf_setBaseRendition.sh -- This function standardizes base actions

# related to image production through configuration files.

#

# 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.

#

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

# $Id$

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

function conf_setBaseRendition {

    local COUNTER=0

    local EXPORTID="CENTOSARTWORK"

    local -a MODEL_INSTANCES

    local -a IMAGE_INSTANCES 

    local -a IMAGE_COMMANDS

    # Define absolute path to output location. This is the location

    # inside the working copy all images will be stored in.

    local OUTPUT=${OUTPUT}/${FGCOLOR}/${BGCOLOR}/${HEIGHT}/${FILENAME}

    # 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 VIEWER="/bin/cat"

    while [[ $COUNTER -lt ${#MODELS[*]} ]];do

        # Verify existence and extension of design models.

        cli_checkFiles ${MODELS[$COUNTER]} -f --match='\.(svgz|svg)$'

        # Define file name for design model instances. We need to use

        # a random string in from of it to prevent duplication.

        # Remember that different files can have the same name in

        # different locations. Use the correct file information.

        MODEL_INSTANCES[$COUNTER]=${TMPDIR}/${RANDOM}-$(basename ${MODELS[$COUNTER]})

        # Define file name for image instances. We need to use a

        # random string in from of it to prevent duplication.

        # Remember that different files can have the same name in

        # different locations. Use the correct file information.

        IMAGE_INSTANCES[$COUNTER]=${TMPDIR}/${RANDOM}-$(basename ${MODELS[$COUNTER]} \

            | sed -r 's/\.(svgz|svg)$/.png/')

        # Redefine command used to read design models.

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

            VIEWER="/bin/zcat"

        fi

        # Create uncompressed design model instances in order to make

        # color replacements without affecting original design models. 

        $VIEWER ${MODELS[$COUNTER]} > ${MODEL_INSTANCES[$COUNTER]}

        # Make your best to be sure the design model instance you are

        # processing is a valid scalable vector graphic.

        cli_checkFiles ${MODEL_INSTANCES[$COUNTER]} --mime="text/xml"

        # Make color replacements to each design model instance before

        # render them using Inkscape.

        if [[ ${FGCOLOR} != '000000' ]];then

            sed -i -r "s/((fill|stroke):#)000000/\1${FGCOLOR}/g" ${MODEL_INSTANCES[$COUNTER]}

        fi

        # Create list of Inkscape commands based for each design model

        # set in the configuration file.

        IMAGE_COMMANDS[${COUNTER}]="${MODEL_INSTANCES[$COUNTER]} \

            --export-id=${EXPORTID} \

            --export-png=${IMAGE_INSTANCES[$COUNTER]}  \

            --export-background=$(echo ${BGCOLOR} | cut -d'-' -f1) \

            --export-background-opacity=$(echo ${BGCOLOR} | cut -d'-' -f2) \

            --export-height=${HEIGHT}"

        # Create PNG image based on design models.

        inkscape ${IMAGE_COMMANDS[$COUNTER]} > /dev/null

        COUNTER=$(( $COUNTER + 1 ))

    done

    cli_printMessage "${OUTPUT}" --as-creating-line

    # Verify existence of output directory.

    if [[ ! -d $(dirname ${OUTPUT}) ]];then

        mkdir -p $(dirname ${OUTPUT})

    fi

    # Apply command to PNG images produced from design models to

    # construct the final PNG image.

    ${COMMAND} ${IMAGE_INSTANCES[*]} ${OUTPUT}

    # Remove instances to save disk space. There is no need to have

    # unused files inside the temporal directory. They would be

    # consuming space unnecessarily. Moreover, there is a remote

    # chance of name collapsing (because the huge number of files that

    # would be in place and the week random string we are putting in

    # front of files) which may produce unexpected results.

    rm ${IMAGE_INSTANCES[*]} ${MODEL_INSTANCES[*]}

    # Create path for different image formats creation using PNG image

    # extension as reference.

    local TARGET=$(echo ${OUTPUT} | sed -r "s/\.png$//")

    # Convert images from PNG to those formats specified in the

    # configuration file.

    for FORMAT in ${FORMATS};do

        cli_printMessage "${TARGET}.${FORMAT}" --as-creating-line

        convert ${OUTPUT} ${TARGET}.${FORMAT}

    done

}