#! /bin/sh
#
# 	Part of kde-service-menu-pdf Version 1.0
# 	Copyright (C) 2007-2018 Giuseppe Benigno <giuseppe.benigno(at)gmail.com>
#
# 	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 3 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, see <http://www.gnu.org/licenses/>.
#

if [ ${#} -eq 0 ] || [ "${1}" = "-h" ] || [ "${1}" = "--help" ]; then
	echo
	echo "USE:\t\t${0##*/} dpi-type files"
	echo
	echo "dpi-type:\tdpi 300, dpi 600, custom, advanced"
	echo "files:\t\tfile1 file2 ..."
	echo
	echo "example:\t${0##*/} dpi 300 /home/user/file1.pdf /home/user/file2.pdf"
	echo
	exit 0
fi

action="${1}"
shift

#### languages strings messages #################
# Syntax for strings name is: msg_[$action]_$window_[$section]
# For languages as sr@Latn use srLatn

load_language_en () {
	msg_alert_pdf2djvu_not_found_title="Component not found"
	msg_alert_pdf2djvu_not_found_text="Software pdf2djvu not found!"

	msg_png_dpi_title="Document resolution"
	msg_png_dpi_text="Please write DPI resolution for the document. Right range values is from 75 to 6000. Default is 300 DPI."

	msg_options_title="Advanced options"
	msg_options_text="Advanced options"
	msg_options_monochrome="Render as monochrome bitmaps."
	msg_options_no_metadata="Don´t extract the metadata."
	msg_options_noHyperlinks="Don´t extract hyperlinks."

	msg_alert_overwrite_title="Overwrite all?"
	msg_alert_overwrite_text="One or more destination files exist! Overwrite all?"
	msg_save_file_title="Save document"

	msg_finish_title="Conversion of document \"${file_name}\""
	msg_finish_ok="Done."
	msg_finish_error="An error has occurred."
	msg_file_not_found="File not found."
}

load_language_fr () {
	msg_png_dpi_title="Résolution du document"
	msg_png_dpi_text="Saisissez la résolution DPI pour le document. Les valeurs vont de 75 à 6000. La résolution par défaut est de 300 DPI."

	msg_options_title="Options avancées"
	msg_options_text="Options avancées"
	msg_options_monochrome="Rendu bitmaps monochrome"
	msg_options_no_metadata="Ne pas extraire les métadonnées."
	msg_options_noHyperlinks="Ne pas extraire les hyperliens."

	msg_alert_overwrite_title="Tout écraser?"
	msg_alert_overwrite_text="Un ou plusieurs fichiers de destination existe! Tout écraser?"
	msg_save_file_title="Sauver le document"

	msg_finish_title="Conversion du document \"${file_name}\""
	msg_finish_ok="Terminée."
	msg_finish_error="Une erreur est survenue."
	msg_file_not_found="Fichier non trouvé."
}

load_language_it () {
	msg_alert_pdf2djvu_not_found_title="Componente non trovato"
	msg_alert_pdf2djvu_not_found_text="Il software pdf2djvu non è stato trovato!"

	msg_png_dpi_title="Risoluzione"
	msg_png_dpi_text="Pre favore scrivi la risoluzione voluta per il documento finale. Valori validi sono compresi tra 75 e 6000. 300 DPI è il valore predefinito."

	msg_options_title="Opzioni avanzate"
	msg_options_text="Opzioni avanzate"
	msg_options_monochrome="Renderizza come immagini monocromatiche"
	msg_options_no_metadata="Non estrarre i metadati."
	msg_options_noHyperlinks="Non estrarre i collegamenti ipertestuali."

	msg_alert_overwrite_title="Sovrascrivi tutti?"
	msg_alert_overwrite_text="Uno o più file destinazione esistono già! Sovrascriverli tutti?"
	msg_save_file_title="Salva documento"

	msg_finish_title="Conversione del documento \"${file_name}\""
	msg_finish_ok="Conclusa."
	msg_finish_error="Si è verificato un errore."
	msg_file_not_found="File non trovato."
}

load_language_ru () {
	msg_png_dpi_title="Разрешение документа"
	msg_png_dpi_text="Пожалуйста, напишите DPI разрешение для документа. Правильный диапазон значений от 75 до 6000. По умолчанию 300 DPI."

	msg_options_title="Дополнительные настройки"
	msg_options_text="Дополнительные настройки"
	msg_options_monochrome="Рендер как монохромные растровые изображения."
	msg_options_no_metadata="Не извлекать метаданные."
	msg_options_noHyperlinks="Не извлекать гиперссылки."

	msg_alert_overwrite_title="Перезаписать все?"
	msg_alert_overwrite_text="Один или несколько файлов назначения существуют! Перезаписать все?"
	msg_save_file_title="Сохранить документ"

	msg_finish_title="Преобразование документа \"${file_name}\""
	msg_finish_ok="Готово."
	msg_finish_error="Произошла ошибка."
	msg_file_not_found="Файл не найден."
}

load_language () {
	## Load localized strings AFTER english strings
	## - if localized strings not found use english for default
	## - if localized strings are incomplete use english only fot missing strings :-)
	load_language_en && [ "${lang}" != "en" ] && load_language_${lang}
}

lang=${LANGUAGE%%:*}
type load_language_${lang} > /dev/null || lang='en'
load_language

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

kdialog_bin=$(which kdialog)
[ -z "${kdialog_bin}" ] && echo "kdialog not found!" && exit 1

pdf2djvu_bin=$(which pdf2djvu)
[ -z "${pdf2djvu_bin}" ] && "${kdialog_bin}" --title "${msg_alert_pdf2djvu_not_found_title}" --icon configure --error "${msg_alert_pdf2djvu_not_found_text}" && exit 2

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

dpi () {
	dpi=$1
	shift
	options=" "
	advanced "${@}"
}

custom () {
	options=" "
	advanced "${@}"
}

advanced () {
	if [ $# -gt 1 ]; then
		multi_selection="true"
	else
		unset multi_selection
	fi

	if [ ! "$options" ]; then
		options=$("${kdialog_bin}" --title "${msg_options_title}" --icon configure --checklist "${msg_options_text}" __monochrome "${msg_options_monochrome}" off __no-metadata "${msg_options_no_metadata}" off __no-hyperlinks "${msg_options_noHyperlinks}" off --separate-output) || exit 0
		options=$(echo ${options} | sed 'y/_/-/')
	fi

	[ ! "$dpi" ] && { dpi=$("${kdialog_bin}" --title "${msg_png_dpi_title}" --icon configure --inputbox "${msg_png_dpi_text}" "300") || exit 0; }

	while [ $# -ne 0 ]; do
		## Input files must have absolute path!
		work_dir="${1%/*}"; [ ! -d "${work_dir}" ] && work_dir="$(pwd)"
		file_name="${1##*/}"
		base_file_name="${file_name%.*}"

		## Reload language strings with current variables
		load_language

		output_file_name="${base_file_name} (${dpi} dpi).djvu"
		if [ -e "${output_file_name}" ]; then
			if [ "$multi_selection" ]; then
				if [ ! "${overwrite_all}" ]; then		# if ${overwrite_all} is unset
					"${kdialog_bin}" --title "${msg_alert_overwrite_title}" --icon document-save-all --yesnocancel "${msg_alert_overwrite_text}"
					case "$?" in
						0)	overwrite_all="true";;		# click on Yes
						1)	overwrite_all="false";;		# click on No
						2)	exit 0;;						# click on Cancel
						esac
				fi
				if [ "${overwrite_all}" = "false" ]; then
					output_file_name=$("${kdialog_bin}" --title "${msg_save_file_title}" --icon document-save --getsavefilename "${work_dir}/${base_file_name}.djvu" image/vnd.djvu) || exit 0
				fi
			else
				output_file_name=$("${kdialog_bin}" --title "${msg_save_file_title}" --icon document-save --getsavefilename "${work_dir}/${base_file_name}.djvu" image/vnd.djvu) || exit 0
			fi
		fi

		[ ! -f "${work_dir}/${file_name}" ] && shift && "${kdialog_bin}" --title "${msg_finish_title}" --passivepopup "${msg_file_not_found}" 5 && continue
		${pdf2djvu_bin} -o "${output_file_name}" --dpi="${dpi}" ${options} "${1}" && \
		"${kdialog_bin}" --title "${msg_finish_title}" --passivepopup "${msg_finish_ok}" 5 || \
		"${kdialog_bin}" --title "${msg_finish_title}" --passivepopup "${msg_finish_error}" 5

		shift
	done
}

#### main

"${action}" "${@}" && exit 0
