#!/bin/bash

# Relational pipes
# Copyright © 2020 František Kučera (Frantovo.cz, GlobalCode.info)
#
# 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, version 3 of the License.
#
# 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/>.


# This streamlet provides a single attribute: date of given file.
# It calls the stat and date commans.


. "$(dirname "$(realpath "$0")")/streamlet-common.sh"

processMessage_WAITING_FOR_OUTPUT_ATTRIBUTES_METADATA() {
	send OUTPUT_ATTRIBUTE_METADATA "${outputAttributeAliases[0]-date}"    "string"
	send WAITING_FOR_INPUT_ATTRIBUTES
}

processMessage_WAITING_FOR_OUTPUT_ATTRIBUTES() {
	timestamp=$(stat --format="%Y" "$currentFile");
	value=$(date --iso-8601=s --date="@$timestamp");
	send OUTPUT_ATTRIBUTE "$value"    "false";
	send WAITING_FOR_INPUT_ATTRIBUTES;
}

initialize
processMessages