reformat-date-filename.sh

#!/bin/bash

# Copyright (c) 2021, lowkey digital studio
# Author: Nathan Wolek
# Usage of this file and its contents is governed by the MIT License

# BEGUN - 8 March 2021
# GOAL - reformat the WAV filename to expected format for other scripts
# used rename-by-date.sh as starting point
# Example of input filename - 20200406_040000.WAV
# Example of desired format - 2020-04-06-04-00-00-UTC.wav
# expected input .WAV files (upper case extension) produced by the AudioMoth
# expected output .wav files (lower case extension)

# make directory for output
if [ ! -d output ]; then
	mkdir -p output
fi

# iterate through all arguments
for file in $@
do

	# Use 'stat' to get the birthdate of the file, but switch the format
	# Example of default format from stat - Apr  6 04:00:00 2020
	# Example of desired format - 2020-04-06-04-00-00-UTC

	#format='%F-%H-%M-%S-UTC'
	#birthdate=$(stat -f "%SB" -t $format $file)

	birthdate="${file:0:4}-${file:4:2}-${file:6:2}-${file:9:2}-${file:11:2}-${file:13:2}-UTC"

	# copy the original sound file and give it a new birthdate name

	cp $file output/$birthdate.wav

	# apply old attributes to the new file

	touch -r $file output/$birthdate.wav

	# touch one more time to update the modification date

	touch output/$birthdate.wav

done