googlephotos

#!/usr/bin/env bash

#######################################################################
# Made by    : Ewoud Dronkert
# Licence    : GNU GPL v3
# Platform   : macOS
# Requires   : Bash, xattr
# Location   : ~/bin/
# Name       : googlephotos
# Version    : 1.1.3
# Date       : 2017-12-15
# Purpose    : Align timestamps with file names for phone photos and
#              other image files in Google Drive. Also set file mode to
#              0600 and remove macOS extended attributes. Then copy
#              all files and subdirectories to a backup directory.
# Parameters : none
# Settings   : MONTHS = how many recent months to process
#              LOCALNAME = localised name of the Google Photos subdir
#              BAK = backup directory
#######################################################################

MONTHS=6
LOCALNAME="Google Foto's"
DRV=~/"Google Drive/$LOCALNAME"
BAK=~/"Pictures/$LOCALNAME"

# Correct timestamps of Motorola Moto G3 photos
function gp_moto_img () {
	local f
	local t
	for f in "$1"/IMG_[12][0-9][0-9][0-9][01][0-9][0-3][0-9]_[0-2][0-9][0-5][0-9][0-5][0-9]*.jpg; do
		if [ -f "$f" ]; then
			t=${f##*/}
			t=${t:4:15}
			t=${t/_/}
			DAY=${t:0:8}
			(( DAY <= TODAY )) && touch -t ${t:0:12}.${t:12:2} "$f"
		fi
	done
}

# Correct timestamps of Motorola Moto G3 videos
function gp_moto_vid () {
	local f
	local t
	for f in "$1"/VID_[12][0-9][0-9][0-9][01][0-9][0-3][0-9]_[0-2][0-9][0-5][0-9][0-5][0-9]*.mp4; do
		if [ -f "$f" ]; then
			t=${f##*/}
			t=${t:4:15}
			t=${t/_/}
			DAY=${t:0:8}
			(( DAY <= TODAY )) && touch -t ${t:0:12}.${t:12:2} "$f"
		fi
	done
}

# Correct timestamps of Samsung Galaxy photos and videos
function gp_sammy_cam () {
	local f
	local t
	for f in "$1"/[12][0-9][0-9][0-9][01][0-9][0-3][0-9]_[0-2][0-9][0-5][0-9][0-5][0-9]*.[jm]p[g4]; do
		if [ -f "$f" ]; then
			t=${f##*/}		# delete everything until last slash (much faster than `basename`)
			t=${t:0:15}		# take first 15 chars (full date, underscore, time incl. seconds)
			t=${t/_/}		# remove underscore
			DAY=${t:0:8}		# full date part of the name
			(( DAY <= TODAY )) && touch -t ${t:0:12}.${t:12:2} "$f"
		fi
	done
}

# Correct timestamps of Adobe Lightroom Mobile exports
function gp_lrm_export () {
	local f
	local t
	for f in "$1"/LRM_EXPORT_[12][0-9][0-9][0-9][01][0-9][0-3][0-9]_[0-2][0-9][0-5][0-9][0-5][0-9]*.jpg; do
		if [ -f "$f" ]; then
			t=${f##*/}
			t=${t:11:15}
			t=${t/_/}
			DAY=${t:0:8}
			(( DAY <= TODAY )) && touch -t ${t:0:12}.${t:12:2} "$f"
		fi
	done
}

# Correct timestamps of Android screenshots
function gp_screenshot () {
	local f
	local t
	for f in "$1"/Screenshot_[12][0-9][0-9][0-9][01][0-9][0-3][0-9]-[0-2][0-9][0-5][0-9][0-5][0-9]*.png; do
		if [ -f "$f" ]; then
			t=${f##*/}
			t=${t:11:15}
			t=${t/-/}
			DAY=${t:0:8}
			(( DAY <= TODAY )) && touch -t ${t:0:12}.${t:12:2} "$f"
		fi
	done
}

# Correct timestamps of JPEGs from Signal
function gp_signal () {
	local f
	local t
	for f in "$1"/signal-[12][0-9][0-9][0-9]-[01][0-9]-[0-3][0-9]-[0-2][0-9][0-5][0-9][0-5][0-9]*.jpg; do
		if [ -f "$f" ]; then
			t=${f##*/}
			t=${t:7:17}
			t=${t//-/}
			DAY=${t:0:8}
			(( DAY <= TODAY )) && touch -t ${t:0:12}.${t:12:2} "$f"
		fi
	done
}

# Correct timestamps of JPEGs from WhatsApp
function gp_whatsapp () {
	local f
	local t
	for f in "$1"/IMG-[12][0-9][0-9][0-9][01][0-9][0-3][0-9]-WA*.jpg; do
		if [ -f "$f" ]; then
			t=${f##*/}
			t=${t:4:8}000000
			DAY=${t:0:8}
			(( DAY <= TODAY )) && touch -t ${t:0:12}.${t:12:2} "$f"
		fi
	done
}

# Correct timestamps of JPEGs with date/time filename
function gp_datetime () {
	local f
	local t
	for f in "$1"/[12][0-9][0-9][0-9]-[01][0-9]-[0-3][0-9]_[0-2][0-9]-[0-5][0-9]-[0-5][0-9]*.jpg; do
		if [ -f "$f" ]; then
			t=${f##*/}
			t=${t/_/}
			t=${t//-/}
			DAY=${t:0:8}
			(( DAY <= TODAY )) && touch -t ${t:0:12}.${t:12:2} "$f"
		fi
	done
}

# Correct timestamps of JPEGs with date-only filename
function gp_dateonly () {
	local f
	local t
	for f in "$1"/[12][0-9][0-9][0-9]-[01][0-9]-[0-3][0-9].jpg; do
		if [ -f "$f" ]; then
			t=${f##*/}
			t=${t//-/}
			t=${t:0:8}000000
			DAY=${t:0:8}
			(( DAY <= TODAY )) && touch -t ${t:0:12}.${t:12:2} "$f"
		fi
	done
}

# Correct timestamps of known files
function adjustfiletime () {
	[ -z "$1" ] && return
	[ ! -d "$1" ] && return

	gp_moto_img "$1"
	gp_moto_vid "$1"
	gp_sammy_cam "$1"
	gp_lrm_export "$1"
	gp_screenshot "$1"
	gp_signal "$1"
	gp_whatsapp "$1"
	gp_datetime "$1"
	gp_dateonly "$1"
}

echo
echo "Backup of Google Photos for the last six months"
echo "From Photo directory : $DRV"
echo "To backup directory  : $BAK"

[ ! -d "$DRV" ] && echo "Folder not found: \"$DRV\"" >&2 && exit 1
[ ! -d "$BAK" ] && mkdir -p "$BAK"
[ ! -d "$BAK" ] && echo "Could not create folder \"$BAK\"" >&2 && exit 2

Y=$(date +%Y)
M=$(date +%m)
TODAY=$(date +%Y%m%d)

for (( i = 0; i < MONTHS; ++i )); do

	echo
	date -j "${M}150000$Y" +'%B %Y' | sed 's/./\t\u&/'
	echo

	SRC="$DRV/$Y/$M"
	DST="$BAK/$Y/$M"

	if [ -d "$SRC" ]; then
		echo -n 'Correcting date/time of files in source directory ... '
		xattr -rc "$SRC"
		chmod 600 "$SRC"/*
		adjustfiletime "$SRC"
		echo 'done'
	fi

	[ ! -d "$DST" ] && mkdir -p "$DST"
	if [ -d "$SRC" -a -d "$DST" ]; then
		rsync -av --size-only "$SRC/" "$DST/"
	fi

	if [ -d "$DST" ]; then
		echo -n 'Correcting date/time of files in destination directory ... '
		xattr -rc "$DST"
		chmod 600 "$DST"/*
		adjustfiletime "$DST"
		echo 'done'
	fi

	if [ "$M" = "01" ]; then
		M=12
		(( --Y ))
	else
		M=${M/#0/}
		(( --M ))
		(( M < 10 )) && M=0$M
	fi

	if (( i == 0 )); then
		open "$DST"
	fi

done

echo
exit 0