Script for combining photos and metadata from Facebook data dumps

fb-photo.sh

#!/usr/bin/env bash

set -euo pipefail
export LANG=C

ensure_valid() {
	if [[ -z "${!1}" ]]
	then
		echo "Variable ${1} is empty"
		exit 1
	fi

	if [[ "${!1}" == "null" ]]
	then
		echo "Variable ${1} is 'null'"
		exit 1
	fi
}

for album in $(ls photos_and_videos/album/*.json)
do
	name=$(jq -r .name < $album)
	ensure_valid name

	photos_count=$(($(jq '.photos | length' < $album) - 1))
	for i in $(seq 0 $photos_count)
	do
		filename=$(jq -r ".photos[${i}].uri" < $album)
		output="out/${name}/$(basename "${filename}")"

		[[ -f "${output}" ]] && continue

		description=$(jq -r ".photos[${i}].description" < $album)
		timestamp=$(jq -r ".photos[${i}].creation_timestamp" < $album)
		comments_json=$(jq -r ".photos[${i}].comments" < $album)

		ensure_valid filename
		ensure_valid timestamp

		if [[ "${description}" == "null" ]]
		then
			description=
		fi

		comments=
		if [[ "${comments_json}" != "null" ]]
		then
			comments_count=$(($(jq length <<< $comments_json) - 1))
			for i in $(seq 0 $comments_count)
			do
				ctimestamp=$(jq -r ".[${i}].timestamp" <<< "${comments_json}")
				cauthor=$(jq -r ".[${i}].author" <<< "${comments_json}")
				ccomment=$(jq -r ".[${i}].comment" <<< "${comments_json}")

				comments="${comments}"$'\n'"\"${ccomment}\" -${cauthor} ($(date --date="@${ctimestamp}" '+%F %r'))"
			done
		fi

		exiftool -m -out "${output}" -ImageDescription="${description}${comments}" -CreateDate="$(date --rfc-3339=seconds --date="@${timestamp}")" "${filename}"
	done
done

video_count=$(($(jq -r '.videos | length' < photos_and_videos/your_videos.json) - 1))
for i in $(seq 0 $video_count)
do
	filename=$(jq -r ".videos[${i}].uri" < photos_and_videos/your_videos.json)
	timestamp=$(jq -r ".videos[${i}].creation_timestamp" < photos_and_videos/your_videos.json)

	echo $filename
	out="out/videos/$(basename "${filename}")"
	cp "${filename}" "${out}"
	touch --date "$(date --rfc-3339=seconds --date="@${timestamp}")" "${out}"
done