fix_creationdate_googlephotos

#Find photos in "./GoogleDrive" folder with the format IMG_XXXYYZZ_KKLLMM.NNN.jpg and set their original taken date (if missing). This can be helpful if you want to import bulk photos to a photo manager (e.g. QNAP photostation)

#!/bin/bash
OIFS="$IFS"
IFS=$'\n'
for f in $(find ./GoogleDrive/* -name '*.jpg'); do
	if [[ "$f" == *"__thumb"* ]]; then
		true
	else
		if [[ "$f" == *"IMG_"* ]]; then
			echo "$f"
			check=$(exiftool -xmp:dateTimeOriginal "$f")
			if [ "${check}" = "" ]; then
			    echo "does not have datetime"
			    cleaned=$( echo "$f" | awk -F'[/]' '{print $(NF)}')
			    createdname=$(echo "$cleaned" | sed -r 's/IMG_(.{4})(.{2})(.{2})_(.{2})(.{2})(.{2})(.*)/\1:\2:\3 \4:\5:\6/')
			    echo "${createdname}"
			    mypattern="^.{4}:.{2}:.{2} .{2}:.{2}:.{2}$"
				if [[ ${createdname} =~ $mypattern ]]; then 
					echo "Matches!" 
					exiftool -xmp:dateTimeOriginal="$createdname" "$f"
				fi
			else
				true;
			fi
		fi
	fi
done
IFS="$OIFS"