Bash script to iterate over set of images, setting creation date

exif.sh

#!/bin/bash

# Whatsapp 'WhatsApp Image 2020-08-13 at 21.06.23.jpeg'
for file in ./*.jpeg; do
    echo " > $file"
    year=${file:17:4}
    month=${file:22:2}
    day=${file:25:2}
    hour=${file:31:2}
    minute=${file:34:2}
    second=${file:37:2}
    
    date="$year-$month-$day $hour:$minute:$second+02:00"

    exiftool -overwrite_original -MediaCreateDate="$date" -CreateDate="$date" -TrackCreateDate="date" -DateTimeOriginal="$date" "$file"
    mv "$file" "whatsapp_$year-$month-${day}_$hour-$minute-$second.jpg"
    echo " -> date $year-$month-$day $hour:$minute:$second chosen."
done

DATE="2015-10-12"

# write creation date into EXIF meta data
for file in ./*; do
    echo " > $file"
    read -i "$DATE" -e DATE
    exiftool -overwrite_original -DateTimeOriginal="$DATE 12:00:00+02:00" -CreateDate="$DATE 12:00:00+02:00" ${file}
    echo " -> date $DATE chosen."
done

# MOV files have different keys..
for file in ./*.mov; do
    echo " > $file"
    read -i "$DATE" -e DATE
    exiftool -overwrite_original -CreationDate="$DATE 12:00:01+02:00" -MediaCreateDate="$DATE 12:00:01+02:00" ${file}
    echo " -> date $DATE chosen."
done

# PNG does not have exif date, change modified date with `touch`
for file in ./*.png; do
    echo " > $file"
    PNGDATE=$(exiftool -s -s -s -d "%Y%m%d%H%M.%S" -DateTimeOriginal ${file})
    touch -t ${PNGDATE} ${file}
    echo " -> date $PNGDATE chosen."
done