apply-exif-from-filename

#!/bin/bash
# GistID: 5c5d5c1955da30ac592cab10cabf253d
set -e


LOCATION_FILE="$HOME/.config/photo-locations.csv"


print_help ()
{
    echo "Read information from file names and apply as EXIF."
    echo
    echo "Script expects for file names to have:"
    echo " - date at the beginning,"
    echo " - location name at the end, in brackets."
    echo
    echo "If locations are used, there must be a file ${LOCATION_FILE} in with three columns: location name, latitude and longitude."
    echo
    echo "Usage: $0 FILE..."
}

get_ref ()
{
    if [ "${1//.*/}" -ge 0 ]
    then
        echo "$2"
    else
        echo "$3"
    fi
}

if [ '-h' = "$1" ] || [ "--help" = "$1" ]
then
    print_help
    exit 0
fi

if [ 0 = $# ]
then
    print_help
    echo
    echo "No input files given."
    exit 64
fi

echo "Processing..."

for JPEG in "$@"
do
    printf " - %s... " "${JPEG}"

    OPTS=()

    DATE="$(
        echo "${JPEG}" | grep -oE '^[0-9]{4}(-[0-9]{2})[ T][0-9]{1,2}(:[0-9]{1,2}){2,3} ' || :
    )"
    if [ -n "${DATE}" ]
    then
        OPTS=( "${OPTS[@]}" -AllDates="${DATE}" )
    fi

    LOCATION_SUFFIX="$(
        echo "${JPEG}" | grep -oE '\([^)]*\)\.[a-z]+$'
    )"
    LOCATION="$(
        # shellcheck disable=SC2001
        echo "${LOCATION_SUFFIX}" | sed -Ee 's/^\(|\).*//g'
    )"
    if [ -n "${LOCATION}" ]
    then
        LOCATION_LATLON="$( grep "^${LOCATION}," "${LOCATION_FILE}" | cut -d, -f2-3 )"
        if [ -z "${LOCATION_LATLON}" ]
        then
            echo "location ${LOCATION} not found in ${LOCATION_FILE}"
        else
            LAT="$( echo "${LOCATION_LATLON}" | cut -d, -f1 )"
            LON="$( echo "${LOCATION_LATLON}" | cut -d, -f2 )"
        fi
    else
        LAT=
        LON=
    fi
    if [ -n "${LAT}" ] && [ -n "${LON}" ]
    then
        LAT_REF="$( get_ref "${LAT}" N S )"
        LON_REF="$( get_ref "${LON}" E W )"
        OPTS=(
            "${OPTS[@]}"
            -GPSLatitude="${LAT}"
            -GPSLatitudeRef="${LAT_REF}"
            -GPSLongitude="${LON}"
            -GPSLongitudeRef="${LON_REF}"
        )
    fi

    if [ -z "${OPTS[*]}" ]
    then
        echo "no data found in, skipping"
    else
        exiftool -overwrite_original_in_place -quiet "${OPTS[@]}" "${JPEG}"
        echo "done"
    fi
done

echo "All done."