change_photo_description

#! /usr/bin/env bash

set -eu

declare -r BASE_DIR="$(dirname "$(readlink -e "$0")")"

source "$BASE_DIR/lib/photofiles.sh"
source "$BASE_DIR/metadata/lib/iptc.sh"
source "$BASE_DIR/rawtherapee/lib/sidecar.sh"
source "$BASE_DIR/metadata/lib/jpeg_iptc.sh"
source "$BASE_DIR/metadata/lib/xmp.sh"
source "$BASE_DIR/lib/photoid.sh"
source "$BASE_DIR/util/unprotect.sh"

PATH="$BASE_DIR:$PATH"

declare -r DESCRIPTION=${1:-}
if [[ -z $DESCRIPTION ]] || [[ -f $DESCRIPTION ]]; then
    echo "[ERROR] Description parameter missing" >&2
    exit 1
fi

function set_if_xmp() {
    if is_xmp_sidecar "$1"; then
        unprotect_file_if_needed "$1"
        local photoid=$(photoid_get_from_file "$1")
        local caption=$(iptc_create_caption "$photoid" "$2")
        xmp_set_description "$1" "$caption"
        reprotect_check_file "$1"
    fi
}

function set_if_rt_sidecar_with_iptc() {
    if is_rawtherapee_sidecar "$1" && rt_sidecar_has_iptc_keywords "$1"; then
        unprotect_file_if_needed "$1"
        local photoid=$(photoid_get_from_file "$1")
        local caption=$(iptc_create_caption "$photoid" "$2")
        sidecar_set_property "$1" "IPTC" "Caption" "$caption"
        reprotect_check_file "$1"
    fi
}

function set_if_jpeg() {
    if is_output_photofile "$1"; then
        unprotect_file_if_needed "$1"
        local photoid=$(photoid_get_from_file "$1")
        local caption=$(iptc_create_caption "$photoid" "$2")
        jpeg_set_iptc "$1" "Caption" "Caption" "$caption"
        reprotect_check_file "$1"
    fi
}

shift 1
set -o pipefail

if [[ $# = 0 ]]; then
    collect_associated_files < /dev/stdin | while read -r file; do 
        set_if_xmp "$file" "$DESCRIPTION"
        set_if_rt_sidecar_with_iptc "$file" "$DESCRIPTION"
        set_if_jpeg "$file" "$DESCRIPTION"
    done
else 
    collect_associated_files "$@" | while read -r file; do
        set_if_xmp "$file" "$DESCRIPTION"
        set_if_rt_sidecar_with_iptc "$file  " "$DESCRIPTION"
        set_if_jpeg "$file" "$DESCRIPTION"
    done
fi