Guess iptc encoding

check_iptc_encoding

#!/bin/bash

set -e

exec 3>&1 # make stdout available as fd 3 for the result
exec 1>&2 # redirect all output to stderr for logging

image=$1
debug='n'
# Check if the first parameter was '-v' then we check for the image in
# the second parameter and enable debugging.
if [ "${image}" == '-v' ]; then
    image="${2}"
    debug='y'
fi

# Check if we got an image
if [ -z "$image" ]; then
    echo "usage: ${0} [-v] <path/to/image>"
    exit 1
fi

# Yay! Table driven testing in bash!
# Its really only the first one that's a real case, the other
# ones are just there to illustrate the point.
# The fields are iptcEncoding,template,contains
table=$(cat <<EOF
mac,\$copyrightnotice,BILDBYRÅN
mac,\$caption-abstract,Göteborg
mac,\$city,Malmö
EOF
     )

# Iterate over the rows to see if we get a hit
echo "${table}" | while IFS="," read iptcEnc template contains
do
    # run exiftool with the print format template (-m ignores minor errors like
    # the referenced field not being defined)
    result=$(exiftool -m -charset iptc=${iptcEnc} -p ${template} ${image})
    # ...check if the test case string is in our result
    if [[ "${result}" == *"${contains}"* ]]; then
        if [ $debug == "y" ]; then
            # print som info on the match if we're running with a debug flag
            echo identified iptc charset \"$iptcEnc\" from test-case \"$template\" contains \"$contains\"
        fi
        # return the detected encoding and exit
        echo $iptcEnc >&3
        exit 0
    fi
done

usage.sh

encParam=""
iptcEnc=$(./check_iptc_encoding -v ${1})
if [ ! -z "${iptcEnc}" ]; then
    encParam="-charset iptc=${iptcEnc}"
fi
exiftool -j ${encParam} $1