#
# Parental-Rating  Recording Action Hook
# --------------------------------------
#
# Parameter 1 can have the values "before", "after" and "edited", depending
# on whether the recording hook is called before the recording starts,
# after the recording ends or after the recording has been edited.
#
# Parameter 2 is the directory of the recording. Be aware, that this directory 
# doesn't exist before the recording starts.
#

HOOK="R10.parental-rating"
LOG="/usr/bin/logger -t recording-hook"
$LOG "$HOOK $@"

case $1 in
    before)
        # nothing to do - recording directory not yet created
        ;;
    after | edited)
        # extract a literally provided parental rating from the subtitle 
        # and add its "R" tag in the recording info
        rec="$2"
        info="$rec/info"
        orig="$info.orig"
        temp="$info.temp"
        # extract the parental rating from the subtitle
        sline="$( cat "$info" | grep "^S" | tail -1 | cut -c 3- )"
        rating="$( echo "$sline" | sed 's/^.*\(Altersfreigabe[: ]*ab *[0-9][0-9]*\).*$/\1/' )"
        age="$( echo "$rating" | sed 's/^.*Altersfreigabe[: ]*ab *\([0-9][0-9]*\).*$/\1/' | sed 's/^.*Altersfreigabe[: ]*[Kk]eine .*[Ff]reigabe.*$/18/' )"
        if [ "${age//[0-9]/}" = "" -a "$age" != "$rating" ]
        then
            $LOG "$HOOK" "age = $age"
            # save the original recording info or preserve an earlier copy
            [ -f "$orig" ] || cp -p "$info" "$orig"
            # enter the extracted rating and the subtitle without rating
            cat "$info" | grep -v "^[SR]" > "$temp"
            echo "S $( echo $sline | sed 's/'"$rating"'//' | sed 's/  */ /g' | sed 's/  *$//' )" >> "$temp"
            echo "R $age" >> "$temp"
            # replace the previous recording info by the modified one
            mv -f "$temp" "$info"
            # trigger a rescan of the recordings
            path=""
            OLDIFS="$IFS"
            IFS=/ dirs=(${rec%\/[^\/]*\/[^\/]*})
            IFS="$OLDIFS"
            for dir in "${dirs[@]}" x y
            do
                [ -z $dir ] || path="$path/$dir"
                if [ -f "$path/.update" ]
                then
                    $LOG "$HOOK" "triggering rescan of recordings"
                    touch "$path/.update"
                    break
                fi
            done
        fi
        ;;
esac