#! /bin/zsh

ooa-suffix () { echo "-ooa" }

ooa () {
    local -a files
    files=($@)
    local name
    local ext
    for f in $files; do
        name=${f:r}
        ext=${f:e}
        mv $f ${name}`ooa-suffix`.${ext}
    done
}

de-ooa () {
    local -a files
    files=($@)
    for f in $files; do
        mv $f ${f//`ooa-suffix`/}
    done
}