#!/bin/bash

# Simple script to convert html <-> markdown

main() {
    if [[ ! ( "$1" == *.md || "$1" == *.html ) ]]; then
        echo "must provide *.md or *.html"
        exit 1
    fi

    IFS=$'\n' read -d "" -ra tokens <<< "${1//./$'\n'}"

    input=""
    output=""

    case ${tokens[1]} in
        md)
            input="${tokens[0]}.md"
            output="${tokens[0]}.html"
            ;;
        html)
            input="${tokens[0]}.html"
            output="${tokens[0]}.md"
            ;;
    esac

    pandoc --from gfm --to html --standalone --output $output < $input
}

main "$@"