/*
Plugin name: Caldera Terms shortcode
*/
function caldera_terms_shortcode_callback( $atts ) {
    $atts = shortcode_atts(
        array(
            'taxonomy' => '',
            'post' => get_the_ID(),
        ),
        $atts,
        'my_terms'
    );

    if ( ! empty( $atts[ 'taxonomy']) ) {
        $terms = wp_get_object_terms( get_the_ID(), $atts[ 'taxonomy' ] );
        $out = '<ul class="my-terms-shortcode-term-list ' . esc_attr( 'my-terms-shortcode-term-list-' . $atts[ 'taxonomy' ] ) .'">';
        foreach( $terms as $term ) {
            $out .= '<li><a href="' . get_term_link( $term->slug, $atts[ 'taxonomy' ] ) . '">' . esc_html( $term->name ) . '</a></li>';
        }
        $out .= '</ul>';

        return $out;
    }

}
add_shortcode( 'caldera_terms', 'caldera_terms_shortcode_callback' );