change entry meta in twentytwelve child theme

I have a twentytwelve child theme that I’d like to change the entry meta layout of – from:
Posted in category names on October 2, 2012 by author’s name

to:
Posted July 27, 2012 by Author’s name | Category 1, Category 10 (Parmalink:http://www.somewebsite.com/post-15/)

notice the date is first (and the format), there’s a pipe after author and the permalink is there. I am looking at this `function twentytwelve_entry_meta() {
// Translators: used between list items, there is a space after the comma.
$categories_list = get_the_category_list( __( ‘, ‘, ‘twentytwelve’ ) );

// Translators: used between list items, there is a space after the comma.
$tag_list = get_the_tag_list( ”, __( ‘, ‘, ‘twentytwelve’ ) );

$date = sprintf( ‘<a href=”%1$s” title=”%2$s” rel=”bookmark”><time class=”entry-date” datetime=”%3$s” pubdate>%4$s</time></a>’,
esc_url( get_permalink() ),
esc_attr( get_the_time() ),
esc_attr( get_the_date( ‘c’ ) ),
esc_html( get_the_date() )
);

$author = sprintf( ‘<span class=”author vcard”><a class=”url fn n” href=”%1$s” title=”%2$s” rel=”author”>%3$s</a></span>’,
esc_url( get_author_posts_url( get_the_author_meta( ‘ID’ ) ) ),
esc_attr( sprintf( __( ‘View all posts by %s’, ‘twentytwelve’ ), get_the_author() ) ),
get_the_author()
);
` but I don’t understand it completely