reverse markdown from pnut entities

reverse_markdown.md

Setup

This is pseudocode.

post has been retrieved from the API.

Be sure to make substrings and other string operations by "multibyte" divisions.

Operation

text = post.text;
entities = post.entities;

diff = 0;
entities.links = reverse entities.links;
for entities.links as link
  if link.amended_len exists
    text = (substring of text from position 0 to (link.pos + diff)) and '[' and link.text and '](' and link.link and ')' and (substring of text from (link.pos+diff+link.amended_len) until the end)
    diff += link.amended_len - link.len;

text is the original, now.