sclass Text {
  S title;
  new L<S> lines;
}

static L<Text> loadPoems() {
  new L<Text> texts;

  L<Snippet> snippets = listSnippetsOfType(48); // "Natural Language"
  
  for (Snippet sn : snippets) pcall {
    if (parseSnippetID(sn.id) < 1003000) break;
    texts.addAll(loadPoems(sn.id));
  }
  
  print("Got " + n(l(texts), "text") + " (" + structure(collect(texts, "title")) + ")");
  ret texts;
}

static L<Text> loadPoems(S snippetID) {
  new L<Text> texts;

  L<S> lines = toLinesFullTrim(loadSnippet(snippetID));

  int i = 0;
  while (i < l(lines)) {
    new Text text;
    
    // title
    if (i+1 < l(lines) && lines.get(i+1).startsWith("-")) {
      text.title = lines.get(i);
      i += 2;
    } else
      text.title = "";
      
    // text
    while (i < l(lines) &&
      (i+1 >= l(lines) || !lines.get(i+1).startsWith("-")))
      text.lines.add(lines.get(i++));
    texts.add(text);
  }
  
  ret texts;
}