summarize.js

// Pull all lines with "<emoji> :" together, create headers with a "## <emoji>"
// and list the grepped lines after.

// this is the heading the summary will appear under.
// use something uncommon.
var magic_header = "Auto Summary";

var emoji_regex = /(?:- )?(\u00a9|\u00ae|[\u2000-\u3300]|\ud83c[\ud000-\udfff]|\ud83d[\ud000-\udfff]|\ud83e[\ud000-\udfff]).* ?: ?(.*)/g;

var highlights = {};
var content = draft.content;

var match = emoji_regex.exec(content);

var pushNew = function(obj, key, string) {
  if (typeof obj[key] === typeof undefined) {
    obj[key] = [string];
  } else {
    obj[key].push(string);
  }
}

var automateHighlights = function(highlights) {
  var result = "\n\n## " + magic_header + "\n\n";

  for (let emoji in highlights) {
    if (!emoji.match(/…|“|”|’/)) {
      result = result + "### " + emoji + "\n\n";
      for (let index in highlights[emoji]) {
        result = result + "- " + highlights[emoji][index] + "\n";
      }
      result = result + "\n"
    }
  }

  return result;
}

while (match != null) {
  pushNew(highlights, match[1], match[2]);
  match = emoji_regex.exec(content);
}

if (draft.content.match("## " + magic_header)) {
  console.log("already ran!")
}
else {
  draft.content = draft.processTemplate("[[title]]")
                      + automateHighlights(highlights)
                      + draft.processTemplate("[[body]]");

  draft.update();
}