discourse/plugins/discourse-local-dates/assets/javascripts/lib/discourse-markdown/discourse-local-dates.js.es6

import { parseBBCodeTag } from "pretty-text/engines/discourse-markdown/bbcode-block";

function addLocalDate(buffer, matches, state) {
  let token;

  let config = {
    date: null,
    time: null,
    timezone: null,
    format: null,
    timezones: null,
    displayedZone: null
  };

  let parsed = parseBBCodeTag(
    "[date date" + matches[1] + "]",
    0,
    matches[1].length + 11
  );

  config.date = parsed.attrs.date;
  config.format = parsed.attrs.format;
  config.calendar = parsed.attrs.calendar;
  config.time = parsed.attrs.time;
  config.timezone = parsed.attrs.timezone;
  config.recurring = parsed.attrs.recurring;
  config.timezones = parsed.attrs.timezones;
  config.displayedZone = parsed.attrs.displayedZone;

  token = new state.Token("span_open", "span", 1);
  token.attrs = [
    ["class", "discourse-local-date"],
    ["data-date", state.md.utils.escapeHtml(config.date)]
  ];

  let dateTime = config.date;
  if (config.time) {
    token.attrs.push(["data-time", state.md.utils.escapeHtml(config.time)]);
    dateTime = `${dateTime} ${config.time}`;
  }

  if (config.format) {
    token.attrs.push(["data-format", state.md.utils.escapeHtml(config.format)]);
  }

  if (config.calendar) {
    token.attrs.push([
      "data-calendar",
      state.md.utils.escapeHtml(config.calendar)
    ]);
  }

  if (config.displayedZone) {
    token.attrs.push([
      "data-displayed-zone",
      state.md.utils.escapeHtml(config.displayedZone)
    ]);
  }

  if (config.timezones) {
    token.attrs.push([
      "data-timezones",
      state.md.utils.escapeHtml(config.timezones)
    ]);
  }

  if (config.timezone) {
    token.attrs.push([
      "data-timezone",
      state.md.utils.escapeHtml(config.timezone)
    ]);
    dateTime = moment.tz(dateTime, config.timezone);
  } else {
    dateTime = moment.utc(dateTime);
  }

  if (config.recurring) {
    token.attrs.push([
      "data-recurring",
      state.md.utils.escapeHtml(config.recurring)
    ]);
  }

  buffer.push(token);

  let emailPreview;
  const emailTimezone = (config.timezones || "Etc/UTC").split("|")[0];
  const formattedDateTime = dateTime.tz(emailTimezone).format(config.format);
  const formattedTimezone = emailTimezone.replace("/", ": ").replace("_", " ");

  if (formattedDateTime.match(/TZ/)) {
    emailPreview = formattedDateTime.replace("TZ", formattedTimezone);
  } else {
    emailPreview = `${formattedDateTime} (${formattedTimezone})`;
  }
  token.attrs.push(["data-email-preview", emailPreview]);

  token = new state.Token("text", "", 0);
  token.content = dateTime.utc().format(config.format);
  buffer.push(token);

  token = new state.Token("span_close", "span", -1);

  buffer.push(token);
}

export function setup(helper) {
  helper.whiteList([
    "span.discourse-local-date",
    "span[data-*]",
    "span[title]"
  ]);

  helper.registerOptions((opts, siteSettings) => {
    opts.features[
      "discourse-local-dates"
    ] = !!siteSettings.discourse_local_dates_enabled;
  });

  helper.registerPlugin(md => {
    const rule = {
      matcher: /\[date(.+?)\]/,
      onMatch: addLocalDate
    };

    md.core.textPostProcess.ruler.push("discourse-local-dates", rule);
  });
}