JIRA to Markdown inline conversions

jira-to-markdown.user.js

// ==UserScript==
// @name        JIRA to Markdown
// @namespace   https://github.com/ysamlan/
// @version     1.0
// @description Converts JIRA wiki syntax to Markdown and vice versa. Based on https://github.com/FokkeZB/J2M.
// @match       https://*.atlassian.net/*
// @grant       none
// @copyright   2015 Yoni Samlan, Apache license 2.0
// @updateURL   https://gist.githubusercontent.com/ysamlan/24d575c40caae746531e/raw

// ==/UserScript==

/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// Currently tested in Tampermonkey; not usable as a Chrome extension.

function toMarkdown(text) {
  converted = text;

  converted = converted.replace(/^h([0-6])\.(.*)$/gm, function (match,level,content) {
    return Array(parseInt(level) + 1).join('#') + content;
  });

  converted = converted.replace(/([*_])(.*)\1/g, function (match,wrapper,content) {
    var to = (wrapper === '*') ? '**' : '*';
    return to + content + to;
  });

  return converted.replace(
      /\{\{(.*?)\}\}/g, '`$1`').replace(
      /\?\?(.*?)\?\?/g, '<cite>$1</cite>').replace(
      /\{code(:([a-z]+))?\}([^]*)\{code\}/gm, '```$2$3```').replace(
      /\[(.+?)\|(.+)\]/g, '[$1]($2)');
}

function toJira(text) {
  converted = text;

  converted = converted.replace(/^(.*?)\n([=-])+$/gm, function (match,content,level) {
    return 'h' + (level[0] === '=' ? 1 : 2) + '. ' + content;
  });

  converted = converted.replace(/^([#]+)(\s+.*?)$/gm, function (match,level,content) {
    return 'h' + level.length + '.' + content;
  });

  converted = converted.replace(/([*_]+)(.*?)\1/g, function (match,wrapper,content) {
    var to = (wrapper.length === 1) ? '_' : '*';
    return to + content + to;
  });

  return converted.replace(
      /<cite>(.*?)<\/cite>/g, '??$1??').replace(
      /\{code(:([a-z]+))?\}([^]*)\{code\}/gm, '```$2$3```').replace(
      /`(.*?)`/g, '{{$1}}').replace(
      /\[(.+?)\]\((.+)\)/g, '[$1|$2]')
}

function toJiraHandler() {
    jQuery(this).text('To Markdown');
    container = jQuery(this).closest('.wiki-edit');
    jQuery(container).find('textarea.wiki-textfield')[0].value = toJira(jQuery(container).find(
      'textarea.wiki-textfield')[0].value);
    jQuery(container).find('.wiki-edit-toolbar .aui-toolbar2-primary .aui-buttons').show();
    jQuery(this).one('click', toMarkdownHandler);
    return false;
}

function toMarkdownHandler() {
    jQuery(this).text('To JIRA');
    container = jQuery(this).closest('.wiki-edit');
    jQuery(container).find('textarea.wiki-textfield')[0].value = toMarkdown(jQuery(container).find(
      'textarea.wiki-textfield')[0].value);
    jQuery(container).find('.wiki-edit-toolbar .aui-toolbar2-primary .aui-buttons').not('.jira2markdown').hide();
    jQuery(this).one('click', toJiraHandler);
    return false;
}

jQuery(document).on('focus', 'textarea.wiki-textfield', function(){
  container = jQuery(this).closest('.wiki-edit');
  if (container.find('.jira2markdown a').length == 0){
      jQuery('<div class="aui-buttons jira2markdown" style="display:block;"><a href="#" tabindex="-1" class="aui-button aui-button-subtle">To Markdown</a></div>'
        ).prependTo(container.find('.wiki-edit-toolbar .aui-toolbar2-primary')).find('a').one('click', toMarkdownHandler);
  }
});