如何在下面的ES6循环中获得前面的文本

我正在用ES6:编写Markdown解析器

输入：

# Title
* * *
Paragraph
Another paragraph

示例代码：

// create a find/replace based on a regex and replacement 
// to later be used with the conversion functions
function massReplace(text, replacements) {
  let result = text
  for (let [regex, replacement] of replacements) {
    result = result.replace(regex, replacement)
  }
  return result
}
// match text with # and replace them for html headings
function convertHeadings(text, orig) {
  if (orig.match(/^#{1,6}'s/)) {
    return massReplace(text,
       [/^### (.*)/gm,    '<h3>$1</h3>'],
       [/^## (.*)/gm,     '<h2>$1</h2>'],
       [/^# (.*)/gm,      '<h1>$1</h1>'] ]
    )
  }
}
// match text without # and surround them with p tags
function convertParagraphs(text, orig) {
  if (!orig.match(/^#{1,6} (.*)/)) {
    return `<p>${text}</p>`
  }
}
// take the source, split on new lines, make a copy (to 
// have a "clean" version to be used in the if statements),
// and finally apply the conversion functions to them with
// the help of a loop and excluding those that output undefined
function convertToHTML(markdownSource) {
  let data = markdownSource.split(''n'n')
    , orig = data.slice()
    , conversions = [ convertHeadings, convertParagraphs]
  for (let i = 0, l = orig.length; i < l; ++i) {
    for (let conversion of conversions) {
      let result = conversion(data[i], orig[i])
      if (result !== undefined) {
        data[i] = result
      }
    }
  }
  return data.join(''n'n')
}

我现在想要的是用类no-indent将p标记包装在前面有* * *的文本周围（上例中为Paragraph）。问题是，我不知道如何根据前一个（本例中为* * *）获得文本。

为了给出一个想法，这是所需的输出：

<h1>Title</h1>
<p>* * *</p>
<p class="no-indent">Paragraph</p>
<p>Another paragraph</p>