libraryDependencies += "com.github.tkqubo" % "html-to-markdown" % "0.3.0"

import com.github.tkqubo.html2md.Html2Markdown

val html = "<h1>introduction</h1><p>this is a <b>converter</b>.</p>"
val markdown = Html2Markdown.toMarkdown(html)
// markdown == "# introduction\n\nthis is a **converter**."

// <br>
('br -> "\n")

// <p>
('p -> { content: String => s"\n\n$content\n\n" })

// <em> or <i>
(Seq('em, 'i) -> { content: String => s"_${content}_" })

// <a> with href attr
(
  { e: Element => e.tagName == "a" && e.hasAttr("href") } ->
  { (text: String, e: Element) =>
    val titlePart = if (e.hasAttr("title")) s""" "${e.attr("title")}"""" else ""
    s"""[$text](${e.attr("href")}$titlePart)"""
  }
)