From 218cab051bfee550fe76d69e6658f1d2a1569346 Mon Sep 17 00:00:00 2001
From: Shibasis <smartshibasish@gmail.com>
Date: Wed, 26 Oct 2016 08:23:54 +0530
Subject: [PATCH] solved #274 review youtube embed handling

---
 lib/plugin/youtube.js | 101 ------------------------------------------
 lib/render.js         |   2 -
 2 files changed, 103 deletions(-)
 delete mode 100644 lib/plugin/youtube.js

diff --git a/lib/plugin/youtube.js b/lib/plugin/youtube.js
deleted file mode 100644
index 5bb2869..0000000
--- a/lib/plugin/youtube.js
+++ /dev/null
@@ -1,101 +0,0 @@
-// markdown-it plugin to wrap youtube iframes in a <div> for styling purposes
-//
-var URL = require('url')
-
-var WRAPPER_START = "<div class='youtube-video'>"
-var WRAPPER_END = '</div>'
-
-// determine whether the given HTML string contains an iframe pointing to a youtube.com URL
-function isYoutubeIframe (content) {
-  // look for the src attribute's value
-  var attr = content.match(/<\s*iframe[^>]*\bsrc\s*=\s*/)
-  if (attr) {
-    // mark the location and figure out what kind of quotation mark is delimiting the value
-    var position = attr.index + attr[0].length
-    var quote = content.charAt(position)
-    var substring = content.slice(position + 1)
-
-    // now that we've found the first delimiting quotation mark, match
-    // everything up to the next instance of the same quotation mark
-    var src = substring.match(new RegExp('^[^' + quote + ']*'))
-    if (src) {
-      var value = src[0]
-      // for protocol-relative src, prepend a protocol for URL parsing purposes
-      if (value.indexOf('//') === 0) {
-        value = 'https:' + value
-      }
-
-      var url = URL.parse(value)
-      return (url.host && url.host.match(/^(\w+\.)?youtube\.com$/))
-    }
-  }
-  return false
-}
-
-module.exports = function (md, opts) {
-  // Wrap iframes that appear in HTML blocks
-  //
-  // In html_block tokens, the entire contents of an HTML block appear as the
-  // `.content` property of a single token object. For a standalone `<iframe>`,
-  // wrapping it with our `<div>` is pretty straightforward, but when it
-  // appears deeper inside the snippet, we have to do a little more parsing
-  // work to figure out where to insert our wrapping elements.
-  //
-  var originalBlockRule = md.renderer.rules.html_block
-  md.renderer.rules.html_block = function (tokens, idx, options, env, self) {
-    var content = tokens[idx].content
-
-    if (isYoutubeIframe(content)) {
-      // start by assuming the entire block is solely made up of the iframe
-      var start = 0
-      var end = content.length
-
-      // check to see where the iframe actually starts
-      var isDeep = content.match(/>\s*<\s*iframe/)
-      if (isDeep) {
-        start = content.substring(isDeep.index).indexOf('<') + isDeep.index
-      }
-
-      // find the closing `</iframe>` tag, so we can find the end of it
-      var closingMatch = content.substring(start).match(/>[^>]*<\s*\/\s*iframe\s*>/)
-      if (closingMatch) {
-        var endOffset = content.substring(start + closingMatch.index + 1).indexOf('>') + 1
-        end = start + closingMatch.index + endOffset + 1
-      }
-
-      // slice up the content according to the positions we've computed
-      var prefix = content.substring(0, start)
-      var iframe = content.substring(start, end)
-      var postfix = content.substring(end)
-
-      // inject the wrapper element
-      tokens[idx].content = prefix + WRAPPER_START + iframe + WRAPPER_END + postfix
-    }
-
-    return originalBlockRule.call(this, tokens, idx, options, env, self)
-  }
-
-  // Wrap iframes that appear inside inline HTML strings
-  //
-  // In runs of html_inline tokens, the opening `<iframe>` tag will appear in a
-  // separate token from the closing `</iframe>` tag, so what we have to do if we
-  // find a match is walk through the list to find out where to put the closing
-  // `</div>` part of our wrapper
-  //
-  var originalInlineRule = md.renderer.rules.html_inline
-  md.renderer.rules.html_inline = function (tokens, idx, options, env, self) {
-    if (isYoutubeIframe(tokens[idx].content)) {
-      // prepend the opening part of the wrapper
-      tokens[idx].content = WRAPPER_START + tokens[idx].content
-
-      // find the closing tag and append the closing part of the wrapper
-      for (var position = idx; position < tokens.length && tokens[position].type === 'html_inline'; position++) {
-        if (tokens[position].content === '</iframe>') {
-          tokens[position].content += WRAPPER_END
-        }
-      }
-    }
-
-    return originalInlineRule.call(this, tokens, idx, options, env, self)
-  }
-}
diff --git a/lib/render.js b/lib/render.js
index ef09457..980e675 100644
--- a/lib/render.js
+++ b/lib/render.js
@@ -12,7 +12,6 @@ var codeWrap = require('./plugin/code-wrap')
 var headingLinks = require('./plugin/heading-links')
 var gravatar = require('./plugin/gravatar')
 var github = require('./plugin/github')
-var youtube = require('./plugin/youtube')
 var cdnImages = require('./plugin/cdn')
 var badges = require('./plugin/badges')
 var packagize = require('./plugin/packagize')
@@ -72,7 +71,6 @@ var render = module.exports = function (html, options) {
     .use(relaxedLinkRefs)
     .use(gravatar)
     .use(github, {package: options.package})
-    .use(youtube)
     .use(badges)
     .use(packagize, {package: options.package})