/**
  Support for github style code blocks, here you begin with three backticks and supply a language,
  The language is made into a class on the resulting `<code>` element.

  @event register
  @namespace Discourse.Dialect
**/
Discourse.Dialect.replaceBlock({
  start: /^`{3}([^\n\[\]]+)?\n?([\s\S]*)?/gm,
  stop: '```',
  emitter: function(blockContents, matches) {
    return ['p', ['pre', ['code', {'class': matches[1] || 'lang-auto'}, blockContents.join("\n") ]]];
  }
});

// Ensure that content in a code block is fully escaped. This way it's not white listed
// and we can use HTML and Javascript examples.
Discourse.Dialect.postProcessTag('code', function (contents) {
  return Handlebars.Utils.escapeExpression(contents.replace(/^ +| +$/g,''));
});