const GithubSlugger = require('github-slugger')
const renderContent = require('./renderContent')
const { ExtendedMarkdown, tags } = require('../liquid-tags/extended-markdown')

// Include custom tags like {% link_with_intro /article/foo %}
renderContent.liquid.registerTag('link', require('../liquid-tags/link')('link'))
renderContent.liquid.registerTag('link_with_intro', require('../liquid-tags/link-with-intro'))
renderContent.liquid.registerTag('homepage_link_with_intro', require('../liquid-tags/homepage-link-with-intro'))
renderContent.liquid.registerTag('link_in_list', require('../liquid-tags/link-in-list'))
renderContent.liquid.registerTag('topic_link_in_list', require('../liquid-tags/topic-link-in-list'))
renderContent.liquid.registerTag('indented_data_reference', require('../liquid-tags/indented-data-reference'))
renderContent.liquid.registerTag('data', require('../liquid-tags/data'))
renderContent.liquid.registerTag('octicon', require('../liquid-tags/octicon'))
renderContent.liquid.registerTag('link_as_article_card', require('../liquid-tags/link-as-article-card'))

for (const tag in tags) {
  // Register all the extended markdown tags, like {% note %} and {% warning %}
  renderContent.liquid.registerTag(tag, ExtendedMarkdown)
}

/**
 * Like the `size` filter, but specifically for
 * getting the number of keys in an object
 */
renderContent.liquid.registerFilter('obj_size', input => {
  if (!input) return 0
  return Object.keys(input).length
})

/**
 * Returns the version number of a GHES version string
 * ex: enterprise-server@2.22 => 2.22
 */
renderContent.liquid.registerFilter('version_num', input => {
  return input.split('@')[1]
})

/**
 * Convert the input to a slug
 */
renderContent.liquid.registerFilter('slugify', input => {
  const slugger = new GithubSlugger()
  return slugger.slug(input)
})

module.exports = renderContent