git ssb

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var ref = require('ssb-ref')
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var marked = require('ssb-marked')
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function noop(){}
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var onLink = noop
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var extractor = new marked.Renderer()
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var qs = require('querystring')
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var keyRegex = /[0-9a-zA-Z\/+]{43}=(?:\.boxs)?/
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function isKey(str) {
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  return keyRegex.test(str)
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}
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// prevent html from entering into mention labels.
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// code taken from ssb-markdown
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extractor.code = function(code, lang, escaped) { return escaped ? unquote(code) : code }
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extractor.blockquote = function(quote) { return unquote(quote) }
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extractor.html = function(html) { return false }
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extractor.heading = function(text, level, raw) { return unquote(text)+' ' }
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extractor.hr = function() { return ' --- ' }
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extractor.br = function() { return ' ' }
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extractor.list = function(body, ordered) { return unquote(body) }
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extractor.listitem = function(text) { return '- '+unquote(text) }
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extractor.paragraph = function(text) { return unquote(text)+' ' }
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extractor.table = function(header, body) { return unquote(header + ' ' + body) }
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extractor.tablerow = function(content) { return unquote(content) }
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extractor.tablecell = function(content, flags) { return unquote(content) }
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extractor.strong = function(text) { return unquote(text) }
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extractor.em = function(text) { return unquote(text) }
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extractor.codespan = function(text) { return unquote(text) }
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extractor.del = function(text) { return unquote(text) }
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function unquote (text) {
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  return text.replace(/&/g, '&').replace(/"/g, '"').replace(/'/g, '\'')
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}
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extractor.mention = function (_, id) {
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  onLink({target: id})
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}
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extractor.emoji = function (name) {
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  onLink({label: name, emoji: true})
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  return ':' + name + ':'
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}
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extractor.hashtag = function (_, hashtag) {
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  onLink({target: hashtag})
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}
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extractor.link = function (href, _, text) {
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  onLink({label: text, target: href, embed: false})
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}
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extractor.image = function (href, _, text) {
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  onLink({label: text, target: href, embed: true})
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}
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function links (s, _onLink) {
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  if('string' !== typeof s) return
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  onLink = _onLink
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  try {
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    marked(s, {renderer: extractor, emoji: extractor.emoji})
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  } catch(err) {
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    console.log(JSON.stringify(s))
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    throw err
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  }
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  onLink = noop
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}
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module.exports = function (text, opts) {
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  var bareFeedNames = opts && opts.bareFeedNames
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  var emoji = opts && opts.emoji
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  var a = []
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  links(text, function (link) {
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    if(ref.isFeed(link.target))
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      a.push({link: link.target, name: link.label && link.label.replace(/^@/, '')})
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    else if(link.target && link.target[0] === '&') {
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      var parts = link.target.split('?')
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      var hash = parts[0]
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      var key
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      if(parts[1]) {
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        var q
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        try { q = qs.parse(parts[1]) }
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        catch(e) { q = {} }
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        if(typeof q.unbox === 'string') key = q.unbox.replace(/\s/g, '+')
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      } else {
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        parts = hash.split('#')
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        hash = parts[0]
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        key = parts[1]
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      }
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      if(ref.isBlob(hash)) {
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        link = {link: hash, name: link.label}
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        if(isKey(key)) link.key = key.replace(/\.boxs$/, '')
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        a.push(link)
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      }
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    }
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    else if(ref.isMsg(link.target))
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      a.push({link: link.target, name: link.label})
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    else if(bareFeedNames && link.target && link.target[0] === '@')
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      a.push({link: link.target[0], name: link.target.substr(1)})
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    else if(link.target && link.target[0] === '#')
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      a.push({link: link.target})
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    else if(emoji && link.emoji)
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      a.push({emoji: true, name: link.label})
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  })
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  return a
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}
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