git ssb

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var fs = require('fs')
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var path = require('path')
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var pull = require('pull-stream')
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var cat = require('pull-cat')
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var paramap = require('pull-paramap')
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var h = require('hyperscript')
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var ph = require('pull-hyperscript')
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var marked = require('ssb-marked')
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var emojis = require('emoji-named-characters')
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var qs = require('querystring')
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var u = require('./util')
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var multicb = require('multicb')
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var RenderMsg = require('./render-msg')
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var Highlight = require('highlight.js')
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var md = require('ssb-markdown')
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module.exports = Render
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function MdRenderer(render) {
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  marked.Renderer.call(this, {})
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  this.render = render
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}
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MdRenderer.prototype = new marked.Renderer()
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MdRenderer.prototype.urltransform = function (href) {
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  return this.render.toUrl(href)
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}
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MdRenderer.prototype.image = function (ref, title, text) {
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  if (ref[0] !== '&') return this.link(ref, title, text)
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  var alt = this.render.getImageAlt(ref, text)
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  return (/^video:/.test(text) ? h('video', {
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    controls: 'controls',
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    src: this.render.toUrl(ref),
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    title: u.unescapeHTML(title) || undefined
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  }, '\n' + alt) : /^audio:/.test(text) ? h('audio', {
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    controls: 'controls',
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    src: this.render.toUrl(ref),
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    title: u.unescapeHTML(title) || undefined
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  }, '\n' + alt) : h('img', {
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    src: this.render.imageUrl(ref),
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    alt: alt,
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    title: u.unescapeHTML(title) || undefined
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  })).outerHTML
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}
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MdRenderer.prototype.link = function (ref, title, text) {
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  var href = this.urltransform(ref)
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  var name = href && /^\/(&|%26)/.test(href) && (title || text)
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  if (u.isRef(ref)) {
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    var myName = this.render.app.getNameSync(ref)
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    if (myName) title = title ? title + ' (' + myName + ')' : myName
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  }
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  var hrefToken = href !== false ? u.token() : undefined
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  var a = h('a', {
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    class: href === false ? 'bad' : undefined,
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    href: href !== false ? hrefToken : undefined,
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    title: title || undefined,
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    download: name ? encodeURIComponent(name) : undefined
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  })
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  // text is already html-escaped
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  a.innerHTML = text
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  var html = a.outerHTML
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  // href is already html-escaped
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  if (hrefToken) html = html.replace(hrefToken, href)
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  var link = this.render._mentionsByLink[ref]
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  if (link && link.type === 'text/x-markdown') {
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    html += h('sup', ' [', h('a', {
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      href: this.render.toUrl('/markdown/' + ref),
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      title: 'view rendered markdown'
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    }, 'md'), ']').outerHTML
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  }
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  return html
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}
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MdRenderer.prototype.mention = function (preceding, id) {
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  var href = this.urltransform(id)
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  var myName = this.render.app.getNameSync(id)
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  var html = (preceding||'') + h('a', {
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    class: href === false ? 'bad' : undefined,
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    href: href !== false ? href : undefined,
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    title: myName || undefined,
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  }, id.length > 50 ? id.slice(0, 8) + '…' : id).outerHTML
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  var link = this.render._mentionsByLink[id]
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  if (link && link.type === 'text/x-markdown') {
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    html += h('sup', ' [', h('a', {
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      href: this.render.toUrl('/markdown/' + id),
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      title: 'view rendered markdown'
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    }, 'md'), ']').outerHTML
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  }
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  return html
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}
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MdRenderer.prototype.code = function (code, lang, escaped) {
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  if (this.render.opts.codeInTextareas) {
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    return h('div', h('textarea', {
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      cols: 80,
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      rows: u.rows(code),
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      style: 'font-family: monospace',
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      innerHTML: escaped ? code : u.escapeHTML(code)
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    })).outerHTML
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  } else {
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    return marked.Renderer.prototype.code.call(this, code, lang, escaped)
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  }
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}
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function lexerRenderEmoji(emoji) {
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  var el = this.renderer.render.emoji(emoji)
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  return el && el.outerHTML || el
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}
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function Render(app, opts) {
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  this.app = app
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  this.opts = opts
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  this.markedOpts = {
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    gfm: true,
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    mentions: true,
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    tables: true,
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    breaks: true,
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    pedantic: false,
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    sanitize: true,
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    smartLists: true,
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    smartypants: false,
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    emoji: lexerRenderEmoji,
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    renderer: new MdRenderer(this),
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    highlight: this.highlight.bind(this),
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  }
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}
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Render.prototype.emoji = function (emoji) {
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  var name = ':' + emoji + ':'
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  var link = this._mentions && this._mentions[name]
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  if (link && link.link) {
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    this.app.reverseEmojiNameCache.set(emoji, link.link)
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    return h('img.ssb-emoji', {
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      src: this.opts.img_base + link.link,
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      alt: name
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        + (link.size != null ? ' (' + this.formatSize(link.size) + ')' : ''),
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      height: 17,
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      title: name,
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    })
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  }
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  if (emoji in emojis) {
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    return h('img.ssb-emoji', {
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      src: this.opts.emoji_base + emoji + '.png',
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      alt: name,
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      height: 17,
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      align: 'absmiddle',
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      title: name,
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    })
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  }
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  return name
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}
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/* disabled until it can be done safely without breaking html
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function fixSymbols(str) {
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  // Dillo doesn't do fallback fonts, so specifically render fancy characters
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  // with Symbola
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  return str.replace(/[^\u0000-\u00ff]+/, function ($0) {
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    return '<span class="symbol">' + $0 + '</span>'
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  })
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}
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*/
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Render.prototype.markdown = function (text, mentions, opts) {
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  if (!text) return ''
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  var ssbcMd = opts && opts.ssbcMd
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  var mentionsObj = this._mentions = {}
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  var mentionsByLink = this._mentionsByLink = {}
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  if (Array.isArray(mentions)) mentions.forEach(function (link) {
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    if (!link) return
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    else if (link.emoji)
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      mentionsObj[':' + link.name + ':'] = link
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    else if (link.name && link.link && link.link[0] === '@')
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      mentionsObj['@' + link.name] = link.link
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    else if (link.host === 'http://localhost:7777')
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      mentionsObj[link.href] = link.link
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    if (link.link)
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      mentionsByLink[link.link +
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        (link.query && typeof link.query.unbox === 'string' ?
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          '?unbox=' + link.query.unbox.replace(/\s/g, '+') : '') +
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        (link.key ? '#' + link.key : '')] = link
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  })
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  var self = this
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  var out = ssbcMd ? md.block(String(text), {
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    toUrl: function (ref) { return self.toUrl(ref) },
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    imageLink: function (ref) { return self.imageUrl(ref) }
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  }) : marked(u.toString(text), this.markedOpts)
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  delete this._mentions
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  delete this._mentionsByLink
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  return out //fixSymbols(out)
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}
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Render.prototype.imageUrl = function (ref) {
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  var m = /^blobstore:(.*)/.exec(ref)
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  if (m) ref = m[1]
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  ref = ref.replace(/#/, '%23')
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  return this.opts.img_base + ref
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}
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Render.prototype.getImageAlt = function (id, fallback) {
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  var link = this._mentionsByLink[id]
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  if (!link) return fallback
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  var name = String(u.unescapeHTML(link.name || fallback))
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    .replace(/^(video|audio):/, '')
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  return name
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    + (link.type && !/\.\S+$/.test(name) ? ' [' + link.type + ']' : '')
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    + (link.size != null ? ' (' + this.formatSize(link.size) + ')' : '')
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}
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Render.prototype.formatSize = function (size) {
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  if (size < 1024) return size + ' B'
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  size /= 1024
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  if (size < 1024) return size.toFixed(2) + ' KB'
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  size /= 1024
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  return size.toFixed(2) + ' MB'
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}
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Render.prototype.linkify = function (text, opts) {
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  var ellipsis = opts && opts.ellipsis
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  var arr = text.split(u.ssbRefEncRegex)
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  for (var i = 1; i < arr.length; i += 2) {
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    var id = arr[i]
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    var text = ellipsis && id.length > 8 ? id.substr(0, 8) + '…' : id
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    arr[i] = h('a', {href: this.toUrlEnc(id)}, text)
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  }
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  return arr
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}
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Render.prototype.toUrlEnc = function (href) {
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  var url = this.toUrl(href)
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  if (url) return url
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  try { href = decodeURIComponent(href) }
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  catch (e) { return false }
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  return this.toUrl(href)
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}
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Render.prototype.toUrl = function (href) {
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  if (!href) return href
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  var mentions = this._mentions
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  if (mentions && href in this._mentions) href = this._mentions[href]
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  if (/^ssb:\/\//.test(href)) href = href.substr(6)
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  if (/^ssb-blob:\/\//.test(href)) {
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    return this.opts.base + 'zip/' + href.substr(11)
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  }
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  switch (href[0]) {
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    case '%':
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      var parts = href.split('?')
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      var hash = parts.shift()
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      var query = parts.join('?')
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      if (!u.isRef(hash)) return false
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      return this.opts.base +
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        (this.opts.encode_msgids ? encodeURIComponent(hash) : hash)
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        + (query ? '?' + query : '')
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    case '@':
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      if (!u.isRef(href.replace(/\?.*/, ''))) return false
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      return this.opts.base + href
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    case '&':
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      var parts = href.split('#')
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      var hash = parts.shift()
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      var key = parts.shift()
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      var fragment = parts.join('#')
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      parts = hash.split('?')
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      hash = parts.shift()
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      query = parts.join('?')
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      if (!u.isRef(hash)) return false
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      return this.opts.blob_base + hash
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        + (query ? '?' + query : '')
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        + (key ? encodeURIComponent('#' + key) : '')
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        + (fragment ? '#' + fragment : '')
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    case '#': return this.opts.base + 'channel/' +
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      encodeURIComponent(href.substr(1).toLowerCase())
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    case '/': return this.opts.base + href.substr(1)
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    case '?': return this.opts.base + 'search?q=' + encodeURIComponent(href)
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  }
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  var m = /^blobstore:(.*)/.exec(href)
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  if (m) return this.opts.blob_base + m[1]
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  if (/^javascript:/.test(href)) return false
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  if (!/^[a-z0-9]*:/.test(href)) return 'http://' + href
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  return href
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}
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Render.prototype.lockIcon = function () {
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  return this.emoji('lock')
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}
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Render.prototype.avatarImage = function (link, cb) {
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  var self = this
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  if (!link) return cb(), ''
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  if (typeof link === 'string') link = {link: link}
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  var img = h('img.ssb-avatar-image', {
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    width: 72,
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    alt: ' '
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  })
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  if (link.image) gotAbout(null, link)
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  else self.app.getAbout(link.link, gotAbout)
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  function gotAbout(err, about) {
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    if (err) console.trace(err)
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    img.src = about && about.image ? self.imageUrl(about.image)
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      : self.toUrl('/static/fallback.png')
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    cb()
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  }
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  return img
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}
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Render.prototype.prepareLink = function (link, cb) {
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  if (typeof link === 'string') link = {link: link}
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  if (link.name || !link.link) cb(null, link)
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  else this.app.getAbout(link.link, function (err, about) {
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    if (err) return cb(null, link)
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    link.name = about.name || about.title || (link.link.substr(0, 8) + '…')
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    if (link.name && link.name[0] === link.link[0]) {
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      link.name = link.name.substr(1)
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    }
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    cb(null, link)
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  })
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}
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Render.prototype.prepareLinks = function (links, cb) {
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  var self = this
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  if (!links) return cb()
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  var done = multicb({pluck: 1})
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  if (Array.isArray(links)) links.forEach(function (link) {
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    self.prepareLink(link, done())
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  })
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  done(cb)
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}
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Render.prototype.idLink = function (link, cb) {
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  var self = this
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  if (!link) return cb(), ''
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  var a = h('a', ' ')
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  self.prepareLink(link, function (err, link) {
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    if (err) return cb(err)
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    a.href = self.toUrl(link.link)
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    var sigil = link.link && link.link[0] || '@'
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    var name = link.name || String(link.link).substr(1, 8) + '…'
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    a.childNodes[0].textContent = sigil + name
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    cb()
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  })
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  return a
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}
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// %NM8tXGBBDKKcpRbbyd/5uN1p/2OtBMFDylLMDPGoq8Q=.sha256
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var idRegex = /^[A-Za-z0-9._\-+=/]*[A-Za-z0-9_\-+=/]$/
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Render.prototype.idLinkCopyable = function (link, cb) {
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  var self = this
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  if (!self.app.copyableIds) return idLink(link, cb)
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  if (!link) return cb(), ''
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  var a = h('a', ' ')
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  self.prepareLink(link, function (err, link) {
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    if (err) return cb(err)
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    a.href = self.toUrl(link.link)
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    var name = link.name || String(link.link).substr(1, 8) + '…'
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    if (idRegex.test(name)) a.childNodes[0].textContent = '@' + name
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    else {
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      a.className = 'id-copyable-link'
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      a.innerHTML = h('span', [
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        h('span.id-deemphasize', '['),
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        h('span.id-name', '@' + link.name),
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        h('span.id-deemphasize', '](', link.link, ')'),
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      ]).innerHTML
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    }
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    cb()
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  })
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  return a
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}
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Render.prototype.privateLine = function (opts, cb) {
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  var recps = opts.recps
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  var isAuthorRecp = opts.isAuthorRecp
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  var done = multicb({pluck: 1, spread: true})
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  var self = this
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  var el = h('div.recps',
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    opts.noLockIcon ? '' : self.lockIcon(),
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    !isAuthorRecp ? [
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      h('span', {title: 'Author is not a recipient'}, '[!]'), ' '
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    ] : '',
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    Array.isArray(recps)
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      ? recps.map(function (recp) {
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        return [' ', self.idLink(recp, done())]
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      }) : '')
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  done(cb)
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  return el
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}
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Render.prototype.msgIdLink = function (id, cb) {
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  var self = this
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  var el = h('span')
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  var a = h('a', {href: self.toUrl(id)}, id)
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  self.app.getMsgDecrypted(id, function (err, msg) {
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    if (err) return el.appendChild(u.renderError(err)), cb()
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    var renderMsg = new RenderMsg(self, self.app, msg, {wrap: false, serve: self.serve})
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    renderMsg.title(function (err, title) {
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      if (err) return el.appendChild(u.renderError(err)), cb()
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      a.childNodes[0].textContent = title
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      cb()
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    })
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  })
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  return a
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}
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Render.prototype.phMsgLink = function (msg) {
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  var self = this
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  return u.readNext(function (cb) {
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    self.app.unboxMsg(msg, function (err, msg) {
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      if (err) return cb(err)
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      var renderMsg = new RenderMsg(self, self.app, msg, {wrap: false, serve: self.serve})
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      renderMsg.title(function (err, title) {
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        if (err) return cb(err)
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        cb(null, ph('a', {href: self.toUrl(msg.key)}, u.escapeHTML(title)))
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      })
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    })
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  })
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}
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Render.prototype.renderMsg = function (msg, opts, cb) {
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  var self = this
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  self.app.filterMsg(msg, opts, function (err, show) {
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    if (err) return cb(err)
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    if (show) new RenderMsg(self, self.app, msg, opts).message(cb)
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    else cb(null, '')
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  })
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}
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Render.prototype.renderFeeds = function (opts) {
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  var self = this
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  var limit = Number(opts.limit)
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  return pull(
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    paramap(function (msg, cb) {
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      self.renderMsg(msg, opts, cb)
438
    }, 4),
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    pull.filter(Boolean),
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    limit && pull.take(limit)
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  )
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}
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Render.prototype.gitCommitBody = function (body) {
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  if (!body) return ''
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  var isMarkdown = !/^# Conflicts:$/m.test(body)
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  return isMarkdown
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    ? h('div', {innerHTML: this.markdown('\n' + body)})
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    : h('pre', this.linkify('\n' + body))
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}
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Render.prototype.getName = function (id, cb) {
453
  // TODO: consolidate the get name/link functions
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  var self = this
455
  switch (id && id[0]) {
456
    case '%':
457
      return self.app.getMsgDecrypted(id, function (err, msg) {
458
        if (err && err.name == 'NotFoundError')
459
          return cb(null, String(id).substring(0, 8) + '…(missing)')
460
        if (err) return fallback()
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        new RenderMsg(self, self.app, msg, {wrap: false}).title(cb)
462
      })
463
    case '@': // fallthrough
464
    case '&':
465
      return self.app.getAbout(id, function (err, about) {
466
        if (err || !about || !about.name) return fallback()
467
        cb(null, about.name)
468
      })
469
    default:
470
      return cb(null, String(id))
471
  }
472
  function fallback() {
473
    cb(null, String(id).substr(0, 8) + '…')
474
  }
475
}
476
477
Render.prototype.getNameLink = function (id, opts, cb) {
478
  if (!cb && typeof opts === 'function') cb = opts, opts = null
479
  var length = opts && opts.length || Infinity
480
  var self = this
481
  self.getName(id, function (err, name) {
482
    if (err) return cb(err)
483
    cb(null, h('a', {href: self.toUrl(id)}, u.truncate(name, length)))
484
  })
485
}
486
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Render.prototype.npmAuthorLink = function (author) {
488
  if (!author) return
489
  var url = u.ifString(author.url)
490
  var email = u.ifString(author.email)
491
  var name = u.ifString(author.name)
492
  var title
493
  if (!url && u.isRef(name)) url = name, name = null
494
  if (!url && !email) return name || JSON.stringify(author)
495
  if (!url && email) url = 'mailto:' + email, email = null
496
  if (!name && email) name = email, email = null
497
  var feed = u.isRef(url) && url[0] === '@' && url
498
  if (feed && name) title = this.app.getNameSync(feed)
499
  if (feed && name && name[0] != '@') name = '@' + name
500
  if (feed && !name) name = this.app.getNameSync(feed) // TODO: async
501
  if (url && !name) name = url
502
  var secondaryLink = email && h('a', {href: this.toUrl('mailto:' + email)}, email)
503
  return [
504
    h('a', {href: this.toUrl(url), title: title}, name),
505
    secondaryLink ? [' (', secondaryLink, ')'] : ''
506
  ]
507
}
508
509
// auto-highlight is slow
510
var useAutoHighlight = false
511
512
Render.prototype.highlight = function (code, lang) {
513
  if (code.length > 100000) return u.escapeHTML(code)
514
  if (!lang && /^#!\/bin\/[^\/]*sh$/m.test(code)) lang = 'sh'
515
  try {
516
    return lang
517
      ? Highlight.highlight(lang, code).value
518
      : useAutoHighlight
519
      ? Highlight.highlightAuto(code).value
520
      : u.escapeHTML(code)
521
  } catch(e) {
522
    if (!/^Unknown language/.test(e.message)) console.trace(e)
523
    return u.escapeHTML(code)
524
  }
525
}
526
527
Render.prototype.npmPackageMentions = function (links, cb) {
528
  var self = this
529
  var pkgLinks = u.toArray(links).filter(function (link) {
530
    return /^npm:/.test(link.name)
531
  })
532
  if (pkgLinks.length === 0) return cb(null, '')
533
  var done = multicb({pluck: 1})
534
  pkgLinks.forEach(function (link) {
535
    self.npmPackageMention(link, {}, done())
536
  })
537
  done(function (err, mentionEls) {
538
    cb(null, h('table',
539
      h('thead', h('tr',
540
        h('th', 'package'),
541
        h('th', 'version'),
542
        h('th', 'tag'),
543
        h('th', 'size'),
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        h('th', 'tarball'),
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        h('th', 'readme')
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      )),
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      h('tbody', mentionEls)
548
    ))
549
  })
550
}
551
552
Render.prototype.npmPrebuildMentions = function (links, cb) {
553
  var self = this
554
  var prebuildLinks = u.toArray(links).filter(function (link) {
555
    return /^prebuild:/.test(link.name)
556
  })
557
  if (prebuildLinks.length === 0) return cb(null, '')
558
  var done = multicb({pluck: 1})
559
  prebuildLinks.forEach(function (link) {
560
    self.npmPrebuildMention(link, {}, done())
561
  })
562
  done(function (err, mentionEls) {
563
    cb(null, h('table',
564
      h('thead', h('tr',
565
        h('th', 'name'),
566
        h('th', 'version'),
567
        h('th', 'runtime'),
568
        h('th', 'abi'),
569
        h('th', 'platform+libc'),
570
        h('th', 'arch'),
571
        h('th', 'size'),
572
        h('th', 'tarball')
573
      )),
574
      h('tbody', mentionEls)
575
    ))
576
  })
577
}
578
579
Render.prototype.npmPackageMention = function (link, opts, cb) {
580
  var nameRegex = /'prebuild:{name}-v{version}-{runtime}-v{abi}-{platform}{libc}-{arch}.tar.gz'/
581
  var parts = String(link.name).replace(/\.tgz$/, '').split(':')
582
  var name = parts[1]
583
  var version = parts[2]
584
  var distTag = parts[3]
585
  var self = this
586
  var done = multicb({pluck: 1, spread: true})
587
  var base = '/npm/' + (opts.author ? u.escapeId(link.author) + '/' : '')
588
  var pathWithAuthor = opts.withAuthor ? '/npm/' +
589
    u.escapeId(link.author) +
590
      (opts.name ? '/' + opts.name +
591
        (opts.version ? '/' + opts.version +
592
          (opts.distTag ? '/' + opts.distTag + '/' : '') : '') : '') : ''
593
  self.app.getAbout(link.author, done())
594
  self.app.getBlobState(link.link, done())
595
  done(function (err, about, blobState) {
596
    if (err) return cb(err)
597
    cb(null, h('tr', [
598
      opts.withAuthor ? h('td', h('a', {
599
        href: self.toUrl(pathWithAuthor),
600
        title: 'publisher'
601
      }, about.name || u.truncate(link.author, 8)), ' ') : '',
602
      h('td', h('a', {
603
        href: self.toUrl(base + name),
604
        title: 'package name'
605
      }, name), ' '),
606
      h('td', version ? [h('a', {
607
        href: self.toUrl(base + name + '/' + version),
608
        title: 'package version'
609
      }, version), ' '] : ''),
610
      h('td', distTag ? [h('a', {
611
        href: self.toUrl(base + name + '//' + distTag),
612
        title: 'dist-tag'
613
      }, distTag), ' '] : ''),
614
      h('td', {align: 'right'}, link.size != null ? [h('span', {
615
        title: 'tarball size'
616
      }, self.formatSize(link.size)), ' '] : ''),
617
      h('td', typeof link.link === 'string' ? h('code', h('a', {
618
        href: self.toUrl('/links/' + link.link),
619
        title: 'package tarball'
620
      }, link.link.substr(0, 8) + '…')) : ''),
621
      h('td',
622
        blobState === 'wanted' ?
623
        'fetching...'
624
        : blobState ? h('a', {
625
          href: self.toUrl('/npm-readme/' + encodeURIComponent(link.link)),
626
          title: 'package contents'
627
        }, 'readme')
628
        : self.blobFetchForm(link.link))
629
    ]))
630
  })
631
}
632
633
Render.prototype.blobFetchForm = function (id) {
634
  return h('form', {action: '', method: 'post'},
635
    h('input', {type: 'hidden', name: 'action', value: 'want-blobs'}),
636
    h('input', {type: 'hidden', name: 'async_want', value: '1'}),
637
    h('input', {type: 'hidden', name: 'blob_ids', value: id}),
638
    h('input', {type: 'submit', value: 'fetch'})
639
  )
640
}
641
642
Render.prototype.npmPrebuildNameRegex = /^prebuild:(.*?)-v([0-9]+\.[0-9]+.*?)-(.*?)-v(.*?)-(.*?)-(.*?)\.tar\.gz$/
643
644
Render.prototype.npmPrebuildMention = function (link, opts, cb) {
645
  var m = this.npmPrebuildNameRegex.exec(link.name)
646
  if (!m) return cb(null, '')
647
  var name = m[1], version = m[2], runtime = m[3],
648
      abi = m[4], platformlibc = m[5], arch = m[6]
649
  var self = this
650
  var done = multicb({pluck: 1, spread: true})
651
  var base = '/npm-prebuilds/' + (opts.author ? u.escapeId(link.author) + '/' : '')
652
  self.app.getAbout(link.author, done())
653
  self.app.getBlobState(link.link, done())
654
  done(function (err, about, blobState) {
655
    if (err) return cb(err)
656
    cb(null, h('tr', [
657
      opts.withAuthor ? h('td', h('a', {
658
        href: self.toUrl(link.author)
659
      }, about.name || u.truncate(link.author, 8)), ' ') : '',
660
      h('td', h('a', {
661
        href: self.toUrl(base + name)
662
      }, name), ' '),
663
      h('td', h('a', {
664
        href: self.toUrl('/npm/' + name + '/' + version)
665
      }, version), ' '),
666
      h('td', runtime, ' '),
667
      h('td', abi, ' '),
668
      h('td', platformlibc, ' '),
669
      h('td', arch, ' '),
670
      h('td', {align: 'right'}, link.size != null ? [
671
        self.formatSize(link.size), ' '
672
      ] : ''),
673
      h('td', typeof link.link === 'string' ? h('code', h('a', {
674
        href: self.toUrl('/links/' + link.link)
675
      }, link.link.substr(0, 8) + '…')) : ''),
676
      h('td',
677
        blobState === 'wanted' ?
678
        'fetching...'
679
        : blobState ? ''
680
        : self.blobFetchForm(link.link))
681
    ]))
682
  })
683
}
684
685
Render.prototype.friendsList = function (prefix) {
686
  prefix = prefix || '/'
687
  var self = this
688
  return pull(
689
    paramap(function (item, cb) {
690
      if (typeof item === 'string') item = {feed: item}
691
      var id = item.feed
692
      self.app.getAbout(item.feed, function (err, about) {
693
        var name = about && about.name || id.substr(0, 8) + '…'
694
        cb(null, [
695
          h('a', {href: self.toUrl(prefix + id)}, name),
696
          item.msg ? h('a', {href: self.toUrl(item.msg.key)}, '₁') : '',
697
          item.msg2 ? h('a', {href: self.toUrl(item.msg2.key)}, '₂') : ''
698
        ])
699
      })
700
    }, 8),
701
    function (read) {
702
      var count = 0
703
      var ended
704
      return function (abort, cb) {
705
        if (ended) return cb(ended)
706
        read(abort, function (end, el) {
707
          if (end === true) {
708
            ended = true
709
            cb(null, '(' + count + ')')
710
          } else {
711
            count++
712
            cb(end, u.toHTML(el) + ' ')
713
          }
714
        })
715
      }
716
    }
717
  )
718
}
719