git ssb

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const nest = require('depnest')
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const { h } = require('mutant')
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const {threadReduce} = require('ssb-reduce-stream')
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const pull = require('pull-stream')
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const isObject = require('lodash/isObject')
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const isString = require('lodash/isString')
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const last = require('lodash/last')
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const get = require('lodash/get')
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exports.gives = nest('app.page.home')
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exports.needs = nest({
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  'about.html.image': 'first',
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  'app.html.nav': 'first',
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  'feed.pull.public': 'first',
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  'history.sync.push': 'first',
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  'message.sync.unbox': 'first',
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})
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function firstLine (text) {
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  if(text.length < 80 && !~text.indexOf('\n')) return text
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  return text.split('\n')[0].substring(0, 80)
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}
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exports.create = (api) => {
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  return nest('app.page.home', home)
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  function home (location) {
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    // location here can expected to be: { page: 'home' }
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    var container = h('div.container', [])
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    function subject (msg) {
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      const { subject, text } = msg.value.content
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      return firstLine(subject|| text)
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    }
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    function link(location) {
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      return {'ev-click': () => api.history.sync.push(location)}
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    }
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    function item (name, thread) {
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      if(!thread.value) return
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      const lastReply = thread.replies && last(thread.replies)
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      return h('div.threadLink', link(thread), [
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        name,
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        h('div.subject', [subject(thread)]),
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        lastReply ? h('div.reply', [subject(lastReply)]) : null
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      ])
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    }
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    function threadGroup (threads, obj, toName) {
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      // threads = a state object for all the types of threads
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      // obj = a map of keys to root ids, where key ∈ (channel | group | concatenated list of pubkeys)
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      // toName = fn that derives a name from a particular thread
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      var groupEl = h('div.group')
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      for(var k in obj) {
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        var id = obj[k]
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        var thread = get(threads, ['roots', id])
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        if(thread && thread.value) {
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          var el = item(toName(k, thread), thread)
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          if(el) groupEl.appendChild(el)
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        }
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      }
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      return groupEl
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    }
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    pull(
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      api.feed.pull.public({reverse: true, limit: 1000}),
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      pull.collect(function (err, messages) {
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        var threads = messages
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          .map(function (data) {
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            if(isObject(data.value.content)) return data
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            return api.message.sync.unbox(data)
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          })
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          .filter(Boolean)
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          .reduce(threadReduce, null)
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        container.appendChild(threadGroup(
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          threads,
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          threads.private,
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          function (_, msg) {    
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            // NB: msg passed in is actually a 'thread', but only care about root msg
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            return h('div.recps', [
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              msg.value.content.recps.map(function (link) {
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                return api.about.html.image(isString(link) ? link : link.link)
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              })
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            ])
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          }
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        ))
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        container.appendChild(threadGroup(
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          threads,
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          threads.channels,
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          ch => h('h2.title', '#'+ch)
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        ))
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      })
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    )
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    return h('Page -home', [
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      h('h1', 'Home'),
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      api.app.html.nav(),
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      container
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    ])
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  }
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}
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