git ssb

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const nest = require('depnest')
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const { h, Array: MutantArray, Value, map, computed, when, resolve, throttle } = require('mutant')
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const get = require('lodash/get')
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exports.gives = nest('app.html.comments')
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exports.needs = nest({
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  'about.html.avatar': 'first',
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  'about.obs.name': 'first',
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  'backlinks.obs.for': 'first',
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  'feed.obs.thread': 'first',
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  'message.html.compose': 'first',
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  'message.html.markdown': 'first',
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  'message.html.timeago': 'first',
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  'message.html.likes': 'first',
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  'unread.sync.markRead': 'first',
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  'unread.sync.isUnread': 'first',
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  'translations.sync.strings': 'first',
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})
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exports.create = (api) => {
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  return nest('app.html.comments', comments)
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  function comments (thread) {
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    const strings = api.translations.sync.strings()
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    const { messages, channel, lastId: branch } = thread
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    // TODO - move this up into Patchcore
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    const messagesTree = computed(throttle(messages, 200), msgs => {
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      return msgs
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        .filter(msg => forkOf(msg) === undefined)
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        .map(threadMsg => { 
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          const nestedReplies = msgs.filter(msg => forkOf(msg) === threadMsg.key)
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          threadMsg.replies = nestedReplies
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          return threadMsg
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        })
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    })
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    const root = computed(messages, ary => ary[0].key)
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    const meta = {
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      type: 'post',
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      root,
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      branch,
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      channel
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    }
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    // const twoComposers = computed(messages, messages => {
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    //   return messages.length > 5
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    // })
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    const { compose } = api.message.html
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    const feedIdsInThread = computed(thread.messages, msgs => {
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      return msgs.map(m => m.value.author)
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    })
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    return h('Comments', [
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      // when(twoComposers, compose({ meta, shrink: true, canAttach: false })),
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      map(messagesTree, msg => Comment(msg, root, branch)),
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      compose({ meta, feedIdsInThread, shrink: false, canAttach: true, placeholder: strings.writeComment }),
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    ])
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  }
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  function Comment (msgObs, root, branch) {
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    const strings = api.translations.sync.strings()
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    const msg = resolve(msgObs)
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    const raw = get(msg, 'value.content.text')
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    var className = api.unread.sync.isUnread(msg) ? ' -unread' : ' -read'
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    api.unread.sync.markRead(msg)
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    if (!get(msg, 'value.content.root')) return
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    const { author, content } = msg.value
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    // // TODO - move this upstream into patchcore:feed.obs.thread ??
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    // // OR change strategy to use forks
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    // const backlinks = api.backlinks.obs.for(msg.key) 
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    // const nestedReplies = computed(backlinks, backlinks => {
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    //   return backlinks.filter(backlinker => {
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    //     const { type, root } = backlinker.value.content
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    //     return type === 'post' && root === msg.key
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    //   })
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    // })
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    var nestedReplyCompose = Value(false)
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    const toggleCompose = () => nestedReplyCompose.set(!nestedReplyCompose())
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    const nestedReplyComposer = api.message.html.compose({
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      meta: {
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        type: 'post',
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        root,
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        fork: msg.key,
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        branch,
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        channel: content.channel
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      },
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      shrink: false,
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      canAttach: true,
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      canPreview: false,
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      placeholder: strings.writeComment 
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    }, toggleCompose)
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    return h('Comment', { className }, [
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      h('div.left', api.about.html.avatar(author, 'tiny')),
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      h('div.right', [
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        h('section.context', [
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          h('div.name', api.about.obs.name(author)),
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          api.message.html.timeago(msg)
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        ]),
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        h('section.content', api.message.html.markdown(raw)),
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        when(msgObs.replies, 
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          h('section.replies', 
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            map(msgObs.replies, NestedComment)
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          )
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        ),
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        h('section.actions', [
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          h('div.reply', { 'ev-click': toggleCompose }, [ 
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            h('i.fa.fa-commenting-o'),
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          ]),
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          api.message.html.likes(msg)
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        ]),
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        when(nestedReplyCompose, nestedReplyComposer),
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      ])
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    ])
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  }
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  function NestedComment (msgObs) {
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    const msg = resolve(msgObs)
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    const raw = get(msg, 'value.content.text')
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    if (!raw) return
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    const { author } = msg.value
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    return h('Comment -nested', [
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      h('div.left'),
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      h('div.right', [
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        h('section.context', [
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          h('div.name', api.about.obs.name(author)),
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          api.message.html.timeago(msg)
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        ]),
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        h('section.content', api.message.html.markdown(raw)),
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      ])
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    ])
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    api.message.html.markdown(raw)
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  }
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}
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function forkOf (msg) {
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  return get(msg, 'value.content.fork')
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}
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