git ssb

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const nest = require('depnest')
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const { h, map, Struct, computed, 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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  'message.html.comment': 'first',
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  'message.html.compose': '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, 500), msgs => {
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      return msgs
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        .filter(msg => forkOf(msg) === undefined) // exclude nested replies / forks
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        .filter(msg => msg.value.content.root) // exclude root message / blog
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        .map(comment => {
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          return Struct({
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            comment,
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            replies: msgs.filter(msg => forkOf(msg) === comment.key)
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          })
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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(
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        messagesTree,
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        msg => api.message.html.comment({ comment: msg.comment, replies: msg.replies, branch }),
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        {
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          comparer: (a, b) => {
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            if (a === undefined || b === undefined) return false
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            return a.comment().key === b.comment().key && a.replies().length === b.replies().length
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          }
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        }
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      ),
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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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}
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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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