git ssb

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var nest = require('depnest')
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var { h, map, computed } = require('mutant')
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exports.needs = nest({
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  'message.obs': {
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    backlinks: 'first',
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    forks: 'first',
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    name: 'first',
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    author: 'first'
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  },
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  'profile.html.person': 'first'
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})
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exports.gives = nest('message.html.backlinks')
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exports.create = function (api) {
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  return nest('message.html.backlinks', function (msg, {includeReferences = true, includeForks = true} = {}) {
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    var references = includeReferences ? api.message.obs.backlinks(msg.key) : []
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    var forks = (includeForks && msg.value.content.root) ? api.message.obs.forks(msg.key) : []
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    return [
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      map(forks, msgId => {
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        return h('a.backlink', {
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          href: msgId,
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          title: msgId
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        }, [
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          h('strong', [
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            authorLink(msgId), ' forked this discussion:'
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          ]), ' ',
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          api.message.obs.name(msgId)
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        ])
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      }),
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      map(references, msgId => {
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        return h('a.backlink', {
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          href: msgId,
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          title: msgId
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        }, [
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          h('strong', [
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            authorLink(msgId), ' referenced this message:'
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          ]), ' ',
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          api.message.obs.name(msgId)
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        ])
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      })
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    ]
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  })
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  function authorLink (msgId) {
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    var author = api.message.obs.author(msgId)
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    return computed(author, author => {
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      if (author) {
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        return api.profile.html.person(author)
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      } else {
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        return 'Someone'
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      }
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    })
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  }
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}
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