git ssb

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var { h, when, map, Proxy, Struct, Value, computed } = require('mutant')
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var nest = require('depnest')
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var ref = require('ssb-ref')
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exports.needs = nest({
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  'keys.sync.id': 'first',
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  'feed.obs.thread': 'first',
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  'message.sync.unbox': 'first',
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  'message.html': {
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    render: 'first',
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    compose: 'first'
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  },
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  'sbot.async.get': 'first'
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})
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exports.gives = nest('page.html.render')
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exports.create = function (api) {
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  return nest('page.html.render', function channel (id) {
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    if (!ref.isMsg(id)) return
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    var loader = h('div', {className: 'Loading -large'})
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    var result = Proxy(loader)
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    var meta = Struct({
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      type: 'post',
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      root: Proxy(id),
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      branch: Proxy(id),
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      channel: Value(undefined),
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      recps: Value(undefined)
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    })
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    var compose = api.message.html.compose({
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      meta,
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      shrink: false,
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      placeholder: when(meta.recps, 'Write a private reply', 'Write a public reply')
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    })
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    api.sbot.async.get(id, (err, value) => {
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      if (err) return result.set(h('div', {className: 'Error'}, ['Cannot load thead']))
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      if (typeof value.content === 'string') {
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        value = api.message.sync.unbox(value)
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      }
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      // what happens in private stays in private!
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      meta.recps.set(value.content.recps)
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      var isReply = !!value.content.root
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      var thread = api.feed.obs.thread(id, {branch: isReply})
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      meta.channel.set(value.content.channel)
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      meta.root.set(thread.rootId)
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      // if root thread, reply to last post
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      meta.branch.set(isReply ? thread.branchId : thread.lastId)
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      var container = h('Thread', [
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        when(thread.branchId, h('a.full', {href: thread.rootId}, ['View full thread'])),
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        map(thread.messages, (msg) => {
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          return computed([msg, thread.previousKey(msg)], (msg, previousId) => {
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            return api.message.html.render(msg, {previousId, backlinks: true})
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          })
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        }),
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        compose
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      ])
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      result.set(when(thread.sync, container, loader))
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    })
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    return h('div', {className: 'SplitView'}, [
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      h('div.main', [
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        result
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      ])
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    ])
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  })
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}
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