git ssb

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const nest = require('depnest')
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const { h } = require('mutant')
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const isString = require('lodash/isString')
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const More = require('hypermore')
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const morphdom = require('morphdom')
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const Debounce = require('obv-debounce')
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exports.gives = nest('app.page.home')
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exports.needs = nest({
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  'history.sync.push': 'first',
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  'keys.sync.id': 'first',
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  'translations.sync.strings': 'first',
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  'state.obs.threads': 'first',
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  'app.html.threadCard': 'first',
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  'unread.sync.isUnread': 'first'
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})
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function toRecpGroup(msg) {
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  //cannocialize
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  return Array.isArray(msg.value.content.repcs) &&
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    msg.value.content.recps.map(function (e) {
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    return (isString(e) ? e : e.link)
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  }).sort().map(function (id) {
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    return id.substring(0, 10)
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  }).join(',')
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}
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exports.create = (api) => {
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  return nest('app.page.home', function (location) {
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    // location here can expected to be: { page: 'home'}
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    var strings = api.translations.sync.strings()
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    // function filterForThread (thread) {
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    //   if(thread.value.private)
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    //     return {private: toRecpGroup(thread)}
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    //   else if(thread.value.content.channel)
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    //     return {channel: thread.value.content.channel}
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    // }
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    // function filter (rule, thread) {
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    //   if(!thread.value) return false
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    //   if(!rule) return true
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    //   if(rule.channel) {
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    //     return rule.channel == thread.value.content.channel
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    //   }
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    //   else if(rule.group)
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    //     return rule.group == thread.value.content.group
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    //   else if(rule.private)
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    //     return rule.private == toRecpGroup(thread)
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    //   else return true
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    // }
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    var morePlease = false
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    var threadsObs = api.state.obs.threads()
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    // DUCT TAPE: debounce the observable so it doesn't
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    // update the dom more than 1/second
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    threadsObs(function () {
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      if(morePlease) threadsObs.more()
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    })
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    threadsObsDebounced = Debounce(threadsObs, 1000)
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    threadsObsDebounced(function () {
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      morePlease = false
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    })
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    threadsObsDebounced.more = function () {
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      morePlease = true
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      requestIdleCallback(threadsObs.more)
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    }
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    var container = h('div.container', [])
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    var threadsHtmlObs = More(
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      threadsObsDebounced,
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      function render (threads) {
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        function latestUpdate(thread) {
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          var m = thread.timestamp
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          if(!thread.replies) return m
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          for(var i = 0; i < thread.replies.length; i++)
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            m = Math.max(thread.replies[i].timestamp, m)
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          return m
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        }
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        function roots (r) {
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          return Object.keys(r || {}).map(function (k) {
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            return threads.roots[r[k]]
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          }).filter(function (e) {
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            return e && e.value
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          })
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        }
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        var groupedThreads =
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        roots(threads.private)
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        .concat(roots(threads.channels))
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        .concat(roots(threads.groups))
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        .filter(function (thread) {
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          return thread.value.content.recps || thread.value.content.channel
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        })
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        .map(function (thread) {
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          var unread = 0
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          if(api.unread.sync.isUnread(thread))
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            unread ++
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          ;(thread.replies || []).forEach(function (msg) {
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            if(api.unread.sync.isUnread(msg)) unread ++
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          })
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          thread.unread = unread
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//          console.log('unread', thread.unread, +!!thread.unread)
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          return thread
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        })
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        .sort(function (a, b) {
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          return ((!!b.unread) - (!!a.unread)) || (latestUpdate(b) - latestUpdate(a))
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        })
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//        console.log(groupedThreads.map(function (thread) {
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//          return {ch: thread.value.content.channel, unread: thread.unread, thread: thread}
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//        }))
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//
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        morphdom(container,
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          // LEGACY: some of these containers could be removed
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          // but they are here to be compatible with the old MCSS.
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          h('div.container', [
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            //private section
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            h('section.updates -directMessage', [
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              h('div.threads',
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                groupedThreads.map(thread => {
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                  const channel = thread.value.content.channel
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                  const onClick = channel
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                    ? (ev) => api.history.sync.push({ channel })
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                    : null // threadCard will install default onClick
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                  return api.app.html.threadCard(thread, { onClick })
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                })
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              )
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            ])
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         ])
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       )
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      return container
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      }
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    )
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    return h('Page -home', {title: strings.home}, [
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      threadsHtmlObs,
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      h('button', {'ev-click': threadsHtmlObs.more}, [strings.showMore])
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    ])
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  })
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}
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