git ssb

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var nest = require('depnest')
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var h = require('mutant/h')
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var when = require('mutant/when')
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var computed = require('mutant/computed')
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var send = require('mutant/send')
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exports.needs = nest({
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  'about.obs.name': 'first',
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  'about.html.image': 'first',
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  'keys.sync.id': 'first',
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  'sheet.display': 'first',
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  'app.navigate': 'first',
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  'intl.sync.i18n': 'first',
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  'intl.sync.i18n_n': 'first',
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  'sheet.profiles': 'first',
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  'channel.html.subscribeToggle': 'first',
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  'channel.sync.normalize': 'first',
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  'channel.obs.subscribers': 'first',
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  'contact.obs.following': 'first'
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})
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exports.gives = nest('channel.html.preview')
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exports.create = function (api) {
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  const i18n = api.intl.sync.i18n
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  const plural = api.intl.sync.i18n_n
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  return nest('channel.html.preview', function (id) {
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    var yourId = api.keys.sync.id()
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    var channel = api.channel.sync.normalize(id)
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    var href = '#' + channel
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    var subscribers = api.channel.obs.subscribers(id)
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    var following = api.contact.obs.following(yourId)
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    var followingSubscribers = computed([subscribers, following], (a, b) => {
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      return a.filter(v => b.includes(v))
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    })
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    var followingSubscriberCount = computed(followingSubscribers, x => x.length)
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    return h('ProfilePreview', [
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      h('header', [
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        h('div.main', [
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          h('div.title', [
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            h('h1', [
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              h('a', {href, 'ev-click': () => api.app.navigate(href)}, [href])
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            ]),
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            h('div.meta', [
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              api.channel.html.subscribeToggle(channel)
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            ])
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          ])
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        ])
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      ]),
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      when(followingSubscriberCount,
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        h('section -mutualFriends', [
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          h('a', {
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            href: '#',
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            'ev-click': send(displaySubscribingFriends, followingSubscribers)
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          }, [
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            '👥 ', computed(['You follow %s people that subscribe to this channel.', followingSubscriberCount], plural)
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          ])
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        ])
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      )
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    ])
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  })
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  function displaySubscribingFriends (profiles) {
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    api.sheet.profiles(profiles, i18n('People you follow that subscribe to this channel'))
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  }
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}
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