git ssb

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const { when, h, map } = require('mutant')
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var nest = require('depnest')
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exports.needs = nest({
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  'profile.html.person': 'first',
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  'message.obs.backlinks': 'first',
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  'message.obs.name': 'first',
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  'message.html': {
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    link: 'first',
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    meta: 'map',
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    action: 'map',
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    timestamp: 'first'
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  },
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  'about.html.image': 'first'
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})
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exports.gives = nest('message.html.layout')
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exports.create = function (api) {
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  return nest('message.html.layout', layout)
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  function layout (msg, opts) {
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    if (!(opts.layout === undefined || opts.layout === 'default')) return
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    var backlinks = opts.backlinks ? api.message.obs.backlinks(msg.key) : []
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    var classList = ['Message']
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    var replyInfo = null
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    if (msg.value.content.root) {
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      classList.push('-reply')
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      var branch = msg.value.content.branch
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      if (branch) {
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        if (!opts.previousId || (opts.previousId && last(branch) && opts.previousId !== last(branch))) {
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          replyInfo = h('span', ['in reply to ', api.message.html.link(last(branch))])
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        }
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      }
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    } else if (msg.value.content.project) {
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      replyInfo = h('span', ['on ', api.message.html.link(msg.value.content.project)])
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    }
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    return h('div', {
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      classList
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    }, [
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      messageHeader(msg, replyInfo),
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      h('section', [opts.content]),
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      map(backlinks, backlink => {
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        return h('a.backlink', {
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          href: backlink,
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          title: backlink
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        }, [
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          h('strong', 'Referenced from'), ' ', api.message.obs.name(backlink)
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        ])
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      }),
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      when(msg.key, h('footer', [
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        h('div.actions', [
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          api.message.html.action(msg)
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        ])
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      ]))
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    ])
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    // scoped
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    function messageHeader (msg, replyInfo) {
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      return h('header', [
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        h('div.main', [
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          h('a.avatar', {href: `${msg.value.author}`}, [
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            api.about.html.image(msg.value.author)
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          ]),
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          h('div.main', [
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            h('div.name', [
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              api.profile.html.person(msg.value.author)
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            ]),
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            h('div.meta', [
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              api.message.html.timestamp(msg), ' ', replyInfo
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            ])
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          ])
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        ]),
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        h('div.meta', api.message.html.meta(msg))
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      ])
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    }
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  }
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}
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function last (array) {
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  if (Array.isArray(array)) {
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    return array[array.length - 1]
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  } else {
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    return array
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  }
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}
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