git ssb

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var nest = require('depnest')
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var computed = require('mutant/computed')
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exports.needs = nest({
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  'backlinks.obs.for': 'first'
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})
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exports.gives = nest('message.obs.backlinks', true)
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exports.create = function (api) {
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  return nest({
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    // DEPRECATED: should use backlinks.obs.for
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    'message.obs.backlinks': (id) => backlinks(id)
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  })
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  function backlinks (id) {
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    return computed([api.backlinks.obs.for(id)], (msgs) => {
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      return msgs.map(map).filter((backlink) => {
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        return backlink.type !== 'vote' && backlink.type !== 'about'
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      })
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    })
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  }
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  function map (msg) {
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    return {
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      dest: msg.dest,
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      id: msg.key,
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      timestamp: msg.timestamp,
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      type: msg.value.content.type,
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      root: msg.value.content.root,
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      branch: msg.value.content.branch,
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      author: msg.value.author
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    }
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  }
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}
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