git ssb

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var pull = require('pull-stream')
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var memo = require('asyncmemo')
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var lru = require('hashlru')
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module.exports = Follows
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function Follows(sbot, contacts) {
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  if (!(this instanceof Follows)) return new Follows(sbot)
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  this.sbot = sbot
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  this.contacts = contacts
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  var followsCache = lru(100)
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  this.getFollows = memo({cache: followsCache}, this.getFollows)
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  pull(
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    sbot.messagesByType({type: 'contact', old: false}),
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    pull.drain(function (msg) {
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      var author = msg && msg.value && msg.value.author
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      var c = msg && msg.value && msg.value.content
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      var follows = author && followsCache.get(author)
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      if (follows && c && c.contact) follows[c.contact] = c.following
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    }, function (err) {
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      if (err) console.trace(err)
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    })
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  )
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}
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Follows.prototype.getFollows = function (id, cb) {
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  var follows = {}
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  pull(
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    this.contacts.createFollowsStream(id),
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    pull.drain(function (feed) {
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      follows[feed] = true
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    }, function (err) {
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      if (err) return cb(err)
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      cb(null, follows)
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    })
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  )
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}
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Follows.prototype.close = function (cb) {
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  this.sbot.close(cb)
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}
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