git ssb

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// this shouldn't really be in patchcore, should be its own module (ssb-private)
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var ssbKeys = require('ssb-keys')
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var FlumeQueryLinks = require('./lib/flumeview-links-raw')
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var explain = require('explain-error')
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var pull = require('pull-stream')
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var indexes = [
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  { key: 'TSP', value: ['timestamp'] },
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  { key: 'ATY', value: [['value', 'author'], ['value', 'content', 'type'], 'timestamp'] }
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]
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var indexVersion = 0
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exports.name = 'private'
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exports.version = require('../package.json').version
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exports.manifest = {
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  publish: 'async',
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  unbox: 'sync',
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  read: 'source'
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}
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exports.init = function (ssb, config) {
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  var index = ssb._flumeUse(
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    `private-${ssb.id.slice(1, 10)}`,
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    FlumeQueryLinks(indexes, (msg, emit) => {
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      var value = unbox(msg)
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      if (value) {
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        emit(value)
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      }
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    }, indexVersion)
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  )
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  return {
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    read: function (opts) {
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      return pull(
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        index.read(opts),
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        pull.map(unbox)
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      )
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    },
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    unbox: function (msgOrData) {
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      if (typeof msgOrData === 'string') {
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        try {
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          var data = ssbKeys.unbox(msgOrData, ssb.keys.private)
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        } catch (e) {
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          throw explain(e, 'failed to decrypt')
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        }
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        return data
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      } else if (msgOrData && msgOrData.value && msgOrData.value.content === 'string') {
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        return unbox(msgOrData)
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      }
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    },
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    publish: function (content, recps, cb) {
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      try {
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        var ciphertext = ssbKeys.box(content, recps)
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      } catch (e) {
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        return cb(explain(e, 'failed to encrypt'))
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      }
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      ssb.publish(ciphertext, cb)
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    }
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  }
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  function unbox (msg) {
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    if (typeof msg.value.content === 'string') {
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      var value = unboxValue(msg.value)
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      if (value) {
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        return {
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          key: msg.key, value: value, timestamp: msg.timestamp
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        }
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      }
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    }
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  }
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  function unboxValue (value) {
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    var plaintext = null
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    try {
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      plaintext = ssbKeys.unbox(value.content, ssb.keys.private)
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    } catch (ex) {}
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    if (!plaintext) return null
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    return {
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      previous: value.previous,
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      author: value.author,
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      sequence: value.sequence,
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      timestamp: value.timestamp,
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      hash: value.hash,
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      content: plaintext,
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      private: true
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    }
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  }
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}
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