git ssb

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var FlumeReduce = require('flumeview-reduce')
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var normalizeChannel = require('../lib/normalize-channel')
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module.exports = function (ssb, config) {
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  return ssb._flumeUse('patchwork-subscriptions', FlumeReduce(3, reduce, map))
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}
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function reduce (result, item) {
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  if (!result) result = {}
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  if (item) {
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    for (var key in item) {
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      if (!result[key] || result[key][0] < item[key][0]) {
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        result[key] = item[key]
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      }
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    }
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  }
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  return result
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}
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function map (msg) {
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  if (msg.value.content && msg.value.content.type === 'channel') {
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    if (typeof msg.value.content.subscribed === 'boolean') {
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      var channel = normalizeChannel(msg.value.content.channel)
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      if (channel) {
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        var key = `${msg.value.author}:${channel}`
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        return {
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          [key]: [msg.timestamp, msg.value.content.subscribed]
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        }
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      }
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    }
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  }
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}
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