git ssb

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const https = require('https')
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const packageInfo = require('../package.json')
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const compareVersion = require('compare-version')
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const Value = require('mutant/value')
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const computed = require('mutant/computed')
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module.exports = function () {
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  const update = Value()
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  const hidden = Value(false)
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  update.sync = Value(false)
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  const version = packageInfo.version
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  const checkForUpdate = () => {
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    // Check whether notification has been hidden.
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    if (hidden() === true) {
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      // If so, stop the interval timer.
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      clearInterval(updateCheckInterval)
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      // And `return` to quit this function.
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      return
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    }
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    https.get({
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      host: 'api.github.com',
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      path: '/repos/ssbc/patchwork/releases/latest',
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      headers: {
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        'user-agent': `Patchwork v${version}`
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      }
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    }, function (res) {
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      if (res.statusCode === 200) {
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        let result = ''
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        res.on('data', (x) => {
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          result += x
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        }).on('end', () => {
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          const info = JSON.parse(result)
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          if (compareVersion(info.tag_name.slice(1), version) > 0) {
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            update.set(info.tag_name.slice(1))
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          }
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          update.sync.set(true)
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        })
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      }
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      // You must handle the error here otherwise you get an unhandled error exception which stops the whole app.
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    }).on('error', function (error) {
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      console.log('error trying to reach github to check for latest patchwork version: ', error)
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    })
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  }
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  // Retry update check every 24 hours.
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  const millisecondsPerDay = 1000 * 60 * 60 * 24
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  // Previously we only checked for updates on startup, but some people keep
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  // Patchwork running in the background all the time and they should get
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  // update notifications too.
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  const updateCheckInterval = setInterval(checkForUpdate, millisecondsPerDay)
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  // Check for update immediately.
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  checkForUpdate()
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  const obs = computed([update, hidden], (update, hidden) => update && !hidden ? update : false)
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  obs.ignore = () => hidden.set(true)
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  return obs
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}
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