git ssb

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const nest = require('depnest')
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const { isBlobLink, isFeed, isMsg, parseLink } = require('ssb-ref')
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const ssbUri = require('ssb-uri')
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exports.gives = nest('router.async.normalise')
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exports.needs = nest({
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  'message.sync.unbox': 'first',
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  'sbot.async.get': 'first'
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})
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exports.create = (api) => {
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  return nest('router.async.normalise', normalise)
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  function normalise (location, cb) {
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    if (typeof location === 'object') {
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      cb(null, location)
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      return true
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    }
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    // if someone has given you an annoying html encoded location
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    if (location.match(/^%25.*%3D.sha256$/)) {
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      location = decodeURIComponent(location)
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    }
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    if (location.startsWith('ssb:')) {
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      try {
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        location = ssbUri.toSigilLink(location)
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      } catch (err) {
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        cb(err)
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      }
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    }
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    var link = parseLink(location)
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    if (link && isMsg(link.link)) {
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      var params = { id: link.link }
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      if (link.query && link.query.unbox) {
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        params.private = true
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        params.unbox = link.query.unbox
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      }
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      api.sbot.async.get(params, function (err, value) {
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        if (err) cb(err)
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        else {
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          if (typeof value.content === 'string') value = api.message.sync.unbox(value)
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          cb(null, { key: link.link, value })
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        }
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      })
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    } else if (isBlobLink(location)) {
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      // handles public & private blobs
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      // TODO - parse into link and query?
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      cb(null, { blob: location })
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    } else if (isChannelMulti(location)) cb(null, { channels: location.split('+') })
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    else if (isChannel(location)) cb(null, { channel: location })
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    else if (isFeed(location)) cb(null, { feed: location })
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    else if (isPage(location)) cb(null, { page: location.substring(1) })
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    return true
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  }
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}
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function isChannelMulti (str) {
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  if (typeof str !== 'string') return false
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  const channels = str.split('+')
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  return channels.length > 1 && channels.every(isChannel)
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}
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function isChannel (str) {
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  return typeof str === 'string' && str[0] === '#' && str.length > 1
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}
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function isPage (str) {
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  return typeof str === 'string' && str[0] === '/' && str.length > 1
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}
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