git ssb

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const { Struct, Value, Array: MutantArray, Dict } = require('mutant')
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const { isBlob } = require('ssb-ref')
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function Book (key) {
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  return Struct({
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    key,
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    value: Value(),
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    latestAttributes: Dict(), // attributes according to each user
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    errors: MutantArray (),
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    sync: false
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  })
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}
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module.exports = function (server) {
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  return function (key) {
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    // TODO take key or msg?
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    const book = Book(key)
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    server.get(key, (err, msgVal) => {
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      if (err) return book.errors.push(err)
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      // TODO run isBook?
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      book.value.set(msgVal)
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      updateLatestAttributes(book, msgVal)
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      // TODO figure out where to put this
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      book.sync.set(true)
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    })
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    return book
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  }
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}
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function updateLatestAttributes (book, msgVal) {
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  // TODO check isBook / isBookUpdate?
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  const { author: user, content } = msgVal
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  prune(content)
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  normalizeImages(content)
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  const currentAttributes = book.latestAttributes.get(user) || {}
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  const latestAttributes = Object.assign({}, currentAttributes, content)
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  book.latestAttributes.put(user, latestAttributes)
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}
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function prune (content) {
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  // prune attributes we don't want in the final attributes
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  delete content.type
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  delete content.about
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}
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function normalizeImages (content) {
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  if (!content.image) return
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  var blob
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  if (typeof content.image === 'string') blob = content.image
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  if (content.image && content.image.link) blob = content.image.link
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  if (!isBlob(blob)) return delete content.image
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  content.image = blob
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}
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