git ssb

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const nest = require('depnest')
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const ref = require('ssb-ref')
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const { Value, Struct, Dict } =  require('mutant')
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exports.needs = nest({
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  'book.pull.get': 'first',
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  'book.obs.struct': 'first',
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  'sbot.async.publish': 'first'
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})
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exports.gives = nest('book.obs.book')
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exports.create = function (api) {
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  return nest('book.obs.book', function (id) {
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    if (!ref.isLink(id)) throw new Error('a valid id must be specified')
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    let book = api.book.obs.struct({ key: id })
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    api.book.pull.get(id, dbBook => {
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      Object.keys(dbBook.common).forEach((k) => {
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        if (dbBook.common[k]) {
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          book[k].set(dbBook.common[k])
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        }
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      })
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      Object.keys(dbBook.subjective).forEach((k) => {
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        var d = {}
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        Object.keys(dbBook.subjective[k]).forEach((v) => {
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          d[v] = Value(dbBook.subjective[k][v])
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        })
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        book.subjective.put(k, Struct(d))
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      })
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    })
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    book.amend = function(cb)
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    {
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      let msg = { type: 'bookclub-update', root: id }
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      let s = book()
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      msg.common = {
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        title: s.title,
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        authors: s.authors,
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        description: s.description,
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        images: s.images
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      }
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      /* FIXME
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      if (book.subjective)
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        msg.subjective = subjectiveObj
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       */
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      api.sbot.async.publish(msg, cb)
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    }
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    return book
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  })
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}
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