git ssb

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const isBlog = require('../isBlog')
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// TODO take blog or blogKey?
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module.exports = function (server) {
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  return function fetch (blog, cb) {
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    if (!isBlog(blog)) return cb(new Error(`Not a valid blog ${JSON.stringify(blog, null, 2)}`))
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    server.blobs.want(getBlob(blog), (err, success) => {
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      if (err) {
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        if (cb) return cb(err)
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        else throw err
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      }
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      cb(null, success)
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    })
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  }
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}
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function getBlob (msg) {
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  // is msg of form { key, value }
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  if (msg.value.content && msg.value.content.blog) return msg.value.content.blog
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  // is just body of the message, 'msg content'
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  else if (msg.blog) return msg.blog
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}
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