git ssb

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var ref = require('ssb-ref')
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module.exports = function (tag, data) {
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  if(!tag) tag = {
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    root: data.key,
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    branch: [],
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    creator: data.value.author,
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    created: data.value.timestamp,
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    contents: [],
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    name: null
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  }
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  else {
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    if(data.value.content.type === 'about')
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      tag.name = tag.name || data.value.content.name
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    if(ref.isMsg(data.value.content.message)) {
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      if(data.value.content.tagged === false)
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        tag.contents.splice(tag.contents.indexOf(data.value.content.message), 1)
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      if(!~tag.contents.indexOf(data.value.content.message))
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        tag.contents.push(data.value.content.message)
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    }
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  }
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  return tag
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}
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