mongoose-diff-tracking/example/node_modules/power-assign/src/retarget-to-prop.js

Manage Mongo Collection diff History and versions

// @flow
import {
  normalizeUpdateOperation,
} from 'oad-utils/jsnext'

import type {
  RegularUpdateOperation,
  SetOperator,
  UpdateOperation,
  UpdateOperator,
  DocumentPath,
} from 'mongolike-operations'

/**
 * Retarget the given UpdateOperation to the given docPath.
 */
export function retargetToProp(docPath: DocumentPath, _operation: SetOperator | UpdateOperation): RegularUpdateOperation {

  const operation = normalizeUpdateOperation(_operation)
  const newOps: UpdateOperator = {}
  const operatorNames = Object.keys(operation)

  for (const operatorName of operatorNames) {
    const operator: UpdateOperator = operation[operatorName]
    // $FlowIssue(newOps-can-have-property-of-operatorName)
    newOps[operatorName] = {}
    Object.keys(operator).forEach(originalDocPath => {
      const newDocPath = [docPath, originalDocPath].join('.')
      // $FlowIssue(newOps-can-have-new-property)
      newOps[operatorName][newDocPath] = operator[originalDocPath]
    })
  }
  return newOps
}

export function retargetToPropWithRestoration(docPath: DocumentPath, _operation: SetOperator | UpdateOperation): RegularUpdateOperation {
  const operation = retargetToProp(docPath, _operation)

  const $restore = operation.$restore || {}
  $restore[docPath] = ''

  // here we write to the operation (mutable)
  return Object.assign(operation, { $restore })
}