function decodeOps()

in backend/columnar.js [483:510]

• 28 lines of code
• 13 McCabe index (conditional complexity)

function decodeOps(ops, forDocument) {
  const newOps = []
  for (let op of ops) {
    const obj = (op.objCtr === null) ? '_root' : `${op.objCtr}@${op.objActor}`
    const elemId = op.keyStr ? undefined : (op.keyCtr === 0 ? '_head' : `${op.keyCtr}@${op.keyActor}`)
    const action = ACTIONS[op.action] || op.action
    const newOp = elemId ? {obj, elemId, action} : {obj, key: op.keyStr, action}
    newOp.insert = !!op.insert
    if (ACTIONS[op.action] === 'set' || ACTIONS[op.action] === 'inc') {
      newOp.value = op.valLen
      if (op.valLen_datatype) newOp.datatype = op.valLen_datatype
    }
    if (!!op.chldCtr !== !!op.chldActor) {
      throw new RangeError(`Mismatched child columns: ${op.chldCtr} and ${op.chldActor}`)
    }
    if (op.chldCtr !== null) newOp.child = `${op.chldCtr}@${op.chldActor}`
    if (forDocument) {
      newOp.id = `${op.idCtr}@${op.idActor}`
      newOp.succ = op.succNum.map(succ => `${succ.succCtr}@${succ.succActor}`)
      checkSortedOpIds(op.succNum.map(succ => ({counter: succ.succCtr, actorId: succ.succActor})))
    } else {
      newOp.pred = op.predNum.map(pred => `${pred.predCtr}@${pred.predActor}`)
      checkSortedOpIds(op.predNum.map(pred => ({counter: pred.predCtr, actorId: pred.predActor})))
    }
    newOps.push(newOp)
  }
  return newOps
}