generatingDocumentation.js

import parser from "./nonSequentialActions.js"

function generateDocumentation (parser) {
  switch (parser.action) {
    case "pure":
      return null

    case "stringField":
      return { [parser.key]: "string" }

    case "numberField":
      return { [parser.key]: "number" }

    case "objectField":
      return { [parser.key]: generateDocumentation(parser.parser) }

    case "apply":
      const doc1 = generateDocumentation(parser.parser1)
      const doc2 = generateDocumentation(parser.parser2)

      if (doc1 === null) {
        return doc2
      } else if (doc2 === null) {
        return doc1
      } else {
        return {...doc1, ...doc2}
      }
  }
}

console.log(generateDocumentation(parser))