tupleson/lib/sync/deserialize.mjs

A hackable JSON serializer/deserializer

import { isTsonTuple } from '../internals/isTsonTuple.mjs';
import { mapOrReturn } from '../internals/mapOrReturn.mjs';
function createTsonDeserialize(opts) {
  const typeByKey = {};
  for (const handler of opts.types) {
    if (handler.key) {
      if (typeByKey[handler.key]) {
        throw new Error(`Multiple handlers for key ${handler.key} found`);
      }
      typeByKey[handler.key] = handler;
    }
  }
  const walker = (nonce) => {
    const walk = (value) => {
      if (isTsonTuple(value, nonce)) {
        const [type, serializedValue] = value;
        const transformer = typeByKey[type];
        return transformer.deserialize(walk(serializedValue));
      }
      return mapOrReturn(value, walk);
    };
    return walk;
  };
  return (obj) => walker(obj.nonce)(obj.json);
}
function createTsonParser(opts) {
  const deserializer = createTsonDeserialize(opts);
  return (str) => deserializer(JSON.parse(str));
}
export {
  createTsonDeserialize,
  createTsonParser
};
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