INNER CODE UNIT · JavaScript

migrate

zulip/zulip-mobile · src/redux-persist-migrate/index.js:67

  const migrate = (state, version) => {
    let newState = state;
    versionKeys
      .filter(v => v > version || version === null)
      .forEach(v => {
        newState = manifest[v.toString()](newState);
      });

    newState = versionSetter(newState, currentVersion);
    return newState;
  };

  return function migratePayload(incomingState: PartialState): PartialState {
    const incomingVersion = parseInt(versionSelector(incomingState), 10);
    if (Number.isNaN(incomingVersion)) {
      // first launch after install, so incoming state is empty object
      // migration not required, just update version
      const payload = versionSetter(incomingState, currentVersion);

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