Function parseAndApply

lib/src/commit.ts:221–261

(jsonAdObjStr: string, store: Store)

/** Parses a JSON-AD Commit, applies it to the store. Does not perform checks */
export function parseAndApply(jsonAdObjStr: string, store: Store) {
  const jsonAdObj = JSON.parse(jsonAdObjStr);
  // Parses the commit
  const subject = jsonAdObj[urls.properties.commit.subject];
  const set = jsonAdObj[urls.properties.commit.set];
  const remove: string[] | undefined = jsonAdObj[urls.properties.commit.remove];
  const destroy: boolean | undefined =
    jsonAdObj[urls.properties.commit.destroy];
  // const createdAt = jsonAdObj[urls.properties.commit.createdAt];
  // const signer = jsonAdObj[urls.properties.commit.signer];
  const signature = jsonAdObj[urls.properties.commit.signature];

  let resource = store.resources.get(subject);

  // If the resource doesn't exist in the store, create the resource
  if (resource == undefined) {
    resource = new Resource(subject);
  } else {
    if (resource.appliedCommitSignatures.has(signature)) {
      return;
    }
  }

  set &&
    Object.keys(set).forEach(propUrl => {
      resource.setUnsafe(propUrl, set[propUrl]);
    });

  remove &&
    remove.forEach(propUrl => {
      resource.removePropValLocally(propUrl);
    });

  if (destroy) {
    store.removeResource(subject);
    return;
  } else {
    resource.appliedCommitSignatures.add(signature);
    store.addResource(resource);
  }
}