@thi.ng/rstream-query/convert.js

@thi.ng/rstream based triple store & reactive query engine

import { isArray } from "@thi.ng/checks/is-array";
import { isPlainObject } from "@thi.ng/checks/is-plain-object";
import { concat } from "@thi.ng/transducers/concat";
import { mapcat } from "@thi.ng/transducers/mapcat";
import { pairs } from "@thi.ng/transducers/pairs";
let __nextID = 0;
const __mapBNode = (s, p, o) => {
  const id = `__b${__nextID++}__`;
  return concat([[s, p, id]], asTriples(o, id));
};
const __mapSubject = (subject) => ([p, o]) => {
  if (isArray(o)) {
    return mapcat(
      (o2) => isPlainObject(o2) ? __mapBNode(subject, p, o2) : [[subject, p, o2]],
      o
    );
  } else if (isPlainObject(o)) {
    return __mapBNode(subject, p, o);
  }
  return [[subject, p, o]];
};
const asTriples = (obj, subject) => mapcat(
  subject === void 0 ? ([s, v]) => mapcat(__mapSubject(s), pairs(v)) : __mapSubject(subject),
  pairs(obj)
);
export {
  asTriples
};