@tanstack/db/dist/esm/query/equality-value-identity.js

A reactive client store for building super fast apps on sync

import { serializeValue } from "@tanstack/db-ivm";
import { normalizeValue } from "../utils/comparison.js";
import { createRuntimeReferenceIdentityFactory, getRuntimeReferenceIdentity } from "./runtime-reference-identity.js";
const PARENT_CONTEXT = /* @__PURE__ */ Symbol(`tanstack_db_parent_context`);
function equalityIdentity(value, referenceIdentity) {
  const normalized = normalizeValue(value);
  if (typeof normalized === `object` && normalized !== null || typeof normalized === `function` || typeof normalized === `symbol`) {
    return referenceIdentity(normalized);
  }
  return normalized;
}
function exactIdentity(value, referenceIdentity) {
  if (typeof value === `object` && value !== null || typeof value === `function` || typeof value === `symbol`) {
    return referenceIdentity(value);
  }
  if (typeof value === `number`) {
    if (Object.is(value, -0)) return [`number`, `-0`];
    if (Number.isNaN(value)) return [`number`, `NaN`];
  }
  return value;
}
function createValueIdentity() {
  const referenceIdentity = createRuntimeReferenceIdentityFactory();
  const equality = (value) => equalityIdentity(value, referenceIdentity);
  return {
    equality,
    exact: (value) => exactIdentity(value, referenceIdentity),
    serializeEquality: (value) => serializeValue(equality(value))
  };
}
function getEqualityValueIdentity(value) {
  return equalityIdentity(value, getRuntimeReferenceIdentity);
}
function createParentContext(value, identity) {
  return { [PARENT_CONTEXT]: true, value, identity };
}
function isParentContext(context) {
  return typeof context === `object` && context !== null && PARENT_CONTEXT in context;
}
function getParentContextValue(context) {
  if (isParentContext(context)) return context.value;
  if (typeof context === `object` && context !== null) {
    return context;
  }
  return void 0;
}
function getParentContextIdentity(context) {
  return isParentContext(context) ? context.identity : context;
}
export {
  createParentContext,
  createValueIdentity,
  getEqualityValueIdentity,
  getParentContextIdentity,
  getParentContextValue
};
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