@tanstack/db/dist/esm/utils/comparison.js

A reactive client store for building super fast apps on sync

const objectIds = /* @__PURE__ */ new WeakMap();
let nextObjectId = 1;
function getObjectId(obj) {
  if (objectIds.has(obj)) {
    return objectIds.get(obj);
  }
  const id = nextObjectId++;
  objectIds.set(obj, id);
  return id;
}
const ascComparator = (a, b) => {
  if (a == null && b == null) return 0;
  if (a == null) return -1;
  if (b == null) return 1;
  if (typeof a === `string` && typeof b === `string`) {
    return a.localeCompare(b);
  }
  if (Array.isArray(a) && Array.isArray(b)) {
    for (let i = 0; i < Math.min(a.length, b.length); i++) {
      const result = ascComparator(a[i], b[i]);
      if (result !== 0) {
        return result;
      }
    }
    return a.length - b.length;
  }
  if (a instanceof Date && b instanceof Date) {
    return a.getTime() - b.getTime();
  }
  const aIsObject = typeof a === `object`;
  const bIsObject = typeof b === `object`;
  if (aIsObject || bIsObject) {
    if (aIsObject && bIsObject) {
      const aId = getObjectId(a);
      const bId = getObjectId(b);
      return aId - bId;
    }
    if (aIsObject) return 1;
    if (bIsObject) return -1;
  }
  if (a < b) return -1;
  if (a > b) return 1;
  return 0;
};
const descComparator = (a, b) => {
  return ascComparator(b, a);
};
export {
  ascComparator,
  descComparator
};
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