json-schema-library/dist/module/src/keywords/uniqueItems.js

Customizable and hackable json-validator and json-schema utilities for traversal, data generation and validation

import deepEqual from "fast-deep-equal";
export const uniqueItemsKeyword = {
    id: "uniqueItems",
    keyword: "uniqueItems",
    addValidate: ({ schema }) => schema.uniqueItems === true,
    validate: validateUniqueItems
};
function validateUniqueItems({ node, data, pointer }) {
    if (!Array.isArray(data)) {
        return undefined;
    }
    const { schema } = node;
    const duplicates = [];
    const errors = [];
    data.forEach((item, index) => {
        for (let i = index + 1; i < data.length; i += 1) {
            if (deepEqual(item, data[i]) && !duplicates.includes(i)) {
                errors.push(node.createError("unique-items-error", {
                    pointer: `${pointer}/${i}`,
                    duplicatePointer: `${pointer}/${index}`,
                    arrayPointer: pointer,
                    value: JSON.stringify(item),
                    schema
                }));
                duplicates.push(i);
            }
        }
    });
    return errors;
}