json-schema-describes-subset/dist/schema-describes-subset/schema-describes-subset-factory.js

Tools for static JSON schema analysis, including functions to determine if one schema describes a subset of another or if a schema describes the empty set or to convert a schema to its disjunctive normal form (DNF).

import { getBaseURIsFromOptions, normalizeURI, resolveSchemaArgumentsIds, } from '../id/index.js';
import { mapTuple } from '../utils/type-helpers/type-helpers.js';
/**
 * Factory function to create `schemaDescribesSubset`. `schemaDescribesSubset`
 * is not created directly to avoid cyclic imports when used internally.
 *
 */
export function schemaDescribesSubsetFactory(schemaDescribesEmptySet) {
    return function schemaDescribesSubset(potentialSubsetSchema, potentialSupersetSchema, options) {
        const schemas = [
            potentialSubsetSchema,
            potentialSupersetSchema,
        ];
        const resolved = resolveSchemaArgumentsIds(schemas, options);
        const [resolvedPotentialSubsetSchema, resolvedPotentialSupersetSchema] = resolved.schemas;
        const baseURIs = getBaseURIsFromOptions(options);
        const [sub$id, super$id] = mapTuple(schemas, (schema, index) => {
            const baseURI = baseURIs[index];
            try {
                if (typeof schema === 'boolean' || typeof schema.$id !== 'string') {
                    return normalizeURI(new URL(baseURI ?? '').href);
                }
                return normalizeURI(new URL(schema.$id, baseURI).href);
            }
            catch {
                return undefined;
            }
        });
        if (sub$id !== undefined && sub$id === super$id) {
            // since both schemas have the same `$id` they should be the same schema
            return true;
        }
        return schemaDescribesEmptySet({
            allOf: [
                resolvedPotentialSubsetSchema,
                { not: resolvedPotentialSupersetSchema },
            ],
        }, resolved.options);
    };
}
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