json-schema-library/src/keywords/allOf.ts

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

import { mergeSchema } from "../utils/mergeSchema";
import { Keyword, JsonSchemaReducerParams, JsonSchemaValidatorParams, ValidationResult } from "../Keyword";
import { SchemaNode } from "../types";
import { validateNode } from "../validateNode";

export const allOfKeyword: Keyword = {
    id: "allOf",
    keyword: "allOf",
    parse: parseAllOf,
    addReduce: (node: SchemaNode) => node.allOf != null,
    reduce: reduceAllOf,
    addValidate: (node) => node.allOf != null,
    validate: validateAllOf
};

export function parseAllOf(node: SchemaNode) {
    const { schema, evaluationPath } = node;
    if (Array.isArray(schema.allOf) && schema.allOf.length) {
        node.allOf = schema.allOf.map((s, index) =>
            node.compileSchema(s, `${evaluationPath}/allOf/${index}`, `${node.schemaLocation}/allOf/${index}`)
        );
    }
}

function reduceAllOf({ node, data, key, pointer, path }: JsonSchemaReducerParams) {
    if (node.allOf == null) {
        return;
    }

    // note: parts of schemas could be merged, e.g. if they do not include
    // dynamic schema parts
    let mergedSchema = {};
    let dynamicId = "";
    for (let i = 0; i < node.allOf.length; i += 1) {
        const { node: schemaNode } = node.allOf[i].reduceNode(data, { key, pointer, path });
        if (schemaNode) {
            const nestedDynamicId = schemaNode.dynamicId?.replace(node.dynamicId, "") ?? "";
            const localDynamicId = nestedDynamicId === "" ? `allOf/${i}` : nestedDynamicId;
            dynamicId += `${dynamicId === "" ? "" : ","}${localDynamicId}`;

            const schema = mergeSchema(node.allOf[i].schema, schemaNode.schema);
            mergedSchema = mergeSchema(mergedSchema, schema, "allOf", "contains");
        }
    }

    return node.compileSchema(
        mergedSchema,
        `${node.evaluationPath}/${dynamicId}`,
        node.schemaLocation,
        `${node.schemaLocation}(${dynamicId})`
    );
}

function validateAllOf({ node, data, pointer, path }: JsonSchemaValidatorParams) {
    if (!Array.isArray(node.allOf) || node.allOf.length === 0) {
        return;
    }
    const errors: ValidationResult[] = [];
    node.allOf.forEach((allOfNode) => {
        errors.push(...validateNode(allOfNode, data, pointer, path));
    });
    return errors;
}