json-schema-describes-subset/dist/built-in-plugins/if-then-else.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 { assertJSONSchema, isJSONSchema, } from '../json-schema/index.js';
import { AllOfSchema, AnyOfSchema, NotSchema, } from '../atomic-schema/index.js';
export function extractIfThenElse(split, ifSchema, thenSchema, elseSchema) {
    const allOf = [];
    if (thenSchema !== undefined) {
        allOf.push(new AnyOfSchema([new NotSchema(split(ifSchema)), split(thenSchema)]));
    }
    if (elseSchema !== undefined) {
        allOf.push(new AnyOfSchema([split(ifSchema), split(elseSchema)]));
    }
    return new AllOfSchema(allOf);
}
export const ifThenElseExtraction = {
    extract: ({ schema, split }) => {
        const { if: ifValue, then: thenValue, else: elseValue } = schema;
        if (!isJSONSchema(ifValue))
            return true;
        return extractIfThenElse(split, ifValue, assertJSONSchema(thenValue), assertJSONSchema(elseValue));
    },
};
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