json-schema-describes-subset/dist/built-in-plugins/const.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 { AnyOfSchema, AtomicSchemaObject, NotSchema, } from '../atomic-schema/index.js';
export class ConstAtomicSchema extends AtomicSchemaObject {
    const;
    constructor(constValue) {
        super();
        this.const = constValue;
    }
    negate() {
        return new NotSchema(this);
    }
    toJSONSchema() {
        return { const: this.const };
    }
}
export const constExtraction = {
    extract: ({ schema: { const: constValue, enum: enumValues } }) => {
        if (constValue !== undefined) {
            if (!enumValues ||
                (Array.isArray(enumValues) && enumValues.includes(constValue))) {
                return new ConstAtomicSchema(constValue);
            }
            return false;
        }
        if (Array.isArray(enumValues)) {
            return new AnyOfSchema(enumValues.map((value) => new ConstAtomicSchema(value)));
        }
        return true;
    },
};
export const constSimplification = {
    appliesToJSONSchemaType: undefined,
    mergeableKeywords: [],
    simplify({ atomicSchemasByConstructor, validateConst, }) {
        const [constSchema] = atomicSchemasByConstructor.get(ConstAtomicSchema);
        if (constSchema !== undefined) {
            return validateConst(constSchema.const);
        }
        return true;
    },
};
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