@beignet/core/dist/openapi/schema-introspector.js

Core framework primitives for Beignet

import { z } from "zod";
import { getObjectSchemaShape } from "../contracts/schema-shape.js";
/**
 * Create the default schema converter for Zod schemas.
 */
export function createZodSchemaConverter() {
    return {
        name: "zod",
        canConvert(schema) {
            return schema instanceof z.ZodType;
        },
        toJSONSchema(schema, context) {
            const jsonSchema = z.toJSONSchema(schema, {
                target: "draft-2020-12",
                unrepresentable: "any",
                io: context.io,
            });
            delete jsonSchema.$schema;
            return jsonSchema;
        },
    };
}
/**
 * Create a schema introspector for Zod schemas.
 *
 * This accesses Zod's internal `_def` property, which is a common pattern in
 * Zod ecosystem libraries but may break with major Zod updates. Each helper
 * gracefully returns a safe default if the structure is unexpected.
 */
export function createZodIntrospector() {
    return {
        getShape(schema) {
            return getObjectSchemaShape(schema);
        },
        getDescription(schema) {
            if (!schema || typeof schema !== "object")
                return undefined;
            const directDescription = schema
                .description;
            if (typeof directDescription === "string") {
                return directDescription;
            }
            const schemaDef = schema?._def;
            if (!schemaDef || typeof schemaDef !== "object")
                return undefined;
            const description = schemaDef.description;
            return typeof description === "string" ? description : undefined;
        },
        isOptional(schema) {
            if (!schema || typeof schema !== "object")
                return false;
            const schemaWithOptional = schema;
            if (typeof schemaWithOptional.isOptional === "function") {
                return schemaWithOptional.isOptional();
            }
            const schemaDef = schema?._def;
            if (!schemaDef || typeof schemaDef !== "object")
                return false;
            const def = schemaDef;
            return def.typeName === "ZodOptional" || def.type === "optional";
        },
        unwrapOptional(schema) {
            const schemaDef = schema?._def;
            const def = schemaDef;
            if (def?.typeName !== "ZodOptional" && def?.type !== "optional") {
                return schema;
            }
            const innerType = def?.innerType;
            return innerType ?? schema;
        },
    };
}
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