@tsed/schema/lib/esm/components/default/nullableMapper.js

JsonSchema module for Ts.ED Framework

import { cleanObject } from "@tsed/core";
import { MANY_OF_PROPERTIES } from "../../constants/jsonSchemaProperties.js";
import { registerJsonSchemaMapper } from "../../registries/JsonSchemaMapperContainer.js";
export function nullableMapper(obj, schema) {
    if (!schema?.isNullable) {
        return obj;
    }
    if (!obj.discriminator) {
        if (obj.$ref) {
            obj = cleanObject({
                ...obj,
                $ref: undefined,
                anyOf: [
                    { type: "null" },
                    {
                        $ref: obj.$ref
                    }
                ]
            });
        }
        else {
            MANY_OF_PROPERTIES.some((keyword) => {
                if (obj[keyword]) {
                    obj[keyword] = obj[keyword].filter((item) => item.type !== "null");
                    if (obj[keyword].length === 1) {
                        const base = obj[keyword];
                        obj = cleanObject({
                            ...obj,
                            ...base[0],
                            [keyword]: undefined,
                            type: ["null", Number.isInteger(obj.multipleOf) ? "integer" : base[0].type]
                        });
                    }
                    else {
                        obj[keyword] = [{ type: "null" }].concat(obj[keyword]).map((item) => {
                            if (Number.isInteger(item.multipleOf)) {
                                item.type = "integer";
                            }
                            return item;
                        });
                        delete obj.type;
                    }
                }
            });
        }
    }
    return obj;
}
registerJsonSchemaMapper("nullable", nullableMapper);