@tsed/json-mapper/lib/esm/components/PrimitiveMapper.js

Json mapper module for Ts.ED Framework

import { __decorate } from "tslib";
import { nameOf } from "@tsed/core";
import { JsonMapper } from "../decorators/jsonMapper.js";
function isNullish(data) {
    return [null, "null"].includes(data);
}
/**
 * Error thrown when a primitive conversion cannot be performed safely.
 */
export class CastError extends Error {
    constructor(message) {
        super(`Cast error. ${message}`);
        this.name = "CAST_ERROR";
    }
}
/**
 * Mapper for the `String`, `Number`, `BigInt` and `Boolean` types.
 * @jsonmapper
 * @component
 */
let PrimitiveMapper = class PrimitiveMapper {
    deserialize(data, ctx) {
        return this[nameOf(ctx.type)] ? this[nameOf(ctx.type)](data, ctx) : undefined;
    }
    serialize(object, ctx) {
        return this[nameOf(ctx?.type)] && typeof object !== "object" ? this[nameOf(ctx.type)](object, ctx) : object;
    }
    String(data) {
        return data === null ? null : "" + data;
    }
    Boolean(data) {
        if (["true", "1", true].includes(data))
            return true;
        if (["false", "0", false].includes(data))
            return false;
        if (isNullish(data))
            return null;
        if (data === undefined)
            return undefined;
        return !!data;
    }
    Number(data) {
        if (isNullish(data))
            return null;
        if (data === undefined)
            return data;
        const n = +data;
        if (isNaN(n)) {
            throw new CastError("Expression value is not a number.");
        }
        return n;
    }
    BigInt(data) {
        if (isNullish(data))
            return null;
        return BigInt(data);
    }
};
PrimitiveMapper = __decorate([
    JsonMapper(String, Number, Boolean, BigInt)
], PrimitiveMapper);
export { PrimitiveMapper };