simrail.pro_CZ/packages/backend/src/http/responseBuilder.ts

import { assert } from "node:console";

export interface IResponse<T>
{
    success: boolean;
    data: T;
    code: number;
}

export class BaseResponseBuilder<T>
{
    protected success: IResponse<T>["success"] = undefined!;
    protected data: IResponse<T>["data"] = undefined!;
    protected code: IResponse<T>["code"] = undefined!;


    public constructor(data?: Partial<IResponse<T>>)
    {
        if (!data)
        {
            return;
        }
        if ("success" in data)
        {
            this.success = data.success as IResponse<T>["success"];
        }
        if ("data" in data)
        {
            this.data = data.data as IResponse<T>["data"];
        }
        if ("code" in data)
        {
            this.code = data.code as IResponse<T>["code"];
        }
    }

    public setData(data: T)
    {
        this.data = data;
        return this;
    }

    public setCode(code: number)
    {
        this.code = code;
        return this;
    }

    public toJSON()
    {
        const { success, data, code } = this;
        assert(typeof (success) === "boolean", "expected success to be boolean");
        assert(typeof (code) === "number", "expected success to be number");

        return {
            success, data, code,
        };
    }
}


export class SuccessResponseBuilder<T> extends BaseResponseBuilder<T>
{
    public constructor(options?: IResponse<T>)
    {
        super(options);
        this.success = true;
    }
}


export class ErrorResponseBuilder<T> extends BaseResponseBuilder<T>
{
    public constructor(options?: IResponse<T>)
    {
        super(options);
        this.success = false;
    }
}