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import { NextFunction, Request, Response } from "express";
import { HTTPError } from "lambert-server";
import { ApiError, FieldError } from "@fosscord/util";
const EntityNotFoundErrorRegex = /"(\w+)"/;
export function ErrorHandler(error: Error, req: Request, res: Response, next: NextFunction) {
if (!error) return next();
try {
let code = 400;
let httpcode = code;
let message = error?.toString();
let errors = undefined;
if (error instanceof HTTPError && error.code) code = httpcode = error.code;
else if (error instanceof ApiError) {
code = error.code;
message = error.message;
httpcode = error.httpStatus;
} else if (error.name === "EntityNotFoundError") {
message = `${error.message.match(EntityNotFoundErrorRegex)?.[1] || "Item"} could not be found`;
code = httpcode = 404;
} else if (error instanceof FieldError) {
code = Number(error.code);
message = error.message;
errors = error.errors;
} else {
console.error(`[Error] ${code} ${req.url}\n`, errors || error, "\nbody:", req.body);
if (req.server?.options?.production) {
// don't expose internal errors to the user, instead human errors should be thrown as HTTPError
message = "Internal Server Error";
}
code = httpcode = 500;
}
if (httpcode > 511) httpcode = 400;
res.status(httpcode).json({ code: code, message, errors });
} catch (error) {
console.error(`[Internal Server Error] 500`, error);
return res.status(500).json({ code: 500, message: "Internal Server Error" });
}
}
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