// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
/** A collection of HTTP errors and utilities.
 *
 * The export {@linkcode errors} contains an individual class that extends
 * {@linkcode HttpError} which makes handling HTTP errors in a structured way.
 *
 * The function {@linkcode createHttpError} provides a way to create instances
 * of errors in a factory pattern.
 *
 * The function {@linkcode isHttpError} is a type guard that will narrow a value
 * to an `HttpError` instance.
 *
 * ### Examples
 *
 * ```ts
 * import { errors, isHttpError } from "https://deno.land/std@$STD_VERSION/http/http_errors.ts";
 *
 * try {
 *   throw new errors.NotFound();
 * } catch (e) {
 *   if (isHttpError(e)) {
 *     const response = new Response(e.message, { status: e.status });
 *   } else {
 *     throw e;
 *   }
 * }
 * ```
 *
 * ```ts
 * import { createHttpError } from "https://deno.land/std@$STD_VERSION/http/http_errors.ts";
 * import { Status } from "https://deno.land/std@$STD_VERSION/http/http_status.ts";
 *
 * try {
 *   throw createHttpError(
 *     Status.BadRequest,
 *     "The request was bad.",
 *     { expose: false }
 *   );
 * } catch (e) {
 *   // handle errors
 * }
 * ```
 *
 * @module
 */ import { isClientErrorStatus, Status, STATUS_TEXT } from "./http_status.ts";
const ERROR_STATUS_MAP = {
    "BadRequest": 400,
    "Unauthorized": 401,
    "PaymentRequired": 402,
    "Forbidden": 403,
    "NotFound": 404,
    "MethodNotAllowed": 405,
    "NotAcceptable": 406,
    "ProxyAuthRequired": 407,
    "RequestTimeout": 408,
    "Conflict": 409,
    "Gone": 410,
    "LengthRequired": 411,
    "PreconditionFailed": 412,
    "RequestEntityTooLarge": 413,
    "RequestURITooLong": 414,
    "UnsupportedMediaType": 415,
    "RequestedRangeNotSatisfiable": 416,
    "ExpectationFailed": 417,
    "Teapot": 418,
    "MisdirectedRequest": 421,
    "UnprocessableEntity": 422,
    "Locked": 423,
    "FailedDependency": 424,
    "UpgradeRequired": 426,
    "PreconditionRequired": 428,
    "TooManyRequests": 429,
    "RequestHeaderFieldsTooLarge": 431,
    "UnavailableForLegalReasons": 451,
    "InternalServerError": 500,
    "NotImplemented": 501,
    "BadGateway": 502,
    "ServiceUnavailable": 503,
    "GatewayTimeout": 504,
    "HTTPVersionNotSupported": 505,
    "VariantAlsoNegotiates": 506,
    "InsufficientStorage": 507,
    "LoopDetected": 508,
    "NotExtended": 510,
    "NetworkAuthenticationRequired": 511
};
/** The base class that all derivative HTTP extend, providing a `status` and an
 * `expose` property. */ export class HttpError extends Error {
    #status = Status.InternalServerError;
    #expose;
    #headers;
    constructor(message = "Http Error", options){
        super(message, options);
        this.#expose = options?.expose === undefined ? isClientErrorStatus(this.status) : options.expose;
        if (options?.headers) {
            this.#headers = new Headers(options.headers);
        }
    }
    /** A flag to indicate if the internals of the error, like the stack, should
   * be exposed to a client, or if they are "private" and should not be leaked.
   * By default, all client errors are `true` and all server errors are
   * `false`. */ get expose() {
        return this.#expose;
    }
    /** The optional headers object that is set on the error. */ get headers() {
        return this.#headers;
    }
    /** The error status that is set on the error. */ get status() {
        return this.#status;
    }
}
function createHttpErrorConstructor(status) {
    const name = `${Status[status]}Error`;
    const ErrorCtor = class extends HttpError {
        constructor(message = STATUS_TEXT[status], options){
            super(message, options);
            Object.defineProperty(this, "name", {
                configurable: true,
                enumerable: false,
                value: name,
                writable: true
            });
        }
        get status() {
            return status;
        }
    };
    return ErrorCtor;
}
/** A map of HttpErrors that are unique instances for each HTTP error status
 * code.
 *
 * ### Example
 *
 * ```ts
 * import { errors } from "https://deno.land/std@$STD_VERSION/http/http_errors.ts";
 *
 * throw new errors.InternalServerError("Ooops!");
 * ```
 */ export const errors = {};
for (const [key, value] of Object.entries(ERROR_STATUS_MAP)){
    errors[key] = createHttpErrorConstructor(value);
}
/** Create an instance of an HttpError based on the status code provided. */ export function createHttpError(status = Status.InternalServerError, message, options) {
    return new errors[Status[status]](message, options);
}
/** A type guard that determines if the value is an HttpError or not. */ export function isHttpError(value) {
    return value instanceof HttpError;
}
//# sourceMappingURL=data:application/json;base64,[encoded data, 11084 characters]