Types

export interface Adapter {
  name: string;
  adapt(builder: Builder): Promise<void>;
}

interface AdapterEntry {
  /**   * A string that uniquely identifies an HTTP service (e.g. serverless function) and is used for deduplication.   * For example, `/foo/a-[b]` and `/foo/[c]` are different routes, but would both   * be represented in a Netlify _redirects file as `/foo/:param`, so they share an ID   */  id: string;
  /**   * A function that compares the candidate route with the current route to determine   * if it should be treated as a fallback for the current route. For example, `/foo/[c]`   * is a fallback for `/foo/a-[b]`, and `/[...catchall]` is a fallback for all routes   */  filter: (route: RouteDefinition) => boolean;
  /**   * A function that is invoked once the entry has been created. This is where you   * should write the function to the filesystem and generate redirect manifests.   */  complete: (entry: {
    generateManifest: (opts: {
      relativePath: string;
      format?: 'esm' | 'cjs';
    }) => string;
  }) => void;
}

type Body =
  | JSONValue
  | Uint8Array
  | ReadableStream
  | import('stream').Readable;

export interface Builder {
  log: Logger;
  rimraf(dir: string): void;
  mkdirp(dir: string): void;

  appDir: string;
  trailingSlash: TrailingSlash;
  /**   * Create entry points that map to individual functions   * @param fn A function that groups a set of routes into an entry point   */  createEntries(
    fn: (route: RouteDefinition) => AdapterEntry
  ): void;

  generateManifest: (opts: {
    relativePath: string;
    format?: 'esm' | 'cjs';
  }) => string;

  getBuildDirectory(name: string): string;
  getClientDirectory(): string;
  getServerDirectory(): string;
  getStaticDirectory(): string;
  /**   * @param dest the destination folder to which files should be copied   * @returns an array of paths corresponding to the files that have been created by the copy   */  writeClient(dest: string): string[];
  /**   * @param dest the destination folder to which files should be copied   * @returns an array of paths corresponding to the files that have been created by the copy   */  writeServer(dest: string): string[];
  /**   * @param dest the destination folder to which files should be copied   * @returns an array of paths corresponding to the files that have been created by the copy   */  writeStatic(dest: string): string[];
  /**   * @param from the source file or folder   * @param to the destination file or folder   * @param opts.filter a function to determine whether a file or folder should be copied   * @param opts.replace a map of strings to replace   * @returns an array of paths corresponding to the files that have been created by the copy   */  copy(
    from: string,
    to: string,
    opts?: {
      filter?: (basename: string) => boolean;
      replace?: Record<string, string>;
    }
  ): string[];

  prerender(options: {
    all?: boolean;
    dest: string;
    fallback?: string;
  }): Promise<Prerendered>;
}

export interface Config {
  compilerOptions?: CompileOptions;
  extensions?: string[];
  kit?: {
    adapter?: Adapter;
    amp?: boolean;
    appDir?: string;
    browser?: {
      hydrate?: boolean;
      router?: boolean;
    };
    csp?: {
      mode?: 'hash' | 'nonce' | 'auto';
      directives?: CspDirectives;
    };
    files?: {
      assets?: string;
      hooks?: string;
      lib?: string;
      routes?: string;
      serviceWorker?: string;
      template?: string;
    };
    floc?: boolean;
    inlineStyleThreshold?: number;
    methodOverride?: {
      parameter?: string;
      allowed?: string[];
    };
    package?: {
      dir?: string;
      emitTypes?: boolean;
      exports?(filepath: string): boolean;
      files?(filepath: string): boolean;
    };
    paths?: {
      assets?: string;
      base?: string;
    };
    prerender?: {
      concurrency?: number;
      crawl?: boolean;
      enabled?: boolean;
      entries?: string[];
      onError?: PrerenderOnErrorValue;
    };
    routes?: (filepath: string) => boolean;
    serviceWorker?: {
      register?: boolean;
      files?: (filepath: string) => boolean;
    };
    trailingSlash?: TrailingSlash;
    version?: {
      name?: string;
      pollInterval?: number;
    };
    vite?:
      | import('vite').UserConfig
      | (() => MaybePromise<import('vite').UserConfig>);
  };
  preprocess?: any;
}

export namespace Csp {
  type ActionSource = 'strict-dynamic' | 'report-sample';
  type BaseSource =
    | 'self'
    | 'unsafe-eval'
    | 'unsafe-hashes'
    | 'unsafe-inline'
    | 'none';
  type CryptoSource = `${
    | 'nonce'
    | 'sha256'
    | 'sha384'
    | 'sha512'}-${string}`;
  type FrameSource =
    | HostSource
    | SchemeSource
    | 'self'
    | 'none';
  type HostNameScheme = `${string}.${string}` | 'localhost';
  type HostSource =
    `${HostProtocolSchemes}${HostNameScheme}${PortScheme}`;
  type HostProtocolSchemes = `${string}://` | '';
  type HttpDelineator = '/' | '?' | '#' | '\\';
  type PortScheme = `:${number}` | '' | ':*';
  type SchemeSource =
    | 'http:'
    | 'https:'
    | 'data:'
    | 'mediastream:'
    | 'blob:'
    | 'filesystem:';
  type Source =
    | HostSource
    | SchemeSource
    | CryptoSource
    | BaseSource;
  type Sources = Source[];
  type UriPath = `${HttpDelineator}${string}`;
}

export type CspDirectives = {
  'child-src'?: Csp.Sources;
  'default-src'?: Array<Csp.Source | Csp.ActionSource>;
  'frame-src'?: Csp.Sources;
  'worker-src'?: Csp.Sources;
  'connect-src'?: Csp.Sources;
  'font-src'?: Csp.Sources;
  'img-src'?: Csp.Sources;
  'manifest-src'?: Csp.Sources;
  'media-src'?: Csp.Sources;
  'object-src'?: Csp.Sources;
  'prefetch-src'?: Csp.Sources;
  'script-src'?: Array<Csp.Source | Csp.ActionSource>;
  'script-src-elem'?: Csp.Sources;
  'script-src-attr'?: Csp.Sources;
  'style-src'?: Array<Csp.Source | Csp.ActionSource>;
  'style-src-elem'?: Csp.Sources;
  'style-src-attr'?: Csp.Sources;
  'base-uri'?: Array<Csp.Source | Csp.ActionSource>;
  sandbox?: Array<
    | 'allow-downloads-without-user-activation'
    | 'allow-forms'
    | 'allow-modals'
    | 'allow-orientation-lock'
    | 'allow-pointer-lock'
    | 'allow-popups'
    | 'allow-popups-to-escape-sandbox'
    | 'allow-presentation'
    | 'allow-same-origin'
    | 'allow-scripts'
    | 'allow-storage-access-by-user-activation'
    | 'allow-top-navigation'
    | 'allow-top-navigation-by-user-activation'
  >;
  'form-action'?: Array<Csp.Source | Csp.ActionSource>;
  'frame-ancestors'?: Array<
    Csp.HostSource | Csp.SchemeSource | Csp.FrameSource
  >;
  'navigate-to'?: Array<Csp.Source | Csp.ActionSource>;
  'report-uri'?: Csp.UriPath[];
  'report-to'?: string[];

  'require-trusted-types-for'?: Array<'script'>;
  'trusted-types'?: Array<
    'none' | 'allow-duplicates' | '*' | string
  >;
  'upgrade-insecure-requests'?: boolean;
  /** @deprecated */  'require-sri-for'?: Array<
    'script' | 'style' | 'script style'
  >;
  /** @deprecated */  'block-all-mixed-content'?: boolean;
  /** @deprecated */  'plugin-types'?: Array<`${string}/${string}` | 'none'>;
  /** @deprecated */  referrer?: Array<
    | 'no-referrer'
    | 'no-referrer-when-downgrade'
    | 'origin'
    | 'origin-when-cross-origin'
    | 'same-origin'
    | 'strict-origin'
    | 'strict-origin-when-cross-origin'
    | 'unsafe-url'
    | 'none'
  >;
};

type Either<T, U> = Only<T, U> | Only<U, T>;

export interface EndpointOutput<
  Output extends Body = Body
> {
  status?: number;
  headers?: Headers | Partial<ResponseHeaders>;
  body?: Output;
}

export interface ErrorLoad<
  Params = Record<string, string>,
  Props = Record<string, any>
> {
  (input: ErrorLoadInput<Params>): MaybePromise<
    LoadOutput<Props>
  >;
}

export interface ErrorLoadInput<
  Params = Record<string, string>
> extends LoadInput<Params> {
  status?: number;
  error?: Error;
}

export interface ExternalFetch {
  (req: Request): Promise<Response>;
}

interface Fallthrough {
  fallthrough: true;
}

export interface GetSession {
  (event: RequestEvent): MaybePromise<App.Session>;
}

export interface Handle {
  (input: {
    event: RequestEvent;
    resolve(
      event: RequestEvent,
      opts?: ResolveOptions
    ): MaybePromise<Response>;
  }): MaybePromise<Response>;
}

export interface HandleError {
  (input: {
    error: Error & { frame?: string };
    event: RequestEvent;
  }): void;
}

type HttpMethod =
  | 'get'
  | 'head'
  | 'post'
  | 'put'
  | 'delete'
  | 'patch';

type JSONObject = { [key: string]: JSONValue };

type JSONValue =
  | string
  | number
  | boolean
  | null
  | ToJSON
  | JSONValue[]
  | JSONObject;

export interface Load<
  Params = Record<string, string>,
  Props = Record<string, any>
> {
  (input: LoadInput<Params>): MaybePromise<
    Either<Fallthrough, LoadOutput<Props>>
  >;
}

export interface LoadInput<
  Params = Record<string, string>
> {
  url: URL;
  params: Params;
  props: Record<string, any>;
  fetch(
    info: RequestInfo,
    init?: RequestInit
  ): Promise<Response>;
  session: App.Session;
  stuff: Partial<App.Stuff>;
}

export interface LoadOutput<Props = Record<string, any>> {
  status?: number;
  error?: string | Error;
  redirect?: string;
  props?: Props;
  stuff?: Partial<App.Stuff>;
  maxage?: number;
}

interface Logger {
  (msg: string): void;
  success(msg: string): void;
  error(msg: string): void;
  warn(msg: string): void;
  minor(msg: string): void;
  info(msg: string): void;
}

type MaybePromise<T> = T | Promise<T>;

export interface Navigation {
  from: URL;
  to: URL;
}

type Only<T, U> = { [P in keyof T]: T[P] } & {
  [P in Exclude<keyof U, keyof T>]?: never;
};

export interface Page<
  Params extends Record<string, string> = Record<
    string,
    string
  >
> {
  url: URL;
  params: Params;
  stuff: App.Stuff;
  status: number;
  error: Error | null;
}

export interface PrerenderErrorHandler {
  (details: {
    status: number;
    path: string;
    referrer: string | null;
    referenceType: 'linked' | 'fetched';
  }): void;
}

type PrerenderOnErrorValue =
  | 'fail'
  | 'continue'
  | PrerenderErrorHandler;

export interface Prerendered {
  pages: Map<
    string,
    {
      /** The location of the .html file relative to the output directory */      file: string;
    }
  >;
  assets: Map<
    string,
    {
      /** The MIME type of the asset */      type: string;
    }
  >;
  redirects: Map<
    string,
    {
      status: number;
      location: string;
    }
  >;
  /** An array of prerendered paths (without trailing slashes, regardless of the trailingSlash config) */  paths: string[];
}

export interface RequestEvent<
  Params = Record<string, string>
> {
  request: Request;
  url: URL;
  params: Params;
  locals: App.Locals;
  platform: Readonly<App.Platform>;
}

export interface RequestHandler<
  Params = Record<string, string>,
  Output extends Body = Body
> {
  (event: RequestEvent<Params>): MaybePromise<
    Either<
      Output extends Response
        ? Response
        : EndpointOutput<Output>,
      Fallthrough
    >
  >;
}

export interface RequestOptions {
  platform?: App.Platform;
}

export type ResolveOptions = {
  ssr?: boolean;
  transformPage?: ({
    html
  }: {
    html: string;
  }) => MaybePromise<string>;
};

type ResponseHeaders = Record<
  string,
  string | number | string[]
>;

interface RouteDefinition {
  type: 'page' | 'endpoint';
  pattern: RegExp;
  segments: RouteSegment[];
  methods: HttpMethod[];
}

interface RouteSegment {
  content: string;
  dynamic: boolean;
  rest: boolean;
}

export interface SSRManifest {
  appDir: string;
  assets: Set<string>;
}

export class Server {
  constructor(manifest: SSRManifest);
  respond(
    request: Request,
    options?: RequestOptions
  ): Promise<Response>;
}

type ToJSON = {
  toJSON(...args: any[]): Exclude<JSONValue, ToJSON>;
};

type TrailingSlash = 'never' | 'always' | 'ignore';

/// <reference types="@sveltejs/kit" />

declare namespace App {
  interface Locals {}

  interface Platform {}

  interface Session {}

  interface Stuff {}
}