denoland-deno/ext/url/01_urlpattern.js

// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.

// @ts-check
/// <reference path="../../core/internal.d.ts" />
/// <reference path="../../core/lib.deno_core.d.ts" />
/// <reference path="../webidl/internal.d.ts" />
/// <reference path="./internal.d.ts" />
/// <reference path="./lib.deno_url.d.ts" />

const core = globalThis.Deno.core;
const ops = core.ops;
import * as webidl from "ext:deno_webidl/00_webidl.js";
const primordials = globalThis.__bootstrap.primordials;
const {
  ArrayPrototypePop,
  RegExpPrototypeExec,
  RegExpPrototypeTest,
  SafeRegExp,
  Symbol,
  SymbolFor,
  TypeError,
} = primordials;

const EMPTY_MATCH = [""];
const _components = Symbol("components");

/**
 * @typedef Components
 * @property {Component} protocol
 * @property {Component} username
 * @property {Component} password
 * @property {Component} hostname
 * @property {Component} port
 * @property {Component} pathname
 * @property {Component} search
 * @property {Component} hash
 */
const COMPONENTS_KEYS = [
  "protocol",
  "username",
  "password",
  "hostname",
  "port",
  "pathname",
  "search",
  "hash",
];

/**
 * @typedef Component
 * @property {string} patternString
 * @property {RegExp} regexp
 * @property {string[]} groupNameList
 */

class URLPattern {
  /** @type {Components} */
  [_components];

  /**
   * @param {URLPatternInput} input
   * @param {string} [baseURL]
   */
  constructor(input, baseURL = undefined) {
    this[webidl.brand] = webidl.brand;
    const prefix = "Failed to construct 'URLPattern'";
    webidl.requiredArguments(arguments.length, 1, prefix);
    input = webidl.converters.URLPatternInput(input, prefix, "Argument 1");
    if (baseURL !== undefined) {
      baseURL = webidl.converters.USVString(baseURL, prefix, "Argument 2");
    }

    const components = ops.op_urlpattern_parse(input, baseURL);

    for (let i = 0; i < COMPONENTS_KEYS.length; ++i) {
      const key = COMPONENTS_KEYS[i];
      try {
        components[key].regexp = new SafeRegExp(
          components[key].regexpString,
          "u",
        );
        // used for fast path
        components[key].matchOnEmptyInput =
          components[key].regexpString === "^$";
      } catch (e) {
        throw new TypeError(`${prefix}: ${key} is invalid; ${e.message}`);
      }
    }
    this[_components] = components;
  }

  get protocol() {
    webidl.assertBranded(this, URLPatternPrototype);
    return this[_components].protocol.patternString;
  }

  get username() {
    webidl.assertBranded(this, URLPatternPrototype);
    return this[_components].username.patternString;
  }

  get password() {
    webidl.assertBranded(this, URLPatternPrototype);
    return this[_components].password.patternString;
  }

  get hostname() {
    webidl.assertBranded(this, URLPatternPrototype);
    return this[_components].hostname.patternString;
  }

  get port() {
    webidl.assertBranded(this, URLPatternPrototype);
    return this[_components].port.patternString;
  }

  get pathname() {
    webidl.assertBranded(this, URLPatternPrototype);
    return this[_components].pathname.patternString;
  }

  get search() {
    webidl.assertBranded(this, URLPatternPrototype);
    return this[_components].search.patternString;
  }

  get hash() {
    webidl.assertBranded(this, URLPatternPrototype);
    return this[_components].hash.patternString;
  }

  /**
   * @param {URLPatternInput} input
   * @param {string} [baseURL]
   * @returns {boolean}
   */
  test(input, baseURL = undefined) {
    webidl.assertBranded(this, URLPatternPrototype);
    const prefix = "Failed to execute 'test' on 'URLPattern'";
    webidl.requiredArguments(arguments.length, 1, prefix);
    input = webidl.converters.URLPatternInput(input, prefix, "Argument 1");
    if (baseURL !== undefined) {
      baseURL = webidl.converters.USVString(baseURL, prefix, "Argument 2");
    }

    const res = ops.op_urlpattern_process_match_input(
      input,
      baseURL,
    );
    if (res === null) {
      return false;
    }

    const values = res[0];

    for (let i = 0; i < COMPONENTS_KEYS.length; ++i) {
      const key = COMPONENTS_KEYS[i];
      if (!RegExpPrototypeTest(this[_components][key].regexp, values[key])) {
        return false;
      }
    }

    return true;
  }

  /**
   * @param {URLPatternInput} input
   * @param {string} [baseURL]
   * @returns {URLPatternResult | null}
   */
  exec(input, baseURL = undefined) {
    webidl.assertBranded(this, URLPatternPrototype);
    const prefix = "Failed to execute 'exec' on 'URLPattern'";
    webidl.requiredArguments(arguments.length, 1, prefix);
    input = webidl.converters.URLPatternInput(input, prefix, "Argument 1");
    if (baseURL !== undefined) {
      baseURL = webidl.converters.USVString(baseURL, prefix, "Argument 2");
    }

    const res = ops.op_urlpattern_process_match_input(
      input,
      baseURL,
    );
    if (res === null) {
      return null;
    }

    const { 0: values, 1: inputs } = res;
    if (inputs[1] === null) {
      ArrayPrototypePop(inputs);
    }

    /** @type {URLPatternResult} */
    const result = { inputs };

    for (let i = 0; i < COMPONENTS_KEYS.length; ++i) {
      const key = COMPONENTS_KEYS[i];
      /** @type {Component} */
      const component = this[_components][key];
      const input = values[key];

      const match = component.matchOnEmptyInput && input === ""
        ? EMPTY_MATCH // fast path
        : RegExpPrototypeExec(component.regexp, input);

      if (match === null) {
        return null;
      }

      const groups = {};
      const groupList = component.groupNameList;
      for (let i = 0; i < groupList.length; ++i) {
        groups[groupList[i]] = match[i + 1] ?? "";
      }

      result[key] = {
        input,
        groups,
      };
    }

    return result;
  }

  [SymbolFor("Deno.customInspect")](inspect) {
    return `URLPattern ${
      inspect({
        protocol: this.protocol,
        username: this.username,
        password: this.password,
        hostname: this.hostname,
        port: this.port,
        pathname: this.pathname,
        search: this.search,
        hash: this.hash,
      })
    }`;
  }
}

webidl.configureInterface(URLPattern);
const URLPatternPrototype = URLPattern.prototype;

webidl.converters.URLPatternInit = webidl
  .createDictionaryConverter("URLPatternInit", [
    { key: "protocol", converter: webidl.converters.USVString },
    { key: "username", converter: webidl.converters.USVString },
    { key: "password", converter: webidl.converters.USVString },
    { key: "hostname", converter: webidl.converters.USVString },
    { key: "port", converter: webidl.converters.USVString },
    { key: "pathname", converter: webidl.converters.USVString },
    { key: "search", converter: webidl.converters.USVString },
    { key: "hash", converter: webidl.converters.USVString },
    { key: "baseURL", converter: webidl.converters.USVString },
  ]);

webidl.converters["URLPatternInput"] = (V, prefix, context, opts) => {
  // Union for (URLPatternInit or USVString)
  if (typeof V == "object") {
    return webidl.converters.URLPatternInit(V, prefix, context, opts);
  }
  return webidl.converters.USVString(V, prefix, context, opts);
};

export { URLPattern };