@baptistecdr/aria2/dist/esm-browser/bundle.js

Library for aria2, "The next generation download utility."

var domain;

// This constructor is used to store event handlers. Instantiating this is
// faster than explicitly calling `Object.create(null)` to get a "clean" empty
// object (tested with v8 v4.9).
function EventHandlers() {}
EventHandlers.prototype = Object.create(null);

function EventEmitter() {
  EventEmitter.init.call(this);
}

// nodejs oddity
// require('events') === require('events').EventEmitter
EventEmitter.EventEmitter = EventEmitter;

EventEmitter.usingDomains = false;

EventEmitter.prototype.domain = undefined;
EventEmitter.prototype._events = undefined;
EventEmitter.prototype._maxListeners = undefined;

// By default EventEmitters will print a warning if more than 10 listeners are
// added to it. This is a useful default which helps finding memory leaks.
EventEmitter.defaultMaxListeners = 10;

EventEmitter.init = function() {
  this.domain = null;
  if (EventEmitter.usingDomains) {
    // if there is an active domain, then attach to it.
    if (domain.active) ;
  }

  if (!this._events || this._events === Object.getPrototypeOf(this)._events) {
    this._events = new EventHandlers();
    this._eventsCount = 0;
  }

  this._maxListeners = this._maxListeners || undefined;
};

// Obviously not all Emitters should be limited to 10. This function allows
// that to be increased. Set to zero for unlimited.
EventEmitter.prototype.setMaxListeners = function setMaxListeners(n) {
  if (typeof n !== 'number' || n < 0 || isNaN(n))
    throw new TypeError('"n" argument must be a positive number');
  this._maxListeners = n;
  return this;
};

function $getMaxListeners(that) {
  if (that._maxListeners === undefined)
    return EventEmitter.defaultMaxListeners;
  return that._maxListeners;
}

EventEmitter.prototype.getMaxListeners = function getMaxListeners() {
  return $getMaxListeners(this);
};

// These standalone emit* functions are used to optimize calling of event
// handlers for fast cases because emit() itself often has a variable number of
// arguments and can be deoptimized because of that. These functions always have
// the same number of arguments and thus do not get deoptimized, so the code
// inside them can execute faster.
function emitNone(handler, isFn, self) {
  if (isFn)
    handler.call(self);
  else {
    var len = handler.length;
    var listeners = arrayClone(handler, len);
    for (var i = 0; i < len; ++i)
      listeners[i].call(self);
  }
}
function emitOne(handler, isFn, self, arg1) {
  if (isFn)
    handler.call(self, arg1);
  else {
    var len = handler.length;
    var listeners = arrayClone(handler, len);
    for (var i = 0; i < len; ++i)
      listeners[i].call(self, arg1);
  }
}
function emitTwo(handler, isFn, self, arg1, arg2) {
  if (isFn)
    handler.call(self, arg1, arg2);
  else {
    var len = handler.length;
    var listeners = arrayClone(handler, len);
    for (var i = 0; i < len; ++i)
      listeners[i].call(self, arg1, arg2);
  }
}
function emitThree(handler, isFn, self, arg1, arg2, arg3) {
  if (isFn)
    handler.call(self, arg1, arg2, arg3);
  else {
    var len = handler.length;
    var listeners = arrayClone(handler, len);
    for (var i = 0; i < len; ++i)
      listeners[i].call(self, arg1, arg2, arg3);
  }
}

function emitMany(handler, isFn, self, args) {
  if (isFn)
    handler.apply(self, args);
  else {
    var len = handler.length;
    var listeners = arrayClone(handler, len);
    for (var i = 0; i < len; ++i)
      listeners[i].apply(self, args);
  }
}

EventEmitter.prototype.emit = function emit(type) {
  var er, handler, len, args, i, events, domain;
  var doError = (type === 'error');

  events = this._events;
  if (events)
    doError = (doError && events.error == null);
  else if (!doError)
    return false;

  domain = this.domain;

  // If there is no 'error' event listener then throw.
  if (doError) {
    er = arguments[1];
    if (domain) {
      if (!er)
        er = new Error('Uncaught, unspecified "error" event');
      er.domainEmitter = this;
      er.domain = domain;
      er.domainThrown = false;
      domain.emit('error', er);
    } else if (er instanceof Error) {
      throw er; // Unhandled 'error' event
    } else {
      // At least give some kind of context to the user
      var err = new Error('Uncaught, unspecified "error" event. (' + er + ')');
      err.context = er;
      throw err;
    }
    return false;
  }

  handler = events[type];

  if (!handler)
    return false;

  var isFn = typeof handler === 'function';
  len = arguments.length;
  switch (len) {
    // fast cases
    case 1:
      emitNone(handler, isFn, this);
      break;
    case 2:
      emitOne(handler, isFn, this, arguments[1]);
      break;
    case 3:
      emitTwo(handler, isFn, this, arguments[1], arguments[2]);
      break;
    case 4:
      emitThree(handler, isFn, this, arguments[1], arguments[2], arguments[3]);
      break;
    // slower
    default:
      args = new Array(len - 1);
      for (i = 1; i < len; i++)
        args[i - 1] = arguments[i];
      emitMany(handler, isFn, this, args);
  }

  return true;
};

function _addListener(target, type, listener, prepend) {
  var m;
  var events;
  var existing;

  if (typeof listener !== 'function')
    throw new TypeError('"listener" argument must be a function');

  events = target._events;
  if (!events) {
    events = target._events = new EventHandlers();
    target._eventsCount = 0;
  } else {
    // To avoid recursion in the case that type === "newListener"! Before
    // adding it to the listeners, first emit "newListener".
    if (events.newListener) {
      target.emit('newListener', type,
                  listener.listener ? listener.listener : listener);

      // Re-assign `events` because a newListener handler could have caused the
      // this._events to be assigned to a new object
      events = target._events;
    }
    existing = events[type];
  }

  if (!existing) {
    // Optimize the case of one listener. Don't need the extra array object.
    existing = events[type] = listener;
    ++target._eventsCount;
  } else {
    if (typeof existing === 'function') {
      // Adding the second element, need to change to array.
      existing = events[type] = prepend ? [listener, existing] :
                                          [existing, listener];
    } else {
      // If we've already got an array, just append.
      if (prepend) {
        existing.unshift(listener);
      } else {
        existing.push(listener);
      }
    }

    // Check for listener leak
    if (!existing.warned) {
      m = $getMaxListeners(target);
      if (m && m > 0 && existing.length > m) {
        existing.warned = true;
        var w = new Error('Possible EventEmitter memory leak detected. ' +
                            existing.length + ' ' + type + ' listeners added. ' +
                            'Use emitter.setMaxListeners() to increase limit');
        w.name = 'MaxListenersExceededWarning';
        w.emitter = target;
        w.type = type;
        w.count = existing.length;
        emitWarning(w);
      }
    }
  }

  return target;
}
function emitWarning(e) {
  typeof console.warn === 'function' ? console.warn(e) : console.log(e);
}
EventEmitter.prototype.addListener = function addListener(type, listener) {
  return _addListener(this, type, listener, false);
};

EventEmitter.prototype.on = EventEmitter.prototype.addListener;

EventEmitter.prototype.prependListener =
    function prependListener(type, listener) {
      return _addListener(this, type, listener, true);
    };

function _onceWrap(target, type, listener) {
  var fired = false;
  function g() {
    target.removeListener(type, g);
    if (!fired) {
      fired = true;
      listener.apply(target, arguments);
    }
  }
  g.listener = listener;
  return g;
}

EventEmitter.prototype.once = function once(type, listener) {
  if (typeof listener !== 'function')
    throw new TypeError('"listener" argument must be a function');
  this.on(type, _onceWrap(this, type, listener));
  return this;
};

EventEmitter.prototype.prependOnceListener =
    function prependOnceListener(type, listener) {
      if (typeof listener !== 'function')
        throw new TypeError('"listener" argument must be a function');
      this.prependListener(type, _onceWrap(this, type, listener));
      return this;
    };

// emits a 'removeListener' event iff the listener was removed
EventEmitter.prototype.removeListener =
    function removeListener(type, listener) {
      var list, events, position, i, originalListener;

      if (typeof listener !== 'function')
        throw new TypeError('"listener" argument must be a function');

      events = this._events;
      if (!events)
        return this;

      list = events[type];
      if (!list)
        return this;

      if (list === listener || (list.listener && list.listener === listener)) {
        if (--this._eventsCount === 0)
          this._events = new EventHandlers();
        else {
          delete events[type];
          if (events.removeListener)
            this.emit('removeListener', type, list.listener || listener);
        }
      } else if (typeof list !== 'function') {
        position = -1;

        for (i = list.length; i-- > 0;) {
          if (list[i] === listener ||
              (list[i].listener && list[i].listener === listener)) {
            originalListener = list[i].listener;
            position = i;
            break;
          }
        }

        if (position < 0)
          return this;

        if (list.length === 1) {
          list[0] = undefined;
          if (--this._eventsCount === 0) {
            this._events = new EventHandlers();
            return this;
          } else {
            delete events[type];
          }
        } else {
          spliceOne(list, position);
        }

        if (events.removeListener)
          this.emit('removeListener', type, originalListener || listener);
      }

      return this;
    };
    
// Alias for removeListener added in NodeJS 10.0
// https://nodejs.org/api/events.html#events_emitter_off_eventname_listener
EventEmitter.prototype.off = function(type, listener){
    return this.removeListener(type, listener);
};

EventEmitter.prototype.removeAllListeners =
    function removeAllListeners(type) {
      var listeners, events;

      events = this._events;
      if (!events)
        return this;

      // not listening for removeListener, no need to emit
      if (!events.removeListener) {
        if (arguments.length === 0) {
          this._events = new EventHandlers();
          this._eventsCount = 0;
        } else if (events[type]) {
          if (--this._eventsCount === 0)
            this._events = new EventHandlers();
          else
            delete events[type];
        }
        return this;
      }

      // emit removeListener for all listeners on all events
      if (arguments.length === 0) {
        var keys = Object.keys(events);
        for (var i = 0, key; i < keys.length; ++i) {
          key = keys[i];
          if (key === 'removeListener') continue;
          this.removeAllListeners(key);
        }
        this.removeAllListeners('removeListener');
        this._events = new EventHandlers();
        this._eventsCount = 0;
        return this;
      }

      listeners = events[type];

      if (typeof listeners === 'function') {
        this.removeListener(type, listeners);
      } else if (listeners) {
        // LIFO order
        do {
          this.removeListener(type, listeners[listeners.length - 1]);
        } while (listeners[0]);
      }

      return this;
    };

EventEmitter.prototype.listeners = function listeners(type) {
  var evlistener;
  var ret;
  var events = this._events;

  if (!events)
    ret = [];
  else {
    evlistener = events[type];
    if (!evlistener)
      ret = [];
    else if (typeof evlistener === 'function')
      ret = [evlistener.listener || evlistener];
    else
      ret = unwrapListeners(evlistener);
  }

  return ret;
};

EventEmitter.listenerCount = function(emitter, type) {
  if (typeof emitter.listenerCount === 'function') {
    return emitter.listenerCount(type);
  } else {
    return listenerCount.call(emitter, type);
  }
};

EventEmitter.prototype.listenerCount = listenerCount;
function listenerCount(type) {
  var events = this._events;

  if (events) {
    var evlistener = events[type];

    if (typeof evlistener === 'function') {
      return 1;
    } else if (evlistener) {
      return evlistener.length;
    }
  }

  return 0;
}

EventEmitter.prototype.eventNames = function eventNames() {
  return this._eventsCount > 0 ? Reflect.ownKeys(this._events) : [];
};

// About 1.5x faster than the two-arg version of Array#splice().
function spliceOne(list, index) {
  for (var i = index, k = i + 1, n = list.length; k < n; i += 1, k += 1)
    list[i] = list[k];
  list.pop();
}

function arrayClone(arr, i) {
  var copy = new Array(i);
  while (i--)
    copy[i] = arr[i];
  return copy;
}

function unwrapListeners(arr) {
  var ret = new Array(arr.length);
  for (var i = 0; i < ret.length; ++i) {
    ret[i] = arr[i].listener || arr[i];
  }
  return ret;
}

function Deferred() {
  this.promise = new Promise((resolve, reject) => {
    this.resolve = resolve;
    this.reject = reject;
  });
}

class JSONRPCError extends Error {
  constructor({ message, code, data }) {
    super(message);
    this.code = code;
    if (data) this.data = data;
    this.name = this.constructor.name;
  }
}

function promiseEvent(target, event) {
  return new Promise((resolve, reject) => {
    function cleanup() {
      target.removeListener(event, onEvent);
      target.removeListener("error", onError);
    }
    function onEvent(data) {
      resolve(data);
      cleanup();
    }
    function onError(err) {
      reject(err);
      cleanup();
    }
    target.addListener(event, onEvent);
    target.addListener("error", onError);
  });
}

// biome-ignore lint/style/useNodejsImportProtocol: nodePolyfills cannot polyfill if the module is imported with the node: protocol

class JSONRPCClient extends EventEmitter {
  constructor(options) {
    super();
    this.deferreds = Object.create(null);
    this.lastId = 0;

    Object.assign(this, this.constructor.defaultOptions, options);
  }

  id() {
    return this.lastId++;
  }

  url(protocol) {
    return `${protocol + (this.secure ? "s" : "")}://${this.host}:${this.port}${this.path}`;
  }

  websocket(message) {
    return new Promise((resolve, reject) => {
      const cb = (err) => {
        if (err) reject(err);
        else resolve();
      };
      this.socket.send(JSON.stringify(message), cb);
      if (globalThis.WebSocket && this.socket instanceof globalThis.WebSocket) cb();
    });
  }

  async http(message) {
    const response = await this.fetch(this.url("http"), {
      method: "POST",
      body: JSON.stringify(message),
      headers: {
        Accept: "application/json",
        "Content-Type": "application/json",
      },
    });

    response
      .json()
      .then((msg) => this._onmessage(msg))
      .catch((err) => {
        this.emit("error", err);
      });

    return response;
  }

  _buildMessage(method, params) {
    if (typeof method !== "string") {
      throw new TypeError(`${method} is not a string`);
    }

    const message = {
      method,
      "json-rpc": "2.0",
      id: this.id(),
    };

    if (params) Object.assign(message, { params });
    return message;
  }

  async batch(calls) {

    const message = calls.map(([method, params]) => {
      return this._buildMessage(method, params);
    });

    await this._send(message);

    return message.map(({ id }) => {
      this.deferreds[id] = new Deferred();
      const { promise } = this.deferreds[id];
      return promise;
    });
  }

  async call(method, parameters) {
    const message = this._buildMessage(method, parameters);
    await this._send(message);

    this.deferreds[message.id] = new Deferred();
    const { promise } = this.deferreds[message.id];

    return promise;
  }

  async _send(message) {
    this.emit("output", message);

    const { socket } = this;
    return socket && socket.readyState === 1 ? this.websocket(message) : this.http(message);
  }

  _onresponse({ id, error, result }) {
    const deferred = this.deferreds[id];
    if (!deferred) return;
    if (error) deferred.reject(new JSONRPCError(error));
    else deferred.resolve(result);
    delete this.deferreds[id];
  }

  _onrequest({ method, params }) {
    return this.onrequest(method, params);
  }

  _onnotification({ method, params }) {
    this.emit(method, params);
  }

  _onmessage(message) {
    this.emit("input", message);

    if (Array.isArray(message)) {
      for (const object of message) {
        this._onobject(object);
      }
    } else {
      this._onobject(message);
    }
  }

  _onobject(message) {
    if (message.method === undefined) this._onresponse(message);
    else if (message.id === undefined) this._onnotification(message);
    else this._onrequest(message);
  }

  async open() {
    this.socket = new this.WebSocket(this.url("ws"));
    const socket = this.socket;

    socket.onclose = (...args) => {
      this.emit("close", ...args);
    };
    socket.onmessage = (event) => {
      let message;
      try {
        message = JSON.parse(event.data);
      } catch (err) {
        this.emit("error", err);
        return;
      }
      this._onmessage(message);
    };
    socket.onopen = (...args) => {
      this.emit("open", ...args);
    };
    socket.onerror = (...args) => {
      this.emit("error", ...args);
    };

    return promiseEvent(this, "open");
  }

  async close() {
    const { socket } = this;
    socket.close();
    return promiseEvent(this, "close");
  }
}

JSONRPCClient.defaultOptions = {
  secure: false,
  host: "localhost",
  port: 80,
  secret: "",
  path: "/jsonrpc",
  WebSocket: globalThis.WebSocket,
  fetch: globalThis.fetch.bind(globalThis),
};

function prefix(str) {
  let prefixedStr = str;
  if (!str.startsWith("system.") && !str.startsWith("aria2.")) {
    prefixedStr = `aria2.${str}`;
  }
  return prefixedStr;
}

function unprefix(str) {
  const suffix = str.split("aria2.")[1];
  return suffix || str;
}

class Aria2 extends JSONRPCClient {
  addSecret(parameters) {
    let params = this.secret ? [`token:${this.secret}`] : [];
    if (Array.isArray(parameters)) {
      params = params.concat(parameters);
    }
    return params;
  }

  _onnotification(notification) {
    const { method, params } = notification;
    const event = unprefix(method);
    if (event !== method) this.emit(event, params);
    return super._onnotification(notification);
  }

  async call(method, ...params) {
    return super.call(prefix(method), this.addSecret(params));
  }

  async multicall(calls) {
    const multi = [
      calls.map(([method, ...params]) => {
        return { methodName: prefix(method), params: this.addSecret(params) };
      }),
    ];
    return super.call("system.multicall", multi);
  }

  async batch(calls) {
    return super.batch(calls.map(([method, ...params]) => [prefix(method), this.addSecret(params)]));
  }

  async listNotifications() {
    const events = await this.call("system.listNotifications");
    return events.map((event) => unprefix(event));
  }

  async listMethods() {
    const methods = await this.call("system.listMethods");
    return methods.map((method) => unprefix(method));
  }
}

Object.assign(Aria2, { prefix, unprefix });

Aria2.defaultOptions = Object.assign({}, JSONRPCClient.defaultOptions, {
  secure: false,
  host: "localhost",
  port: 6800,
  secret: "",
  path: "/jsonrpc",
});

export { Aria2 as default };