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Collects messages on a chat. Will automatically stop if the chat ('chatDelete') is deleted.

Hierarchy

Index

Constructors

constructor

  • new MessageCollector(sessionId: string, instanceId: string, chat: ChatId, filter: (...args: any[]) => boolean | Promise<boolean>, options?: CollectorOptions, openWaEventEmitter: EventEmitter2): MessageCollector
  • emits

    MessageCollector#Message

    Parameters

    • sessionId: string

      The id of the session

    • instanceId: string

      The id of the current instance of the session (see: client.getInstanceId)

    • chat: ChatId
    • filter: (...args: any[]) => boolean | Promise<boolean>

      The filter to be applied to this collector

        • (...args: any[]): boolean | Promise<boolean>
        • Parameters

          • Rest ...args: any[]

          Returns boolean | Promise<boolean>

    • options: CollectorOptions = {}

      The options to be applied to this collector

    • openWaEventEmitter: EventEmitter2

      The EventEmitter2 that fires all open-wa events. In local instances of the library, this is the global ev object.

    Returns MessageCollector

Properties

Protected _idletimeout

_idletimeout: Timeout

Protected _timeout

_timeout: Timeout

chat

chat: ChatId

collected

collected: Collection<string, any>

ended

ended: boolean

ev

ev: EventEmitter2

filter

filter: (...args: any[]) => boolean | Promise<boolean>

Type declaration

    • (...args: any[]): boolean | Promise<boolean>
    • Parameters

      • Rest ...args: any[]

      Returns boolean | Promise<boolean>

instanceId

instanceId: string

options

received

received: number

sessionId

sessionId: string

Static Readonly captureRejectionSymbol

captureRejectionSymbol: typeof captureRejectionSymbol

Static captureRejections

captureRejections: boolean

Sets or gets the default captureRejection value for all emitters.

Static defaultMaxListeners

defaultMaxListeners: number

Static Readonly errorMonitor

errorMonitor: typeof errorMonitor

This symbol shall be used to install a listener for only monitoring 'error' events. Listeners installed using this symbol are called before the regular 'error' listeners are called.

Installing a listener using this symbol does not change the behavior once an 'error' event is emitted, therefore the process will still crash if no regular 'error' listener is installed.

Accessors

next

  • get next(): Promise<any>
  • Returns a promise that resolves with the next collected element; rejects with collected elements if the collector finishes without receiving a next element

    readonly

    Returns Promise<any>

Methods

[asyncIterator]

  • [asyncIterator](): any

addListener

  • addListener(eventName: string | symbol, listener: (...args: any[]) => void): MessageCollector
  • Alias for emitter.on(eventName, listener).

    since

    v0.1.26

    Parameters

    • eventName: string | symbol
    • listener: (...args: any[]) => void
        • (...args: any[]): void
        • Parameters

          • Rest ...args: any[]

          Returns void

    Returns MessageCollector

checkEnd

  • checkEnd(): void
  • Checks whether the collector should end, and if so, ends it.

    Returns void

clearImmediate

  • clearImmediate(immediate: Immediate): void
  • Clears an immediate.

    Parameters

    • immediate: Immediate

      Immediate to cancel

    Returns void

clearInterval

  • clearInterval(interval: Timeout): void
  • Clears an interval.

    Parameters

    • interval: Timeout

      Interval to cancel

    Returns void

clearTimeout

  • clearTimeout(timeout: Timeout): void
  • Clears a timeout.

    Parameters

    • timeout: Timeout

      Timeout to cancel

    Returns void

destroy

  • destroy(): void
  • Destroys all assets used by the base client.

    Returns void

dispose

  • dispose(message: Message): `false_${number}-${number}@g.us_${string}` | `false_${number}@c.us_${string}` | `true_${number}-${number}@g.us_${string}` | `true_${number}@c.us_${string}`
  • Handles a message for possible disposal.

    Parameters

    • message: Message

      The message that could be disposed of

    Returns `false_${number}-${number}@g.us_${string}` | `false_${number}@c.us_${string}` | `true_${number}-${number}@g.us_${string}` | `true_${number}@c.us_${string}`

emit

  • emit(eventName: string | symbol, ...args: any[]): boolean
  • Synchronously calls each of the listeners registered for the event namedeventName, in the order they were registered, passing the supplied arguments to each.

    Returns true if the event had listeners, false otherwise.

    const EventEmitter = require('events');
    const myEmitter = new EventEmitter();
    
    // First listener
    myEmitter.on('event', function firstListener() {
      console.log('Helloooo! first listener');
    });
    // Second listener
    myEmitter.on('event', function secondListener(arg1, arg2) {
      console.log(`event with parameters ${arg1}, ${arg2} in second listener`);
    });
    // Third listener
    myEmitter.on('event', function thirdListener(...args) {
      const parameters = args.join(', ');
      console.log(`event with parameters ${parameters} in third listener`);
    });
    
    console.log(myEmitter.listeners('event'));
    
    myEmitter.emit('event', 1, 2, 3, 4, 5);
    
    // Prints:
    // [
    //   [Function: firstListener],
    //   [Function: secondListener],
    //   [Function: thirdListener]
    // ]
    // Helloooo! first listener
    // event with parameters 1, 2 in second listener
    // event with parameters 1, 2, 3, 4, 5 in third listener
    
    since

    v0.1.26

    Parameters

    • eventName: string | symbol
    • Rest ...args: any[]

    Returns boolean

eventNames

  • eventNames(): (string | symbol)[]
  • Returns an array listing the events for which the emitter has registered listeners. The values in the array are strings or Symbols.

    const EventEmitter = require('events');
    const myEE = new EventEmitter();
    myEE.on('foo', () => {});
    myEE.on('bar', () => {});
    
    const sym = Symbol('symbol');
    myEE.on(sym, () => {});
    
    console.log(myEE.eventNames());
    // Prints: [ 'foo', 'bar', Symbol(symbol) ]
    
    since

    v6.0.0

    Returns (string | symbol)[]

eventSignature

getMaxListeners

  • getMaxListeners(): number
  • Returns the current max listener value for the EventEmitter which is either set by emitter.setMaxListeners(n) or defaults to defaultMaxListeners.

    since

    v1.0.0

    Returns number

handleCollect

  • handleCollect(...args: any[]): Promise<void>
  • Call this to handle an event as a collectable element. Accepts any event data as parameters.

    emits

    Collector#collect

    Parameters

    • Rest ...args: any[]

      The arguments emitted by the listener

    Returns Promise<void>

handleDispose

  • handleDispose(...args: any[]): Promise<void>
  • Call this to remove an element from the collection. Accepts any event data as parameters.

    emits

    Collector#dispose

    Parameters

    • Rest ...args: any[]

      The arguments emitted by the listener

    Returns Promise<void>

listenerCount

  • listenerCount(eventName: string | symbol): number
  • Returns the number of listeners listening to the event named eventName.

    since

    v3.2.0

    Parameters

    • eventName: string | symbol

      The name of the event being listened for

    Returns number

listeners

  • listeners(eventName: string | symbol): Function[]
  • Returns a copy of the array of listeners for the event named eventName.

    server.on('connection', (stream) => {
      console.log('someone connected!');
    });
    console.log(util.inspect(server.listeners('connection')));
    // Prints: [ [Function] ]
    
    since

    v0.1.26

    Parameters

    • eventName: string | symbol

    Returns Function[]

off

  • off(eventName: string | symbol, listener: (...args: any[]) => void): MessageCollector
  • Alias for emitter.removeListener().

    since

    v10.0.0

    Parameters

    • eventName: string | symbol
    • listener: (...args: any[]) => void
        • (...args: any[]): void
        • Parameters

          • Rest ...args: any[]

          Returns void

    Returns MessageCollector

on

  • on(eventName: string | symbol, listener: (...args: any[]) => void): MessageCollector
  • Adds the listener function to the end of the listeners array for the event named eventName. No checks are made to see if the listener has already been added. Multiple calls passing the same combination of eventNameand listener will result in the listener being added, and called, multiple times.

    server.on('connection', (stream) => {
      console.log('someone connected!');
    });
    

    Returns a reference to the EventEmitter, so that calls can be chained.

    By default, event listeners are invoked in the order they are added. Theemitter.prependListener() method can be used as an alternative to add the event listener to the beginning of the listeners array.

    const myEE = new EventEmitter();
    myEE.on('foo', () => console.log('a'));
    myEE.prependListener('foo', () => console.log('b'));
    myEE.emit('foo');
    // Prints:
    //   b
    //   a
    
    since

    v0.1.101

    Parameters

    • eventName: string | symbol

      The name of the event.

    • listener: (...args: any[]) => void

      The callback function

        • (...args: any[]): void
        • Parameters

          • Rest ...args: any[]

          Returns void

    Returns MessageCollector

once

  • once(eventName: string | symbol, listener: (...args: any[]) => void): MessageCollector
  • Adds a one-timelistener function for the event named eventName. The next time eventName is triggered, this listener is removed and then invoked.

    server.once('connection', (stream) => {
      console.log('Ah, we have our first user!');
    });
    

    Returns a reference to the EventEmitter, so that calls can be chained.

    By default, event listeners are invoked in the order they are added. Theemitter.prependOnceListener() method can be used as an alternative to add the event listener to the beginning of the listeners array.

    const myEE = new EventEmitter();
    myEE.once('foo', () => console.log('a'));
    myEE.prependOnceListener('foo', () => console.log('b'));
    myEE.emit('foo');
    // Prints:
    //   b
    //   a
    
    since

    v0.3.0

    Parameters

    • eventName: string | symbol

      The name of the event.

    • listener: (...args: any[]) => void

      The callback function

        • (...args: any[]): void
        • Parameters

          • Rest ...args: any[]

          Returns void

    Returns MessageCollector

prependListener

  • prependListener(eventName: string | symbol, listener: (...args: any[]) => void): MessageCollector
  • Adds the listener function to the beginning of the listeners array for the event named eventName. No checks are made to see if the listener has already been added. Multiple calls passing the same combination of eventNameand listener will result in the listener being added, and called, multiple times.

    server.prependListener('connection', (stream) => {
      console.log('someone connected!');
    });
    

    Returns a reference to the EventEmitter, so that calls can be chained.

    since

    v6.0.0

    Parameters

    • eventName: string | symbol

      The name of the event.

    • listener: (...args: any[]) => void

      The callback function

        • (...args: any[]): void
        • Parameters

          • Rest ...args: any[]

          Returns void

    Returns MessageCollector

prependOnceListener

  • prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): MessageCollector
  • Adds a one-timelistener function for the event named eventName to the_beginning_ of the listeners array. The next time eventName is triggered, this listener is removed, and then invoked.

    server.prependOnceListener('connection', (stream) => {
      console.log('Ah, we have our first user!');
    });
    

    Returns a reference to the EventEmitter, so that calls can be chained.

    since

    v6.0.0

    Parameters

    • eventName: string | symbol

      The name of the event.

    • listener: (...args: any[]) => void

      The callback function

        • (...args: any[]): void
        • Parameters

          • Rest ...args: any[]

          Returns void

    Returns MessageCollector

rawListeners

  • rawListeners(eventName: string | symbol): Function[]
  • Returns a copy of the array of listeners for the event named eventName, including any wrappers (such as those created by .once()).

    const emitter = new EventEmitter();
    emitter.once('log', () => console.log('log once'));
    
    // Returns a new Array with a function `onceWrapper` which has a property
    // `listener` which contains the original listener bound above
    const listeners = emitter.rawListeners('log');
    const logFnWrapper = listeners[0];
    
    // Logs "log once" to the console and does not unbind the `once` event
    logFnWrapper.listener();
    
    // Logs "log once" to the console and removes the listener
    logFnWrapper();
    
    emitter.on('log', () => console.log('log persistently'));
    // Will return a new Array with a single function bound by `.on()` above
    const newListeners = emitter.rawListeners('log');
    
    // Logs "log persistently" twice
    newListeners[0]();
    emitter.emit('log');
    
    since

    v9.4.0

    Parameters

    • eventName: string | symbol

    Returns Function[]

removeAllListeners

  • Removes all listeners, or those of the specified eventName.

    It is bad practice to remove listeners added elsewhere in the code, particularly when the EventEmitter instance was created by some other component or module (e.g. sockets or file streams).

    Returns a reference to the EventEmitter, so that calls can be chained.

    since

    v0.1.26

    Parameters

    • Optional event: string | symbol

    Returns MessageCollector

removeListener

  • removeListener(eventName: string | symbol, listener: (...args: any[]) => void): MessageCollector
  • Removes the specified listener from the listener array for the event namedeventName.

    const callback = (stream) => {
      console.log('someone connected!');
    };
    server.on('connection', callback);
    // ...
    server.removeListener('connection', callback);
    

    removeListener() will remove, at most, one instance of a listener from the listener array. If any single listener has been added multiple times to the listener array for the specified eventName, then removeListener() must be called multiple times to remove each instance.

    Once an event is emitted, all listeners attached to it at the time of emitting are called in order. This implies that anyremoveListener() or removeAllListeners() calls after emitting and_before_ the last listener finishes execution will not remove them fromemit() in progress. Subsequent events behave as expected.

    const myEmitter = new MyEmitter();
    
    const callbackA = () => {
      console.log('A');
      myEmitter.removeListener('event', callbackB);
    };
    
    const callbackB = () => {
      console.log('B');
    };
    
    myEmitter.on('event', callbackA);
    
    myEmitter.on('event', callbackB);
    
    // callbackA removes listener callbackB but it will still be called.
    // Internal listener array at time of emit [callbackA, callbackB]
    myEmitter.emit('event');
    // Prints:
    //   A
    //   B
    
    // callbackB is now removed.
    // Internal listener array [callbackA]
    myEmitter.emit('event');
    // Prints:
    //   A
    

    Because listeners are managed using an internal array, calling this will change the position indices of any listener registered after the listener being removed. This will not impact the order in which listeners are called, but it means that any copies of the listener array as returned by the emitter.listeners() method will need to be recreated.

    When a single function has been added as a handler multiple times for a single event (as in the example below), removeListener() will remove the most recently added instance. In the example the once('ping')listener is removed:

    const ee = new EventEmitter();
    
    function pong() {
      console.log('pong');
    }
    
    ee.on('ping', pong);
    ee.once('ping', pong);
    ee.removeListener('ping', pong);
    
    ee.emit('ping');
    ee.emit('ping');
    

    Returns a reference to the EventEmitter, so that calls can be chained.

    since

    v0.1.26

    Parameters

    • eventName: string | symbol
    • listener: (...args: any[]) => void
        • (...args: any[]): void
        • Parameters

          • Rest ...args: any[]

          Returns void

    Returns MessageCollector

resetTimer

  • resetTimer(__namedParameters?: { idle: any; time: any }): void
  • Resets the collectors timeout and idle timer.

    Parameters

    • __namedParameters: { idle: any; time: any } = ...
      • idle: any
      • time: any

    Returns void

setImmediate

  • setImmediate(fn: (...args: any[]) => any, ...args: any[]): Immediate
  • Sets an immediate that will be automatically cancelled if the client is destroyed.

    Parameters

    • fn: (...args: any[]) => any

      Function to execute

        • (...args: any[]): any
        • Parameters

          • Rest ...args: any[]

          Returns any

    • Rest ...args: any[]

      Arguments for the function

    Returns Immediate

setInterval

  • setInterval(fn: (...args: any[]) => any, delay: number, ...args: any[]): Timeout
  • Sets an interval that will be automatically cancelled if the client is destroyed.

    Parameters

    • fn: (...args: any[]) => any

      Function to execute

        • (...args: any[]): any
        • Parameters

          • Rest ...args: any[]

          Returns any

    • delay: number

      Time to wait between executions (in milliseconds)

    • Rest ...args: any[]

      Arguments for the function

    Returns Timeout

setMaxListeners

  • By default EventEmitters will print a warning if more than 10 listeners are added for a particular event. This is a useful default that helps finding memory leaks. The emitter.setMaxListeners() method allows the limit to be modified for this specific EventEmitter instance. The value can be set toInfinity (or 0) to indicate an unlimited number of listeners.

    Returns a reference to the EventEmitter, so that calls can be chained.

    since

    v0.3.5

    Parameters

    • n: number

    Returns MessageCollector

setTimeout

  • setTimeout(fn: (...args: any[]) => any, delay: number, ...args: any[]): Timeout
  • Sets a timeout that will be automatically cancelled if the client is destroyed.

    Parameters

    • fn: (...args: any[]) => any

      Function to execute

        • (...args: any[]): any
        • Parameters

          • Rest ...args: any[]

          Returns any

    • delay: number

      Time to wait before executing (in milliseconds)

    • Rest ...args: any[]

      Arguments for the function

    Returns Timeout

stop

  • stop(reason?: string): void
  • Stops this collector and emits the end event.

    emits

    Collector#end

    Parameters

    • reason: string = 'user'

    Returns void

wrapHandler

  • wrapHandler(handler: (data: any) => any): (__namedParameters: { data: any }) => any
  • Parameters

    • handler: (data: any) => any
        • (data: any): any
        • Parameters

          • data: any

          Returns any

    Returns (__namedParameters: { data: any }) => any

      • (__namedParameters: { data: any }): any
      • Parameters

        • __namedParameters: { data: any }
          • data: any

        Returns any

Static getEventListeners

  • getEventListeners(emitter: DOMEventTarget | EventEmitter, name: string | symbol): Function[]
  • Returns a copy of the array of listeners for the event named eventName.

    For EventEmitters this behaves exactly the same as calling .listeners on the emitter.

    For EventTargets this is the only way to get the event listeners for the event target. This is useful for debugging and diagnostic purposes.

    const { getEventListeners, EventEmitter } = require('events');
    
    {
      const ee = new EventEmitter();
      const listener = () => console.log('Events are fun');
      ee.on('foo', listener);
      getEventListeners(ee, 'foo'); // [listener]
    }
    {
      const et = new EventTarget();
      const listener = () => console.log('Events are fun');
      et.addEventListener('foo', listener);
      getEventListeners(et, 'foo'); // [listener]
    }
    
    since

    v15.2.0

    Parameters

    • emitter: DOMEventTarget | EventEmitter
    • name: string | symbol

    Returns Function[]

Static listenerCount

  • listenerCount(emitter: EventEmitter, eventName: string | symbol): number
  • A class method that returns the number of listeners for the given eventNameregistered on the given emitter.

    const { EventEmitter, listenerCount } = require('events');
    const myEmitter = new EventEmitter();
    myEmitter.on('event', () => {});
    myEmitter.on('event', () => {});
    console.log(listenerCount(myEmitter, 'event'));
    // Prints: 2
    
    since

    v0.9.12

    deprecated

    Since v3.2.0 - Use listenerCount instead.

    Parameters

    • emitter: EventEmitter

      The emitter to query

    • eventName: string | symbol

      The event name

    Returns number

Static on

  • on(emitter: EventEmitter, eventName: string, options?: StaticEventEmitterOptions): AsyncIterableIterator<any>
  • ```js const { on, EventEmitter } = require('events');

    (async () => { const ee = new EventEmitter();

    // Emit later on process.nextTick(() => { ee.emit('foo', 'bar'); ee.emit('foo', 42); });

    for await (const event of on(ee, 'foo')) { // The execution of this inner block is synchronous and it // processes one event at a time (even with await). Do not use // if concurrent execution is required. console.log(event); // prints ['bar'] [42] } // Unreachable here })();

    
    Returns an `AsyncIterator` that iterates `eventName` events. It will throw
    if the `EventEmitter` emits `'error'`. It removes all listeners when
    exiting the loop. The `value` returned by each iteration is an array
    composed of the emitted event arguments.
    
    An `AbortSignal` can be used to cancel waiting on events:
    
    ```js
    const { on, EventEmitter } = require('events');
    const ac = new AbortController();
    
    (async () => {
      const ee = new EventEmitter();
    
      // Emit later on
      process.nextTick(() => {
        ee.emit('foo', 'bar');
        ee.emit('foo', 42);
      });
    
      for await (const event of on(ee, 'foo', { signal: ac.signal })) {
        // The execution of this inner block is synchronous and it
        // processes one event at a time (even with await). Do not use
        // if concurrent execution is required.
        console.log(event); // prints ['bar'] [42]
      }
      // Unreachable here
    })();
    
    process.nextTick(() => ac.abort());
    
    since

    v13.6.0, v12.16.0

    Parameters

    • emitter: EventEmitter
    • eventName: string

      The name of the event being listened for

    • Optional options: StaticEventEmitterOptions

    Returns AsyncIterableIterator<any>

    that iterates eventName events emitted by the emitter

Static once

  • once(emitter: NodeEventTarget, eventName: string | symbol, options?: StaticEventEmitterOptions): Promise<any[]>
  • once(emitter: DOMEventTarget, eventName: string, options?: StaticEventEmitterOptions): Promise<any[]>
  • Creates a Promise that is fulfilled when the EventEmitter emits the given event or that is rejected if the EventEmitter emits 'error' while waiting. The Promise will resolve with an array of all the arguments emitted to the given event.

    This method is intentionally generic and works with the web platform EventTarget interface, which has no special'error' event semantics and does not listen to the 'error' event.

    const { once, EventEmitter } = require('events');
    
    async function run() {
      const ee = new EventEmitter();
    
      process.nextTick(() => {
        ee.emit('myevent', 42);
      });
    
      const [value] = await once(ee, 'myevent');
      console.log(value);
    
      const err = new Error('kaboom');
      process.nextTick(() => {
        ee.emit('error', err);
      });
    
      try {
        await once(ee, 'myevent');
      } catch (err) {
        console.log('error happened', err);
      }
    }
    
    run();
    

    The special handling of the 'error' event is only used when events.once()is used to wait for another event. If events.once() is used to wait for the 'error' event itself, then it is treated as any other kind of event without special handling:

    const { EventEmitter, once } = require('events');
    
    const ee = new EventEmitter();
    
    once(ee, 'error')
      .then(([err]) => console.log('ok', err.message))
      .catch((err) => console.log('error', err.message));
    
    ee.emit('error', new Error('boom'));
    
    // Prints: ok boom
    

    An AbortSignal can be used to cancel waiting for the event:

    const { EventEmitter, once } = require('events');
    
    const ee = new EventEmitter();
    const ac = new AbortController();
    
    async function foo(emitter, event, signal) {
      try {
        await once(emitter, event, { signal });
        console.log('event emitted!');
      } catch (error) {
        if (error.name === 'AbortError') {
          console.error('Waiting for the event was canceled!');
        } else {
          console.error('There was an error', error.message);
        }
      }
    }
    
    foo(ee, 'foo', ac.signal);
    ac.abort(); // Abort waiting for the event
    ee.emit('foo'); // Prints: Waiting for the event was canceled!
    
    since

    v11.13.0, v10.16.0

    Parameters

    • emitter: NodeEventTarget
    • eventName: string | symbol
    • Optional options: StaticEventEmitterOptions

    Returns Promise<any[]>

  • Parameters

    • emitter: DOMEventTarget
    • eventName: string
    • Optional options: StaticEventEmitterOptions

    Returns Promise<any[]>