Exclude PresenceMessage from BaseRealtime bundle

Now PresenceMessage only gets included if you provide the
RealtimePresence module.

src/common/lib/client/baserealtime.ts

@@ -9,8 +9,7 @@ import ProtocolMessage from '../types/protocolmessage';
 import { ChannelOptions } from '../../types/channel';
 import ClientOptions from '../../types/ClientOptions';
 import * as API from '../../../../ably';
-import { ModulesMap } from './modulesmap';
-import RealtimePresence from './realtimepresence';
+import { ModulesMap, RealtimePresenceModule } from './modulesmap';
 import { TransportNames } from 'common/constants/TransportName';
 import { TransportImplementations } from 'common/platform';
 import { RealtimePublishing } from './realtimepublishing';
@@ -19,7 +18,7 @@ import { RealtimePublishing } from './realtimepublishing';
  `BaseRealtime` is an export of the tree-shakable version of the SDK, and acts as the base class for the `DefaultRealtime` class exported by the non tree-shakable version.
  */
 class BaseRealtime extends BaseClient {
-  readonly _RealtimePresence: typeof RealtimePresence | null;
+  readonly _RealtimePresence: RealtimePresenceModule | null;
   readonly __RealtimePublishing: typeof RealtimePublishing | null;
   // Extra transport implementations available to this client, in addition to those in Platform.Transports.bundledImplementations
   readonly _additionalTransportImplementations: TransportImplementations;

src/common/lib/client/defaultrealtime.ts

@@ -12,6 +12,10 @@ import { DefaultPresenceMessage } from '../types/defaultpresencemessage';
 import initialiseWebSocketTransport from '../transport/websockettransport';
 import { FilteredSubscriptions } from './filteredsubscriptions';
 import { RealtimePublishing } from './realtimepublishing';
+import {
+  fromValues as presenceMessageFromValues,
+  fromValuesArray as presenceMessagesFromValuesArray,
+} from '../types/presencemessage';
 
 /**
  `DefaultRealtime` is the class that the non tree-shakable version of the SDK exports as `Realtime`. It ensures that this version of the SDK includes all of the functionality which is optionally available in the tree-shakable version.
@@ -27,7 +31,11 @@ export class DefaultRealtime extends BaseRealtime {
       ...allCommonModules,
       Crypto: DefaultRealtime.Crypto ?? undefined,
       MsgPack,
-      RealtimePresence,
+      RealtimePresence: {
+        RealtimePresence,
+        presenceMessageFromValues,
+        presenceMessagesFromValuesArray,
+      },
       WebSocketTransport: initialiseWebSocketTransport,
       MessageInteractions: FilteredSubscriptions,
       RealtimePublishing: RealtimePublishing,

src/common/lib/client/modulesmap.ts

@@ -7,12 +7,25 @@ import XHRRequest from 'platform/web/lib/http/request/xhrrequest';
 import fetchRequest from 'platform/web/lib/http/request/fetchrequest';
 import { FilteredSubscriptions } from './filteredsubscriptions';
 import { RealtimePublishing } from './realtimepublishing';
+import {
+  fromValues as presenceMessageFromValues,
+  fromValuesArray as presenceMessagesFromValuesArray,
+} from '../types/presencemessage';
+
+export interface PresenceMessageModule {
+  presenceMessageFromValues: typeof presenceMessageFromValues;
+  presenceMessagesFromValuesArray: typeof presenceMessagesFromValuesArray;
+}
+
+export type RealtimePresenceModule = PresenceMessageModule & {
+  RealtimePresence: typeof RealtimePresence;
+};
 
 export interface ModulesMap {
   Rest?: typeof Rest;
   Crypto?: IUntypedCryptoStatic;
   MsgPack?: MsgPack;
-  RealtimePresence?: typeof RealtimePresence;
+  RealtimePresence?: RealtimePresenceModule;
   WebSocketTransport?: TransportInitialiser;
   XHRPolling?: TransportInitialiser;
   XHRStreaming?: TransportInitialiser;

src/common/lib/client/realtimechannel.ts

@@ -10,11 +10,7 @@ import RealtimePresence from './realtimepresence';
 import Message, { decode as decodeMessage } from '../types/message';
 import ChannelStateChange from './channelstatechange';
 import ErrorInfo, { IPartialErrorInfo, PartialErrorInfo } from '../types/errorinfo';
-import PresenceMessage, {
-  fromValues as presenceMessageFromValues,
-  fromValuesArray as presenceMessagesFromValuesArray,
-  decode as decodePresenceMessage,
-} from '../types/presencemessage';
+import PresenceMessage, { decode as decodePresenceMessage } from '../types/presencemessage';
 import ConnectionErrors from '../transport/connectionerrors';
 import * as API from '../../../../ably';
 import ConnectionManager from '../transport/connectionmanager';
@@ -102,7 +98,7 @@ class RealtimeChannel extends EventEmitter {
     this.name = name;
     this.channelOptions = normaliseChannelOptions(client._Crypto ?? null, options);
     this.client = client;
-    this._presence = client._RealtimePresence ? new client._RealtimePresence(this) : null;
+    this._presence = client._RealtimePresence ? new client._RealtimePresence.RealtimePresence(this) : null;
     this.connectionManager = client.connection.connectionManager;
     this.state = 'initialized';
     this.subscriptions = new EventEmitter();
@@ -440,8 +436,8 @@ class RealtimeChannel extends EventEmitter {
       action: actions.PRESENCE,
       channel: this.name,
       presence: Utils.isArray(presence)
-        ? presenceMessagesFromValuesArray(presence)
-        : [presenceMessageFromValues(presence)],
+        ? this.client._RealtimePresence!.presenceMessagesFromValuesArray(presence)
+        : [this.client._RealtimePresence!.presenceMessageFromValues(presence)],
     });
     this.sendMessage(msg, callback);
   }
@@ -516,7 +512,12 @@ class RealtimeChannel extends EventEmitter {
         if (!message.presence) break;
       // eslint-disable-next-line no-fallthrough
       case actions.PRESENCE: {
-        const presence = message.presence as Array<PresenceMessage>;
+        const presence = message.presence;
+
+        if (!presence) {
+          break;
+        }
+
         const { id, connectionId, timestamp } = message;
 
         const options = this.channelOptions;

src/common/lib/transport/comettransport.ts

@@ -348,7 +348,10 @@ abstract class CometTransport extends Transport {
     try {
       const items = this.decodeResponse(responseData);
       if (items && items.length)
-        for (let i = 0; i < items.length; i++) this.onProtocolMessage(protocolMessageFromDeserialized(items[i]));
+        for (let i = 0; i < items.length; i++)
+          this.onProtocolMessage(
+            protocolMessageFromDeserialized(items[i], this.connectionManager.realtime._RealtimePresence)
+          );
     } catch (e) {
       Logger.logAction(
         Logger.LOG_ERROR,

src/common/lib/transport/connectionmanager.ts

@@ -1914,7 +1914,11 @@ class ConnectionManager extends EventEmitter {
       return;
     }
     if (Logger.shouldLog(Logger.LOG_MICRO)) {
-      Logger.logAction(Logger.LOG_MICRO, 'ConnectionManager.send()', 'queueing msg; ' + stringifyProtocolMessage(msg));
+      Logger.logAction(
+        Logger.LOG_MICRO,
+        'ConnectionManager.send()',
+        'queueing msg; ' + stringifyProtocolMessage(msg, this.realtime._RealtimePresence)
+      );
     }
     this.queue(msg, callback);
   }

src/common/lib/transport/protocol.ts

@@ -74,7 +74,8 @@ class Protocol extends EventEmitter {
       Logger.logAction(
         Logger.LOG_MICRO,
         'Protocol.send()',
-        'sending msg; ' + stringifyProtocolMessage(pendingMessage.message)
+        'sending msg; ' +
+          stringifyProtocolMessage(pendingMessage.message, this.transport.connectionManager.realtime._RealtimePresence)
       );
     }
     pendingMessage.sendAttempted = true;

src/common/lib/transport/transport.ts

@@ -123,7 +123,7 @@ abstract class Transport extends EventEmitter {
         'received on ' +
           this.shortName +
           ': ' +
-          stringifyProtocolMessage(message) +
+          stringifyProtocolMessage(message, this.connectionManager.realtime._RealtimePresence) +
           '; connectionId = ' +
           this.connectionManager.connectionId
       );

src/common/lib/transport/websockettransport.ts

@@ -125,7 +125,14 @@ class WebSocketTransport extends Transport {
       'data received; length = ' + data.length + '; type = ' + typeof data
     );
     try {
-      this.onProtocolMessage(deserializeProtocolMessage(data, this.connectionManager.realtime._MsgPack, this.format));
+      this.onProtocolMessage(
+        deserializeProtocolMessage(
+          data,
+          this.connectionManager.realtime._MsgPack,
+          this.connectionManager.realtime._RealtimePresence,
+          this.format
+        )
+      );
     } catch (e) {
       Logger.logAction(
         Logger.LOG_ERROR,

src/common/lib/types/defaultprotocolmessage.ts

@@ -1,10 +1,14 @@
 import ProtocolMessage, { fromDeserialized } from './protocolmessage';
+import {
+  fromValues as presenceMessageFromValues,
+  fromValuesArray as presenceMessagesFromValuesArray,
+} from './presencemessage';
 
 /**
  `DefaultPresenceMessage` is the class returned by `DefaultRealtime`’s `PresenceMessage` static property. It exposes the static methods that are used by the tests.
  */
 export class DefaultProtocolMessage extends ProtocolMessage {
   static fromDeserialized(deserialized: Record<string, unknown>): ProtocolMessage {
-    return fromDeserialized(deserialized);
+    return fromDeserialized(deserialized, { presenceMessageFromValues, presenceMessagesFromValuesArray });
   }
 }

src/common/lib/types/protocolmessage.ts

@@ -1,12 +1,10 @@
 import { MsgPack } from 'common/types/msgpack';
 import { Types } from '../../../../ably';
+import { PresenceMessageModule } from '../client/modulesmap';
 import * as Utils from '../util/utils';
 import ErrorInfo from './errorinfo';
 import Message, { fromValues as messageFromValues, fromValuesArray as messagesFromValuesArray } from './message';
-import PresenceMessage, {
-  fromValues as presenceMessageFromValues,
-  fromValuesArray as presenceMessagesFromValuesArray,
-} from './presencemessage';
+import PresenceMessage from './presencemessage';
 
 export const actions = {
   HEARTBEAT: 0,
@@ -65,26 +63,39 @@ export const channelModes = ['PRESENCE', 'PUBLISH', 'SUBSCRIBE', 'PRESENCE_SUBSC
 
 export const serialize = Utils.encodeBody;
 
-export function deserialize(serialized: unknown, MsgPack: MsgPack | null, format?: Utils.Format): ProtocolMessage {
+export function deserialize(
+  serialized: unknown,
+  MsgPack: MsgPack | null,
+  presenceMessageModule: PresenceMessageModule | null,
+  format?: Utils.Format
+): ProtocolMessage {
   const deserialized = Utils.decodeBody<Record<string, unknown>>(serialized, MsgPack, format);
-  return fromDeserialized(deserialized);
+  return fromDeserialized(deserialized, presenceMessageModule);
 }
 
-export function fromDeserialized(deserialized: Record<string, unknown>): ProtocolMessage {
+export function fromDeserialized(
+  deserialized: Record<string, unknown>,
+  presenceMessageModule: PresenceMessageModule | null
+): ProtocolMessage {
   const error = deserialized.error;
   if (error) deserialized.error = ErrorInfo.fromValues(error as ErrorInfo);
   const messages = deserialized.messages as Message[];
   if (messages) for (let i = 0; i < messages.length; i++) messages[i] = messageFromValues(messages[i]);
-  const presence = deserialized.presence as PresenceMessage[];
-  if (presence) for (let i = 0; i < presence.length; i++) presence[i] = presenceMessageFromValues(presence[i], true);
-  return Object.assign(new ProtocolMessage(), deserialized);
+
+  const presence = presenceMessageModule ? (deserialized.presence as PresenceMessage[]) : undefined;
+  if (presenceMessageModule) {
+    if (presence && presenceMessageModule)
+      for (let i = 0; i < presence.length; i++)
+        presence[i] = presenceMessageModule.presenceMessageFromValues(presence[i], true);
+  }
+  return Object.assign(new ProtocolMessage(), { ...deserialized, presence });
 }
 
 export function fromValues(values: unknown): ProtocolMessage {
   return Object.assign(new ProtocolMessage(), values);
 }
 
-export function stringify(msg: any): string {
+export function stringify(msg: any, presenceMessageModule: PresenceMessageModule | null): string {
   let result = '[ProtocolMessage';
   if (msg.action !== undefined) result += '; action=' + ActionName[msg.action] || msg.action;
 
@@ -96,7 +107,8 @@ export function stringify(msg: any): string {
   }
 
   if (msg.messages) result += '; messages=' + toStringArray(messagesFromValuesArray(msg.messages));
-  if (msg.presence) result += '; presence=' + toStringArray(presenceMessagesFromValuesArray(msg.presence));
+  if (msg.presence && presenceMessageModule)
+    result += '; presence=' + toStringArray(presenceMessageModule.presenceMessagesFromValuesArray(msg.presence));
   if (msg.error) result += '; error=' + ErrorInfo.fromValues(msg.error).toString();
   if (msg.auth && msg.auth.accessToken) result += '; token=' + msg.auth.accessToken;
   if (msg.flags) result += '; flags=' + flagNames.filter(msg.hasFlag).join(',');
@@ -128,6 +140,7 @@ class ProtocolMessage {
   channelSerial?: string | null;
   msgSerial?: number;
   messages?: Message[];
+  // This will be undefined if we skipped decoding this property due to user not requesting presence functionality — see `fromDeserialized`
   presence?: PresenceMessage[];
   auth?: unknown;
   connectionDetails?: Record<string, unknown>;

src/platform/web/modules/realtimepresence.ts

@@ -1 +1,14 @@
-export { default as RealtimePresence } from '../../../common/lib/client/realtimepresence';
+import { RealtimePresenceModule } from 'common/lib/client/modulesmap';
+import { default as realtimePresenceClass } from '../../../common/lib/client/realtimepresence';
+import {
+  fromValues as presenceMessageFromValues,
+  fromValuesArray as presenceMessagesFromValuesArray,
+} from '../../../common/lib/types/presencemessage';
+
+const RealtimePresence: RealtimePresenceModule = {
+  RealtimePresence: realtimePresenceClass,
+  presenceMessageFromValues,
+  presenceMessagesFromValuesArray,
+};
+
+export { RealtimePresence };

test/browser/modules.test.js

@@ -466,6 +466,30 @@ describe('browser/modules', function () {
 
         expect(() => channel.presence).to.throw('RealtimePresence module not provided');
       });
+
+      it('doesn’t break when it receives a PRESENCE ProtocolMessage', async () => {
+        const rxClient = new BaseRealtime(ablyClientOptions(), { WebSocketTransport, FetchRequest });
+        const rxChannel = rxClient.channels.get('channel');
+
+        await rxChannel.attach();
+
+        const receivedMessagePromise = new Promise((resolve) => rxChannel.subscribe(resolve));
+
+        const txClient = new BaseRealtime(ablyClientOptions({ clientId: randomString() }), {
+          WebSocketTransport,
+          FetchRequest,
+          RealtimePublishing,
+          RealtimePresence,
+        });
+        const txChannel = txClient.channels.get('channel');
+
+        await txChannel.publish('message', 'body');
+        await txChannel.presence.enter();
+
+        // The idea being here that in order for receivedMessagePromise to resolve, rxClient must have first processed the PRESENCE ProtocolMessage that resulted from txChannel.presence.enter()
+
+        await receivedMessagePromise;
+      });
     });
 
     describe('BaseRealtime with RealtimePresence', () => {