Remove PresenceMessage-related static things in tree-shakable library

As in cd015e1.

Resolves #1427.

scripts/moduleReport.js

@@ -12,6 +12,8 @@ const functions = [
   { name: 'decodeEncryptedMessage', transitiveImports: ['Crypto'] },
   { name: 'decodeMessages', transitiveImports: [] },
   { name: 'decodeEncryptedMessages', transitiveImports: ['Crypto'] },
+  { name: 'decodePresenceMessage', transitiveImports: [] },
+  { name: 'decodePresenceMessages', transitiveImports: [] },
 ];
 
 function formatBytes(bytes) {

src/common/lib/client/baseclient.ts

@@ -9,7 +9,6 @@ import { IHttp, RequestParams } from '../../types/http';
 import ClientOptions, { NormalisedClientOptions } from '../../types/ClientOptions';
 
 import Platform from '../../platform';
-import PresenceMessage from '../types/presencemessage';
 import { ModulesMap } from './modulesmap';
 import { Rest } from './rest';
 import { IUntypedCryptoStatic } from 'common/types/ICryptoStatic';
@@ -133,7 +132,6 @@ class BaseClient {
   }
 
   static Platform = Platform;
-  static PresenceMessage = PresenceMessage;
 }
 
 export default BaseClient;

src/common/lib/client/defaultrealtime.ts

@@ -8,6 +8,7 @@ import Platform from 'common/platform';
 import { DefaultMessage } from '../types/defaultmessage';
 import { MsgPack } from 'common/types/msgpack';
 import RealtimePresence from './realtimepresence';
+import { DefaultPresenceMessage } from '../types/defaultpresencemessage';
 
 /**
  `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.
@@ -39,6 +40,7 @@ export class DefaultRealtime extends BaseRealtime {
   }
 
   static Message = DefaultMessage;
+  static PresenceMessage = DefaultPresenceMessage;
 
   static _MsgPack: MsgPack | null = null;
 }

src/common/lib/client/defaultrest.ts

@@ -4,6 +4,7 @@ import { allCommonModules } from './modulesmap';
 import Platform from 'common/platform';
 import { DefaultMessage } from '../types/defaultmessage';
 import { MsgPack } from 'common/types/msgpack';
+import { DefaultPresenceMessage } from '../types/defaultpresencemessage';
 
 /**
  `DefaultRest` is the class that the non tree-shakable version of the SDK exports as `Rest`. It ensures that this version of the SDK includes all of the functionality which is optionally available in the tree-shakable version.
@@ -35,6 +36,7 @@ export class DefaultRest extends BaseRest {
   }
 
   static Message = DefaultMessage;
+  static PresenceMessage = DefaultPresenceMessage;
 
   static _MsgPack: MsgPack | null = null;
 }

src/common/lib/types/defaultpresencemessage.ts

@@ -0,0 +1,18 @@
+import * as API from '../../../../ably';
+import PresenceMessage, { fromEncoded, fromEncodedArray } from './presencemessage';
+
+/**
+ `DefaultPresenceMessage` is the class returned by `DefaultRest` and `DefaultRealtime`’s `PresenceMessage` static property. It introduces the static methods described in the `PresenceMessageStatic` interface of the public API of the non tree-shakable version of the library.
+ */
+export class DefaultPresenceMessage extends PresenceMessage {
+  static async fromEncoded(encoded: unknown, inputOptions?: API.Types.ChannelOptions): Promise<PresenceMessage> {
+    return fromEncoded(encoded, inputOptions);
+  }
+
+  static async fromEncodedArray(
+    encodedArray: Array<unknown>,
+    options?: API.Types.ChannelOptions
+  ): Promise<PresenceMessage[]> {
+    return fromEncodedArray(encodedArray, options);
+  }
+}

src/common/lib/types/presencemessage.ts

@@ -9,6 +9,29 @@ function toActionValue(actionString: string) {
   return PresenceMessage.Actions.indexOf(actionString);
 }
 
+export async function fromEncoded(encoded: unknown, options?: API.Types.ChannelOptions): Promise<PresenceMessage> {
+  const msg = PresenceMessage.fromValues(encoded as PresenceMessage | Record<string, unknown>, true);
+  /* if decoding fails at any point, catch and return the message decoded to
+   * the fullest extent possible */
+  try {
+    await PresenceMessage.decode(msg, options ?? {});
+  } catch (e) {
+    Logger.logAction(Logger.LOG_ERROR, 'PresenceMessage.fromEncoded()', (e as Error).toString());
+  }
+  return msg;
+}
+
+export async function fromEncodedArray(
+  encodedArray: unknown[],
+  options?: API.Types.ChannelOptions
+): Promise<PresenceMessage[]> {
+  return Promise.all(
+    encodedArray.map(function (encoded) {
+      return PresenceMessage.fromEncoded(encoded, options);
+    })
+  );
+}
+
 class PresenceMessage {
   action?: string | number;
   id?: string;
@@ -140,26 +163,14 @@ class PresenceMessage {
   }
 
   static async fromEncoded(encoded: unknown, options?: API.Types.ChannelOptions): Promise<PresenceMessage> {
-    const msg = PresenceMessage.fromValues(encoded as PresenceMessage | Record<string, unknown>, true);
-    /* if decoding fails at any point, catch and return the message decoded to
-     * the fullest extent possible */
-    try {
-      await PresenceMessage.decode(msg, options ?? {});
-    } catch (e) {
-      Logger.logAction(Logger.LOG_ERROR, 'PresenceMessage.fromEncoded()', (e as Error).toString());
-    }
-    return msg;
+    return fromEncoded(encoded, options);
   }
 
   static async fromEncodedArray(
     encodedArray: unknown[],
     options?: API.Types.ChannelOptions
   ): Promise<PresenceMessage[]> {
-    return Promise.all(
-      encodedArray.map(function (encoded) {
-        return PresenceMessage.fromEncoded(encoded, options);
-      })
-    );
+    return fromEncodedArray(encodedArray, options);
   }
 
   static getMessagesSize = Message.getMessagesSize;

src/platform/web/modules.ts

@@ -40,6 +40,7 @@ if (Platform.Config.noUpgrade) {
 
 export * from './modules/crypto';
 export * from './modules/message';
+export * from './modules/presencemessage';
 export * from './modules/msgpack';
 export * from './modules/realtimepresence';
 export { Rest } from '../../common/lib/client/rest';

src/platform/web/modules/presencemessage.ts

@@ -0,0 +1,12 @@
+import * as API from '../../../../ably';
+import { fromEncoded, fromEncodedArray } from '../../../common/lib/types/presencemessage';
+
+// The type assertions for the decode* functions below are due to https://github.com/ably/ably-js/issues/1421
+
+export const decodePresenceMessage = ((obj, options) => {
+  return fromEncoded(obj, options);
+}) as API.Types.PresenceMessageStatic['fromEncoded'];
+
+export const decodePresenceMessages = ((obj, options) => {
+  return fromEncodedArray(obj, options);
+}) as API.Types.PresenceMessageStatic['fromEncodedArray'];

test/browser/modules.test.js

@@ -11,6 +11,8 @@ import {
   Crypto,
   MsgPack,
   RealtimePresence,
+  decodePresenceMessage,
+  decodePresenceMessages,
 } from '../../build/modules/index.js';
 
 describe('browser/modules', function () {
@@ -351,4 +353,37 @@ describe('browser/modules', function () {
       });
     });
   });
+
+  describe('PresenceMessage standalone functions', () => {
+    describe('decodePresenceMessage', () => {
+      it('decodes a presence message’s data', async () => {
+        const buffer = BufferUtils.utf8Encode('foo');
+        const encodedMessage = { data: BufferUtils.base64Encode(buffer), encoding: 'base64' };
+
+        const decodedMessage = await decodePresenceMessage(encodedMessage);
+
+        expect(BufferUtils.areBuffersEqual(decodedMessage.data, buffer)).to.be.true;
+        expect(decodedMessage.encoding).to.be.null;
+      });
+    });
+
+    describe('decodeMessages', () => {
+      it('decodes presence messages’ data', async () => {
+        const buffers = ['foo', 'bar'].map((data) => BufferUtils.utf8Encode(data));
+        const encodedMessages = buffers.map((buffer) => ({
+          data: BufferUtils.base64Encode(buffer),
+          encoding: 'base64',
+        }));
+
+        const decodedMessages = await decodePresenceMessages(encodedMessages);
+
+        for (let i = 0; i < decodedMessages.length; i++) {
+          const decodedMessage = decodedMessages[i];
+
+          expect(BufferUtils.areBuffersEqual(decodedMessage.data, buffers[i])).to.be.true;
+          expect(decodedMessage.encoding).to.be.null;
+        }
+      });
+    });
+  });
 });