fix(ipc): Propagate per-client disconnects, add proper routing for targeted messages, and remove unused node-ipc deps

changelog.md

@@ -1,5 +1,16 @@
 # Changelog
 
+## 2025-08-29 - 2.2.2 - fix(ipc)
+Propagate per-client disconnects, add proper routing for targeted messages, and remove unused node-ipc deps
+
+- Forward per-client 'clientDisconnected' events from transports up through IpcChannel and IpcServer so higher layers can react and clean up state.
+- IpcChannel re-emits 'clientDisconnected' and allows registering handlers for it.
+- IpcServer now listens for 'clientDisconnected' to cleanup topic subscriptions, remove clients from the map, and emit 'clientDisconnect'.
+- sendToClient injects the target clientId into headers so transports can route messages to the correct socket instead of broadcasting.
+- broadcast and broadcastTo delegate to sendToClient to ensure messages are routed to intended recipients and errors are attributed to the correct client.
+- Transports now emit 'clientDisconnected' with the clientId when known.
+- package.json: removed unused node-ipc and @types/node-ipc dependencies (dependency cleanup).
+
 ## 2025-08-29 - 2.2.1 - fix(tests)
 Remove redundant manual topic handlers from tests and rely on server built-in pub/sub
 

package.json

@@ -24,9 +24,7 @@
   },
   "dependencies": {
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+    "@push.rocks/smartrx": "^3.0.10"
-    "@types/node-ipc": "^9.1.1",
-    "node-ipc": "^12.0.0"
   },
   "keywords": [
     "IPC",

pnpm-lock.yaml

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-      safe-buffer: 5.1.2
-      string_decoder: 1.1.1
-      util-deprecate: 1.0.2
-
   readable-stream@3.6.2:
     dependencies:
       inherits: 2.0.4
@@ -9183,8 +9013,6 @@ snapshots:
     transitivePeerDependencies:
       - supports-color
 
-  safe-buffer@5.1.2: {}
-
   safe-buffer@5.2.1: {}
 
   safe-regex-test@1.1.0:
@@ -9395,12 +9223,6 @@ snapshots:
       emoji-regex: 9.2.2
       strip-ansi: 7.1.0
 
-  string_decoder@0.10.31: {}
-
-  string_decoder@1.1.1:
-    dependencies:
-      safe-buffer: 5.1.2
-
   string_decoder@1.3.0:
     dependencies:
       safe-buffer: 5.2.1
@@ -9428,10 +9250,6 @@ snapshots:
 
   strnum@2.1.1: {}
 
-  strong-type@0.1.6: {}
-
-  strong-type@1.1.0: {}
-
   strtok3@10.3.4:
     dependencies:
       '@tokenizer/token': 0.3.0
@@ -9490,11 +9308,6 @@ snapshots:
     transitivePeerDependencies:
       - supports-color
 
-  through2@2.0.5:
-    dependencies:
-      readable-stream: 2.3.8
-      xtend: 4.0.2
-
   through2@4.0.2:
     dependencies:
       readable-stream: 3.6.2
@@ -9619,8 +9432,6 @@ snapshots:
 
   unpipe@1.0.0: {}
 
-  untildify@4.0.0: {}
-
   upper-case@1.1.3: {}
 
   url@0.11.4:
@@ -9719,24 +9530,10 @@ snapshots:
 
   xmlhttprequest-ssl@2.1.2: {}
 
-  xtend@4.0.2: {}
-
   y18n@5.0.8: {}
 
-  yargs-parser@20.2.9: {}
-
   yargs-parser@21.1.1: {}
 
-  yargs@16.2.0:
-    dependencies:
-      cliui: 7.0.4
-      escalade: 3.2.0
-      get-caller-file: 2.0.5
-      require-directory: 2.1.1
-      string-width: 4.2.3
-      y18n: 5.0.8
-      yargs-parser: 20.2.9
-
   yargs@17.7.2:
     dependencies:
       cliui: 8.0.1

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartipc',
-  version: '2.2.1',
+  version: '2.2.2',
   description: 'A library for node inter process communication, providing an easy-to-use API for IPC.'
 }

ts/classes.ipcchannel.ts

@@ -128,6 +128,13 @@ export class IpcChannel<TRequest = any, TResponse = any> extends plugins.EventEm
       this.handleMessage(message);
     });
 
+    // Forward per-client disconnects from transports that support multi-client servers
+    // We re-emit a 'clientDisconnected' event with the clientId if known so higher layers can act.
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    (this.transport as any).on?.('clientDisconnected', (_socket: any, clientId?: string) => {
+      this.emit('clientDisconnected', clientId);
+    });
+
     this.transport.on('drain', () => {
       this.emit('drain');
     });
@@ -461,7 +468,7 @@ export class IpcChannel<TRequest = any, TResponse = any> extends plugins.EventEm
    * Register a message handler
    */
   public on(event: string, handler: (payload: any) => any | Promise<any>): this {
-    if (event === 'message' || event === 'connect' || event === 'disconnect' || event === 'error' || event === 'reconnecting' || event === 'drain' || event === 'heartbeatTimeout') {
+    if (event === 'message' || event === 'connect' || event === 'disconnect' || event === 'error' || event === 'reconnecting' || event === 'drain' || event === 'heartbeatTimeout' || event === 'clientDisconnected') {
       // Special handling for channel events
       super.on(event, handler);
     } else {
@@ -522,4 +529,4 @@ export class IpcChannel<TRequest = any, TResponse = any> extends plugins.EventEm
       }
     };
   }
-}
+}

ts/classes.ipcserver.ts

@@ -211,6 +211,17 @@ export class IpcServer extends plugins.EventEmitter {
     this.isRunning = true;
     this.startClientIdleCheck();
     this.emit('start');
+
+    // Track individual client disconnects forwarded by the channel/transport
+    this.primaryChannel.on('clientDisconnected', (clientId?: string) => {
+      if (!clientId) return;
+      // Clean up any topic subscriptions and client map entry
+      this.cleanupClientSubscriptions(clientId);
+      if (this.clients.has(clientId)) {
+        this.clients.delete(clientId);
+        this.emit('clientDisconnect', clientId);
+      }
+    });
     
     // Handle readiness based on options
     if (options.readyWhen === 'accepting') {
@@ -375,7 +386,14 @@ export class IpcServer extends plugins.EventEmitter {
       throw new Error(`Client ${clientId} not found`);
     }
 
-    await client.channel.sendMessage(type, payload, headers);
+    // Ensure the target clientId is part of the headers so the transport
+    // can route the message to the correct socket instead of broadcasting.
+    const routedHeaders: Record<string, any> | undefined = {
+      ...(headers || {}),
+      clientId,
+    };
+
+    await client.channel.sendMessage(type, payload, routedHeaders);
   }
 
   /**
@@ -400,13 +418,12 @@ export class IpcServer extends plugins.EventEmitter {
    */
   public async broadcast(type: string, payload: any, headers?: Record<string, any>): Promise<void> {
     const promises: Promise<void>[] = [];
-    
+
-    for (const [clientId, client] of this.clients) {
+    for (const [clientId] of this.clients) {
       promises.push(
-        client.channel.sendMessage(type, payload, headers)
+        this.sendToClient(clientId, type, payload, headers).catch((error) => {
-          .catch((error) => {
+          this.emit('error', error, clientId);
-            this.emit('error', error, clientId);
+        })
-          })
       );
     }
 
@@ -423,14 +440,13 @@ export class IpcServer extends plugins.EventEmitter {
     headers?: Record<string, any>
   ): Promise<void> {
     const promises: Promise<void>[] = [];
-    
+
     for (const [clientId, client] of this.clients) {
       if (filter(clientId, client.metadata)) {
         promises.push(
-          client.channel.sendMessage(type, payload, headers)
+          this.sendToClient(clientId, type, payload, headers).catch((error) => {
-            .catch((error) => {
+            this.emit('error', error, clientId);
-              this.emit('error', error, clientId);
+          })
-            })
         );
       }
     }
@@ -552,4 +568,4 @@ export class IpcServer extends plugins.EventEmitter {
   public getIsReady(): boolean {
     return this.isReady;
   }
-}
+}

ts/classes.transports.ts

@@ -267,7 +267,8 @@ export class UnixSocketTransport extends IpcTransport {
             this.clientIdToSocket.delete(clientId);
           }
           this.socketToClientId.delete(socket);
-          this.emit('clientDisconnected', socket);
+          // Emit with clientId if known so higher layers can react
+          this.emit('clientDisconnected', socket, clientId);
         });
 
         socket.on('drain', () => {