added missing generic listener syntax example

Author: Mohit Tejani

docs-snippets/event-listener.ts

@@ -20,6 +20,60 @@ subscription.onObjects = (objectsEvent) => { console.log("Objects event: ", obje
 subscription.onMessageAction = (messageActionEvent) => { console.log("Message Reaction event: ", messageActionEvent); };
 subscription.onFile = (fileEvent) => { console.log("File event: ", fileEvent); };
 
+// Generic listeners
+subscription.addListener({
+  // Messages
+  message: function (m) {
+    const channelName = m.channel; // Channel on which the message was published
+    const channelGroup = m.subscription; // Channel group or wildcard subscription match (if exists)
+    const pubTT = m.timetoken; // Publish timetoken
+    const msg = m.message; // Message payload
+    const publisher = m.publisher; // Message publisher
+  },
+  // Presence
+  // requires a subscription with presence
+  presence: function (p) {
+    const action = p.action; // Can be join, leave, timeout, state-change, or interval
+    const channelName = p.channel; // Channel to which the message belongs
+    const channelGroup = p.subscription; //  Channel group or wildcard subscription match, if any
+    const publishTime = p.timestamp; // Publish timetoken
+    const timetoken = p.timetoken; // Current timetoken
+  },
+  // Signals
+  signal: function (s) {
+    const channelName = s.channel; // Channel to which the signal belongs
+    const channelGroup = s.subscription; // Channel group or wildcard subscription match, if any
+    const pubTT = s.timetoken; // Publish timetoken
+    const msg = s.message; // Payload
+    const publisher = s.publisher; // Message publisher
+  },
+  // App Context
+  objects: (objectEvent) => {
+    const channel = objectEvent.channel; // Channel to which the event belongs
+    const channelGroup = objectEvent.subscription; // Channel group
+    const timetoken = objectEvent.timetoken; // Event timetoken
+    const event = objectEvent.message.data.type; // Event name
+  },
+  // Message Actions
+  messageAction: function (ma) {
+    const channelName = ma.channel; // Channel to which the message belongs
+    const publisher = ma.data.uuid; // Message publisher
+    const event = ma.event; // Message action added or removed
+    const type = ma.data.type; // Message action type
+    const value = ma.data.value; // Message action value
+    const messageTimetoken = ma.data.messageTimetoken; // Timetoken of the original message
+    const actionTimetoken = ma.data.actionTimetoken; // Timetoken of the message action
+  },
+  // File Sharing
+  file: function (event) {
+    const channelName = event.channel; // Channel to which the file belongs
+    const channelGroup = event.subscription; // Channel group or wildcard subscription match (if exists)
+    const publisher = event.publisher; // File publisher
+    const timetoken = event.timetoken; // Event timetoken
+    const message = event.message; // Optional message attached to the file
+  }
+});
+
 // snippet.end
 
 // snippet.AddConnectionStatusListener