Add event handler

eventWatcher.js

@@ -0,0 +1,40 @@
+const db = global.db;
+const { EventEmitter } = require('events');
+const log = require("./logger");
+
+log.info("Starting event watcher...");
+
+const emitter = new EventEmitter();
+
+var lastEventIndex = 0;
+
+async function getLastEventIndex() {
+	const result = await db.query('SELECT EventIndex FROM Events ORDER BY EventIndex DESC LIMIT 1');
+	if (result && result.length > 0) {
+		lastEventIndex = result[0].EventIndex;
+		log.info(`Last event index: ${lastEventIndex}`);
+	}
+}
+
+getLastEventIndex();
+
+async function fetchEvents() {
+	try {
+		const events = await db.query('SELECT * FROM Events WHERE EventIndex > ? ORDER BY EventIndex ASC', [lastEventIndex]);
+		if (events && events.length > 0) {
+			log.debug(`Fetched ${events.length} new event(s)`);
+			events.forEach(event => {
+				emitter.emit('event', event);
+				lastEventIndex = event.EventIndex;
+				log.debug(`Processed event index: ${lastEventIndex}; ${JSON.stringify(event)}`);
+			});
+		}
+	} catch (err) {
+		log.error(`Error fetching events: ${err}`);
+	}
+	setTimeout(fetchEvents, 1000);
+}
+
+fetchEvents();
+
+module.exports = emitter;

index.js

@@ -107,7 +107,9 @@ app.listen(port, (err) => {
 							global.log.error(`Cannot create default user: ${err}`);
 						});
 					}
-			})
+			});
+
+			global.dbEvent = require("./eventWatcher.js");
 		})
 		.catch(err => {
 			global.log.error(`Database connection failed: ${err}`);

package-lock.json

@@ -17,6 +17,7 @@
         "ejs": "^3.1.10",
         "express": "^5.1.0",
         "express-session": "^1.18.2",
+        "express-ws": "^5.0.2",
         "mariadb": "^3.4.5",
         "uhppoted": "^0.8.11"
       }
@@ -807,6 +808,21 @@
       "integrity": "sha512-Tpp60P6IUJDTuOq/5Z8cdskzJujfwqfOTkrwIwj7IRISpnkJnT6SyJ4PCPnGMoFjC9ddhal5KVIYtAt97ix05A==",
       "license": "MIT"
     },
+    "node_modules/express-ws": {
+      "version": "5.0.2",
+      "resolved": "https://registry.npmjs.org/express-ws/-/express-ws-5.0.2.tgz",
+      "integrity": "sha512-0uvmuk61O9HXgLhGl3QhNSEtRsQevtmbL94/eILaliEADZBHZOQUAiHFrGPrgsjikohyrmSG5g+sCfASTt0lkQ==",
+      "license": "BSD-2-Clause",
+      "dependencies": {
+        "ws": "^7.4.6"
+      },
+      "engines": {
+        "node": ">=4.5.0"
+      },
+      "peerDependencies": {
+        "express": "^4.0.0 || ^5.0.0-alpha.1"
+      }
+    },
     "node_modules/file-uri-to-path": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/file-uri-to-path/-/file-uri-to-path-1.0.0.tgz",
@@ -2490,6 +2506,27 @@
       "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==",
       "license": "ISC"
     },
+    "node_modules/ws": {
+      "version": "7.5.10",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.5.10.tgz",
+      "integrity": "sha512-+dbF1tHwZpXcbOJdVOkzLDxZP1ailvSxM6ZweXTegylPny803bFhA+vqBYw4s31NSAk4S2Qz+AKXK9a4wkdjcQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=8.3.0"
+      },
+      "peerDependencies": {
+        "bufferutil": "^4.0.1",
+        "utf-8-validate": "^5.0.2"
+      },
+      "peerDependenciesMeta": {
+        "bufferutil": {
+          "optional": true
+        },
+        "utf-8-validate": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/yallist": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",

package.json

@@ -19,6 +19,7 @@
     "ejs": "^3.1.10",
     "express": "^5.1.0",
     "express-session": "^1.18.2",
+    "express-ws": "^5.0.2",
     "mariadb": "^3.4.5",
     "uhppoted": "^0.8.11"
   }