Use EventTarget

Getting torrent info from servers now uses Events
instead of magic callbacks.

js/trdom_servermanager.js

@@ -1,6 +1,6 @@
 "use strict";
 
-class trdom_servermanager {
+class trdom_servermanager extends EventTarget {
 
     #logcb;
     #log(loglevel, msg) {
@@ -14,7 +14,12 @@ class trdom_servermanager {
         return this.#servers;
     }
 
-    #registerServer;
+    #registerServer = function(name, initdata) {
+        let server = new trserver(initdata, function(msg) {this.#logcb(`server:${name}`, 6, msg);}.bind(this));
+        this.#servers[name] = server;
+        server.addEventListener('torrent-update', this);
+        server.refreshTorrentList();
+    }
 
     #loadcb;
     #loadServers() {
@@ -49,12 +54,38 @@ class trdom_servermanager {
     }
 
     constructor (loadcb = null, savecb = null, logcb = null, registerServer = null) {
+        super();
         this.#loadcb = loadcb;
         this.#savecb = savecb;
         this.#logcb = logcb
 
-        this.#registerServer = registerServer;
+        //this.#registerServer = registerServer;
 
         //this.#servers = this.#loadServers();
     }
+
+    handleEvent(e) {
+        this.#log(6, `Handling event of type ${e.type}`);
+        switch (e.type) {
+        case 'torrent-update':
+            for (const [srv, server] of Object.entries(this.#servers)) {
+                if (e.target == server) {
+                    let newEvent = new CustomEvent('torrent-update', {
+                        'detail': {
+                            'torrentHash': e.detail.torrentHash,
+                            'torrentInfo': e.detail.torrentInfo,
+                            'serverName': srv
+                        }
+                    });
+                    this.dispatchEvent(newEvent);
+                    return;
+                }
+            }
+            this.#log(2, `Got update event for unknown server:\n${JSON.stringify(e.detail)}`);
+            break;
+        default:
+            this.#log(5, `Event type ${e.type} not supported`);
+            break;
+        }
+    }
 }