Modularize code

Split JS into per-class files
Cut parts of trweb class out
Move init code from event handler to constructor

js/trdom_servermanager.js

@@ -0,0 +1,60 @@
+"use strict";
+
+class trdom_servermanager {
+
+    #logcb;
+    #log(loglevel, msg) {
+        if (this.#logcb !== null) {
+            this.#logcb('trdom_servermanager', loglevel, msg);
+        }
+    }
+
+    #servers = {};
+    getServers() {
+        return this.#servers;
+    }
+
+    #registerServer;
+
+    #loadcb;
+    #loadServers() {
+        let serverjson = this.#loadcb('servers');
+        this.#servers = {};
+        if (serverjson == null) {
+            this.#log(4, 'No saved server data found');
+        }
+        else {
+            let serverdata = JSON.parse(serverjson);
+            for (const [key, value] of Object.entries(serverdata)) {
+                this.#registerServer(key, value);
+            }
+            this.#log(5, `Loaded ${Object.keys(this.#servers).length} servers`);
+        }
+    }
+    loadServers() {
+        this.#loadServers();
+    }
+    
+    #savecb;
+    #saveServers() {
+        let serverdata = {};
+        for (const [key, value] of Object.entries(this.#servers)) {
+            serverdata[key] = value.getInstanceData();
+        }
+        this.#log(5, `Saving ${Object.keys(serverdata).length} servers`);
+        this.#savecb('servers', JSON.stringify(serverdata));
+    }
+    saveServers() {
+        this.#saveServers();
+    }
+
+    constructor (loadcb = null, savecb = null, logcb = null, registerServer = null) {
+        this.#loadcb = loadcb;
+        this.#savecb = savecb;
+        this.#logcb = logcb
+
+        this.#registerServer = registerServer;
+
+        //this.#servers = this.#loadServers();
+    }
+}