JS: Move JavaScript to commandbar subdirectory

assets/commandbar/js/commandExecutor.js

@@ -0,0 +1,57 @@
+import { SetOptionHandler } from "./setHandler.js";
+
+export class CommandExecutor {
+    commandBar;
+    #history = [];
+    #handlers = new Map();
+
+    constructor(commandBar) {
+        this.commandBar = commandBar;
+        console.log(this.#handlers);
+        this.addHandler(new SetOptionHandler());
+        console.log(this.#handlers);
+    }
+
+    addHandler(handler) {
+        this.#handlers.set(handler.name, handler);
+    }
+
+    executeCommand(command) {
+        this.appendCommandToHistory(command);
+
+        const handler = this.#handlerForCommand(command);
+        if (!handler) {
+            throw new Error(`No handler for '${command.verb.valueOf()}' command`);
+        }
+
+        let result;
+        try {
+            result = handler.execute(command, this.commandBar);
+        } catch (e) {
+            result = null;
+        }
+
+        if (result !== undefined && !result) {
+            console.error(`Command failed: ${command}`);
+        }
+    }
+
+    #handlerForCommand(command) {
+        const verb = command.verb.valueOf();
+        return this.#handlers.get(verb);
+    }
+
+    // MARK: History
+
+    get historyLength() {
+        return this.#history.length;
+    }
+
+    appendCommandToHistory(command) {
+        this.#history.push(command);
+    }
+
+    commandAtHistoryIndex(index) {
+        return this.#history[index];
+    }
+}