First commit.

Signed-off-by: Chen Xiao <abigwc@gmail.com>

client/node_modules/langium/lib/lsp/execute-command-handler.js

@@ -0,0 +1,28 @@
+/******************************************************************************
+ * Copyright 2022 TypeFox GmbH
+ * This program and the accompanying materials are made available under the
+ * terms of the MIT License, which is available in the project root.
+ ******************************************************************************/
+import { CancellationToken } from '../utils/cancellation.js';
+export class AbstractExecuteCommandHandler {
+    get commands() {
+        return Array.from(this.registeredCommands.keys());
+    }
+    constructor() {
+        this.registeredCommands = new Map();
+        this.registerCommands(this.createCommandAcceptor());
+    }
+    async executeCommand(name, args, cancelToken = CancellationToken.None) {
+        const command = this.registeredCommands.get(name);
+        if (command) {
+            return command(args, cancelToken);
+        }
+        else {
+            return undefined;
+        }
+    }
+    createCommandAcceptor() {
+        return (name, execute) => this.registeredCommands.set(name, execute);
+    }
+}
+//# sourceMappingURL=execute-command-handler.js.map