From 8dd0de6b3086c04b0a68e728a1b8eb1cfadca3e3 Mon Sep 17 00:00:00 2001
From: Kai Salmen <kai.salmen@typefox.io>
Date: Tue, 7 Nov 2023 16:55:42 +0100
Subject: [PATCH] Intercept workspace create requests and create a new model
 for the editor

---
 .../examples/src/common/client-commons.ts     | 23 +++++++++++++++++--
 .../examples/src/json/server/json-server.ts   | 20 +++++++++++++++-
 2 files changed, 40 insertions(+), 3 deletions(-)

diff --git a/packages/examples/src/common/client-commons.ts b/packages/examples/src/common/client-commons.ts
index 240040784..d90c57b28 100644
--- a/packages/examples/src/common/client-commons.ts
+++ b/packages/examples/src/common/client-commons.ts
@@ -12,12 +12,13 @@ import getKeybindingsServiceOverride from '@codingame/monaco-vscode-keybindings-
 import getThemeServiceOverride from '@codingame/monaco-vscode-theme-service-override';
 import getTextmateServiceOverride from '@codingame/monaco-vscode-textmate-service-override';
 import { initServices, MonacoLanguageClient } from 'monaco-languageclient';
-import { CloseAction, ErrorAction, MessageTransports } from 'vscode-languageclient';
+import { ApplyWorkspaceEditParams, CloseAction, ErrorAction, MessageTransports } from 'vscode-languageclient';
 import { WebSocketMessageReader, WebSocketMessageWriter, toSocket } from 'vscode-ws-jsonrpc';
+import { CreateFile } from 'vscode-languageserver-types';
 import { Uri } from 'vscode';
 
 export const createLanguageClient = (transports: MessageTransports): MonacoLanguageClient => {
-    return new MonacoLanguageClient({
+    const client = new MonacoLanguageClient({
         name: 'Sample Language Client',
         clientOptions: {
             // use a language id as a document selector
@@ -35,6 +36,24 @@ export const createLanguageClient = (transports: MessageTransports): MonacoLangu
             }
         }
     });
+
+    // intercept workspace create requests and create a new model for the editor
+    client.onRequest('workspace/applyEdit', async (params: ApplyWorkspaceEditParams) => {
+        const workspaceEdit = params.edit;
+        if (workspaceEdit.documentChanges) {
+            for (const dc of workspaceEdit.documentChanges) {
+                const cf = dc as CreateFile;
+                if (cf.kind === 'create') {
+                    console.log(cf);
+                    const uri = Uri.parse(cf.uri);
+                    const modelRef = await createModelReference(uri, '');
+                    modelRef.object.setLanguageId('json');
+                }
+            }
+        }
+    });
+
+    return client;
 };
 
 export const createUrl = (hostname: string, port: number, path: string, searchParams: Record<string, any> = {}, secure: boolean = location.protocol === 'https:'): string => {
diff --git a/packages/examples/src/json/server/json-server.ts b/packages/examples/src/json/server/json-server.ts
index 931ed72ce..a334c0f2a 100644
--- a/packages/examples/src/json/server/json-server.ts
+++ b/packages/examples/src/json/server/json-server.ts
@@ -62,6 +62,7 @@ export class JsonServer {
                 }
             };
         });
+
         this.connection.onCodeAction(params =>
             this.codeAction(params)
         );
@@ -94,8 +95,25 @@ export class JsonServer {
         );
     }
 
-    start() {
+    async start() {
         this.connection.listen();
+
+        // Create a file after language server is started
+        setTimeout(async () => {
+            await this.connection.workspace.applyEdit({
+                edit: {
+                    documentChanges: [
+                        {
+                            kind: 'create',
+                            uri: '/workspace/tester.json',
+                            options: {
+                                overwrite: true
+                            }
+                        }
+                    ]
+                }
+            });
+        }, 2000);
     }
 
     protected getFoldingRanges(params: FoldingRangeParams): FoldingRange[] {