[vscode] No error message if vscode.open command is invoked with reso…

…urce that doesn't exist #5667

Signed-off-by: Victor Rubezhny <vrubezhny@redhat.com>

packages/plugin-ext-vscode/src/browser/plugin-vscode-commands-contribution.ts

@@ -41,6 +41,8 @@ import { DiffService } from '@theia/workspace/lib/browser/diff-service';
 import { MonacoEditor } from '@theia/monaco/lib/browser/monaco-editor';
 import { inject, injectable } from 'inversify';
 import URI from 'vscode-uri';
+import { FileSystem, FileStat } from '@theia/filesystem/lib/common';
+import { MessageClient, MessageType } from '@theia/core/lib/common';
 
 export namespace VscodeCommands {
     export const OPEN: Command = {
@@ -82,6 +84,10 @@ export class PluginVscodeCommandsContribution implements CommandContribution {
     protected readonly quickOpen: PrefixQuickOpenService;
     @inject(WorkspaceService)
     protected readonly workspaceService: WorkspaceService;
+    @inject(FileSystem)
+    protected readonly fileSystem: FileSystem;
+    @inject(MessageClient)
+    protected readonly messages: MessageClient;
 
     registerCommands(commands: CommandRegistry): void {
         commands.registerCommand(VscodeCommands.OPEN, {
@@ -90,22 +96,30 @@ export class PluginVscodeCommandsContribution implements CommandContribution {
                 if (!resource) {
                     throw new Error(`${VscodeCommands.OPEN.id} command requires at least URI argument.`);
                 }
+
                 if (!URI.isUri(resource)) {
                     throw new Error(`Invalid argument for ${VscodeCommands.OPEN.id} command with URI argument. Found ${resource}`);
                 }
 
-                let options: TextDocumentShowOptions | undefined;
-                if (typeof columnOrOptions === 'number') {
-                    options = {
-                        viewColumn: columnOrOptions
-                    };
-                } else if (columnOrOptions) {
-                    options = {
-                        ...columnOrOptions
-                    };
+                const stat = await this.fileSystem.getFileStat(new TheiaURI(resource).toString());
+                if (stat && !stat.isDirectory) {
+                    await this.openEditor(resource, columnOrOptions);
+                } else {
+                    const uri = new TheiaURI(resource);
+                    const msg = `Unable to open "${uri}": <p>File not found!`;
+                    this.messages.showMessage({ type: MessageType.Error, text: msg, actions: ['CREATE'] })
+                        .then(res => {
+                            if (res === 'CREATE') {
+                                this.getOrCreateDirectory(uri.parent).then(parent => {
+                                    if (parent) {
+                                        this.fileSystem.createFile(resource.toString()).then(async () => {
+                                            await this.openEditor(resource, columnOrOptions);
+                                        });
+                                    }
+                                });
+                            }
+                        });
                 }
-                const editorOptions = DocumentsMainImpl.toEditorOpenerOptions(this.shell, options);
-                await open(this.openerService, new TheiaURI(resource), editorOptions);
             }
         });
 
@@ -378,4 +392,29 @@ export class PluginVscodeCommandsContribution implements CommandContribution {
         // see https://github.com/microsoft/vscode/blob/master/src/vs/workbench/api/common/extHostApiCommands.ts
     }
 
+    protected async openEditor(uri: URI, columnOrOptions?: ViewColumn | TextDocumentShowOptions): Promise<object | undefined> {
+        let options: TextDocumentShowOptions | undefined;
+        if (typeof columnOrOptions === 'number') {
+            options = {
+                viewColumn: columnOrOptions
+            };
+        } else if (columnOrOptions) {
+            options = {
+                ...columnOrOptions
+            };
+        }
+        const editorOptions = DocumentsMainImpl.toEditorOpenerOptions(this.shell, options);
+        return open(this.openerService, new TheiaURI(uri), editorOptions);
+    }
+
+    protected async getOrCreateDirectory(uri: TheiaURI): Promise<FileStat | undefined> {
+        const stat = await this.fileSystem.getFileStat(uri.toString());
+        if (stat) {
+            if (stat.isDirectory) {
+                return stat;
+            }
+            return this.getOrCreateDirectory(uri.parent);
+        }
+        return this.fileSystem.createFolder(uri.toString());
+    }
 }