Add Connection String Execute Step for SQL Bindings (#19293)

* add execute step

* nit comment

* edit param docs

* address comments

* ensure the user has the installs the latest version

extensions/sql-bindings/src/createNewProject/addConnectionStringStep.ts

@@ -0,0 +1,41 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { AzureWizardExecuteStep, IActionContext } from '@microsoft/vscode-azext-utils';
+import { IConnectionInfo } from 'vscode-mssql';
+import * as azureFunctionsUtils from '../common/azureFunctionsUtils';
+
+/**
+ * This execute step is used to add a connection string to the local.settings.json file when creating a new Azure Functions project
+ * and is needed due to vscode restarting the extension host after the user chooses to open project in new window or current window 
+ * through the createFunction API call for vscode-azurefunctions
+ * @param projectFolder The folder containing the Azure Functions project
+ * @param connectionInfo The connection info to use when creating the connection string
+ * @param connectionStringSettingName the name of the connection string setting
+ * @returns AzureWizardExecuteStep to be used in the createFunction API call
+ */
+export function createAddConnectionStringStep(projectFolder: string, connectionInfo: IConnectionInfo, connectionStringSettingName?: string): AzureWizardExecuteStep<IActionContext> {
+	return new class AzureWizardExecuteStep {
+		// priority number is set to be lower than OpenFolderStep in vscode-azurefunctions
+		// https://github.com/microsoft/vscode-azurefunctions/blob/main/src/commands/createNewProject/OpenFolderStep.ts#L11
+		public priority: number = 240;
+
+		public async execute(): Promise<void> {
+			let settingsFile = await azureFunctionsUtils.getSettingsFile(projectFolder);
+			if (!settingsFile) {
+				return;
+			}
+			let connectionString = await azureFunctionsUtils.promptConnectionStringPasswordAndUpdateConnectionString(connectionInfo, settingsFile);
+			if (!connectionString) {
+				return;
+			}
+			void azureFunctionsUtils.addConnectionStringToConfig(connectionString, projectFolder, connectionStringSettingName);
+		}
+
+		public shouldExecute(): boolean {
+			return true;
+		}
+	};
+}