Refactor SQL Binding code over from sql-database-projects (#18674)

* add sql binding prompt / logic

* remove controller and move to extension

* remove unused dependencies

extensions/sql-bindings/src/common/azureFunctionsUtils.ts

@@ -0,0 +1,110 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+import * as fse from 'fs-extra';
+import * as path from 'path';
+import * as vscode from 'vscode';
+import * as utils from './utils';
+import * as constants from './constants';
+import { parseJson } from './parseJson';
+
+/**
+ * Represents the settings in an Azure function project's locawl.settings.json file
+ */
+export interface ILocalSettingsJson {
+	IsEncrypted?: boolean;
+	Values?: { [key: string]: string };
+	Host?: { [key: string]: string };
+	ConnectionStrings?: { [key: string]: string };
+}
+
+/**
+ * copied and modified from vscode-azurefunctions extension
+ * @param localSettingsPath full path to local.settings.json
+ * @returns settings in local.settings.json. If no settings are found, returns default "empty" settings
+ */
+export async function getLocalSettingsJson(localSettingsPath: string): Promise<ILocalSettingsJson> {
+	if (await fse.pathExists(localSettingsPath)) {
+		const data: string = (await fse.readFile(localSettingsPath)).toString();
+		if (/[^\s]/.test(data)) {
+			try {
+				return parseJson(data);
+			} catch (error) {
+				throw new Error(constants.failedToParse(error.message));
+			}
+		}
+	}
+
+	return {
+		IsEncrypted: false // Include this by default otherwise the func cli assumes settings are encrypted and fails to run
+	};
+}
+
+/**
+ * Adds a new setting to a project's local.settings.json file
+ * modified from setLocalAppSetting code from vscode-azurefunctions extension
+ * @param projectFolder full path to project folder
+ * @param key Key of the new setting
+ * @param value Value of the new setting
+ * @returns true if successful adding the new setting, false if unsuccessful
+ */
+export async function setLocalAppSetting(projectFolder: string, key: string, value: string): Promise<boolean> {
+	const localSettingsPath: string = path.join(projectFolder, constants.azureFunctionLocalSettingsFileName);
+	const settings: ILocalSettingsJson = await getLocalSettingsJson(localSettingsPath);
+
+	settings.Values = settings.Values || {};
+	if (settings.Values[key] === value) {
+		// don't do anything if it's the same as the existing value
+		return true;
+	} else if (settings.Values[key]) {
+		const result = await vscode.window.showWarningMessage(constants.settingAlreadyExists(key), { modal: true }, constants.yesString);
+		if (result !== constants.yesString) {
+			// key already exists and user doesn't want to overwrite it
+			return false;
+		}
+	}
+
+	settings.Values[key] = value;
+	await fse.writeJson(localSettingsPath, settings, { spaces: 2 });
+
+	return true;
+}
+
+/**
+ * Gets the Azure Functions project that contains the given file if the project is open in one of the workspace folders
+ * @param fileUri file that the containing project needs to be found for
+ * @returns uri of project or undefined if project couldn't be found
+ */
+export async function getAFProjectContainingFile(fileUri: vscode.Uri): Promise<vscode.Uri | undefined> {
+	// get functions csprojs in the workspace
+	const projectPromises = vscode.workspace.workspaceFolders?.map(f => utils.getAllProjectsInFolder(f.uri, '.csproj')) ?? [];
+	const functionsProjects = (await Promise.all(projectPromises)).reduce((prev, curr) => prev.concat(curr), []).filter(p => isFunctionProject(path.dirname(p.fsPath)));
+
+	// look for project folder containing file if there's more than one
+	if (functionsProjects.length > 1) {
+		// TODO: figure out which project contains the file
+		// the new style csproj doesn't list all the files in the project anymore, unless the file isn't in the same folder
+		// so we can't rely on using that to check
+		console.error('need to find which project contains the file ' + fileUri.fsPath);
+		return undefined;
+	} else if (functionsProjects.length === 0) {
+		throw new Error(constants.noAzureFunctionsProjectsInWorkspace);
+	} else {
+		return functionsProjects[0];
+	}
+}
+
+// Use 'host.json' as an indicator that this is a functions project
+// copied from verifyIsproject.ts in vscode-azurefunctions extension
+export async function isFunctionProject(folderPath: string): Promise<boolean> {
+	return fse.pathExists(path.join(folderPath, constants.hostFileName));
+}
+/**
+ * Adds the required nuget package to the project
+ * @param selectedProjectFile is the users selected project file path
+ */
+export async function addNugetReferenceToProjectFile(selectedProjectFile: string): Promise<void> {
+	await utils.executeCommand(`dotnet add ${selectedProjectFile} package ${constants.sqlExtensionPackageName} --prerelease`);
+}
+