Creating a new database project, project items

* can create, open, and close sqlproj files
* can add sql objects to projects

extensions/sql-database-projects/src/models/dataSources/dataSources.ts

@@ -13,13 +13,21 @@ import { SqlConnectionDataSource } from './sqlConnectionStringSource';
 export abstract class DataSource {
 	public name: string;
 	public abstract get type(): string;
-	public abstract get friendlyName(): string;
+	public abstract get typeFriendlyName(): string;
 
 	constructor(name: string) {
 		this.name = name;
 	}
 }
 
+export class NoDataSourcesFileError extends Error {
+	constructor(message?: string) {
+		super(message);
+		Object.setPrototypeOf(this, new.target.prototype);
+		this.name = NoDataSourcesFileError.name;
+	}
+}
+
 /**
  * parses the specified file to load DataSource objects
  */
@@ -30,7 +38,8 @@ export async function load(dataSourcesFilePath: string): Promise<DataSource[]> {
 		fileContents = await fs.readFile(dataSourcesFilePath);
 	}
 	catch (err) {
-		throw new Error(constants.noDataSourcesFile);
+		// TODO: differentiate between file not existing and other types of failures; need to know whether to prompt to create new
+		throw new NoDataSourcesFileError(constants.noDataSourcesFile);
 	}
 
 	const rawJsonContents = JSON.parse(fileContents.toString());

extensions/sql-database-projects/src/models/dataSources/sqlConnectionStringSource.ts

@@ -21,7 +21,7 @@ export class SqlConnectionDataSource extends DataSource {
 		return SqlConnectionDataSource.type;
 	}
 
-	public get friendlyName(): string {
+	public get typeFriendlyName(): string {
 		return constants.sqlConnectionStringFriendly;
 	}
 
@@ -42,6 +42,10 @@ export class SqlConnectionDataSource extends DataSource {
 		}
 	}
 
+	public getSetting(settingName: string): string {
+		return this.connectionStringComponents[settingName];
+	}
+
 	public static fromJson(json: DataSourceJson): SqlConnectionDataSource {
 		return new SqlConnectionDataSource(json.name, (json.data as unknown as SqlConnectionDataSourceJson).connectionString);
 	}