Code Layering Accounts (#4882)

* code layering for accounts

* formatting

* formatting

* formatting

src/sql/platform/accounts/common/accountViewModel.ts

@@ -0,0 +1,66 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import * as azdata from 'azdata';
+import { Event, Emitter } from 'vs/base/common/event';
+import { IAccountManagementService } from 'sql/platform/accounts/common/interfaces';
+import { AccountProviderAddedEventParams, UpdateAccountListEventParams } from 'sql/platform/accounts/common/eventTypes';
+
+/**
+ * View model for account dialog
+ */
+export class AccountViewModel {
+	// EVENTING ///////////////////////////////////////////////////////
+	private _addProviderEmitter: Emitter<AccountProviderAddedEventParams>;
+	public get addProviderEvent(): Event<AccountProviderAddedEventParams> { return this._addProviderEmitter.event; }
+
+	private _removeProviderEmitter: Emitter<azdata.AccountProviderMetadata>;
+	public get removeProviderEvent(): Event<azdata.AccountProviderMetadata> { return this._removeProviderEmitter.event; }
+
+	private _updateAccountListEmitter: Emitter<UpdateAccountListEventParams>;
+	public get updateAccountListEvent(): Event<UpdateAccountListEventParams> { return this._updateAccountListEmitter.event; }
+
+	constructor(@IAccountManagementService private _accountManagementService: IAccountManagementService) {
+		// Create our event emitters
+		this._addProviderEmitter = new Emitter<AccountProviderAddedEventParams>();
+		this._removeProviderEmitter = new Emitter<azdata.AccountProviderMetadata>();
+		this._updateAccountListEmitter = new Emitter<UpdateAccountListEventParams>();
+
+		// Register handlers for any changes to the providers or accounts
+		this._accountManagementService.addAccountProviderEvent(arg => this._addProviderEmitter.fire(arg));
+		this._accountManagementService.removeAccountProviderEvent(arg => this._removeProviderEmitter.fire(arg));
+		this._accountManagementService.updateAccountListEvent(arg => this._updateAccountListEmitter.fire(arg));
+	}
+
+	// PUBLIC METHODS //////////////////////////////////////////////////////
+	/**
+	 * Loads an initial list of account providers and accounts from the account management service
+	 * and fires an event after each provider/accounts has been loaded.
+	 *
+	 */
+	public initialize(): Thenable<AccountProviderAddedEventParams[]> {
+		// Load a baseline of the account provider metadata and accounts
+		// 1) Get all the providers from the account management service
+		// 2) For each provider, get the accounts
+		// 3) Build parameters to add a provider and return it
+		return this._accountManagementService.getAccountProviderMetadata()
+			.then(
+				(providers: azdata.AccountProviderMetadata[]) => {
+					const promises = providers.map(provider => {
+						return this._accountManagementService.getAccountsForProvider(provider.id)
+							.then(
+								accounts => <AccountProviderAddedEventParams>{
+									addedProvider: provider,
+									initialAccounts: accounts
+								},
+								() => { /* Swallow failures at getting accounts, we'll just hide that provider */ });
+					});
+					return Promise.all(promises);
+				}, () => {
+					/* Swallow failures and just pretend we don't have any providers */
+					return [];
+				});
+	}
+}