remember what extension were proposed

to avoid spamming the user we remember what extension in what version trigger the status bar indication. that combination won't trigger again for 28dys

src/vs/workbench/parts/extensions/electron-browser/extensionsWidgets.ts

@@ -5,6 +5,7 @@
 
 import nls = require('vs/nls');
 import Severity from 'vs/base/common/severity';
+import {forEach} from 'vs/base/common/collections';
 import errors = require('vs/base/common/errors');
 import dom = require('vs/base/browser/dom');
 import lifecycle = require('vs/base/common/lifecycle');
@@ -13,6 +14,7 @@ import statusbar = require('vs/workbench/browser/parts/statusbar/statusbar');
 import { IPluginService, IPluginStatus } from 'vs/platform/plugins/common/plugins';
 import { IInstantiationService } from 'vs/platform/instantiation/common/instantiation';
 import { IMessageService, CloseAction } from 'vs/platform/message/common/message';
+import { IStorageService, StorageScope } from 'vs/platform/storage/common/storage';
 import { UninstallAction } from 'vs/workbench/parts/extensions/electron-browser/extensionsActions';
 import { IQuickOpenService } from 'vs/workbench/services/quickopen/common/quickOpenService';
 import { IExtensionsService, IGalleryService, IExtension, IExtensionTipsService } from 'vs/workbench/parts/extensions/common/extensions';
@@ -87,15 +89,31 @@ export class ExtensionsStatusbarItem implements statusbar.IStatusbarItem {
 
 export class ExtensionTipsStatusbarItem implements statusbar.IStatusbarItem {
 
+	private static _dontSuggestAgainTimeout = 1000 * 60 * 60 * 24 * 28; // 4 wks
+
 	private _domNode: HTMLElement;
 	private _label: OcticonLabel;
-	private _prevTips: IExtension[] = [];
 
 	constructor(
 		@IQuickOpenService private _quickOpenService: IQuickOpenService,
-		@IExtensionTipsService private _extensionTipsService: IExtensionTipsService
+		@IExtensionTipsService private _extensionTipsService: IExtensionTipsService,
+		@IStorageService private _storageService: IStorageService
 	) {
 
+		const previousTips = <{ [id: string]: number }>JSON.parse(this._storageService.get('extensionsAssistant/tips', StorageScope.GLOBAL, '{}'));
+
+		// forget previous tips after 28 days
+		const now = Date.now();
+		forEach(previousTips, (entry, rm) => {
+			if (now - entry.value > ExtensionTipsStatusbarItem._dontSuggestAgainTimeout) {
+				rm();
+			}
+		});
+
+		function extid(ext: IExtension): string {
+			return `${ext.publisher}.${ext.name}@${ext.version}`;
+		};
+
 		this._extensionTipsService.onDidChangeTips(tips => {
 
 			if (tips.length === 0) {
@@ -106,17 +124,15 @@ export class ExtensionTipsStatusbarItem implements statusbar.IStatusbarItem {
 			// check for new tips
 			let hasNewTips = false;
 			for (let tip of tips) {
-				if (this._prevTips.indexOf(tip) < 0) {
-					this._prevTips.push(tip);
+				const id = extid(tip);
+				if (!previousTips[id]) {
+					previousTips[id] = Date.now();
 					hasNewTips = true;
 				}
 			}
 			if (hasNewTips) {
 				dom.addClass(this._domNode, 'active');
-			}
-			// only keep 10 tips
-			while (this._prevTips.length > 10) {
-				this._prevTips.shift();
+				this._storageService.store('extensionsAssistant/tips', JSON.stringify(previousTips), StorageScope.GLOBAL);
 			}
 		});
 	}

src/vs/workbench/parts/extensions/electron-browser/extensionsWorkbenchExtension.ts

@@ -43,6 +43,9 @@ export class ExtensionsWorkbenchExtension implements IWorkbenchContribution {
 			this.install(options.extensionsToInstall).done(null, errors.onUnexpectedError);
 		}
 
+		// add service
+		instantiationService.addSingleton(IExtensionTipsService, this.instantiationService.createInstance(ExtensionTipsService));
+
 		const extensionsCategory = nls.localize('extensionsCategory', "Extensions");
 		const actionRegistry = (<wbaregistry.IWorkbenchActionRegistry> platform.Registry.as(wbaregistry.Extensions.WorkbenchActions));
 		actionRegistry.registerWorkbenchAction(new SyncActionDescriptor(ListExtensionsAction, ListExtensionsAction.ID, ListExtensionsAction.LABEL), extensionsCategory);
@@ -82,7 +85,6 @@ export class ExtensionsWorkbenchExtension implements IWorkbenchContribution {
 			);
 
 			// add extension tips services
-			instantiationService.addSingleton(IExtensionTipsService, this.instantiationService.createInstance(ExtensionTipsService));
 			actionRegistry.registerWorkbenchAction(new SyncActionDescriptor(ListSuggestedExtensionsAction, ListSuggestedExtensionsAction.ID, ListSuggestedExtensionsAction.LABEL), extensionsCategory);
 
 			(<IQuickOpenRegistry>platform.Registry.as(Extensions.Quickopen)).registerQuickOpenHandler(