Create status list

Part of #120583

src/vs/workbench/contrib/terminal/browser/terminalStatusList.ts

@@ -0,0 +1,80 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { Emitter, Event } from 'vs/base/common/event';
+import Severity from 'vs/base/common/severity';
+
+export interface ITerminalStatus {
+	id: string;
+	severity: Severity;
+}
+
+export interface ITerminalStatusList {
+	/** Gets the most recent, highest severity status. */
+	readonly primary: ITerminalStatus | undefined;
+	/** Gets all active statues. */
+	readonly statuses: ITerminalStatus[];
+
+	readonly onDidAddStatus: Event<ITerminalStatus>;
+	readonly onDidRemoveStatus: Event<ITerminalStatus>;
+
+	add(status: ITerminalStatus, duration?: number): void;
+	remove(status: ITerminalStatus): void;
+	remove(statusId: string): void;
+	toggle(status: ITerminalStatus, value: boolean): void;
+}
+
+export class TerminalStatusList implements ITerminalStatusList {
+	private readonly _statuses: Map<string, ITerminalStatus> = new Map();
+	private readonly _statusTimeouts: Map<string, number> = new Map();
+
+	private readonly _onDidAddStatus = new Emitter<ITerminalStatus>();
+	get onDidAddStatus(): Event<ITerminalStatus> { return this._onDidAddStatus.event; }
+	private readonly _onDidRemoveStatus = new Emitter<ITerminalStatus>();
+	get onDidRemoveStatus(): Event<ITerminalStatus> { return this._onDidRemoveStatus.event; }
+
+	get primary(): ITerminalStatus | undefined {
+		let result: ITerminalStatus | undefined;
+		for (const s of this._statuses.values()) {
+			if (!result || s.severity > result.severity) {
+				result = s;
+			}
+		}
+		return result;
+	}
+
+	get statuses(): ITerminalStatus[] { return Array.from(this._statuses.values()); }
+
+	add(status: ITerminalStatus, duration?: number) {
+		this._statusTimeouts.delete(status.id);
+		if (duration && duration > 0) {
+			const timeout = window.setTimeout(() => this.remove(status), duration);
+			this._statusTimeouts.set(status.id, timeout);
+		}
+		if (!this._statuses.has(status.id)) {
+			this._statuses.set(status.id, status);
+			this._onDidAddStatus.fire(status);
+		}
+	}
+
+	remove(status: ITerminalStatus): void;
+	remove(statusId: string): void;
+	remove(statusOrId: ITerminalStatus | string): void {
+		const status = typeof statusOrId === 'string' ? this._statuses.get(statusOrId) : statusOrId;
+		// Verify the status is the same as the one passed in
+		if (status && this._statuses.get(status.id)) {
+			this._statuses.delete(status.id);
+			this._onDidRemoveStatus.fire(status);
+		}
+	}
+
+	toggle(status: ITerminalStatus, value: boolean) {
+		if (value) {
+			this.add(status);
+		} else {
+			this.remove(status);
+		}
+	}
+}