Extract remote source provider registry into the vscode.git-base extension (#137656)

extensions/git-base/src/model.ts

@@ -0,0 +1,34 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { EventEmitter, Disposable } from 'vscode';
+import { toDisposable } from './util';
+import { RemoteSourceProvider } from './api/git-base';
+import { IRemoteSourceProviderRegistry } from './remoteProvider';
+
+export class Model implements IRemoteSourceProviderRegistry {
+
+	private remoteSourceProviders = new Set<RemoteSourceProvider>();
+
+	private _onDidAddRemoteSourceProvider = new EventEmitter<RemoteSourceProvider>();
+	readonly onDidAddRemoteSourceProvider = this._onDidAddRemoteSourceProvider.event;
+
+	private _onDidRemoveRemoteSourceProvider = new EventEmitter<RemoteSourceProvider>();
+	readonly onDidRemoveRemoteSourceProvider = this._onDidRemoveRemoteSourceProvider.event;
+
+	registerRemoteSourceProvider(provider: RemoteSourceProvider): Disposable {
+		this.remoteSourceProviders.add(provider);
+		this._onDidAddRemoteSourceProvider.fire(provider);
+
+		return toDisposable(() => {
+			this.remoteSourceProviders.delete(provider);
+			this._onDidRemoveRemoteSourceProvider.fire(provider);
+		});
+	}
+
+	getRemoteProviders(): RemoteSourceProvider[] {
+		return [...this.remoteSourceProviders.values()];
+	}
+}