Introduce connection API (#598)

Including getCurrentConnection, getActiveConnections, and getCredentials

src/sql/parts/connection/common/connectionStatusManager.ts

@@ -209,4 +209,13 @@ export class ConnectionStatusManager {
 		}
 		return providerId;
 	}
+
+	/**
+	 * Get a list of the active connection profiles managed by the status manager
+	*/
+	public getActiveConnectionProfiles(): ConnectionProfile[] {
+		let profiles = Object.values(this._connections).map((connectionInfo: ConnectionManagementInfo) => connectionInfo.connectionProfile);
+		// Remove duplicate profiles that may be listed multiple times under different URIs by filtering for profiles that don't have the same ID as an earlier profile in the list
+		return profiles.filter((profile, index) => profiles.findIndex(otherProfile => otherProfile.id === profile.id) === index);
+	}
 }