[Notif] Add PromotedNotificationUi flag refactor util class.

/*

 * Copyright (C) 2024 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.android.systemui.statusbar.notification.promoted

import android.app.Flags

import com.android.systemui.flags.FlagToken

import com.android.systemui.flags.RefactorFlagUtils

/** Helper for reading or using the promoted ongoing notifications UI flag state. */

@Suppress("NOTHING_TO_INLINE")

object PromotedNotificationUi {

    /** The aconfig flag name */

    const val FLAG_NAME = Flags.FLAG_UI_RICH_ONGOING

    /** A token used for dependency declaration */

    val token: FlagToken

        get() = FlagToken(FLAG_NAME, isEnabled)

    /** Is the refactor enabled */

    @JvmStatic

    inline val isEnabled

        get() = Flags.uiRichOngoing()

    /**

     * Called to ensure code is only run when the flag is enabled. This protects users from the

     * unintended behaviors caused by accidentally running new logic, while also crashing on an eng

     * build to ensure that the refactor author catches issues in testing.

     */

    @JvmStatic

    inline fun isUnexpectedlyInLegacyMode() =

        RefactorFlagUtils.isUnexpectedlyInLegacyMode(isEnabled, FLAG_NAME)

    /**

     * Called to ensure code is only run when the flag is disabled. This will throw an exception if

     * the flag is not enabled to ensure that the refactor author catches issues in testing.

     * Caution!! Using this check incorrectly will cause crashes in nextfood builds!

     */

    @JvmStatic

    inline fun assertInNewMode() = RefactorFlagUtils.assertInNewMode(isEnabled, FLAG_NAME)

    /**

     * Called to ensure code is only run when the flag is disabled. This will throw an exception if

     * the flag is enabled to ensure that the refactor author catches issues in testing.

     */

    @JvmStatic

    inline fun assertInLegacyMode() = RefactorFlagUtils.assertInLegacyMode(isEnabled, FLAG_NAME)

}