commonMain.app.cash.zipline.loader.FreshnessChecker.kt Maven / Gradle / Ivy
/*
* Copyright (C) 2023 Cash App
*
* 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 app.cash.zipline.loader
import app.cash.zipline.ZiplineManifest
/**
* Decides whether a locally-cached application is fresh enough to use at the current time.
*
* This is unused for downloaded applications, which are considered to be fresh by definition.
*/
interface FreshnessChecker {
/**
* Returns true if [manifest] is eligible to be used.
*
* @param freshAtEpochMs the time that [manifest] was fetched from the server by this client.
* This could be significantly newer than the time the application was built.
*/
fun isFresh(
manifest: ZiplineManifest,
freshAtEpochMs: Long,
): Boolean
}
/** A FreshnessChecker that never loads locally-cached applications. */
object DefaultFreshnessCheckerNotFresh : FreshnessChecker {
override fun isFresh(manifest: ZiplineManifest, freshAtEpochMs: Long): Boolean {
return false
}
}