Sync only while the app is open.

README.md

@@ -10,7 +10,7 @@ The gear icon opens **Car**. A new install already has the server address filled
 
 `http://sync.sleepingliongames.com:27017`
 
-**Sync on its own** sends a save right away, checks about every 30 seconds while the app is open, and about every 15 minutes while it is closed. **Sync now** sends every car on the phone.
+**Sync on its own** sends a save right away and checks about every 30 seconds while the app is open. It stays quiet while the app is closed. **Sync now** sends every car on the phone.
 
 Each car has its own token, shown on the **Car** screen. **Share token** sends that string to another phone. On the other phone, paste it under **Add a car from a token**. That phone then syncs that car. A different car gets a different token.
 

app/build.gradle.kts

@@ -70,7 +70,6 @@ dependencies {
     implementation(libs.androidx.room.runtime)
     implementation(libs.androidx.room.ktx)
     implementation(libs.kotlinx.coroutines.android)
-    implementation(libs.androidx.work)
     ksp(libs.androidx.room.compiler)
     debugImplementation(libs.androidx.compose.ui.tooling)
     testImplementation(libs.junit)

app/src/main/java/com/racingapp/pitlog/RacingApp.kt

@@ -18,8 +18,7 @@ open class RacingApp : Application() {
         val dao = AppDatabase.create(this).raceDao()
         val preferences = SyncPreferences(this)
         runBlocking(Dispatchers.IO) { ensureCars(dao, preferences) }
-        val sync = PitSync(this, dao, preferences)
+        val sync = PitSync(dao, preferences)
         repository = Repository(dao, sync, preferences)
-        sync.schedule()
     }
 }

app/src/main/java/com/racingapp/pitlog/data/PitSync.kt

@@ -1,17 +1,10 @@
 package com.racingapp.pitlog.data
 
-import android.content.Context
-import androidx.work.Constraints
-import androidx.work.ExistingPeriodicWorkPolicy
-import androidx.work.NetworkType
-import androidx.work.PeriodicWorkRequestBuilder
-import androidx.work.WorkManager
 import java.net.HttpURLConnection
 import java.net.URL
 import java.time.LocalTime
 import java.time.format.DateTimeFormatter
 import java.util.UUID
-import java.util.concurrent.TimeUnit
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.SupervisorJob
@@ -23,10 +16,7 @@ import org.json.JSONObject
 
 class SyncException(message: String) : Exception(message)
 
-private const val WORK_NAME = "pitlog-sync"
-
 class PitSync(
-    private val appContext: Context,
     private val dao: RaceDao,
     private val preferences: SyncPreferences,
 ) {
@@ -39,30 +29,10 @@ class PitSync(
 
     fun saveAddress(address: String) {
         preferences.address = address.trim().trimEnd('/')
-        schedule()
     }
 
     fun setAutomatic(enabled: Boolean) {
         preferences.automatic = enabled
-        schedule()
-    }
-
-    fun schedule() {
-        try {
-            val manager = WorkManager.getInstance(appContext)
-            if (!preferences.automatic || preferences.address.isBlank()) {
-                manager.cancelUniqueWork(WORK_NAME)
-                return
-            }
-            val request = PeriodicWorkRequestBuilder<SyncWorker>(15, TimeUnit.MINUTES)
-                .setConstraints(
-                    Constraints.Builder().setRequiredNetworkType(NetworkType.CONNECTED).build(),
-                )
-                .build()
-            manager.enqueueUniquePeriodicWork(WORK_NAME, ExistingPeriodicWorkPolicy.UPDATE, request)
-        } catch (_: Exception) {
-            // Unit tests do not start WorkManager.
-        }
     }
 
     fun launchAutomatic() {

app/src/main/java/com/racingapp/pitlog/data/SyncWorker.kt

@@ -1,17 +0,0 @@
-package com.racingapp.pitlog.data
-
-import android.content.Context
-import androidx.work.CoroutineWorker
-import androidx.work.WorkerParameters
-import com.racingapp.pitlog.RacingApp
-
-class SyncWorker(
-    context: Context,
-    params: WorkerParameters,
-) : CoroutineWorker(context, params) {
-    override suspend fun doWork(): Result {
-        val app = applicationContext as? RacingApp ?: return Result.success()
-        app.repository.syncAutomatic()
-        return Result.success()
-    }
-}

app/src/main/java/com/racingapp/pitlog/ui/settings/SettingsScreen.kt

@@ -286,7 +286,7 @@ fun SettingsScreen(onBack: () -> Unit) {
                 }
                 SectionLabel("Server")
                 Text(
-                    "This is the Pelican address. Every car on this phone uses it. Sync on its own sends each save right away, checks every half minute while the app is open, and about every 15 minutes while it is closed.",
+                    "This is the Pelican address. Every car on this phone uses it. Sync on its own sends each save right away and checks every half minute while the app is open.",
                     color = MaterialTheme.colorScheme.onSurfaceVariant,
                 )
                 Row(

gradle/libs.versions.toml

@@ -9,7 +9,6 @@ lifecycle = "2.11.0"
 activity = "1.12.4"
 core = "1.19.1"
 coroutines = "1.10.1"
-work = "2.10.1"
 junit = "4.13.2"
 robolectric = "4.16"
 androidxTestCore = "1.6.1"
@@ -32,7 +31,6 @@ androidx-room-runtime = { group = "androidx.room", name = "room-runtime", versio
 androidx-room-ktx = { group = "androidx.room", name = "room-ktx", version.ref = "room" }
 androidx-room-compiler = { group = "androidx.room", name = "room-compiler", version.ref = "room" }
 kotlinx-coroutines-android = { group = "org.jetbrains.kotlinx", name = "kotlinx-coroutines-android", version.ref = "coroutines" }
-androidx-work = { group = "androidx.work", name = "work-runtime-ktx", version.ref = "work" }
 junit = { group = "junit", name = "junit", version.ref = "junit" }
 androidx-compose-ui-test-junit4 = { group = "androidx.compose.ui", name = "ui-test-junit4" }
 androidx-test-core = { group = "androidx.test", name = "core", version.ref = "androidxTestCore" }