fix: schedule cache cleanup when tiles are evicted (#3453)

Author: kylecorry31

app/src/main/java/com/kylecorry/trail_sense/shared/map_layers/tiles/infrastructure/persistance/CachedTileCleanupWorker.kt

@@ -0,0 +1,37 @@
+package com.kylecorry.trail_sense.shared.map_layers.tiles.infrastructure.persistance
+
+import android.content.Context
+import androidx.work.CoroutineWorker
+import androidx.work.WorkerParameters
+import com.kylecorry.andromeda.background.IOneTimeTaskScheduler
+import com.kylecorry.andromeda.background.OneTimeTaskSchedulerFactory
+
+class CachedTileCleanupWorker(
+    private val context: Context,
+    params: WorkerParameters
+) : CoroutineWorker(context, params) {
+
+    override suspend fun doWork(): Result {
+        return try {
+            CachedTileRepo.getInstance(context).clean()
+            Result.success()
+        } catch (e: Exception) {
+            Result.failure()
+        }
+    }
+
+    companion object {
+        private const val UNIQUE_ID = 91420833
+
+        private fun getScheduler(context: Context): IOneTimeTaskScheduler {
+            return OneTimeTaskSchedulerFactory(context.applicationContext).deferrable(
+                CachedTileCleanupWorker::class.java,
+                UNIQUE_ID
+            )
+        }
+
+        fun start(context: Context) {
+            getScheduler(context).start()
+        }
+    }
+}

app/src/main/java/com/kylecorry/trail_sense/shared/map_layers/tiles/infrastructure/persistance/PersistentTileCache.kt

@@ -13,8 +13,9 @@ import java.util.UUID
 
 class PersistentTileCache(context: Context) {
 
-    private val repo = CachedTileRepo.getInstance(context)
-    private val files = CacheFileSystem(context)
+    private val appContext = context.applicationContext
+    private val repo = CachedTileRepo.getInstance(appContext)
+    private val files = CacheFileSystem(appContext)
     private val imageSaver = ImageSaver()
 
     suspend fun getOrPut(key: String, tile: Tile, producer: suspend () -> Bitmap): Bitmap = onIO {
@@ -39,6 +40,7 @@ class PersistentTileCache(context: Context) {
         val totalSize = repo.getTotalSizeBytes()
         if (totalSize > MAX_CACHE_SIZE_BYTES) {
             repo.deleteLeastRecentlyUsed(EVICTION_COUNT)
+            CachedTileCleanupWorker.start(appContext)
         }
 
         bitmap