1 files changed, 90 insertions, 0 deletions
diff --git a/app/src/main/kotlin/com/pitchedapps/frost/services/LocalService.kt b/app/src/main/kotlin/com/pitchedapps/frost/services/LocalService.kt
new file mode 100644
index 00000000..3d66f1ee
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+++ b/app/src/main/kotlin/com/pitchedapps/frost/services/LocalService.kt
@@ -0,0 +1,90 @@
+/*
+ * Copyright 2018 Allan Wang
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.pitchedapps.frost.services
+
+import android.app.job.JobInfo
+import android.app.job.JobParameters
+import android.app.job.JobScheduler
+import android.content.ComponentName
+import android.content.Context
+import android.os.PersistableBundle
+import com.pitchedapps.frost.activities.ImageActivity
+import com.pitchedapps.frost.utils.L
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import java.io.FileFilter
+
+class LocalService : BaseJobService() {
+
+    enum class Flag {
+        PURGE_IMAGE
+    }
+
+    companion object {
+        private const val FLAG = "extra_local_flag"
+
+        /**
+         * Launches a local service with the provided flag
+         */
+        fun schedule(context: Context, flag: Flag): Boolean {
+            val scheduler = context.getSystemService(Context.JOB_SCHEDULER_SERVICE) as JobScheduler
+            val serviceComponent = ComponentName(context, LocalService::class.java)
+            val bundle = PersistableBundle()
+            bundle.putString(FLAG, flag.name)
+
+            val builder = JobInfo.Builder(LOCAL_SERVICE_BASE + flag.ordinal, serviceComponent)
+                .setMinimumLatency(0L)
+                .setExtras(bundle)
+                .setOverrideDeadline(2000L)
+
+            val result = scheduler.schedule(builder.build())
+            if (result <= 0) {
+                L.eThrow("FrostRequestService scheduler failed for ${flag.name}")
+                return false
+            }
+            L.d { "Scheduled ${flag.name}" }
+            return true
+        }
+    }
+
+    override fun onStartJob(params: JobParameters?): Boolean {
+        super.onStartJob(params)
+        val flagString = params?.extras?.getString(FLAG)
+        val flag: Flag = try {
+            Flag.valueOf(flagString!!)
+        } catch (e: Exception) {
+            L.e { "Local service with invalid flag $flagString" }
+            return true
+        }
+        launch {
+            when (flag) {
+                Flag.PURGE_IMAGE -> purgeImages()
+            }
+        }
+        return false
+    }
+
+    private suspend fun purgeImages() {
+        withContext(Dispatchers.IO) {
+            val purge = System.currentTimeMillis() - ImageActivity.PURGE_TIME
+            ImageActivity.cacheDir(this@LocalService)
+                .listFiles(FileFilter { it.isFile && it.lastModified() < purge })
+                ?.forEach { it.delete() }
+        }
+    }
+}