feat: implement background fetch worker (cont.)

app/src/main/java/io/github/kabirnayeem99/islamqaorg/domain/useCase/FetchAndSavePeriodically.kt

@@ -0,0 +1,30 @@
+package io.github.kabirnayeem99.islamqaorg.domain.useCase
+
+import android.content.Context
+import androidx.work.Constraints
+import androidx.work.NetworkType
+import androidx.work.PeriodicWorkRequest
+import androidx.work.WorkManager
+import io.github.kabirnayeem99.islamqaorg.data.workers.BackgroundQAListFetcherWorker
+import javax.inject.Inject
+
+class FetchAndSavePeriodically
+@Inject constructor(private val appContext: Context) {
+
+    operator suspend fun invoke() {
+        schedulePeriodicSync(appContext)
+    }
+
+    suspend fun schedulePeriodicSync(context: Context) {
+        val constraints =
+            Constraints.Builder().setRequiredNetworkType(NetworkType.CONNECTED).build()
+
+        val periodicRequest = PeriodicWorkRequest.Builder(
+            BackgroundQAListFetcherWorker::class.java, SYNC_INTERVAL_HOURS, TimeUnit.HOURS
+        ).setConstraints(constraints).addTag(WORK_TAG).build()
+
+        WorkManager.getInstance(context).enqueueUniquePeriodicWork(
+            WORK_TAG, ExistingPeriodicWorkPolicy.KEEP, periodicRequest
+        )
+    }
+}