Regularly analyze database tables to improve index usage.

app/src/main/java/org/thoughtcrime/securesms/service/AnalyzeDatabaseAlarmListener.kt

@@ -0,0 +1,54 @@
+package org.thoughtcrime.securesms.service
+
+import android.content.Context
+import org.thoughtcrime.securesms.dependencies.ApplicationDependencies
+import org.thoughtcrime.securesms.jobs.AnalyzeDatabaseJob
+import org.thoughtcrime.securesms.keyvalue.SignalStore
+import org.thoughtcrime.securesms.util.toMillis
+import java.time.LocalDateTime
+
+/**
+ * Schedules database analysis to happen everyday at 3am.
+ */
+class AnalyzeDatabaseAlarmListener : PersistentAlarmManagerListener() {
+  companion object {
+    @JvmStatic
+    fun schedule(context: Context?) {
+      AnalyzeDatabaseAlarmListener().onReceive(context, getScheduleIntent())
+    }
+  }
+
+  override fun shouldScheduleExact(): Boolean {
+    return true
+  }
+
+  override fun getNextScheduledExecutionTime(context: Context): Long {
+    var nextTime = SignalStore.misc().nextDatabaseAnalysisTime
+
+    if (nextTime == 0L) {
+      nextTime = getNextTime()
+      SignalStore.misc().nextDatabaseAnalysisTime = nextTime
+    }
+
+    return nextTime
+  }
+
+  override fun onAlarm(context: Context, scheduledTime: Long): Long {
+    ApplicationDependencies.getJobManager().add(AnalyzeDatabaseJob())
+
+    val nextTime = getNextTime()
+    SignalStore.misc().nextDatabaseAnalysisTime = nextTime
+
+    return nextTime
+  }
+
+  private fun getNextTime(): Long {
+    return LocalDateTime
+      .now()
+      .plusDays(1)
+      .withHour(3)
+      .withMinute(0)
+      .withSecond(0)
+      .toMillis()
+  }
+}