Delete old pings also on startup

lib/app.js

@@ -22,11 +22,13 @@ class App {
     // Setup database instance
     this.database.ensureIndexes(() => {
       this.database.loadGraphPoints(config.graphDuration, () => {
-        if (config.deleteOldPings) {
-          this.database.initOldPingsDeleter()
-        }
-
-        this.database.loadRecords(callback)
+        this.database.loadRecords(() => {
+          if (config.deleteOldPings) {
+            this.database.initOldPingsDelete(callback)
+          } else {
+            callback()
+          }
+        })
       })
     })
   }

lib/database.js

@@ -267,12 +267,18 @@ class Database {
     statement.finalize()
   }
 
-  initOldPingsDeleter () {
-    // Delete old records every hour
-    setInterval(() => this.deleteOldPingRecords(), 3600000)
+  initOldPingsDelete (callback) {
+    // Delete old ping records on startup
+    logger.info('Deleting old ping records..')
+    this.deleteOldPingRecords(() => {
+      // Delete old ping records every hour
+      setInterval(() => this.deleteOldPingRecords(), 3600000)
+
+      callback()
+    })
   }
 
-  deleteOldPingRecords () {
+  deleteOldPingRecords (callback) {
     // The oldest timestamp that will be kept
     const oldestTimestamp = TimeTracker.getEpochMillis() - config.graphDuration
 
@@ -285,6 +291,10 @@ class Database {
       } else {
         const deleteTook = TimeTracker.getEpochMillis() - deleteStart
         logger.info(`Old ping records deleted in ${deleteTook}ms`)
+
+        if (callback !== undefined) {
+          callback()
+        }
       }
     })
     statement.finalize()