WIP - a lot of uncommitted work

Shared/BGTask.swift

@@ -0,0 +1,40 @@
+//
+//  BGTask.swift
+//  Feels (iOS)
+//
+//  Created by Trey Tartt on 1/12/22.
+//
+
+import Foundation
+import BackgroundTasks
+
+class BGTask {
+    static let updateDBMissingID = "com.88oak.Feels.dbUpdateMissing"
+    
+    class func runFillInMissingDatesTask(task: BGProcessingTask) {
+        BGTask.scheduleBackgroundProcessing()
+        
+        task.expirationHandler = {
+            task.setTaskCompleted(success: false)
+        }
+        
+        PersistenceController.shared.fillInMissingDates()
+        task.setTaskCompleted(success: true)
+    }
+    
+    class func scheduleBackgroundProcessing() {
+        let request = BGProcessingTaskRequest(identifier: BGTask.updateDBMissingID)
+        request.requiresNetworkConnectivity = false
+        request.requiresExternalPower = false
+        
+        var runDate = Calendar.current.date(byAdding: .day, value: 1, to: Date())
+        runDate = Calendar.current.date(bySettingHour: 0, minute: 1, second: 0, of: runDate!)
+        request.earliestBeginDate = runDate
+        
+        do {
+            try BGTaskScheduler.shared.submit(request)
+        } catch {
+            print("Could not schedule image fetch: (error)")
+        }
+    }
+}