Refactor globals

TempTrack/Temperature/TemperatureDataTransfer.swift

@@ -6,8 +6,6 @@ final class TemperatureDataTransfer {
     
     private let interval: Int
     
-    weak var delegate: TemperatureDataTransferDelegate?
-    
     private var dataBuffer: Data = Data()
     
     private(set) var currentByteIndex = 0
@@ -17,8 +15,11 @@ final class TemperatureDataTransfer {
     private(set) var blockSize: Int
     
     private var numberOfRecordingsInCurrentTransfer = 0
-    
-    private(set) var lastRecording: TemperatureMeasurement = .init(sensor0: .notFound, sensor1: .notFound, date: .now)
+
+    var measurements: [TemperatureMeasurement] = []
+
+    /// The last temperatures to calculate relative values
+    private var lastRecording: TemperatureMeasurement = .init(sensor0: .notFound, sensor1: .notFound, date: .now)
     
     private var dateOfNextRecording: Date {
         startDateOfCurrentTransfer.addingTimeInterval(TimeInterval(numberOfRecordingsInCurrentTransfer * interval))
@@ -78,7 +79,6 @@ final class TemperatureDataTransfer {
     
     func completeTransfer() {
         processBytes()
-        delegate?.saveAfterTransfer()
     }
     
     private func addRelative(byte: UInt8) {
@@ -100,7 +100,7 @@ final class TemperatureDataTransfer {
             lastRecording.sensor1 = measurement.sensor1
         }
         lastRecording.id = measurement.id
-        delegate?.didReceiveRecording(measurement)
+        measurements.append(measurement)
     }
     
     private func convertTemp(value: UInt8, relativeTo previous: TemperatureValue) -> TemperatureValue {

TempTrack/Temperature/TemperatureDataTransferDelegate.swift

@@ -1,8 +0,0 @@
-import Foundation
-
-protocol TemperatureDataTransferDelegate: AnyObject {
-    
-    func didReceiveRecording(_ measurement: TemperatureMeasurement)
-    
-    func saveAfterTransfer()
-}

TempTrack/Temperature/TemperatureMeasurement.swift

@@ -5,7 +5,8 @@ struct TemperatureMeasurement: Identifiable {
     var sensor0: TemperatureValue
     
     var sensor1: TemperatureValue
-    
+
+    /// The seconds since 1970
     var id: Int
 
     var date: Date {
@@ -18,7 +19,7 @@ struct TemperatureMeasurement: Identifiable {
     }
 
     var secondsToNow: Int {
-        Date().seconds - id
+        id - Date().seconds
     }
     
     var maximumValue: Double? {
@@ -172,7 +173,7 @@ extension TemperatureMeasurement {
             TemperatureMeasurement(
                 sensor0: .init(value: $0.element.0),
                 sensor1: .init(value: $0.element.1),
-                id: seconds + $0.offset * 60)
+                id: seconds + ($0.offset - temps.count) * 60)
         }
     }()
 }