104 lines
3.3 KiB
Swift
104 lines
3.3 KiB
Swift
import Foundation
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struct DeviceInfo {
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let receivedDate: Date
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/// The number of bytes recorded by the tracker
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let numberOfRecordedBytes: Int
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/// The number of measurements already performed
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let numberOfMeasurements: Int
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/// The interval between measurements (in seconds)
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let measurementInterval: Int
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/// The maximum number of bytes which can be requested
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let transferBlockSize: Int
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let deviceStartTime: Date
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let nextMeasurement: Date
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let sensor0: TemperatureSensor?
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let sensor1: TemperatureSensor?
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let storageSize: Int
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/**
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The number of seconds the device has been powered on
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*/
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var numberOfSecondsRunning: Int {
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Int(-deviceStartTime.timeIntervalSinceNow)
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}
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var storageFillRatio: Double {
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Double(numberOfRecordedBytes) / Double(storageSize)
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}
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var storageFillPercentage: Int {
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Int((storageFillRatio * 100).rounded())
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}
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}
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extension DeviceInfo {
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static var size = 38
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init?(info: Data) {
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guard info.count == DeviceInfo.size else {
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print("Invalid info size \(info.count)")
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return nil
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}
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let data = Array(info)
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self.receivedDate = Date()
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self.numberOfRecordedBytes = .init(high: data[1], low: data[0])
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let secondsUntilNextMeasurement = UInt16(high: data[3], low: data[2])
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self.nextMeasurement = Date().addingTimeInterval(Double(secondsUntilNextMeasurement))
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self.measurementInterval = .init(high: data[5], low: data[4])
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self.numberOfMeasurements = .init(high: data[7], low: data[6])
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self.transferBlockSize = .init(high: data[9], low: data[8])
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let secondsSincePowerOn = Int(uint32: data[13], data[12], data[11], data[10])
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self.deviceStartTime = Date().addingTimeInterval(Double(-secondsSincePowerOn))
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self.sensor0 = .init(address: Array(data[16..<24]), valueByte: data[14], secondsAgo: UInt16(high: data[33], low: data[32]))
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self.sensor1 = .init(address: Array(data[24..<32]), valueByte: data[15], secondsAgo: UInt16(high: data[35], low: data[34]))
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self.storageSize = .init(high: data[37], low: data[36])
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}
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}
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private extension UInt16 {
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init(high: UInt8, low: UInt8) {
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self = UInt16(high) << 8 + UInt16(low)
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}
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}
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private extension Int {
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init(uint32 byte0: UInt8, _ byte1: UInt8, _ byte2: UInt8, _ byte3: UInt8) {
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self = (Int(byte0) << 24) | (Int(byte1) << 16) | (Int(byte2) << 8) | Int(byte3)
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}
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init(high: UInt8, low: UInt8) {
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self = Int(high) << 8 + Int(low)
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}
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}
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extension DeviceInfo {
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static var mock: DeviceInfo {
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.init(
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receivedDate: Date(),
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numberOfRecordedBytes: 123,
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numberOfMeasurements: 234,
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measurementInterval: 60,
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transferBlockSize: 180,
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deviceStartTime: .now.addingTimeInterval(-1000),
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nextMeasurement: .now.addingTimeInterval(5),
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sensor0: .init(address: [0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08], value: .value(21.0), date: .now.addingTimeInterval(-2)),
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sensor1: .init(address: [0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09], value: .value(19.0), date: .now.addingTimeInterval(-4)),
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storageSize: 10000)
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}
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}
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