Blaming USB-Meter/USB Meter/Model/Measurements.swift at 08a8ff3f932ea7e0219d660d2d7e3a9fb1b60b2e · bogdan/USB-Meter

USB-Meter / USB Meter / Model / Measurements.swift

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bogdan Implement charge record workflow and stabilize charts

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Initial commit Bogdan Timofte authored 2 weeks ago	1	//
	2	// Measurements.swift
	3	// USB Meter
	4	//
	5	// Created by Bogdan Timofte on 07/05/2020.
	6	// Copyright © 2020 Bogdan Timofte. All rights reserved.
	7	//
	8
	9	import Foundation
	10	import CoreGraphics
	11
	12	class Measurements : ObservableObject {
	13
	14	class Measurement : ObservableObject {
	15	struct Point : Identifiable , Hashable {
	16	var id : Int
	17	var timestamp: Date
	18	var value: Double
	19	func point() -> CGPoint {
	20	return CGPoint(x: timestamp.timeIntervalSince1970, y: value)
	21	}
	22	}
	23
	24	var points: [Point] = []
	25	var context = ChartContext()
	26
	27	func removeValue(index: Int) {
	28	points.remove(at: index)
	29	context.reset()
	30	for point in points {
	31	context.include( point: point.point() )
	32	}
	33	self.objectWillChange.send()
	34	}
	35
	36	func addPoint(timestamp: Date, value: Double) {
	37	let newPoint = Measurement.Point(id: points.count, timestamp: timestamp, value: value)
	38	points.append(newPoint)
	39	context.include( point: newPoint.point() )
	40	self.objectWillChange.send()
	41	}
	42
	43	func reset() {
	44	points.removeAll()
	45	context.reset()
	46	self.objectWillChange.send()
	47	}
Implement charge record work... Bogdan Timofte authored 2 weeks ago	48
	49	func trim(before cutoff: Date) {
	50	points = points
	51	.filter { $0.timestamp >= cutoff }
	52	.enumerated()
	53	.map { index, point in
	54	Measurement.Point(id: index, timestamp: point.timestamp, value: point.value)
	55	}
	56	context.reset()
	57	for point in points {
	58	context.include(point: point.point())
	59	}
	60	self.objectWillChange.send()
	61	}
Initial commit Bogdan Timofte authored 2 weeks ago	62	}
	63
	64	@Published var power = Measurement()
	65	@Published var voltage = Measurement()
	66	@Published var current = Measurement()
	67
	68	private var lastPointTimestamp = 0
	69
	70	private var itemsInSum: Double = 0
	71	private var powerSum: Double = 0
	72	private var voltageSum: Double = 0
	73	private var currentSum: Double = 0
Implement charge record work... Bogdan Timofte authored 2 weeks ago	74
	75	func reset() {
	76	power.reset()
	77	voltage.reset()
	78	current.reset()
	79	lastPointTimestamp = 0
	80	itemsInSum = 0
	81	powerSum = 0
	82	voltageSum = 0
	83	currentSum = 0
	84	self.objectWillChange.send()
	85	}
Initial commit Bogdan Timofte authored 2 weeks ago	86
	87	func remove(at idx: Int) {
	88	power.removeValue(index: idx)
	89	voltage.removeValue(index: idx)
	90	current.removeValue(index: idx)
	91	self.objectWillChange.send()
	92	}
	93
Implement charge record work... Bogdan Timofte authored 2 weeks ago	94	func trim(before cutoff: Date) {
	95	power.trim(before: cutoff)
	96	voltage.trim(before: cutoff)
	97	current.trim(before: cutoff)
	98	self.objectWillChange.send()
	99	}
	100
Initial commit Bogdan Timofte authored 2 weeks ago	101
	102
	103	func addValues(timestamp: Date, power: Double, voltage: Double, current: Double) {
	104	let valuesTimestamp = timestamp.timeIntervalSinceReferenceDate.intValue
	105	if lastPointTimestamp == 0 {
	106	lastPointTimestamp = valuesTimestamp
	107	}
	108	if lastPointTimestamp == valuesTimestamp {
	109	itemsInSum += 1
Implement charge record work... Bogdan Timofte authored 2 weeks ago	110	powerSum += power
Initial commit Bogdan Timofte authored 2 weeks ago	111	voltageSum += voltage
	112	currentSum += current
	113	}
	114	else {
	115	self.power.addPoint( timestamp: timestamp, value: powerSum / itemsInSum )
	116	self.voltage.addPoint( timestamp: timestamp, value: voltageSum / itemsInSum )
	117	self.current.addPoint( timestamp: timestamp, value: currentSum / itemsInSum )
	118	lastPointTimestamp = valuesTimestamp
	119	itemsInSum = 1
	120	powerSum = power
	121	voltageSum = voltage
	122	currentSum = current
	123	}
	124	self.objectWillChange.send()
	125	}
	126	}