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// |
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// ChargedDeviceSessionDetailView.swift |
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// USB Meter |
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// |
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// Created by Codex on 22/04/2026. |
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// |
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import SwiftUI |
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struct ChargedDeviceSessionDetailView: View {
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@EnvironmentObject private var appData: AppData |
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@State private var pendingSessionDeletion: ChargeSessionSummary? |
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@State private var pendingCheckpointDeletion: ChargeCheckpointSummary? |
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let chargedDeviceID: UUID |
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let sessionID: UUID |
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private var chargedDevice: ChargedDeviceSummary? {
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appData.chargedDeviceSummary(id: chargedDeviceID) |
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} |
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private var session: ChargeSessionSummary? {
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chargedDevice?.sessions.first(where: { $0.id == sessionID })
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} |
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var body: some View {
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Group {
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if let chargedDevice, let session {
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ScrollView {
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VStack(spacing: 16) {
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overviewCard(session, chargedDevice: chargedDevice) |
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energyCard(session, chargedDevice: chargedDevice) |
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observedMetricsCard(session, chargedDevice: chargedDevice) |
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batteryCard(session) |
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if !session.displayedAggregatedSamples.isEmpty {
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storedCurveCard(session) |
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} |
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managementCard(session) |
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} |
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.padding() |
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} |
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.background( |
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LinearGradient( |
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colors: [statusTint(for: session).opacity(0.14), Color.clear], |
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startPoint: .topLeading, |
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endPoint: .bottomTrailing |
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) |
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.ignoresSafeArea() |
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) |
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.navigationTitle("Session Details")
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} else {
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Text("This session is no longer available.")
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.foregroundColor(.secondary) |
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.navigationTitle("Session")
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} |
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} |
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.alert(item: $pendingSessionDeletion) { session in
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Alert( |
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title: Text("Delete Session?"),
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message: Text("Deleting this charging session also recalculates capacity and every derived metric that used it."),
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primaryButton: .destructive(Text("Delete")) {
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_ = appData.deleteChargeSession(sessionID: session.id) |
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}, |
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secondaryButton: .cancel() |
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) |
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} |
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.alert(item: $pendingCheckpointDeletion) { checkpoint in
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Alert( |
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title: Text("Delete Battery Checkpoint"),
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message: Text("Remove the checkpoint at \(checkpoint.timestamp.format()) with \(checkpoint.batteryPercent.format(decimalDigits: 0))% from this session?"),
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primaryButton: .destructive(Text("Delete")) {
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_ = appData.deleteBatteryCheckpoint( |
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checkpointID: checkpoint.id, |
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for: checkpoint.sessionID |
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) |
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}, |
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secondaryButton: .cancel() |
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) |
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} |
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} |
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private func overviewCard( |
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_ session: ChargeSessionSummary, |
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chargedDevice: ChargedDeviceSummary |
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) -> some View {
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MeterInfoCardView(title: "Overview", tint: statusTint(for: session)) {
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MeterInfoRowView(label: "Device", value: chargedDevice.name) |
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MeterInfoRowView(label: "Status", value: session.status.title) |
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MeterInfoRowView(label: "Started", value: session.startedAt.format()) |
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if let endedAt = session.endedAt {
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MeterInfoRowView(label: "Ended", value: endedAt.format()) |
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} |
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MeterInfoRowView(label: "Duration", value: sessionDurationText(session)) |
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MeterInfoRowView(label: "Charging Type", value: session.chargingTransportMode.title) |
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MeterInfoRowView(label: "Charging Mode", value: session.chargingStateMode.title) |
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MeterInfoRowView(label: "Source", value: session.sourceMode.title) |
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MeterInfoRowView(label: "Auto Stop", value: autoStopDescription(for: session)) |
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if session.isTrimmed {
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MeterInfoRowView(label: "Trim Start", value: session.effectiveTrimStart.format()) |
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MeterInfoRowView(label: "Trim End", value: session.effectiveTrimEnd.format()) |
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} |
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if let meterName = session.meterName {
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MeterInfoRowView(label: "Meter", value: meterName) |
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} else if let meterMACAddress = session.meterMACAddress {
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MeterInfoRowView(label: "Meter", value: meterMACAddress) |
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} |
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if let meterModel = session.meterModel {
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MeterInfoRowView(label: "Meter Model", value: meterModel) |
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} |
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} |
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} |
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private func energyCard( |
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_ session: ChargeSessionSummary, |
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chargedDevice: ChargedDeviceSummary |
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) -> some View {
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MeterInfoCardView(title: "Energy", tint: .teal) {
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MeterInfoRowView(label: "Battery Energy", value: "\(session.effectiveOrMeasuredEnergyWh.format(decimalDigits: 3)) Wh") |
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MeterInfoRowView(label: "Measured Energy", value: "\(session.measuredEnergyWh.format(decimalDigits: 3)) Wh") |
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MeterInfoRowView(label: "Measured Charge", value: "\(session.measuredChargeAh.format(decimalDigits: 3)) Ah") |
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if let effectiveBatteryEnergyWh = session.effectiveBatteryEnergyWh, |
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abs(effectiveBatteryEnergyWh - session.measuredEnergyWh) > 0.01 {
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MeterInfoRowView(label: "Effective Battery Energy", value: "\(effectiveBatteryEnergyWh.format(decimalDigits: 3)) Wh") |
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} |
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if let capacityEstimateWh = session.capacityEstimateWh {
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MeterInfoRowView(label: "Capacity Estimate", value: "\(capacityEstimateWh.format(decimalDigits: 2)) Wh") |
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} |
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if let chargerID = session.chargerID, |
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let charger = appData.chargedDeviceSummary(id: chargerID) {
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MeterInfoRowView(label: chargedDevice.hasMultipleChargingTransports ? "Wireless Charger" : "Charger", value: charger.name) |
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} |
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if let wirelessSessionHint = wirelessSessionHint(for: session) {
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Text(wirelessSessionHint) |
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.font(.caption2) |
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.foregroundColor(session.shouldWarnAboutLowWirelessEfficiency ? .orange : .secondary) |
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} |
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} |
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} |
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private func observedMetricsCard( |
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_ session: ChargeSessionSummary, |
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chargedDevice: ChargedDeviceSummary |
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) -> some View {
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MeterInfoCardView(title: "Observed Metrics", tint: .blue) {
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if let minimumObservedCurrentAmps = session.minimumObservedCurrentAmps {
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MeterInfoRowView(label: "Min Current", value: "\(minimumObservedCurrentAmps.format(decimalDigits: 2)) A") |
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} |
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if let maximumObservedCurrentAmps = session.maximumObservedCurrentAmps {
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MeterInfoRowView(label: "Max Current", value: "\(maximumObservedCurrentAmps.format(decimalDigits: 2)) A") |
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} |
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if let maximumObservedPowerWatts = session.maximumObservedPowerWatts {
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MeterInfoRowView(label: "Max Power", value: "\(maximumObservedPowerWatts.format(decimalDigits: 2)) W") |
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} |
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if let maximumObservedVoltageVolts = session.maximumObservedVoltageVolts {
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MeterInfoRowView(label: "Max Voltage", value: "\(maximumObservedVoltageVolts.format(decimalDigits: 2)) V") |
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} |
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if chargedDevice.isCharger, let selectedSourceVoltageVolts = session.selectedSourceVoltageVolts {
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MeterInfoRowView(label: "Selected Voltage", value: "\(selectedSourceVoltageVolts.format(decimalDigits: 2)) V") |
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} |
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if let completionCurrentAmps = session.completionCurrentAmps {
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MeterInfoRowView(label: "Completion Current", value: "\(completionCurrentAmps.format(decimalDigits: 2)) A") |
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} |
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if session.selectedDataGroup != nil {
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MeterInfoRowView(label: "Data Group", value: "\(session.selectedDataGroup ?? 0)") |
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} |
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} |
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} |
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private func batteryCard(_ session: ChargeSessionSummary) -> some View {
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MeterInfoCardView(title: "Battery", tint: .orange) {
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if let startBatteryPercent = session.startBatteryPercent {
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MeterInfoRowView(label: "Start Battery", value: "\(startBatteryPercent.format(decimalDigits: 0))%") |
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} |
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if let endBatteryPercent = session.endBatteryPercent {
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MeterInfoRowView(label: "End Battery", value: "\(endBatteryPercent.format(decimalDigits: 0))%") |
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} |
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if let batteryDeltaPercent = session.batteryDeltaPercent {
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MeterInfoRowView(label: "Battery Delta", value: "\(batteryDeltaPercent.format(decimalDigits: 0))%") |
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} |
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BatteryCheckpointSectionView( |
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sessionID: session.id, |
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checkpoints: session.checkpoints, |
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message: "These checkpoints were saved with this closed session and feed capacity estimation and charge-level prediction.", |
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canAddCheckpoint: false, |
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requirementMessage: nil, |
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effectiveEnergyWhOverride: nil, |
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measuredChargeAhOverride: nil, |
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onDelete: { checkpoint in
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pendingCheckpointDeletion = checkpoint |
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} |
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) |
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} |
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} |
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private func managementCard(_ session: ChargeSessionSummary) -> some View {
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MeterInfoCardView(title: "Administration", tint: .red) {
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Button(role: .destructive) {
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pendingSessionDeletion = session |
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} label: {
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Label("Delete Session", systemImage: "trash")
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.font(.subheadline.weight(.semibold)) |
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.frame(maxWidth: .infinity) |
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.padding(.vertical, 10) |
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.meterCard(tint: .red, fillOpacity: 0.12, strokeOpacity: 0.20, cornerRadius: 14) |
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} |
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.buttonStyle(.plain) |
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} |
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} |
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private func storedCurveCard(_ session: ChargeSessionSummary) -> some View {
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let displayedSamples = session.displayedAggregatedSamples |
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let currentSeries = storedSeriesSnapshot( |
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from: displayedSamples, |
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minimumYSpan: 0.15 |
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) { $0.averageCurrentAmps }
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let energySeries = storedSeriesSnapshot( |
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from: displayedSamples, |
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minimumYSpan: 0.2 |
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) { $0.measuredEnergyWh }
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return VStack(alignment: .leading, spacing: 14) {
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HStack(alignment: .firstTextBaseline) {
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VStack(alignment: .leading, spacing: 4) {
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Text("Session Curve")
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.font(.headline) |
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Text(session.isTrimmed ? "Showing the saved trim window." : "Persisted aggregate samples for this session.") |
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.font(.caption) |
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.foregroundColor(.secondary) |
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} |
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Spacer() |
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Text("\(displayedSamples.count) points")
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.font(.caption.weight(.semibold)) |
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.foregroundColor(.secondary) |
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} |
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if let currentSeries {
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storedSeriesChart( |
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title: "Current", |
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unit: "A", |
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strokeColor: .blue, |
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snapshot: currentSeries |
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) |
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} |
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if let energySeries {
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storedSeriesChart( |
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title: "Energy", |
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unit: "Wh", |
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strokeColor: .teal, |
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areaChart: true, |
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snapshot: energySeries |
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) |
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} |
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} |
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.frame(maxWidth: .infinity, alignment: .leading) |
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.padding(18) |
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.meterCard(tint: .indigo, fillOpacity: 0.12, strokeOpacity: 0.18, cornerRadius: 18) |
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} |
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private func storedSeriesSnapshot( |
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from samples: [ChargeSessionSampleSummary], |
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minimumYSpan: Double, |
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value: (ChargeSessionSampleSummary) -> Double |
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) -> StoredSessionSeriesSnapshot? {
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let sortedSamples = samples.sorted { lhs, rhs in
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if lhs.bucketIndex != rhs.bucketIndex {
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return lhs.bucketIndex < rhs.bucketIndex |
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} |
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return lhs.timestamp < rhs.timestamp |
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} |
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guard |
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let firstSample = sortedSamples.first, |
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let lastSample = sortedSamples.last |
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else {
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return nil |
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} |
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let points = sortedSamples.enumerated().map { index, sample in
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Measurements.Measurement.Point( |
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id: index, |
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timestamp: sample.timestamp, |
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value: value(sample), |
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kind: .sample |
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) |
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} |
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let minimumValue = points.map(\.value).min() ?? 0 |
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let maximumValue = points.map(\.value).max() ?? minimumValue |
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let context = ChartContext() |
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context.setBounds( |
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xMin: CGFloat(firstSample.timestamp.timeIntervalSince1970), |
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xMax: CGFloat(max(lastSample.timestamp.timeIntervalSince1970, firstSample.timestamp.timeIntervalSince1970 + 1)), |
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yMin: CGFloat(minimumValue), |
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yMax: CGFloat(maximumValue) |
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) |
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context.ensureMinimumSize(width: 1, height: CGFloat(max(maximumValue - minimumValue, minimumYSpan))) |
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return StoredSessionSeriesSnapshot( |
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points: points, |
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context: context, |
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minimumValue: minimumValue, |
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maximumValue: maximumValue |
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) |
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} |
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private func storedSeriesChart( |
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title: String, |
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unit: String, |
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strokeColor: Color, |
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areaChart: Bool = false, |
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snapshot: StoredSessionSeriesSnapshot |
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) -> some View {
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VStack(alignment: .leading, spacing: 8) {
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HStack(alignment: .firstTextBaseline) {
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Text(title) |
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.font(.subheadline.weight(.semibold)) |
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Spacer() |
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Text( |
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"Latest \(snapshot.lastValue.format(decimalDigits: 2)) \(unit) - \(snapshot.minimumValue.format(decimalDigits: 2))-\(snapshot.maximumValue.format(decimalDigits: 2)) \(unit)" |
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) |
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.font(.caption2) |
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.foregroundColor(.secondary) |
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} |
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TimeSeriesChart( |
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points: snapshot.points, |
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context: snapshot.context, |
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areaChart: areaChart, |
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strokeColor: strokeColor |
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) |
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.frame(height: 118) |
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.padding(.horizontal, 6) |
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.padding(.vertical, 8) |
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.background( |
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RoundedRectangle(cornerRadius: 16) |
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.fill(strokeColor.opacity(areaChart ? 0.08 : 0.06)) |
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) |
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HStack {
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Text(snapshot.startLabel) |
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Spacer() |
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Text(snapshot.endLabel) |
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} |
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.font(.caption2) |
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.foregroundColor(.secondary) |
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} |
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} |
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private func sessionDurationText(_ session: ChargeSessionSummary) -> String {
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let formatter = DateComponentsFormatter() |
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let effectiveDuration = max(session.effectiveDuration, 0) |
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formatter.allowedUnits = effectiveDuration >= 3600 ? [.hour, .minute] : [.minute, .second] |
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formatter.unitsStyle = .abbreviated |
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formatter.zeroFormattingBehavior = .dropAll |
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return formatter.string(from: effectiveDuration) ?? "0m" |
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} |
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| 363 | ||
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private func autoStopDescription(for session: ChargeSessionSummary) -> String {
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if session.autoStopEnabled == false {
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return "Manual" |
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} |
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if session.stopThresholdAmps > 0 {
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return "\(session.stopThresholdAmps.format(decimalDigits: 2)) A" |
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} |
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return "Learning" |
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} |
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| 373 | ||
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private func wirelessSessionHint(for session: ChargeSessionSummary) -> String? {
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guard session.chargingTransportMode == .wireless else {
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return nil |
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} |
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| 378 | ||
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var components: [String] = [] |
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if let wirelessEfficiencyFactor = session.wirelessEfficiencyFactor {
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components.append("Efficiency \(Int((wirelessEfficiencyFactor * 100).rounded()))%")
|
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} |
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if session.usesEstimatedWirelessEfficiency {
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components.append("Estimated from wired baseline and checkpoints")
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} |
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if session.shouldWarnAboutLowWirelessEfficiency {
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components.append("Low wireless efficiency, so capacity confidence is reduced")
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} |
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return components.isEmpty ? nil : components.joined(separator: " - ") |
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} |
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| 392 | ||
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private func statusTint(for session: ChargeSessionSummary) -> Color {
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switch session.status {
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case .active: |
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return .green |
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case .paused: |
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return .orange |
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case .completed: |
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return .teal |
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case .abandoned: |
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return .secondary |
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} |
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} |
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} |
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| 406 | ||
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private struct StoredSessionSeriesSnapshot {
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let points: [Measurements.Measurement.Point] |
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let context: ChartContext |
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let minimumValue: Double |
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let maximumValue: Double |
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| 412 | ||
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var lastValue: Double {
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points.last?.value ?? 0 |
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} |
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| 416 | ||
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var startLabel: String {
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guard let firstTimestamp = points.first?.timestamp else { return "" }
|
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return firstTimestamp.formatted(date: .omitted, time: .shortened) |
|
| 420 |
} |
|
| 421 | ||
| 422 |
var endLabel: String {
|
|
| 423 |
guard let lastTimestamp = points.last?.timestamp else { return "" }
|
|
| 424 |
return lastTimestamp.formatted(date: .omitted, time: .shortened) |
|
| 425 |
} |
|
| 426 |
} |
|
| 427 |