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September 1, 2025 09:54
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timezone-charts
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| import SwiftUI | |
| import Charts | |
| struct FacilityResponse: Codable { | |
| let id: String | |
| let name: String | |
| let timeZone: String | |
| let hasConsumption: Bool | |
| let hasProduction: Bool | |
| let measurements: Measurements | |
| } | |
| struct Measurements: Codable { | |
| let timeZone: String | |
| let messages: [String] | |
| let data: [MeasurementData] | |
| } | |
| struct MeasurementData: Codable { | |
| let timestamp: String | |
| let spotPrice: SpotPrice? | |
| let consumption: Consumption? | |
| let production: Production? | |
| } | |
| struct SpotPrice: Codable { | |
| let unit: String | |
| let value: Double | |
| } | |
| struct Consumption: Codable { | |
| } | |
| struct Production: Codable { | |
| let unit: String | |
| let total: Double | |
| let sold: Double? | |
| let consumed: Double? | |
| } | |
| class ChartModel: ObservableObject { | |
| @Published var chartData: [ChartDataPoint] = [] | |
| private let stockholmTimeZone = TimeZone(identifier: "Europe/Stockholm")! | |
| struct ChartDataPoint: Identifiable { | |
| let id = UUID() | |
| let date: Date | |
| // let displayDate: String | |
| let production: Double | |
| let spotPrice: Double? | |
| } | |
| func loadData(from json: Data) { | |
| let decoder = JSONDecoder() | |
| do { | |
| let facilities = try decoder.decode([FacilityResponse].self, from: json) | |
| guard let facility = facilities.first else { return } | |
| let dateFormatter = ISO8601DateFormatter() | |
| let displayFormatter = DateFormatter() | |
| displayFormatter.timeZone = stockholmTimeZone | |
| displayFormatter.dateFormat = "MMM d" | |
| chartData = facility.measurements.data.compactMap { measurement in | |
| guard let date = dateFormatter.date(from: measurement.timestamp) else { | |
| fatalError() | |
| } | |
| return ChartDataPoint( | |
| date: date, | |
| production: measurement.production?.total ?? 0, | |
| spotPrice: measurement.spotPrice?.value | |
| ) | |
| } | |
| } catch { | |
| print("Error decoding JSON: \(error)") | |
| } | |
| } | |
| } | |
| struct ProductionChartView: View { | |
| @StateObject private var viewModel = ChartModel() | |
| @State var selectedDate: Bool = true | |
| var body: some View { | |
| VStack(alignment: .leading, spacing: 20) { | |
| Text("Solar Production - Stockholm Time") | |
| .font(.title2) | |
| .bold() | |
| Chart(viewModel.chartData) { dataPoint in | |
| BarMark( | |
| x: .value("Date", dataPoint.date), | |
| y: .value("Production", dataPoint.production) | |
| ) | |
| .foregroundStyle(.green.gradient) | |
| if let spotPrice = dataPoint.spotPrice { | |
| LineMark( | |
| x: .value("Date", dataPoint.date), | |
| y: .value("Spot Price", spotPrice / 10) | |
| ) | |
| .foregroundStyle(.orange) | |
| .lineStyle(StrokeStyle(lineWidth: 2)) | |
| .symbol(.circle) | |
| } | |
| } | |
| .frame(height: 300) | |
| .chartXScale( | |
| domain: .automatic(dataType: Date.self) { dates in | |
| dates | |
| } | |
| ) | |
| .chartYAxis { | |
| AxisMarks(position: .leading) { value in | |
| AxisValueLabel { | |
| if let production = value.as(Double.self) { | |
| Text("\(Int(production)) kWh") | |
| .font(.caption) | |
| } | |
| } | |
| AxisGridLine() | |
| } | |
| } | |
| // .chartScrollPosition(x: $selectedDate) | |
| // .onChange(of: $selectedDate) { date in | |
| // | |
| // } | |
| .chartYAxis { | |
| AxisMarks(position: .trailing) { value in | |
| AxisValueLabel { | |
| if let price = value.as(Double.self) { | |
| Text("\(Int(price * 10)) öre") | |
| .font(.caption) | |
| .foregroundColor(.orange) | |
| } | |
| } | |
| } | |
| } | |
| .chartLegend { | |
| HStack(spacing: 20) { | |
| Label("Production (kWh)", systemImage: "square.fill") | |
| .foregroundColor(.green) | |
| Label("Spot Price (öre)", systemImage: "line.diagonal") | |
| .foregroundColor(.orange) | |
| } | |
| .font(.caption) | |
| } | |
| // Display timezone info | |
| HStack { | |
| Image(systemName: "clock") | |
| Text("All times shown in Europe/Stockholm timezone") | |
| .font(.caption) | |
| .foregroundColor(.secondary) | |
| } | |
| } | |
| .padding() | |
| .onAppear { | |
| // Load your JSON data here | |
| if let jsonData = sampleJSON.data(using: .utf8) { | |
| viewModel.loadData(from: jsonData) | |
| } | |
| } | |
| } | |
| } | |
| // Sample JSON for testing | |
| let sampleJSON = """ | |
| [ | |
| { | |
| "id": "225d0085-b260-48c7-8d0e-0fc539e8aabd", | |
| "name": "Odonbacken 6", | |
| "timeZone": "Europe/Stockholm", | |
| "hasConsumption": false, | |
| "hasProduction": true, | |
| "measurements": { | |
| "timeZone": "Europe/Stockholm", | |
| "messages": [], | |
| "data": [ | |
| { | |
| "timestamp": "2025-08-24T22:00:00Z", | |
| "spotPrice": { | |
| "unit": "öre", | |
| "value": 60.03554 | |
| }, | |
| "consumption": null, | |
| "production": { | |
| "unit": "kWh", | |
| "total": 23.37, | |
| "sold": null, | |
| "consumed": null | |
| } | |
| }, | |
| { | |
| "timestamp": "2025-08-25T22:00:00Z", | |
| "spotPrice": { | |
| "unit": "öre", | |
| "value": 104.656296 | |
| }, | |
| "consumption": null, | |
| "production": { | |
| "unit": "kWh", | |
| "total": 30.28, | |
| "sold": null, | |
| "consumed": null | |
| } | |
| } | |
| ] | |
| } | |
| } | |
| ] | |
| """ |
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