2020-02-11 10:34:00 +04:00

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//
// ChardData.swift
// GraphTest
//
// Created by Andrei Salavei on 3/11/19.
// Copyright © 2019 Andrei Salavei. All rights reserved.
//
import Foundation
import UIKit
struct ChartsCollection {
struct Chart {
var color: UIColor
var name: String
var values: [Double]
}
var axisValues: [Date]
var chartValues: [Chart]
static let blank = ChartsCollection(axisValues: [], chartValues: [])
var isBlank: Bool {
return axisValues.isEmpty || chartValues.isEmpty
}
}
extension ChartsCollection {
public init(from decodedData: [String: Any]) throws {
guard let columns = decodedData["columns"] as? [[Any]] else {
throw ChartsError.generalConversion("Unable to get columns from: \(decodedData)")
}
guard let types = decodedData["types"] as? [String: String] else {
throw ChartsError.generalConversion("Unable to get types from: \(decodedData)")
}
guard let names = decodedData["names"] as? [String: String] else {
throw ChartsError.generalConversion("Unable to get names from: \(decodedData)")
}
guard let colors = decodedData["colors"] as? [String: String] else {
throw ChartsError.generalConversion("Unable to get colors from: \(decodedData)")
}
// chart.colors Color for each variable in 6-hex-digit format (e.g. "#AAAAAA").
// chart.names Name for each variable.
// chart.percentage true for percentage based values.
// chart.stacked true for values stacking on top of each other.
// chart.y_scaled true for charts with 2 Y axes.
var axixValuesToSetup: [Date] = []
var chartToSetup: [Chart] = []
for column in columns {
guard let columnId = column.first as? String else {
throw ChartsError.generalConversion("Unable to get column name from: \(column)")
}
guard let typeString = types[columnId], let type = ColumnType(rawValue: typeString) else {
throw ChartsError.generalConversion("Unable to get column type from: \(types) - \(columnId)")
}
switch type {
case .axix:
axixValuesToSetup = try column.dropFirst().map { Date(timeIntervalSince1970: try Convert.doubleFrom($0) / 1000) }
case .chart, .bar, .area:
guard let colorString = colors[columnId],
let color = UIColor(hexString: colorString) else {
throw ChartsError.generalConversion("Unable to get color name from: \(colors) - \(columnId)")
}
guard let name = names[columnId] else {
throw ChartsError.generalConversion("Unable to get column name from: \(names) - \(columnId)")
}
let values = try column.dropFirst().map { try Convert.doubleFrom($0) }
chartToSetup.append(Chart(color: color,
name: name,
values: values))
}
}
guard axixValuesToSetup.isEmpty == false,
chartToSetup.isEmpty == false,
chartToSetup.firstIndex(where: { $0.values.count != axixValuesToSetup.count }) == nil else {
throw ChartsError.generalConversion("Saniazing: Invalid number of items: \(axixValuesToSetup), \(chartToSetup)")
}
self.axisValues = axixValuesToSetup
self.chartValues = chartToSetup
}
}
private enum ColumnType: String {
case axix = "x"
case chart = "line"
case area = "area"
case bar = "bar"
}