Basic ingredient amount adjustment
This commit is contained in:
VincentMeilinger
212
Nextcloud Cookbook iOS Client/Data/Units.swift
Normal file
212
Nextcloud Cookbook iOS Client/Data/Units.swift
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//
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// Units.swift
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// Nextcloud Cookbook iOS Client
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//
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// Created by Vincent Meilinger on 11.03.24.
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//
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import Foundation
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import SwiftUI
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// MARK: - Ingredient Units
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enum MeasurementUnit {
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// Volume Metric
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case milliLiter, centiLiter, deciLiter, liter
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// Volume Imperial
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case teaspoon, tablespoon, cup, pint, quart, gallon, gill, fluidOunce // Please just use metric
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// Weight Metric
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case milliGram, gram, kilogram
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// Weight Imperial
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case ounce, pound
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// Other
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case pinch, dash, smidgen
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var localizedDescription: [LocalizedStringKey] {
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switch self {
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case .milliLiter:
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return ["milliliter", "millilitre", "ml", "cc"]
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case .centiLiter:
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return ["centiliter", "centilitre", "cl"]
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case .deciLiter:
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return ["deciliter", "decilitre", "dl"]
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case .liter:
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return ["liter", "litre", "l"]
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case .teaspoon:
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return ["teaspoon", "tsp"]
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case .tablespoon:
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return ["tablespoon", "tbsp"]
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case .cup:
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return ["cup", "c"]
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case .pint:
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return ["pint", "pt"]
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case .quart:
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return ["quart", "qt"]
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case .gallon:
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return ["gallon", "gal"]
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case .gill:
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return ["gill", "gi"]
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case .fluidOunce:
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return ["fluid ounce", "fl oz"]
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case .milliGram:
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return ["milligram", "mg"]
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case .gram:
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return ["gram", "g"]
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case .kilogram:
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return ["kilogram", "kg"]
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case .ounce:
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return ["ounce", "oz"]
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case .pound:
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return ["pound", "lb"]
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case .pinch:
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return ["pinch"]
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case .dash:
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return ["dash"]
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case .smidgen:
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return ["smidgen"]
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}
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}
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static func convert(value: Double, from fromUnit: MeasurementUnit, to toUnit: MeasurementUnit) -> Double? {
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let (baseValue, _) = MeasurementUnit.toBaseUnit(value: value, unit: fromUnit)
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return MeasurementUnit.fromBaseUnit(value: baseValue, targetUnit: toUnit)
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}
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private static func baseUnit(of unit: MeasurementUnit) -> MeasurementUnit {
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switch unit {
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// Volume Metric (all converted to liters)
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case .milliLiter, .centiLiter, .deciLiter, .liter, .teaspoon, .tablespoon, .cup, .pint, .quart, .gallon, .gill, .fluidOunce, .dash:
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return .liter
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// Weight (all converted to grams)
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case .milliGram, .gram, .kilogram, .ounce, .pound, .pinch, .smidgen:
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return .gram
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}
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}
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private static func toBaseUnit(value: Double, unit: MeasurementUnit) -> (Double, MeasurementUnit) {
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guard abs(value) >= Double(1e-10) else {
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return (0, unit)
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}
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switch unit {
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case .milliLiter:
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return (value/1000, .liter)
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case .centiLiter:
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return (value/100, .liter)
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case .deciLiter:
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return (value/10, .liter)
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case .liter:
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return (value, .liter)
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case .teaspoon:
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return (value * 0.005, .liter)
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case .tablespoon:
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return (value * 0.015, .liter)
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case .cup:
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return (value * 0.25, .liter)
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case .pint:
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return (value * 0.5, .liter)
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case .quart:
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return (value * 0.946, .liter)
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case .gallon:
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return (value * 3.8, .liter)
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case .gill:
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return (value * 0.17, .liter)
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case .fluidOunce:
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return (value * 0.03, .liter)
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case .milliGram:
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return (value * 0.001, .gram)
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case .gram:
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return (value, .gram)
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case .kilogram:
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return (value * 1000, .gram)
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case .ounce:
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return (value * 30, .gram)
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case .pound:
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return (value * 450, .gram)
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case .pinch:
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return (value * 0.3, .gram)
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case .dash:
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return (value * 0.000625, .liter)
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case .smidgen:
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return (value * 0.15, .gram)
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}
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}
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static private func fromBaseUnit(value: Double, targetUnit: MeasurementUnit) -> Double {
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guard abs(value) >= Double(1e-10) else {
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return 0
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}
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switch targetUnit {
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case .milliLiter:
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return value * 1000
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case .centiLiter:
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return value * 100
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case .deciLiter:
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return value * 10
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case .liter:
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return value
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case .teaspoon:
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return value / 0.005
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case .tablespoon:
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return value / 0.015
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case .cup:
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return value / 0.25
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case .pint:
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return value / 0.5
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case .quart:
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return value / 0.946
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case .gallon:
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return value / 3.8
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case .gill:
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return value / 0.17
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case .fluidOunce:
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return value / 0.03
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case .milliGram:
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return value * 1000
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case .gram:
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return value
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case .kilogram:
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return value / 1000
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case .ounce:
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return value / 30
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case .pound:
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return value / 450
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case .pinch:
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return value / 0.3
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case .dash:
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return value / 0.000625
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case .smidgen:
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return value / 0.15
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}
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}
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}
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enum TemperatureUnit {
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case fahrenheit, celsius
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var localizedDescription: [LocalizedStringKey] {
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switch self {
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case .fahrenheit:
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["fahrenheit", "f"]
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case .celsius:
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["celsius", "c"]
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}
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}
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static func celsiusToFahrenheit(_ celsius: Double) -> Double {
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return celsius * 9.0 / 5.0 + 32.0
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}
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static func fahrenheitToCelsius(_ fahrenheit: Double) -> Double {
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return (fahrenheit - 32.0) * 5.0 / 9.0
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}
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}
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