Spaces:
Sleeping
Sleeping
File size: 9,052 Bytes
6ee917b | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 | import Foundation
/// Represent a variable combined with a pressure level and helps decoding it
protocol PressureVariableRespresentable: RawRepresentable where RawValue == String, Variable.RawValue == String {
associatedtype Variable: RawRepresentable
var variable: Variable { get }
var level: Int { get }
init(variable: Variable, level: Int)
}
extension PressureVariableRespresentable {
init?(rawValue: String) {
guard let pos = rawValue.lastIndex(of: "_"), let posEnd = rawValue[pos..<rawValue.endIndex].range(of: "hPa") else {
return nil
}
let variableString = rawValue[rawValue.startIndex ..< pos]
guard let variable = Variable(rawValue: String(variableString)) else {
return nil
}
let start = rawValue.index(after: pos)
let levelString = rawValue[start..<posEnd.lowerBound]
guard let level = Int(levelString) else {
return nil
}
self.init(variable: variable, level: level)
}
var rawValue: String {
return "\(variable.rawValue)_\(level)hPa"
}
init(from decoder: Decoder) throws {
let s = try decoder.singleValueContainer().decode(String.self)
guard let initialised = Self.init(rawValue: s) else {
throw DecodingError.dataCorrupted(DecodingError.Context(codingPath: decoder.codingPath, debugDescription: "Cannot initialize \(Self.self) from invalid String value \(s)", underlyingError: nil))
}
self = initialised
}
func encode(to encoder: Encoder) throws {
var e = encoder.singleValueContainer()
try e.encode(rawValue)
}
}
/// Represent a variable combined with a pressure level and helps decoding it
protocol HeightVariableRespresentable: RawRepresentable where RawValue == String, Variable.RawValue == String {
associatedtype Variable: RawRepresentable
var variable: Variable { get }
var level: Int { get }
init(variable: Variable, level: Int)
}
extension HeightVariableRespresentable {
init?(rawValue: String) {
guard let pos = rawValue.lastIndex(of: "_"), let posEnd = rawValue[pos..<rawValue.endIndex].range(of: "m") else {
return nil
}
let variableString = rawValue[rawValue.startIndex ..< pos]
guard let variable = Variable(rawValue: String(variableString)) else {
return nil
}
let start = rawValue.index(after: pos)
let levelString = rawValue[start..<posEnd.lowerBound]
guard let level = Int(levelString) else {
return nil
}
self.init(variable: variable, level: level)
}
var rawValue: String {
return "\(variable.rawValue)_\(level)m"
}
init(from decoder: Decoder) throws {
let s = try decoder.singleValueContainer().decode(String.self)
guard let initialised = Self.init(rawValue: s) else {
throw DecodingError.dataCorrupted(DecodingError.Context(codingPath: decoder.codingPath, debugDescription: "Cannot initialize \(Self.self) from invalid String value \(s)", underlyingError: nil))
}
self = initialised
}
func encode(to encoder: Encoder) throws {
var e = encoder.singleValueContainer()
try e.encode(rawValue)
}
}
protocol RawRepresentableString {
init?(rawValue: String)
var rawValue: String { get }
}
/// Enum with surface and pressure variable
enum SurfaceAndPressureVariable<Surface, Pressure> {
case surface(Surface)
case pressure(Pressure)
}
extension SurfaceAndPressureVariable: RawRepresentableString where Pressure: RawRepresentableString, Surface: RawRepresentableString {
init?(rawValue: String) {
if let variable = Pressure(rawValue: rawValue) {
self = .pressure(variable)
return
}
if let variable = Surface(rawValue: rawValue) {
self = .surface(variable)
return
}
return nil
}
var rawValue: String {
switch self {
case .surface(let variable): return variable.rawValue
case .pressure(let variable): return variable.rawValue
}
}
}
extension SurfaceAndPressureVariable: Hashable, Equatable where Pressure: Hashable, Surface: Hashable {
}
extension SurfaceAndPressureVariable: GenericVariable where Surface: GenericVariable, Pressure: GenericVariable {
var asGenericVariable: GenericVariable {
switch self {
case .surface(let surface):
return surface
case .pressure(let pressure):
return pressure
}
}
var storePreviousForecast: Bool {
asGenericVariable.storePreviousForecast
}
var omFileName: (file: String, level: Int) {
asGenericVariable.omFileName
}
var scalefactor: Float {
asGenericVariable.scalefactor
}
var interpolation: ReaderInterpolation {
asGenericVariable.interpolation
}
var unit: SiUnit {
asGenericVariable.unit
}
var isElevationCorrectable: Bool {
asGenericVariable.isElevationCorrectable
}
}
extension SurfaceAndPressureVariable: GenericVariableMixable where Surface: GenericVariableMixable, Pressure: GenericVariableMixable {
var requiresOffsetCorrectionForMixing: Bool {
switch self {
case .surface(let surface):
return surface.requiresOffsetCorrectionForMixing
case .pressure(let pressure):
return pressure.requiresOffsetCorrectionForMixing
}
}
}
/// Enum with surface and pressure variable
enum SurfacePressureAndHeightVariable<Surface, Pressure, Height> {
case surface(Surface)
case pressure(Pressure)
case height(Height)
}
extension SurfacePressureAndHeightVariable: RawRepresentableString where Pressure: RawRepresentableString, Surface: RawRepresentableString, Height: RawRepresentableString {
init?(rawValue: String) {
if let variable = Pressure(rawValue: rawValue) {
self = .pressure(variable)
return
}
if let variable = Surface(rawValue: rawValue) {
self = .surface(variable)
return
}
return nil
}
var rawValue: String {
switch self {
case .surface(let variable): return variable.rawValue
case .pressure(let variable): return variable.rawValue
case .height(let variable): return variable.rawValue
}
}
}
extension SurfacePressureAndHeightVariable: Hashable, Equatable where Pressure: Hashable, Surface: Hashable, Height: Hashable {
}
extension SurfacePressureAndHeightVariable: GenericVariable where Surface: GenericVariable, Pressure: GenericVariable, Height: GenericVariable {
var asGenericVariable: GenericVariable {
switch self {
case .surface(let surface):
return surface
case .pressure(let pressure):
return pressure
case .height(let height):
return height
}
}
var storePreviousForecast: Bool {
asGenericVariable.storePreviousForecast
}
var omFileName: (file: String, level: Int) {
asGenericVariable.omFileName
}
var scalefactor: Float {
asGenericVariable.scalefactor
}
var interpolation: ReaderInterpolation {
asGenericVariable.interpolation
}
var unit: SiUnit {
asGenericVariable.unit
}
var isElevationCorrectable: Bool {
asGenericVariable.isElevationCorrectable
}
}
extension SurfacePressureAndHeightVariable: GenericVariableMixable where Surface: GenericVariableMixable, Pressure: GenericVariableMixable, Height: GenericVariableMixable {
var requiresOffsetCorrectionForMixing: Bool {
switch self {
case .surface(let surface):
return surface.requiresOffsetCorrectionForMixing
case .pressure(let pressure):
return pressure.requiresOffsetCorrectionForMixing
case .height(let height):
return height.requiresOffsetCorrectionForMixing
}
}
}
enum VariableOrDerived<Raw: RawRepresentableString, Derived: RawRepresentableString>: RawRepresentableString {
case raw(Raw)
case derived(Derived)
init?(rawValue: String) {
if let val = Derived.init(rawValue: rawValue) {
self = .derived(val)
return
}
if let val = Raw.init(rawValue: rawValue) {
self = .raw(val)
return
}
return nil
}
var rawValue: String {
switch self {
case .raw(let raw):
return raw.rawValue
case .derived(let derived):
return derived.rawValue
}
}
var name: String {
switch self {
case .raw(let variable): return variable.rawValue
case .derived(let variable): return variable.rawValue
}
}
}
|