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ISSLocation+Decodable.swift
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ISSLocation+Decodable.swift
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//
// Copyright © 2019 Esri.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
import Foundation
import ArcGIS
// Example JSON returned from the ISS Location API at http://api.open-notify.org/iss-now.json
//
// {
// "timestamp": 1557499056,
// "message": "success",
// "iss_position": {
// "latitude": "-47.7396",
// "longitude": "39.7870"
// }
// }
extension ISSLocation: Decodable {
private enum CodingKeys: String, CodingKey {
case position = "iss_position", timestamp
}
init(from decoder: Decoder) throws {
let container = try decoder.container(keyedBy: CodingKeys.self)
timestamp = Date(timeIntervalSince1970: try container.decode(Double.self, forKey: .timestamp))
position = try container.decode(Position.self, forKey: .position).point
}
}
internal struct Position: Decodable {
let latitude: Double
let longitude: Double
private enum CodingKeys: String, CodingKey {
case latitude, longitude
}
init(from decoder: Decoder) throws {
let container = try decoder.container(keyedBy: CodingKeys.self)
guard let latitude = Double(try container.decode(String.self, forKey: .latitude)),
let longitude = Double(try container.decode(String.self, forKey: .longitude)) else {
throw DecodingError.typeMismatch(String.self, DecodingError.Context(codingPath: [CodingKeys.longitude, CodingKeys.latitude],
debugDescription: "Expected Strings representing Doubles for lat/lon"))
}
self.latitude = latitude
self.longitude = longitude
}
var point: AGSPoint {
return AGSPointMakeWGS84(latitude, longitude)
}
}