74 lines
2.6 KiB
Swift
74 lines
2.6 KiB
Swift
//
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// SWAPIPersonProvider.swift
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// Dip
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//
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// Created by Olivier Halligon on 10/10/2015.
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// Copyright © 2015 AliSoftware. All rights reserved.
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//
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import Foundation
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///Provides Person entitis fetching them with web service
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struct SWAPIPersonProvider : PersonProviderAPI {
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let ws: NetworkLayer
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//Here we inject dependency using _constructor injection_ pattern.
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//The alternative way is a _property injection_
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//but it should be used only for optional dependencies
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//where there is a good local default implementation
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init(webService: NetworkLayer) {
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self.ws = webService
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}
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func fetchIDs(completion: @escaping ([Int]) -> Void) {
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ws.request(path: "people") { response in
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do {
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let dict = try response.json() as NSDictionary
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guard let results = dict["results"] as? [NSDictionary] else { throw SWAPIError.InvalidJSON }
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// Extract URLs (flatten to ignore invalid ones)
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let urlStrings = results.compactMap({ $0["url"] as? String })
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let ids = urlStrings.compactMap(idFromURLString)
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completion(ids)
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}
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catch {
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completion([])
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}
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}
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}
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func fetch(id: Int, completion: @escaping (Person?) -> Void) {
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ws.request(path: "people/\(id)") { response in
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do {
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let json = try response.json() as NSDictionary
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guard
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let name = json["name"] as? String,
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let heightStr = json["height"] as? String, let height = Int(heightStr),
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let massStr = json["mass"] as? String, let mass = Int(massStr),
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let hairColor = json["hair_color"] as? String,
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let eyeColor = json["eye_color"] as? String,
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let gender = json["gender"] as? String,
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let starshipURLStrings = json["starships"] as? [String]
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else {
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throw SWAPIError.InvalidJSON
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}
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let person = Person(
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name: name,
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height: height,
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mass: mass,
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hairColor: hairColor,
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eyeColor: eyeColor,
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gender: Gender(rawValue: gender),
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starshipIDs: starshipURLStrings.compactMap(idFromURLString)
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)
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completion(person)
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}
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catch {
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completion(nil)
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}
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}
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}
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}
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