feat(networking): creating network layer

.gitignore

@@ -16,6 +16,8 @@ DerivedData/
 *.perspectivev3
 !default.perspectivev3
 xcuserdata/
+*.DS_Store
+##xcshareddata
 
 ## Other
 *.moved-aside
@@ -46,7 +48,9 @@ playground.xcworkspace
 # you should judge for yourself, the pros and cons are mentioned at:
 # https://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control
 #
-# Pods/
+iOSBooks/Pods/
+iOSBooks/iOSBooks.xcworkspace
+iOSBooks/Podfile.lock
 
 # Carthage
 #

iOSBooks/Podfile

@@ -0,0 +1,19 @@
+# Uncomment the next line to define a global platform for your project
+platform :ios, '12.0'
+
+target 'iOSBooks' do
+  # Comment the next line if you don't want to use dynamic frameworks
+  use_frameworks!
+
+  # Pods for iOSBooks
+  pod 'PromiseKit'
+  pod 'IQKeyboardManagerSwift'
+
+  target 'iOSBooksTests' do
+    inherit! :search_paths
+    # Pods for testing
+    pod 'Quick', '~> 2.1.0'
+    pod 'Nimble', '~> 8.0.1'
+  end
+
+end

iOSBooks/iOSBooks/Data/Clients/BooksClient.swift

@@ -0,0 +1,23 @@
+//
+//  BooksClient.swift
+//  iOSBooks
+//
+//  Created by Guilherme Antunes Ferreira on 28/08/19.
+//  Copyright © 2019 Guilherme Antunes. All rights reserved.
+//
+
+import Foundation
+import PromiseKit
+
+class BooksClient {
+
+    let apiClient: APIClient
+
+    init(apiClient: APIClient = APIClient()) {
+        self.apiClient = apiClient
+    }
+
+    func fetchBooksList() -> Promise<BooksList> {
+        return apiClient.request(model: BooksList.self, BooksAPI.list.request)
+    }
+}

iOSBooks/iOSBooks/Data/Endpoints/BooksAPI.swift

@@ -0,0 +1,67 @@
+//
+//  BooksAPI.swift
+//  iOSBooks
+//
+//  Created by Guilherme Antunes Ferreira on 28/08/19.
+//  Copyright © 2019 Guilherme Antunes. All rights reserved.
+//
+
+import Foundation
+
+enum BooksAPI: Endpoint {
+
+    case list
+
+    var path: String {
+        switch self {
+        case .list:
+            return "https://www.googleapis.com/books/v1/volumes"
+        }
+    }
+
+    var headers: [String : String]? {
+        switch self {
+        case .list:
+            return nil
+        }
+    }
+
+    var body: Data? {
+        switch self {
+        case .list:
+            return nil
+        }
+    }
+
+    var httpMethod: String {
+        switch self {
+        case .list:
+            return "GET"
+        }
+    }
+
+    var queryItems: [URLQueryItem]? {
+        switch self {
+        case .list:
+            let subjectItem = URLQueryItem(name: "q", value: "ios")
+            let maxResultsItem = URLQueryItem(name: "maxResults", value: "20")
+            let startIndexItem = URLQueryItem(name: "startIndex", value: "0")
+            return [subjectItem, startIndexItem, maxResultsItem]
+        }
+    }
+
+    var request: URLRequest {
+        switch self {
+        case .list:
+            guard var components = URLComponents(string: path) else { fatalError() }
+            components.queryItems = queryItems
+            guard let url = components.url else { fatalError() }
+            var request = URLRequest(url: url)
+            request.allHTTPHeaderFields = headers
+            request.httpMethod = httpMethod
+            request.httpBody = body
+            return request
+        }
+    }
+}
+

iOSBooks/iOSBooks/Data/Models/Book.swift

@@ -0,0 +1,24 @@
+//
+//  Book.swift
+//  iOSBooks
+//
+//  Created by Guilherme Antunes Ferreira on 28/08/19.
+//  Copyright © 2019 Guilherme Antunes. All rights reserved.
+//
+
+import Foundation
+
+class Book: Codable {
+    let authors: [String]?
+    let title: String?
+    let subtitle: String?
+    let description: String?
+    let imageLinks: ImageLinks?
+
+    enum CodingKeys: String, CodingKey {
+        case authors, title, subtitle, description, imageLinks
+    }
+}
+
+
+

iOSBooks/iOSBooks/Data/Models/BooksList.swift

@@ -0,0 +1,18 @@
+//
+//  BooksList.swift
+//  iOSBooks
+//
+//  Created by Guilherme Antunes Ferreira on 28/08/19.
+//  Copyright © 2019 Guilherme Antunes. All rights reserved.
+//
+
+import Foundation
+
+class BooksList: Codable {
+    let items: [Item]?
+    let totalItems : Int?
+
+    enum CodingKeys: String, CodingKey {
+        case items, totalItems
+    }
+}

iOSBooks/iOSBooks/Data/Models/ImageLinks.swift

@@ -0,0 +1,19 @@
+//
+//  ImageLinks.swift
+//  iOSBooks
+//
+//  Created by Guilherme Antunes Ferreira on 28/08/19.
+//  Copyright © 2019 Guilherme Antunes. All rights reserved.
+//
+
+import Foundation
+
+class ImageLinks: Codable {
+    let smallThumbnail: String?
+    let thumbnail: String?
+
+    enum CodingKeys: String, CodingKey {
+        case smallThumbnail, thumbnail
+    }
+
+}

iOSBooks/iOSBooks/Data/Models/Item.swift

@@ -0,0 +1,21 @@
+//
+//  Item.swift
+//  iOSBooks
+//
+//  Created by Guilherme Antunes Ferreira on 28/08/19.
+//  Copyright © 2019 Guilherme Antunes. All rights reserved.
+//
+
+import Foundation
+
+class Item: Codable {
+    let id: String?
+    let book: Book?
+    let salesInfo : SalesInfo?
+
+    enum CodingKeys: String, CodingKey {
+        case book = "volumeInfo"
+        case id
+        case salesInfo = "saleInfo"
+    }
+}

iOSBooks/iOSBooks/Data/Models/SalesInfo.swift

@@ -0,0 +1,14 @@
+//
+//  SalesInfo.swift
+//  iOSBooks
+//
+//  Created by Guilherme Antunes Ferreira on 28/08/19.
+//  Copyright © 2019 Guilherme Antunes. All rights reserved.
+//
+
+import Foundation
+
+class SalesInfo: Codable {
+    let country: String?
+    let buyLink: String?
+}

iOSBooks/iOSBooks/Data/Network/APIClient.swift

@@ -0,0 +1,61 @@
+//
+//  APIClient.swift
+//  iOSBooks
+//
+//  Created by Guilherme Antunes Ferreira on 28/08/19.
+//  Copyright © 2019 Guilherme Antunes. All rights reserved.
+//
+
+import Foundation
+import PromiseKit
+
+enum CustomError: Error {
+    case connectionError(String)
+    case mappingError(String)
+    case APIError(String)
+    case generalError(String)
+    case deallocatedClass(String)
+}
+
+class APIClient {
+
+    let connectionChecker: Reachability
+    let decoder: JSONDecoder
+    let session: URLSession
+
+    init(connectionChecker: Reachability = Reachability(), decoder: JSONDecoder = JSONDecoder(), session: URLSession = URLSession.shared) {
+        self.connectionChecker = connectionChecker
+        self.decoder = decoder
+        self.session = session
+    }
+
+    func request<T: Codable>(model: T.Type, _ request: URLRequest) -> Promise<T> {
+        return Promise<T> { [weak self] seal in
+            guard let _self = self else {
+                print("Class deinitialized!")
+                return
+            }
+
+            guard connectionChecker.isConnected else {
+                seal.reject(CustomError.connectionError("Por favor, verifique sua conexão com a internet!"))
+                return
+            }
+
+            session.dataTask(with: request, completionHandler: { (data, response, error) in
+                guard let data = data else {
+                    seal.reject(CustomError.APIError(error?.localizedDescription ?? "Ocorreu um erro inesperado, por favor, tente novamente!"))
+                    return
+                }
+
+                guard let model = try? _self.decoder.decode(T.self, from: data) else {
+                    seal.reject(CustomError.mappingError("Houve um erro ao fazer o parse do modelo \(T.self)!"))
+                    return
+                }
+
+                seal.fulfill(model)
+            }).resume()
+        }
+    }
+
+}
+

iOSBooks/iOSBooks/Data/Network/Endpoint.swift

@@ -0,0 +1,18 @@
+//
+//  Endpoint.swift
+//  iOSBooks
+//
+//  Created by Guilherme Antunes Ferreira on 28/08/19.
+//  Copyright © 2019 Guilherme Antunes. All rights reserved.
+//
+
+import Foundation
+
+protocol Endpoint {
+    var path: String { get }
+    var headers: [String: String]? { get }
+    var body: Data? { get }
+    var httpMethod: String { get }
+    var request: URLRequest { get }
+    var queryItems: [URLQueryItem]? { get }
+}

iOSBooks/iOSBooks/Data/Network/Reachability.swift

@@ -0,0 +1,36 @@
+//
+//  Reachability.swift
+//  iOSBooks
+//
+//  Created by Guilherme Antunes Ferreira on 28/08/19.
+//  Copyright © 2019 Guilherme Antunes. All rights reserved.
+//
+
+import Foundation
+import SystemConfiguration
+
+class Reachability {
+    var isConnected: Bool {
+        var zeroAddress = sockaddr_in()
+        zeroAddress.sin_len = UInt8(MemoryLayout<sockaddr_in>.size)
+        zeroAddress.sin_family = sa_family_t(AF_INET)
+
+        guard let defaultRouteReachability = withUnsafePointer(to: &zeroAddress, {
+            $0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
+                SCNetworkReachabilityCreateWithAddress(nil, $0)
+            }
+        }) else {
+            return false
+        }
+
+        var flags: SCNetworkReachabilityFlags = []
+        if !SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags) {
+            return false
+        }
+
+        let isReachable = flags.contains(.reachable)
+        let needsConnection = flags.contains(.connectionRequired)
+
+        return (isReachable && !needsConnection)
+    }
+}

iOSBooks/iOSBooks/ViewController.swift

@@ -7,14 +7,9 @@
 //
 
 import UIKit
+import PromiseKit
 
 class ViewController: UIViewController {
 
-    override func viewDidLoad() {
-        super.viewDidLoad()
-        // Do any additional setup after loading the view.
-    }
-
-
 }