[#43] Victor Aceves Likes feature

Secretly.xcodeproj/project.pbxproj

@@ -56,6 +56,9 @@
 		30C77CB6266AF48300A888DC /* CurrentUser.swift in Sources */ = {isa = PBXBuildFile; fileRef = 30C77CB5266AF48300A888DC /* CurrentUser.swift */; };
 		30C77CB8266BD44300A888DC /* CreatePostViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 30C77CB7266BD44300A888DC /* CreatePostViewController.swift */; };
 		30FD0E722659645A006E309A /* Faker.swift in Sources */ = {isa = PBXBuildFile; fileRef = 30FD0E712659645A006E309A /* Faker.swift */; };
+		657AE4DF26BE032B00953718 /* Author.swift in Sources */ = {isa = PBXBuildFile; fileRef = 657AE4DE26BE032B00953718 /* Author.swift */; };
+		657AE4E126BE037300953718 /* Like.swift in Sources */ = {isa = PBXBuildFile; fileRef = 657AE4E026BE037300953718 /* Like.swift */; };
+		657AE4E926BE229E00953718 /* LikesService.swift in Sources */ = {isa = PBXBuildFile; fileRef = 657AE4E826BE229E00953718 /* LikesService.swift */; };
 		E021984723FA35E00025C28E /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = E021984623FA35E00025C28E /* AppDelegate.swift */; };
 		E021984923FA35E00025C28E /* SceneDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = E021984823FA35E00025C28E /* SceneDelegate.swift */; };
 		E021984B23FA35E00025C28E /* WelcomeViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = E021984A23FA35E00025C28E /* WelcomeViewController.swift */; };
@@ -125,6 +128,9 @@
 		30C77CB5266AF48300A888DC /* CurrentUser.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CurrentUser.swift; sourceTree = "<group>"; };
 		30C77CB7266BD44300A888DC /* CreatePostViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CreatePostViewController.swift; sourceTree = "<group>"; };
 		30FD0E712659645A006E309A /* Faker.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Faker.swift; sourceTree = "<group>"; };
+		657AE4DE26BE032B00953718 /* Author.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Author.swift; sourceTree = "<group>"; };
+		657AE4E026BE037300953718 /* Like.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Like.swift; sourceTree = "<group>"; };
+		657AE4E826BE229E00953718 /* LikesService.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LikesService.swift; sourceTree = "<group>"; };
 		E021984323FA35E00025C28E /* Secretly.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Secretly.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		E021984623FA35E00025C28E /* AppDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
 		E021984823FA35E00025C28E /* SceneDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SceneDelegate.swift; sourceTree = "<group>"; };
@@ -222,6 +228,7 @@
 				30C77CAF266AD69700A888DC /* CurrentUserService.swift */,
 				304E06C726742BDA00A99128 /* CreatePostService.swift */,
 				304E06C926742CC500A99128 /* FeedService.swift */,
+				657AE4E826BE229E00953718 /* LikesService.swift */,
 			);
 			path = Services;
 			sourceTree = "<group>";
@@ -248,6 +255,8 @@
 				307A30572661AD540020DF8B /* User.swift */,
 				30C77CB3266AF47300A888DC /* Credentials.swift */,
 				30C77CB5266AF48300A888DC /* CurrentUser.swift */,
+				657AE4DE26BE032B00953718 /* Author.swift */,
+				657AE4E026BE037300953718 /* Like.swift */,
 			);
 			path = Models;
 			sourceTree = "<group>";
@@ -445,6 +454,7 @@
 				302B5849267E658E007133E6 /* RequestError.swift in Sources */,
 				302B5846267E658E007133E6 /* AmacaConfig.swift in Sources */,
 				302BB61C267D7CC800FD74F5 /* PreviewPostVIew.swift in Sources */,
+				657AE4E126BE037300953718 /* Like.swift in Sources */,
 				3033795D267537B40066D94A /* FeedCollectionViewController+UICollectionViewDelegateFlowLayout .swift in Sources */,
 				30BC8BA82662CEBA00F7E6A5 /* Checksum.swift in Sources */,
 				30FD0E722659645A006E309A /* Faker.swift in Sources */,
@@ -453,11 +463,13 @@
 				307A305E2661CD510020DF8B /* PostCollectionViewCell.swift in Sources */,
 				302BB626267E447900FD74F5 /* PostInputViewController+UITextFieldDelegate.swift in Sources */,
 				30BC8BA02662B8A700F7E6A5 /* StorageType.swift in Sources */,
+				657AE4E926BE229E00953718 /* LikesService.swift in Sources */,
 				307A305B2661B7A20020DF8B /* FeedCollectionViewController.swift in Sources */,
 				304E06CC2674442800A99128 /* UIImage+encodeBase64.swift in Sources */,
 				30BC8BA62662C02300F7E6A5 /* CacheImage.swift in Sources */,
 				302B5847267E658E007133E6 /* StatusCode.swift in Sources */,
 				302B584B267E658E007133E6 /* RequestBuilder.swift in Sources */,
+				657AE4DF26BE032B00953718 /* Author.swift in Sources */,
 				307A306526629B990020DF8B /* AuthorView.swift in Sources */,
 				30C77CB4266AF47300A888DC /* Credentials.swift in Sources */,
 				30BC8BA22662BB0000F7E6A5 /* DataContainer.swift in Sources */,

Secretly/Models/Author.swift

@@ -0,0 +1,20 @@
+//
+//  Author.swift
+//  Secretly
+//
+//  Created by Victor Aceves on 06/08/21.
+//  Copyright © 2021 3zcurdia. All rights reserved.
+//
+
+import Foundation
+import UIKit
+
+struct Author: Restable {
+    let name: String?
+    let id: String?
+
+    init(id: String, name: String){
+        self.name = name
+        self.id = id
+    }
+}

Secretly/Models/Like.swift

@@ -0,0 +1,19 @@
+//
+//  Like.swift
+//  Secretly
+//
+//  Created by Victor Aceves on 06/08/21.
+//  Copyright © 2021 3zcurdia. All rights reserved.
+//
+
+import Foundation
+import UIKit
+
+struct Like: Restable {
+    let id: Int
+    let likeableType: String
+    let likeableId: Int
+    let createdAt: String
+    let updatedAt: String
+    let user: User
+}

Secretly/Models/Post.swift

@@ -21,8 +21,10 @@ struct Post: Restable {
     let longitude: Double?
     let createdAt: Date?
     let updatedAt: Date?
-
-    init(content: String, backgroundColor: String, latitude: Double? = nil, longitude: Double? = nil, image: UIImage? = nil) {
+    var likesCount: Int?
+    var liked: Bool?
+
+    init(content: String, backgroundColor: String, latitude: Double? = nil, longitude: Double? = nil, image: UIImage? = nil, likesCount: Int? = nil, liked:Bool?=false) {
         self.content = content
         self.backgroundColor = backgroundColor
         self.id = nil
@@ -34,8 +36,10 @@ struct Post: Restable {
         self.commentsCount = nil
         self.createdAt = nil
         self.updatedAt = nil
+        self.likesCount = likesCount
+        self.liked = liked
     }
-
+    
     func encode(to encoder: Encoder) throws {
         var container = encoder.container(keyedBy: CodingKeys.self)
         try container.encode(content, forKey: .content)
@@ -44,4 +48,10 @@ struct Post: Restable {
         try container.encode(latitude, forKey: .latitude)
         try container.encode(longitude, forKey: .longitude)
     }
+
+    mutating func toggleLike(isLiked:Bool){
+        likesCount = isLiked ? (likesCount ?? 0) + 1 : (likesCount ?? 0) - 1
+        self.liked = isLiked
+    }
+
 }

Secretly/Network/HttpResponse.swift

@@ -10,16 +10,20 @@ import Foundation
 
 struct HttpResponse {
     let httpUrlResponse: HTTPURLResponse
-
+    
     init(response: URLResponse?) {
-        self.httpUrlResponse = (response as? HTTPURLResponse) ?? HTTPURLResponse()
+        httpUrlResponse = (response as? HTTPURLResponse) ?? HTTPURLResponse()
     }
-
+    
     var status: StatusCode {
-        return StatusCode(rawValue: self.httpUrlResponse.statusCode)
+        return StatusCode(rawValue: httpUrlResponse.statusCode)
     }
-
+    
     func result(for data: Data?) -> Result<Data?, Error> {
-        return status.result().map { _ in data }
+        if let udata = data, !udata.isEmpty {
+            return status.result().map { _ in data }
+        } else {
+            return status.result().map { _ in nil }
+        }
     }
 }

Secretly/Network/RestClient.swift

@@ -20,7 +20,7 @@ typealias Restable = Codable & Identifiable
 struct RestClient<T: Restable> {
     let client: HttpClient
     let path: String
-
+    
     public var decoder: JSONDecoder = {
         let decoder = JSONDecoder()
         decoder.keyDecodingStrategy = .convertFromSnakeCase
@@ -32,56 +32,70 @@ struct RestClient<T: Restable> {
         encoder.keyEncodingStrategy = .convertToSnakeCase
         return encoder
     }()
-
+    
     func list(complete: @escaping (Result<[T], Error>) -> Void) {
         client.get(path: path) { result in
             let newResult = result.flatMap { parseList(data: $0) }
             complete(newResult)
         }
     }
-
+    
     func show(complete: @escaping (Result<T?, Error>) -> Void) {
         show("", complete: complete)
     }
-
+    
     func show(_ identifier: String, complete: @escaping (Result<T?, Error>) -> Void) {
         client.get(path: "\(path)/\(identifier)") { result in
             let newResult = result.flatMap { parse(data: $0) }
             complete(newResult)
         }
     }
-
+
+    func create(complete: @escaping (Result<T?, Error>) -> Void) throws {
+        client.post(path: path, body: nil) { result in
+            let newResult = result.flatMap { parse(data: $0) }
+            complete(newResult)
+        }
+    }
+
     func create(model: T, complete: @escaping (Result<T?, Error>) -> Void) throws {
         let data = try encoder.encode(model)
         client.post(path: path, body: data) { result in
             let newResult = result.flatMap { parse(data: $0) }
             complete(newResult)
         }
     }
-
+    
     func update(model: T, complete: @escaping (Result<T?, Error>) -> Void) throws {
         let data = try encoder.encode(model)
         client.put(path: "\(path)/\(model.id)", body: data) { result in
             let newResult = result.flatMap { parse(data: $0) }
             complete(newResult)
         }
     }
-
+
+    func delete(complete: @escaping (Result<T?, Error>) -> Void) {
+        client.delete(path: path) { result in
+            let newResult = result.flatMap { parse(data: $0) }
+            complete(newResult)
+        }
+    }
+
     func delete(model: T, complete: @escaping (Result<T?, Error>) -> Void) {
         client.delete(path: "\(path)/\(model.id)") { result in
             let newResult = result.flatMap { parse(data: $0) }
             complete(newResult)
         }
     }
-
+    
     private func parseList(data: Data?) -> Result<[T], Error> {
         if let data = data {
             return Result { try self.decoder.decode([T].self, from: data) }
         } else {
             return .success([])
         }
     }
-
+    
     private func parse(data: Data?) -> Result<T?, Error> {
         if let data = data {
             return Result { try self.decoder.decode(T.self, from: data) }

Secretly/Services/LikesService.swift

@@ -0,0 +1,37 @@
+//
+//  LikesService.swift
+//  Secretly
+//
+//  Created by Victor Aceves on 06/08/21.
+//  Copyright © 2021 3zcurdia. All rights reserved.
+//
+
+import Foundation
+
+struct LikesService {
+    private var likesEndpoint: RestClient<Like>?
+    var liked = false
+
+    init(post: Post?){
+        guard let post = post, let postId = post.id else {
+            likesEndpoint = nil
+            return
+        }
+        likesEndpoint = RestClient<Like>(client: AmacaConfig.shared.httpClient, path: "/api/v1/posts/\(postId)/likes")
+        liked = post.liked ?? false
+    }
+
+    mutating func toggleLike(complete: @escaping (Result<Like?, Error>) -> Void) {
+        if liked {
+            liked = !liked
+            likesEndpoint?.delete { result in
+                DispatchQueue.main.async { complete(result) }
+            }
+        } else {
+            liked = !liked
+            try? likesEndpoint?.create { result in
+                DispatchQueue.main.async { complete(result) }
+            }
+        }
+    }
+}

Secretly/Views/PostCollectionViewCell.swift

@@ -10,21 +10,24 @@ import UIKit
 
 class PostCollectionViewCell: UICollectionViewCell {
     static let reuseIdentifier = "feedPostCell"
+    var likesService: LikesService?
     var post: Post? {
         didSet {
-           updateView()
+            updateView()
+            likesService = LikesService(post: post)
         }
     }
     @IBOutlet weak var authorView: AuthorView!
     @IBOutlet weak var contentLabel: UILabel!
     @IBOutlet weak var imageView: UIImageView!
-    @IBOutlet weak var likeState: UIImageView!
     @IBOutlet weak var commentCounter: UILabel!
-
+    @IBOutlet weak var likesCounter: UILabel!
+    @IBOutlet weak var btnLike: UIButton!
+
     override func awakeFromNib() {
         super.awakeFromNib()
     }
-
+    
     func updateView() {
         imageView.image = nil
         guard let post = post else { return }
@@ -37,5 +40,30 @@ class PostCollectionViewCell: UICollectionViewCell {
             ImageLoader.load(postImg.mediumUrl) { img in self.imageView.image = img }
         }
         self.authorView.author = post.user
+        // Update likes counter label
+        self.likesCounter.text = "\(post.likesCount ?? 0) Me gusta"
+        // Update like image
+        if post.liked ?? false{
+            btnLike.setImage(UIImage(systemName: "heart.fill"), for: .normal)
+        } else{
+            btnLike.setImage(UIImage(systemName: "heart"), for: .normal)
+        }
+    }
+
+    @IBAction func toggleLike(_ sender: UIButton) {
+        likesService?.toggleLike { [unowned self] result in
+            switch result {
+            case .success(nil):
+                btnLike.setImage(UIImage(systemName: "heart"), for: .normal)
+                post?.toggleLike(isLiked: false)
+            case .success:
+                btnLike.setImage(UIImage(systemName: "heart.fill"), for: .normal)
+                post?.toggleLike(isLiked: true)
+            case .failure:
+                print("Failure request \(result)")
+            }
+            self.likesCounter.text = "\(post?.likesCount ?? 0) Me gusta"
+        }
     }
+
 }