iOSLabUNAM · Yuto-Oro · Sep 24, 2021
diff --git a/Secretly.xcodeproj/project.pbxproj b/Secretly.xcodeproj/project.pbxproj
@@ -7,6 +7,8 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		1445C8C226EAD8C600769390 /* Like.swift in Sources */ = {isa = PBXBuildFile; fileRef = 1445C8C126EAD8C600769390 /* Like.swift */; };
+		1445C8C626EAD9F700769390 /* LikeService.swift in Sources */ = {isa = PBXBuildFile; fileRef = 1445C8C526EAD9F700769390 /* LikeService.swift */; };
 		302B5845267E658E007133E6 /* HttpResponse.swift in Sources */ = {isa = PBXBuildFile; fileRef = 302B583D267E658E007133E6 /* HttpResponse.swift */; };
 		302B5846267E658E007133E6 /* AmacaConfig.swift in Sources */ = {isa = PBXBuildFile; fileRef = 302B583E267E658E007133E6 /* AmacaConfig.swift */; };
 		302B5847267E658E007133E6 /* StatusCode.swift in Sources */ = {isa = PBXBuildFile; fileRef = 302B583F267E658E007133E6 /* StatusCode.swift */; };
@@ -76,6 +78,8 @@
 /* End PBXContainerItemProxy section */
 
 /* Begin PBXFileReference section */
+		1445C8C126EAD8C600769390 /* Like.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Like.swift; sourceTree = "<group>"; };
+		1445C8C526EAD9F700769390 /* LikeService.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LikeService.swift; sourceTree = "<group>"; };
 		302B583D267E658E007133E6 /* HttpResponse.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = HttpResponse.swift; sourceTree = "<group>"; };
 		302B583E267E658E007133E6 /* AmacaConfig.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = AmacaConfig.swift; sourceTree = "<group>"; };
 		302B583F267E658E007133E6 /* StatusCode.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = StatusCode.swift; sourceTree = "<group>"; };
@@ -222,6 +226,7 @@
 				30C77CAF266AD69700A888DC /* CurrentUserService.swift */,
 				304E06C726742BDA00A99128 /* CreatePostService.swift */,
 				304E06C926742CC500A99128 /* FeedService.swift */,
+				1445C8C526EAD9F700769390 /* LikeService.swift */,
 			);
 			path = Services;
 			sourceTree = "<group>";
@@ -248,6 +253,7 @@
 				307A30572661AD540020DF8B /* User.swift */,
 				30C77CB3266AF47300A888DC /* Credentials.swift */,
 				30C77CB5266AF48300A888DC /* CurrentUser.swift */,
+				1445C8C126EAD8C600769390 /* Like.swift */,
 			);
 			path = Models;
 			sourceTree = "<group>";
@@ -428,6 +434,7 @@
 				E021984B23FA35E00025C28E /* WelcomeViewController.swift in Sources */,
 				3072FBDF2680FA5A00B35C8C /* ImageProcessor.swift in Sources */,
 				302BB622267E38E800FD74F5 /* PostInputViewController+UIImagePickerControllerDelegate.swift in Sources */,
+				1445C8C226EAD8C600769390 /* Like.swift in Sources */,
 				302B5845267E658E007133E6 /* HttpResponse.swift in Sources */,
 				302B584A267E658E007133E6 /* RestClient.swift in Sources */,
 				302B5848267E658E007133E6 /* HttpClient.swift in Sources */,
@@ -466,6 +473,7 @@
 				30C77CB6266AF48300A888DC /* CurrentUser.swift in Sources */,
 				302BB624267E3A8700FD74F5 /* PostInputViewController+UIColorPickerViewControllerDelegate.swift in Sources */,
 				304E06CF267468DA00A99128 /* UIColor+Pastel.swift in Sources */,
+				1445C8C626EAD9F700769390 /* LikeService.swift in Sources */,
 				304E06C42674133D00A99128 /* String+isBlank.swift in Sources */,
 				30BC8BA42662BDEF00F7E6A5 /* ImageStore.swift in Sources */,
 				3033795B267537490066D94A /* FeedCollectionViewController+UICollectionViewDataSourcePrefetching.swift in Sources */,

diff --git a/Secretly/Models/Like.swift b/Secretly/Models/Like.swift
@@ -0,0 +1,19 @@
+//
+//  Like.swift
+//  Secretly
+//
+//  Created by Orlando Ortega on 09/09/21.
+//  Copyright © 2021 3zcurdia. All rights reserved.
+//
+
+import Foundation
+
+struct Like: Restable {
+    let id: Int
+    let createdAt, updatedAt: String
+
+    func encode(to encoder: Encoder) throws {
+        var container = encoder.container(keyedBy: CodingKeys.self)
+        try container.encode(id, forKey: .id)
+    }
+}
diff --git a/Secretly/Models/Post.swift b/Secretly/Models/Post.swift
@@ -21,8 +21,10 @@ struct Post: Restable {
     let longitude: Double?
     let createdAt: Date?
     let updatedAt: Date?
+    var likeCount: Int?
+    var liked: Bool?
 
-    init(content: String, backgroundColor: String, latitude: Double? = nil, longitude: Double? = nil, image: UIImage? = nil) {
+    init(content: String, backgroundColor: String, latitude: Double? = nil, longitude: Double? = nil, image: UIImage? = nil, likesCount: Int? = nil, isLiked: Bool? = false) {
         self.content = content
         self.backgroundColor = backgroundColor
         self.id = nil
@@ -34,6 +36,8 @@ struct Post: Restable {
         self.commentsCount = nil
         self.createdAt = nil
         self.updatedAt = nil
+        self.likeCount = nil
+        self.liked = isLiked
     }
 
     func encode(to encoder: Encoder) throws {
@@ -43,5 +47,17 @@ struct Post: Restable {
         try container.encode(imageData, forKey: .imageData)
         try container.encode(latitude, forKey: .latitude)
         try container.encode(longitude, forKey: .longitude)
+        try container.encode(likeCount, forKey: .likeCount)
+        try container.encode(liked, forKey: .liked)
+    }
+
+    mutating func onLikeOrDislike(likeOrUnlike lou: Bool) {
+        if lou {
+            likeCount = (likeCount ?? 0) + 1
+            liked = true
+        } else {
+            likeCount = (likeCount ?? 0) - 1
+            liked = false
+        }
     }
 }
diff --git a/Secretly/Network/HttpResponse.swift b/Secretly/Network/HttpResponse.swift
@@ -20,6 +20,10 @@ struct HttpResponse {
     }
 
     func result(for data: Data?) -> Result<Data?, Error> {
-        return status.result().map { _ in data }
+        if let data = data, !data.isEmpty {
+            return status.result().map { (_) in data }
+        } else {
+            return status.result().map { _ in nil}
+        }
     }
 }
diff --git a/Secretly/Network/RestClient.swift b/Secretly/Network/RestClient.swift
@@ -58,6 +58,13 @@ struct RestClient<T: Restable> {
             complete(newResult)
         }
     }
+
+    func create(complete: @escaping (Result<T?, Error>) -> Void) throws {
+        client.post(path: path, body: nil) { (result) in
+            let res = result.flatMap { parse(data: $0) }
+            complete(res)
+        }
+    }
 
     func update(model: T, complete: @escaping (Result<T?, Error>) -> Void) throws {
         let data = try encoder.encode(model)
@@ -73,6 +80,13 @@ struct RestClient<T: Restable> {
             complete(newResult)
         }
     }
+
+    func delete(complete: @escaping (Result<T?, Error>) -> Void) throws {
+        client.delete(path: path) { (result) in
+            let res = result.flatMap { parse(data: $0) }
+            complete(res)
+        }
+    }
 
     private func parseList(data: Data?) -> Result<[T], Error> {
         if let data = data {

diff --git a/Secretly/Services/LikeService.swift b/Secretly/Services/LikeService.swift
@@ -0,0 +1,41 @@
+//
+//  LikeService.swift
+//  Secretly
+//
+//  Created by Orlando Ortega on 09/09/21.
+//  Copyright © 2021 3zcurdia. All rights reserved.
+//
+
+import Foundation
+
+struct LikeService {
+    var likeEndpoint: RestClient<Like>?
+    var isLiked = false
+
+    init(post: Post?) {
+        guard let post = post, let postId = post.id else {
+            self.likeEndpoint = nil
+            return
+        }
+        self.likeEndpoint = RestClient<Like>(client: AmacaConfig.shared.httpClient, path: "/api/v1/posts/\(postId)/like")
+        isLiked = post.liked ?? false
+    }
+
+    mutating func likeOrDislikePost(complete: @escaping(Result<Like?, Error>) -> Void) {
+        if !isLiked {
+            isLiked = !isLiked
+            try? likeEndpoint?.create(complete: { (res) in
+                DispatchQueue.main.async {
+                    complete(res)
+                }
+            })
+        } else {
+            isLiked = !isLiked
+            try? likeEndpoint?.delete(complete: { (res) in
+                DispatchQueue.main.async {
+                    complete(res)
+                }
+            })
+        }
+    }
+}
diff --git a/Secretly/Views/PostCollectionViewCell.swift b/Secretly/Views/PostCollectionViewCell.swift
@@ -10,16 +10,19 @@ import UIKit
 
 class PostCollectionViewCell: UICollectionViewCell {
     static let reuseIdentifier = "feedPostCell"
+    var likeService: LikeService?
     var post: Post? {
         didSet {
            updateView()
+            likeService = LikeService(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 likeCount: UILabel!
+    @IBOutlet weak var likeBtn: UIButton!
 
     override func awakeFromNib() {
         super.awakeFromNib()
@@ -38,4 +41,32 @@ class PostCollectionViewCell: UICollectionViewCell {
         }
         self.authorView.author = post.user
     }
+
+    @IBAction func onLikeTapped(_ sender: UIButton) {
+        var lod = false
+        likeService?.likeOrDislikePost(complete: { [unowned self] res in
+            switch res {
+            case .success(nil):
+                likeBtn.setImage(UIImage(systemName: "heart"), for: .normal)
+                post?.onLikeOrDislike(likeOrUnlike: lod)
+                lod = !lod
+                if(post?.likeCount ?? 0 > 0) {
+                    self.likeCount.text = "\(post?.likeCount ?? 0) Likes"
+                } else {
+                    self.likeCount.text = ""
+                }
+            case .success:
+                likeBtn.setImage(UIImage(systemName: "heart.fill"), for: .normal)
+                post?.onLikeOrDislike(likeOrUnlike: lod)
+                lod = !lod
+                if(post?.likeCount ?? 0 > 0) {
+                    self.likeCount.text = "\(post?.likeCount ?? 0) Likes"
+                } else {
+                    self.likeCount.text = ""
+                }
+            case .failure:
+                print("Request failed, cause: \(res)")
+            }
+        })
+    }
 }
diff --git a/Secretly/Views/PostCollectionViewCell.xib b/Secretly/Views/PostCollectionViewCell.xib
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="18122" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="17701" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES">
     <device id="retina6_1" orientation="portrait" appearance="light"/>
     <dependencies>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="18093"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="17703"/>
         <capability name="Safe area layout guides" minToolsVersion="9.0"/>
         <capability name="System colors in document resources" minToolsVersion="11.0"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
@@ -30,14 +30,6 @@
                         <color key="textColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
                         <nil key="highlightedColor"/>
                     </label>
-                    <imageView clipsSubviews="YES" userInteractionEnabled="NO" contentMode="scaleAspectFit" horizontalHuggingPriority="251" verticalHuggingPriority="251" image="heart" catalog="system" translatesAutoresizingMaskIntoConstraints="NO" id="qBu-h3-372">
-                        <rect key="frame" x="3" y="278.5" width="20" height="17.5"/>
-                        <color key="tintColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
-                        <constraints>
-                            <constraint firstAttribute="width" constant="20" id="FZr-RK-fSl"/>
-                            <constraint firstAttribute="height" constant="20" id="aph-kx-k7x"/>
-                        </constraints>
-                    </imageView>
                     <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="1200 " lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="ier-Sw-bbQ">
                         <rect key="frame" x="370" y="282" width="27" height="12"/>
                         <constraints>
@@ -62,36 +54,58 @@
                             <constraint firstAttribute="height" constant="40" id="FP9-i4-4aV"/>
                         </constraints>
                     </view>
+                    <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="RIs-k8-OnQ">
+                        <rect key="frame" x="0.0" y="267" width="33" height="33"/>
+                        <color key="tintColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                        <state key="normal" image="heart" catalog="system"/>
+                        <connections>
+                            <action selector="onLikeTapped:" destination="gTV-IL-0wX" eventType="touchUpInside" id="zfx-2t-wDs"/>
+                        </connections>
+                    </button>
+                    <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="3 Likes" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="TYg-Lb-wVt">
+                        <rect key="frame" x="33" y="267" width="97" height="33"/>
+                        <color key="tintColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                        <fontDescription key="fontDescription" type="system" pointSize="10"/>
+                        <color key="textColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                        <nil key="highlightedColor"/>
+                    </label>
                 </subviews>
             </view>
             <viewLayoutGuide key="safeArea" id="ZTg-uK-7eu"/>
             <constraints>
                 <constraint firstAttribute="trailing" secondItem="gUg-yt-vKP" secondAttribute="trailing" id="1Ox-jh-Fdw"/>
+                <constraint firstItem="RIs-k8-OnQ" firstAttribute="leading" secondItem="gTV-IL-0wX" secondAttribute="leading" id="4Ct-Mr-cnQ"/>
+                <constraint firstItem="RIs-k8-OnQ" firstAttribute="top" secondItem="Mh0-Gr-U1B" secondAttribute="bottom" constant="102.5" id="8sa-Ow-t6r"/>
                 <constraint firstItem="LcI-IM-E3b" firstAttribute="leading" secondItem="gTV-IL-0wX" secondAttribute="leading" id="ALT-n0-JLg"/>
                 <constraint firstAttribute="trailing" secondItem="ier-Sw-bbQ" secondAttribute="trailing" constant="3" id="Chd-rw-tMw"/>
+                <constraint firstItem="TYg-Lb-wVt" firstAttribute="top" secondItem="Mh0-Gr-U1B" secondAttribute="bottom" constant="102.5" id="Okx-Ta-vYn"/>
                 <constraint firstItem="LcI-IM-E3b" firstAttribute="top" secondItem="gTV-IL-0wX" secondAttribute="top" id="Saq-lM-0ue"/>
                 <constraint firstAttribute="trailing" secondItem="Mh0-Gr-U1B" secondAttribute="trailing" constant="20" id="TmC-rH-rgp"/>
+                <constraint firstItem="Zus-SL-Va3" firstAttribute="leading" secondItem="TYg-Lb-wVt" secondAttribute="trailing" constant="217" id="UVS-sM-De5"/>
                 <constraint firstItem="gUg-yt-vKP" firstAttribute="leading" secondItem="gTV-IL-0wX" secondAttribute="leading" id="Udj-7I-U3z"/>
-                <constraint firstItem="qBu-h3-372" firstAttribute="leading" secondItem="gTV-IL-0wX" secondAttribute="leading" constant="3" id="Wk2-tC-y2S"/>
                 <constraint firstItem="Mh0-Gr-U1B" firstAttribute="centerY" secondItem="gTV-IL-0wX" secondAttribute="centerY" id="cdi-uV-CwA"/>
                 <constraint firstAttribute="bottom" secondItem="ier-Sw-bbQ" secondAttribute="bottom" constant="6" id="dEi-5s-5Xo"/>
                 <constraint firstItem="ier-Sw-bbQ" firstAttribute="leading" secondItem="Zus-SL-Va3" secondAttribute="trailing" constant="3" id="dc0-TJ-Axz"/>
+                <constraint firstItem="Zus-SL-Va3" firstAttribute="leading" secondItem="RIs-k8-OnQ" secondAttribute="trailing" constant="314" id="eWt-0a-DAa"/>
                 <constraint firstAttribute="bottom" secondItem="LcI-IM-E3b" secondAttribute="bottom" id="ic7-9y-GCI"/>
                 <constraint firstItem="gUg-yt-vKP" firstAttribute="top" secondItem="gTV-IL-0wX" secondAttribute="top" id="mch-9a-c32"/>
                 <constraint firstAttribute="trailing" secondItem="LcI-IM-E3b" secondAttribute="trailing" id="mm7-gQ-FEH"/>
                 <constraint firstItem="Mh0-Gr-U1B" firstAttribute="leading" secondItem="gTV-IL-0wX" secondAttribute="leading" constant="20" id="pwh-eS-Ehf"/>
+                <constraint firstAttribute="bottom" secondItem="RIs-k8-OnQ" secondAttribute="bottom" id="sS3-rd-WFF"/>
                 <constraint firstAttribute="bottom" secondItem="Zus-SL-Va3" secondAttribute="bottom" constant="2" id="t8V-mY-lku"/>
-                <constraint firstAttribute="bottom" secondItem="qBu-h3-372" secondAttribute="bottom" constant="3" id="wei-7x-Bcq"/>
+                <constraint firstItem="TYg-Lb-wVt" firstAttribute="leading" secondItem="RIs-k8-OnQ" secondAttribute="trailing" id="wrj-W6-uNa"/>
+                <constraint firstAttribute="bottom" secondItem="TYg-Lb-wVt" secondAttribute="bottom" id="yVA-18-afy"/>
             </constraints>
             <size key="customSize" width="400" height="300"/>
             <connections>
                 <outlet property="authorView" destination="gUg-yt-vKP" id="cZF-pT-x7d"/>
                 <outlet property="commentCounter" destination="ier-Sw-bbQ" id="Kr2-a4-New"/>
                 <outlet property="contentLabel" destination="Mh0-Gr-U1B" id="tTs-p1-j7k"/>
                 <outlet property="imageView" destination="LcI-IM-E3b" id="vWk-OE-zm9"/>
-                <outlet property="likeState" destination="qBu-h3-372" id="Qyd-rc-8ZQ"/>
+                <outlet property="likeBtn" destination="RIs-k8-OnQ" id="SrG-GA-TWO"/>
+                <outlet property="likeCount" destination="TYg-Lb-wVt" id="R0c-q4-7Wq"/>
             </connections>
-            <point key="canvasLocation" x="389.85507246376812" y="182.8125"/>
+            <point key="canvasLocation" x="92.753623188405811" y="148.66071428571428"/>
         </collectionViewCell>
     </objects>
     <resources>