Desafio por Esdras Emanuel

.gitignore

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+# Xcode
+#
+## Build generated
+build/
+DerivedData/
+
+## Various settings
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+xcuserdata/
+
+## Other
+*.moved-aside
+*.xccheckout
+*.xcscmblueprint
+
+## Obj-C/Swift specific
+*.hmap
+*.ipa
+*.dSYM.zip
+*.dSYM
+
+## Playgrounds
+timeline.xctimeline
+playground.xcworkspace
+
+# Swift Package Manager
+.build/
+
+#Custom
+/mockup-ios.png

JavaPop/JavaPop.xcodeproj/xcuserdata/EsdrasEVT.xcuserdatad/xcschemes/xcschememanagement.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>SchemeUserState</key>
+	<dict>
+		<key>JavaPop.xcscheme</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>7</integer>
+		</dict>
+	</dict>
+</dict>
+</plist>

JavaPop/JavaPop/Controller/AppDelegate.swift

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+//
+//  AppDelegate.swift
+//  JavaPop
+//
+//  Created by Esdras Emanuel on 20/10/17.
+//  Copyright © 2017 evtApps. All rights reserved.
+//
+
+import UIKit
+import CoreData
+
+@UIApplicationMain
+class AppDelegate: UIResponder, UIApplicationDelegate {
+
+    var window: UIWindow?
+
+
+    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
+        // Override point for customization after application launch.
+        return true
+    }
+
+    func applicationWillResignActive(_ application: UIApplication) {
+        // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
+        // Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game.
+    }
+
+    func applicationDidEnterBackground(_ application: UIApplication) {
+        // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
+        // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
+    }
+
+    func applicationWillEnterForeground(_ application: UIApplication) {
+        // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
+    }
+
+    func applicationDidBecomeActive(_ application: UIApplication) {
+        // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
+    }
+
+    func applicationWillTerminate(_ application: UIApplication) {
+        // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
+        // Saves changes in the application's managed object context before the application terminates.
+        //        self.saveContext() //TODO: USED FOR CORE DATA, CHECK
+    }
+
+//    // MARK: - Core Data stack
+//
+//    lazy var persistentContainer: NSPersistentContainer = {
+//        /*
+//         The persistent container for the application. This implementation
+//         creates and returns a container, having loaded the store for the
+//         application to it. This property is optional since there are legitimate
+//         error conditions that could cause the creation of the store to fail.
+//        */
+//        let container = NSPersistentContainer(name: "JavaPop")
+//        container.loadPersistentStores(completionHandler: { (storeDescription, error) in
+//            if let error = error as NSError? {
+//                // Replace this implementation with code to handle the error appropriately.
+//                // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
+//                 
+//                /*
+//                 Typical reasons for an error here include:
+//                 * The parent directory does not exist, cannot be created, or disallows writing.
+//                 * The persistent store is not accessible, due to permissions or data protection when the device is locked.
+//                 * The device is out of space.
+//                 * The store could not be migrated to the current model version.
+//                 Check the error message to determine what the actual problem was.
+//                 */
+//                fatalError("Unresolved error \(error), \(error.userInfo)")
+//            }
+//        })
+//        return container
+//    }()
+//
+//    // MARK: - Core Data Saving support
+//
+//    func saveContext () {
+//        let context = persistentContainer.viewContext
+//        if context.hasChanges {
+//            do {
+//                try context.save()
+//            } catch {
+//                // Replace this implementation with code to handle the error appropriately.
+//                // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
+//                let nserror = error as NSError
+//                fatalError("Unresolved error \(nserror), \(nserror.userInfo)")
+//            }
+//        }
+//    }
+
+}
+

JavaPop/JavaPop/Controller/MainVC.swift

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+//
+//  ViewController.swift
+//  JavaPop
+//
+//  Created by Esdras Emanuel on 20/10/17.
+//  Copyright © 2017 evtApps. All rights reserved.
+//
+
+import UIKit
+import Alamofire
+import ObjectMapper
+import AlamofireObjectMapper
+
+class MainVC: UITableViewController{
+    private let cellId = "RepositoryCell"
+    private var repos = [Repository]() //object that will hold repositories data
+    private var nextUrl = "https://api.github.com/search/repositories?q=language:Java&sort=stars&page=1" //first url to be requested on API
+    private var lastUrl : String? // will hold what would be the last "page" provided by API
+    private var info = ["", ""] // used to pass information when performing a Segue to PullReqVC
+    private var lastPageReached = false // will be true whenever the last page provided by the API is reached
+
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        // Do any additional setup after loading the view, typically from a nib.
+
+        tableView.rowHeight = 150
+        tableView.isPagingEnabled = true
+
+        loadData(url: nextUrl)
+
+        let nib = UINib(nibName: "RepositoryCellNib", bundle: nil)
+        tableView.register(nib, forCellReuseIdentifier: cellId)
+
+    }
+
+    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
+        guard let cell = tableView.dequeueReusableCell(withIdentifier: cellId, for: indexPath) as? RepositoryCell else{
+            return UITableViewCell()
+        }
+
+        if repos.count > 0{
+
+            //add info from API to tableViewCells
+            let index = indexPath.row
+            let repo = repos[index]
+            cell.nameLbl.text = repo.name
+            cell.descTxt.text = repo.description
+            cell.userLbl.text = repo.owner?.username
+            if let forks = repo.forks{
+                cell.setForks(value: forks)
+            }else{
+                cell.setForks(value: 0)
+            }
+
+            if let stars = repo.stargazers_count{
+                cell.setStars(value: stars)
+            }else{
+                cell.setStars(value: 0)
+            }
+
+            if let link = repo.owner?.avatarUrl{
+                cell.userImg.downloadedFrom(link: link)
+            }
+
+        }
+
+        return cell
+    }
+
+    override func numberOfSections(in tableView: UITableView) -> Int {
+        return 1
+    }
+
+    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
+        return repos.count
+    }
+
+    override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
+        return 150
+    }
+
+    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
+        if let repo = repos[indexPath.row].name{
+            self.info[0] = repo
+        }
+        if let name = repos[indexPath.row].owner?.username{
+            self.info[1] = name
+        }
+
+
+        self.performSegue(withIdentifier: "MainVCPullReqVC", sender: info)
+    }
+
+    override func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
+        if indexPath.row >= repos.count * 3/4{
+            loadData(url: nextUrl)
+        }
+    }
+
+    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
+        if let destination = segue.destination as? PullReqVC{
+            if let info = sender as? [String]{
+                destination.nextUrl = "https://api.github.com/repos/\(info[1])/\(info[0])/pulls"
+            }
+
+        }
+    }
+
+    func loadData(url : String){
+        if !lastPageReached{
+            let URL = url
+            Alamofire.request(URL).responseObject { (response: DataResponse<SearchResponse>) in
+                switch response.result{
+                case .success( _) : do {
+                    if let headers = response.response?.allHeaderFields{
+                        if self.lastUrl == nil{ //add lastUrl if not added yet according to info provided by API
+                            self.lastUrl = DataService.instance.lastPageLinkFrom(headers: headers)
+                        }
+                        self.nextUrl = DataService.instance.nextPageLinkFrom(headers: headers) //update nextUrl to be requested
+                        let searchResponse = response.result.value
+                        if let searchItems = searchResponse?.items{
+                            for item in searchItems {
+                                self.repos.append(item)
+                            }
+                        }
+                        self.tableView.reloadData()
+                    }
+                        }
+                case .failure(let error) : do {
+                    self.presentConnectionError(message: error.localizedDescription)
+                    }
+                }
+
+            }
+            if let lastUrl = self.lastUrl{
+                if URL == lastUrl{ //check if lasPageReached
+                    self.lastPageReached = true
+                }
+            }
+        }
+    }
+
+    func nextPageLinkFrom(headers: [AnyHashable : Any]) -> String{
+        var res = String()
+        if let link = headers["Link"] as? String{
+            let linkArr = link.components(separatedBy: " ")
+            res = linkArr[0]
+            res.removeFirst()
+            res.removeLast()
+            res.removeLast()
+        }
+        return res
+    }
+
+    func presentConnectionError(message: String){
+        let alert = UIAlertController(title: "Error", message: message, preferredStyle: .alert)
+        let okAction = UIAlertAction(title: "Retry", style: .cancel, handler:{(action: UIAlertAction!) in
+            self.loadData(url: self.nextUrl)
+        })
+        alert.addAction(okAction)
+        UIApplication.shared.keyWindow?.rootViewController?.present(alert, animated: true, completion: nil)
+    }
+
+//MARK: Methods for Unit Testing
+
+    func isInLastPage() -> Bool{
+        if lastPageReached{
+            return true
+        }else{
+            return false
+        }
+    }
+
+    func setLastUrl(url : String){
+        self.lastUrl = url
+    }
+
+}
+
+//MARK: JSON Mapping Classes
+
+class SearchResponse : Mappable{
+
+    var items : [Repository]?
+
+    required init?(map: Map) {
+
+    }
+
+    func mapping(map: Map) {
+        items <- map["items"]
+    }
+
+}
+
+
+class Repository : Mappable{
+    var name : String?
+    var owner : User?
+    var description : String?
+    var forks : Int?
+    var stargazers_count : Int?
+
+    required init?(map: Map){
+    }
+
+    func mapping(map: Map) {
+        name <- map["name"]
+        owner <- map["owner"]
+        forks <- map["forks"]
+        description <- map["description"]
+        stargazers_count <- map["stargazers_count"]
+    }
+}
+
+class User : Mappable{
+
+    var username : String?
+    var avatarUrl : String?
+
+    required init?(map: Map) {
+
+    }
+
+    func mapping(map: Map) {
+        username <- map["login"]
+        avatarUrl <- map["avatar_url"]
+    }
+}
+