Search implementation and a bit of refactoring.

1Weather/UI/View controllers/Location/LocationViewController.swift

@@ -94,7 +94,7 @@ private extension SavedCitiesViewController {
     
     func prepareSearchBar() {
         searchBar.searchBarStyle = .minimal
-        searchBar.placeholder = "Search"
+        searchBar.placeholder = "Search".localized(comment: "Search bar placeholder text.")
         view.addSubview(searchBar)
         searchBar.snp.makeConstraints { (make) in
             make.top.equalToSuperview()
@@ -143,12 +143,12 @@ private extension SavedCitiesViewController {
 //MARK: UItableView Data Source
 extension SavedCitiesViewController: UITableViewDataSource {
     func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
-        return locationsViewModel.savedCities.count
+        return locationsViewModel.cities.count
     }
     
     func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
         let cell = tableView.dequeueReusableCell(withIdentifier: CityCell.kIdentifier, for: indexPath) as! CityCell
-        cell.configure(geoName: locationsViewModel.savedCities[indexPath.row],
+        cell.configure(geoName: locationsViewModel.cities[indexPath.row],
                        mode: locationsViewModel.displayMode)
         return cell
     }
@@ -161,7 +161,7 @@ extension SavedCitiesViewController: UITableViewDelegate {
         container.backgroundColor = ThemeManager.currentTheme.navigationBarBackgroundColor
         
         let titleLabel = UILabel()
-        titleLabel.text = "Saved Cities (\(self.locationsViewModel.savedCities.count))"
+        titleLabel.text =  "Saved Cities".localized + "( \(self.locationsViewModel.cities.count))"
         titleLabel.font = AppFont.SFPro.bold(size: 24)
         titleLabel.textColor = ThemeManager.currentTheme.primaryTextColor
         container.addSubview(titleLabel)

1Weather/UI/View controllers/Location/LocationsViewModel.swift

@@ -6,6 +6,7 @@
 //
 
 import UIKit
+import AlgoliaSearchClient
 
 protocol LocationsViewModelDelegate:class {
     func viewModelDidChange(model:LocationsViewModel)
@@ -22,7 +23,12 @@ enum LocationsViewModelDisplayMode {
 class LocationsViewModel {
     //Public
     weak var delegate:LocationsViewModelDelegate?
-    private(set) var savedCities = [GeoNamesPlace]()
+    private(set) var cities = [GeoNamesPlace]() {
+        didSet {
+            assert(Thread.isMainThread)
+            self.delegate?.viewModelDidChange(model: self)
+        }
+    }
     private(set) var displayMode:LocationsViewModelDisplayMode = .savedCities
     
     init() {
@@ -49,28 +55,93 @@ class LocationsViewModel {
         kazan.city = "Kazan"
         kazan.stateCode = "000000"
         kazan.country = "Russia"
-        savedCities = [perm, moscow, sp, kazan]
+        cities = [perm, moscow, sp, kazan]
     }
     
     func fetchCities(query:String) {
-        //Some fetching method
         
-        //Tell delegate to refresh UI
-        self.delegate?.viewModelDidChange(model: self)
+        // This is a test location that can be interpreted on the server to return all alerts
+        guard query != "1wville" else {
+            let fakePlace = GeoNamesPlace()
+            fakePlace.latitude = "67.25639"
+            fakePlace.longitude = "-150.18417"
+            fakePlace.city = "1WVille"
+            fakePlace.state = "Alaska"
+            fakePlace.stateCode = "AK"
+            fakePlace.country = "United States"
+            fakePlace.countryCode = "US"
+            fakePlace.fcodeName = "populated place"
+            fakePlace.toponymName = "1WVille"
+            fakePlace.isMyLocation = false
+            
+            DispatchQueue.main.async {
+                self.cities = []
+            }
+            return
+        }
+        
+        Logger.minSeverityLevel = .warning
+        var algoliaQuery = PlacesQuery(query)
+        algoliaQuery.aroundLatLngViaIP = true
+        algoliaQuery.type = .city
+        let placesClient: PlacesClient = PlacesClient(appID: ApplicationID (rawValue: kAlgoliaAppId),
+                                                     apiKey: APIKey(rawValue: kAlgoliaAPIKey))
+        let language: Language = Language(rawValue: NSLocale.preferredLanguages.first?.components(separatedBy: "-").first ?? "en")
+        print("Search: using language \(language.rawValue)")
+        
+        var filteredPlaces = [GeoNamesPlace]()
+        
+        placesClient.search(query: algoliaQuery, language: language, requestOptions: nil) { (result: Result<PlacesClient.SingleLanguageResponse, Error>) in
+            switch (result) {
+            case .success(let response):
+                print("Search: got \(response.nbHits) results")
+                for hit: Hit<Place> in response.hits {
+                    let place = GeoNamesPlace()
+                    if hit.object.localeNames?.first == nil {
+                        print("Search: skip 1 object.");
+                        continue
+                    }
+                    
+                    place.city = hit.object.localeNames?.first
+                    place.state = hit.object.administrative?.first
+                    place.country = hit.object.country ?? "" // ?? "" part is from the Android code, may be not needed on iOS
+                    place.countryCode = hit.object.countryCode?.rawValue.uppercased() ?? "" // ?? "" part is from the Android code, may be not needed on iOS
+                    if let geolocation = hit.geolocation {
+                        place.latitude = "\(geolocation.latitude)"
+                        place.longitude = "\(geolocation.longitude)"
+                    }
+                    else {
+                        place.latitude = ""
+                        place.longitude = ""
+                    }
+                    
+                    filteredPlaces.append(place)
+                }
+                DispatchQueue.main.async {
+                    self.cities = filteredPlaces
+                }
+                break
+            case .failure(let error):
+                DispatchQueue.main.async {
+                    self.delegate?.viewModel(model: self, errorHasOccured: error)
+                }
+                break
+            }
+        }
     }
     
     func add(city:GeoNamesPlace) {
-        //Tell delegate to refresh UI
-        self.delegate?.viewModelDidChange(model: self)
+        // TODO: Just update self.cities, it will trigger a viewModelDidChange call
+        
+        
     }
     
     func delete(city:GeoNamesPlace) {
-        //Tell delegate to refresh UI
-        self.delegate?.viewModelDidChange(model: self)
+        // TODO:  Just update self.cities, it will trigger a viewModelDidChange call
     }
     
     func select(city:GeoNamesPlace) {
-        //Tell delegate to refresh UI
+        // TODO: Tell delegate to refresh UI
         self.delegate?.viewModelDidChange(model: self)
     }
 }