feat: Improve country picker selection

Sources/Earthquake Network/Controllers/Seismic Networks/SeismicSettingsViewController.swift

@@ -44,10 +44,13 @@ class SeismicSettingsViewController: UIViewController {
         
         // load saved country (if exists)
         let savedCountry = UserDefaults.standard.object(forKey: IMPOSTAZIONE_NAZIONE_RETI_SISMICHE) as? String
-        countryTextField.text = EQNData.seismic(for: savedCountry)?.country
+        selectedNetwork = EQNData.seismic(for: savedCountry)
         
+        countryTextField.text = selectedNetwork?.country
         countryTextField.inputView = picker.view
-        picker.configure(with: networks) { [unowned self] (network) in
+        
+        let selectedIndex: Int? = selectedNetwork != nil ? networks.firstIndex(of: selectedNetwork!) : nil
+        picker.configure(with: networks, selectedIndex: selectedIndex) { [unowned self] (network) in
             guard let network = network as? EQNSeismicNetwork else { return }
             
             self.view.endEditing(true)

Sources/Earthquake Network/Controllers/Shared/EQNGenericPickerViewController.swift

@@ -68,11 +68,16 @@ class EQNGenericPickerViewController: UIViewController, UIPickerViewDelegate, UI
     
     // MARK: - Public
     
-    public func configure(with items: [PickerRepresentable], completion: @escaping DoneCompletion) {
+    public func configure(with items: [PickerRepresentable], selectedIndex: Int? = nil, completion: @escaping DoneCompletion) {
         self.onCompletion = completion
         self.items = items
         self.selectedIndex = items.count > 0 ? 1 : nil
         self.pickerView.reloadAllComponents()
+        
+        if let selectedIndex = selectedIndex, 0..<items.count ~= selectedIndex {
+            self.selectedIndex = selectedIndex
+            self.pickerView.selectRow(selectedIndex, inComponent: 0, animated: false)
+        }
     }
     
     // MARK: - Actions

Sources/Earthquake Network/Models/Networks/EQNSeismicNetwork.swift

@@ -22,6 +22,19 @@ class EQNSeismicNetwork: NSObject {
         self.country = country
         self.extended = extended
     }
+    
+    // MARK: - Equatable
+    
+    override func isEqual(_ object: Any?) -> Bool {
+        if let anObject = object as? EQNSeismicNetwork {
+            return anObject.acronym.lowercased() == acronym.lowercased()
+        }
+        return false
+    }
+    
+    override var hash: Int {
+        acronym.hash
+    }
 }