Agrega funcionalidad de busqueda de contactos

ContactsApp/ContactsViewController.swift

@@ -27,7 +27,6 @@ class ContactsViewController: UIViewController {
     }
     }
     
     
     func importContacts() {
     func importContacts() {
-        
         let keys = [CNContactFormatter.descriptorForRequiredKeys(for: .fullName), CNContactEmailAddressesKey, CNContactPhoneNumbersKey, CNContactImageDataKey] as [Any]
         let keys = [CNContactFormatter.descriptorForRequiredKeys(for: .fullName), CNContactEmailAddressesKey, CNContactPhoneNumbersKey, CNContactImageDataKey] as [Any]
         let request = CNContactFetchRequest( keysToFetch: keys as! [CNKeyDescriptor])
         let request = CNContactFetchRequest( keysToFetch: keys as! [CNKeyDescriptor])
         request.sortOrder = CNContactSortOrder.givenName
         request.sortOrder = CNContactSortOrder.givenName
@@ -152,7 +151,26 @@ extension ContactsViewController: UISearchBarDelegate, UISearchDisplayDelegate,
         
         
     }
     }
     
     
+    func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
+        importContacts()
+    }
+    
     func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
     func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
-        print(searchText)
+        var foundContacts = [ContactStruct]()
+        
+        if searchText == "" {
+            importContacts()
+            contactsTable.reloadData()
+        } else {
+            for indexContact in contactStructArray.indices{
+                let contactFound = contactStructArray[indexContact].contacts.filter({$0.givenName.lowercased().contains(searchText.lowercased())})
+                
+                if !contactFound.isEmpty {
+                    foundContacts.append(ContactStruct(isExpanded: true, contacts: contactFound, letter: contactStructArray[indexContact].letter))
+                }
+            }
+            contactStructArray = foundContacts
+            contactsTable.reloadData()
+        }
     }
     }
 }
 }