feat: Add loading when retrieving available purchases

Sources/Earthquake Network/Controllers/InApp/SubscriptionsHeaderTableViewCell.swift

@@ -10,10 +10,37 @@ import UIKit
 
 class SubscriptionsHeaderTableViewCell: EQNBaseTableViewCell {
 
-    @IBOutlet weak var headerTitleLabel: UILabel!
+    var isLoading = false {
+        didSet {
+            updateUI()
+        }
+    }
+    
+    var title: String? = nil {
+        didSet {
+            updateUI()
+        }
+    }
+    
+    @IBOutlet private weak var headerTitleLabel: UILabel!
+    @IBOutlet private weak var loadingActivityIndicator: UIActivityIndicatorView!
+    
+    // MARK: - View Lifecycle
     
     override func awakeFromNib() {
         super.awakeFromNib()
         // Initialization code
     }
+    
+    // MARK: - Private
+    
+    private func updateUI() {
+        headerTitleLabel.text = title
+        
+        if isLoading && title != nil {
+            loadingActivityIndicator.startAnimating()
+        } else {
+            loadingActivityIndicator.stopAnimating()
+        }
+    }
 }

Sources/Earthquake Network/Controllers/InApp/SubscriptionsViewController.swift

@@ -38,6 +38,8 @@ class SubscriptionsViewController: UITableViewController {
     private var subscribedProduct: SKProduct?
     /// Availability for subscriptions
     private var availability: EQNPurchaseAvailability?
+    /// Tells if products are loading
+    private var isLoading = false
     
     // MARK: - View Lifecycle
     
@@ -117,7 +119,11 @@ class SubscriptionsViewController: UITableViewController {
     }
     
     private func loadData() {
+        isLoading = true
+        
         VersioneProProducts.store.requestProducts{ [weak self] success, products in
+            self?.isLoading = false
+
             guard let self = self, let products = products, success == true else { return }
             
             // todo: teniamo il più "alto"
@@ -172,7 +178,8 @@ class SubscriptionsViewController: UITableViewController {
     override func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
         let tableSection = sections[section]
         if let cell = tableView.dequeueReusableCell(withIdentifier: "SectionHeaderCell") as? SubscriptionsHeaderTableViewCell {
-            cell.headerTitleLabel.text = tableSection.sectionTitle
+            cell.title = tableSection.sectionTitle
+            cell.isLoading = isLoading
             return cell
         }
         return nil