[Framework] Show top words for filtered items in the Feed List (#12)

This PR contains the work done to show the top 3 words belonging to the filtered reviews  in the `FeedListViewController` view controller.

Reviewed-on: rock-n-code/app-reviews#12
Co-authored-by: Javier Cicchelli <javier@rock-n-code.com>
Co-committed-by: Javier Cicchelli <javier@rock-n-code.com>

Frameworks/Feed/Bundle/Sources/UI/View Controllers/FeedListViewController.swift

@@ -40,11 +40,12 @@ public class FeedListViewController: UITableViewController {
                 image: UIImage.Icon.star,
                 children: {
                     FilterOption.allCases.map { option -> UIAction in
-                            .init(title: option.text,
-                                  image: .init(systemName: option.icon)
-                            ) { [weak self] _ in
-                                self?.viewModel.filter(by: option)
-                            }
+                        .init(
+                            title: option.text,
+                            image: .init(systemName: option.icon)
+                        ) { [weak self] _ in
+                            self?.viewModel.filter(by: option)
+                        }
                     }
                 }()
             )
@@ -83,30 +84,18 @@ public class FeedListViewController: UITableViewController {
         _ tableView: UITableView,
         numberOfRowsInSection section: Int
     ) -> Int {
-        viewModel.items.count
+        viewModel.itemsCount
     }
     
     public override func tableView(
         _ tableView: UITableView,
         cellForRowAt indexPath: IndexPath
     ) -> UITableViewCell {
-        guard let cell = tableView.dequeueReusableCell(withIdentifier: .Cell.feedItem) else {
-            return .init()
+        if viewModel.isWordsShowing && indexPath.row == 0 {
+            makeTopWordsCell(tableView)
+        } else {
+            makeFeedItemCell(tableView, at: indexPath.row)
         }
-
-        cell.contentConfiguration = {
-            if #available(iOS 16.0, *) {
-                UIHostingConfiguration {
-                    FeedItemCell(items[indexPath.row])
-                }
-            } else {
-                HostingConfiguration {
-                    FeedItemCell(items[indexPath.row])
-                }
-            }
-        }()
-
-        return cell
     }
     
     // MARK: UITableViewDelegate
@@ -158,8 +147,57 @@ private extension FeedListViewController {
             .store(in: &cancellables)
     }
     
+    func makeFeedItemCell(
+        _ tableView: UITableView,
+        at row: Int
+    ) -> UITableViewCell {
+        guard
+            let cell = FeedItemCell.dequeue(from: tableView),
+            let item = viewModel.item(for: row)
+        else {
+            return .init()
+        }
+        
+        cell.separatorInset = .init(width: tableView.bounds.size.width)
+        cell.contentConfiguration = {
+            if #available(iOS 16.0, *) {
+                UIHostingConfiguration {
+                    FeedItemView(item)
+                }
+            } else {
+                HostingConfiguration {
+                    FeedItemView(item)
+                }
+            }
+        }()
+        
+        return cell
+    }
+    
+    func makeTopWordsCell(_ tableView: UITableView) -> UITableViewCell {
+        guard let cell = TopWordsCell.dequeue(from: tableView) else {
+            return .init()
+        }
+        
+        cell.separatorInset = .init(width: tableView.bounds.size.width)
+        cell.contentConfiguration = {
+            if #available(iOS 16.0, *) {
+                UIHostingConfiguration {
+                    TopWordsView(viewModel.words)
+                }
+            } else {
+                HostingConfiguration {
+                    TopWordsView(viewModel.words)
+                }
+            }
+        }()
+
+        return cell
+    }
+    
     func registerTableCells() {
-        tableView.register(UITableViewCell.self, forCellReuseIdentifier: .Cell.feedItem)
+        FeedItemCell.register(in: tableView)
+        TopWordsCell.register(in: tableView)
     }
     
     func setNavigationBar() {
@@ -232,6 +270,21 @@ private extension String {
     }
 }
 
+// MARK: - UIEdgeInsets+Inits
+private extension UIEdgeInsets {
+    
+    // MARK: Initialisers
+    init(width: CGFloat) {
+        self = .init(
+            top: 0,
+            left: width,
+            bottom: 0,
+            right: 0
+        )
+    }
+    
+}
+
 // MARK: - Previews
 #if DEBUG
 import ReviewsiTunesKit