Add list deletion

Tusker/Screens/Explore/ExploreViewController.swift

@@ -12,7 +12,7 @@ import Pachyderm
 
 class ExploreViewController: EnhancedTableViewController {
 
-    var dataSource: UITableViewDiffableDataSource<Section, Item>!
+    var dataSource: DataSource!
     
     var resultsController: SearchResultsViewController!
     var searchController: UISearchController!
@@ -57,6 +57,7 @@ class ExploreViewController: EnhancedTableViewController {
             
             return cell
         })
+        dataSource.exploreController = self
         
         var snapshot = NSDiffableDataSourceSnapshot<Section, Item>()
         snapshot.appendSections([.bookmarks, .lists])
@@ -137,6 +138,10 @@ class ExploreViewController: EnhancedTableViewController {
         }
     }
 
+    override func tableView(_ tableView: UITableView, editingStyleForRowAt indexPath: IndexPath) -> UITableViewCell.EditingStyle {
+        return .delete
+    }
+    
 }
 
 extension ExploreViewController {
@@ -173,7 +178,11 @@ extension ExploreViewController {
             }
         }
     }
+    
     class DataSource: UITableViewDiffableDataSource<Section, Item> {
+        
+        weak var exploreController: ExploreViewController?
+        
         override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
             switch section {
             case 1:
@@ -182,5 +191,40 @@ extension ExploreViewController {
                 return nil
             }
         }
+        
+        override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
+            if case .list(_) = itemIdentifier(for: indexPath) {
+                return true
+            }
+            return false
+        }
+
+        override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
+            guard editingStyle == .delete,
+                case let .list(list) = itemIdentifier(for: indexPath) else {
+                    return
+            }
+            
+            let title = String(format: NSLocalizedString("Are you sure want to delete the '%@' list?", comment: "delete list alert title"), list.title)
+            let alert = UIAlertController(title: title, message: nil, preferredStyle: .alert)
+            alert.addAction(UIAlertAction(title: NSLocalizedString("Cancel", comment: "delete list alert cancel button"), style: .cancel, handler: nil))
+            alert.addAction(UIAlertAction(title: NSLocalizedString("Delete List", comment: "delete list alert confirm button"), style: .destructive, handler: { (_) in
+                
+                let request = List.delete(list)
+                MastodonController.client.run(request) { (response) in
+                    guard case .success(_, _) = response else {
+                        fatalError()
+                    }
+                    
+                    var snapshot = self.snapshot()
+                    snapshot.deleteItems([.list(list)])
+                    DispatchQueue.main.async {
+                        self.apply(snapshot)
+                    }
+                }
+            }))
+            self.exploreController?.present(alert, animated: true)
+        }
+        
     }
 }