Add swipe actions to conversation selection rows

Implemented trailing swipe actions for duplicating and deleting conversations, and leading swipe actions for favoriting/unfavoriting conversations in ConversationSelectionView. These actions improve user interaction and management of conversations within the selection view.

Author: Lakr233

FlowDown/Interface/Components/ConversationSelectionView/ConversationSelectionView+Delegate.swift

@@ -15,6 +15,72 @@ extension ConversationSelectionView: UITableViewDelegate {
         ChatSelection.shared.select(identifier, options: [.collapseSidebar])
     }
 
+    func tableView(_ tableView: UITableView, trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
+        guard let identifier = dataSource.itemIdentifier(for: indexPath) else { return nil }
+
+        let duplicateAction = UIContextualAction(style: .normal, title: nil) { _, _, completion in
+            if let duplicatedId = ConversationManager.shared.duplicateConversation(identifier: identifier) {
+                ChatSelection.shared.select(duplicatedId, options: [.collapseSidebar])
+            }
+            completion(true)
+        }
+        duplicateAction.image = UIImage(systemName: "doc.on.doc")
+
+        let deleteAction = UIContextualAction(style: .destructive, title: nil) { [weak self] _, _, completion in
+            guard let self else {
+                completion(false)
+                return
+            }
+
+            let snapshot = dataSource.snapshot()
+            let identifiers = snapshot.itemIdentifiers
+            let currentSelectionIndex = identifiers.firstIndex(of: identifier)
+            let isDeletingSelectedRow = tableView.indexPathForSelectedRow == indexPath
+
+            ConversationManager.shared.deleteConversation(identifier: identifier)
+
+            DispatchQueue.main.async {
+                if isDeletingSelectedRow,
+                   let currentSelectionIndex,
+                   let nextIdentifier = (
+                       identifiers.dropFirst(currentSelectionIndex + 1).first
+                           ?? identifiers.prefix(currentSelectionIndex).last
+                   )
+                {
+                    ChatSelection.shared.select(nextIdentifier)
+                }
+                completion(true)
+            }
+        }
+        deleteAction.image = UIImage(systemName: "trash")
+
+        let configuration = UISwipeActionsConfiguration(actions: [deleteAction, duplicateAction])
+        configuration.performsFirstActionWithFullSwipe = true
+        return configuration
+    }
+
+    func tableView(_: UITableView, leadingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
+        guard let identifier = dataSource.itemIdentifier(for: indexPath),
+              let conversation = ConversationManager.shared.conversation(identifier: identifier)
+        else { return nil }
+
+        let isFavorite = conversation.isFavorite
+        let imageName = isFavorite ? "star.slash" : "star"
+
+        let favoriteAction = UIContextualAction(style: .normal, title: nil) { _, _, completion in
+            ConversationManager.shared.editConversation(identifier: identifier) { conv in
+                conv.update(\.isFavorite, to: !isFavorite)
+            }
+            completion(true)
+        }
+        favoriteAction.image = UIImage(systemName: imageName)
+        favoriteAction.backgroundColor = .systemYellow
+
+        let configuration = UISwipeActionsConfiguration(actions: [favoriteAction])
+        configuration.performsFirstActionWithFullSwipe = true
+        return configuration
+    }
+
     func tableView(_: UITableView, viewForHeaderInSection section: Int) -> UIView? {
         guard dataSource.snapshot().numberOfSections > 1 else { return nil }
         let sectionIdentifier = dataSource.snapshot().sectionIdentifiers[section]

FlowDown/Interface/ViewController/MainController/MainController.swift

@@ -316,6 +316,15 @@ class MainController: UIViewController {
         }
         Logger.app.debugFile("current conversation ID: \(currentConversationID)")
 
+        guard sdb.conversationWith(identifier: currentConversationID) != nil else {
+            Logger.app.errorFile("conversation missing from database: id \(currentConversationID)")
+            showErrorAlert(
+                title: "Conversation Missing",
+                message: "The selected conversation could not be found. Please choose another conversation or create a new one."
+            )
+            return
+        }
+
         // retrieve session
         let session = ConversationSessionManager.shared.session(for: currentConversationID)
         Logger.app.debugFile("session created/retrieved for conversation")
@@ -325,10 +334,7 @@ class MainController: UIViewController {
             Logger.app.errorFile("no default model configured")
             showErrorAlert(
                 title: "No Model Available",
-                message: String(
-                    localized:
-                    "Please add some models to use. You can choose to download models, or use cloud model from well known service providers."
-                )
+                message: "Please add some models to use. You can choose to download models, or use cloud model from well known service providers."
             ) {
                 let setting = SettingController()
                 SettingController.setNextEntryPage(.modelManagement)
@@ -363,11 +369,15 @@ class MainController: UIViewController {
         }
     }
 
-    private func showErrorAlert(title: String, message: String, completion: @escaping () -> Void = {}) {
+    private func showErrorAlert(
+        title: String.LocalizationValue,
+        message: String.LocalizationValue,
+        completion: @escaping () -> Void = {}
+    ) {
         DispatchQueue.main.async {
             let alert = AlertViewController(
-                title: "\(title)",
-                message: "\(message)"
+                title: title,
+                message: message
             ) { context in
                 context.addAction(title: "OK") {
                     context.dispose(completion)

FlowDown/Resources/Localizable.xcstrings

@@ -2796,6 +2796,22 @@
         }
       }
     },
+    "Conversation Missing" : {
+      "localizations" : {
+        "en" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Conversation Missing"
+          }
+        },
+        "zh-Hans" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "对话丢失"
+          }
+        }
+      }
+    },
     "Conversation: %@" : {
       "localizations" : {
         "en" : {
@@ -12864,6 +12880,22 @@
         }
       }
     },
+    "The selected conversation could not be found. Please choose another conversation or create a new one." : {
+      "localizations" : {
+        "en" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "The selected conversation could not be found. Please choose another conversation or create a new one."
+          }
+        },
+        "zh-Hans" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "未能找到选中的对话，请选择其他对话或创建新对话。"
+          }
+        }
+      }
+    },
     "The selected model does not support image inputs." : {
       "localizations" : {
         "en" : {