fix(ChatUI): scroll to start of day on chat date indicator click before opening calendar (#118)

Author: CHUKEPC

packages/ChatUI/Sources/ChatUI/ChatController.swift

@@ -4574,7 +4574,9 @@ open class ChatController<Context: AccountContextProtocol>: TelegramGenericViewC
                         guard let strongSelf, strongSelf.messageFocusRequestId == requestId,
                               strongSelf.chatLocation == chatLocation, strongSelf.locationValue?.tag == locationTag else { return }
                         if let messageId = messageId {
-                            strongSelf.chatInteraction.focusMessageId(nil, .init(messageId: messageId, string: nil), .top(id: 0, innerId: nil, animated: true, focus: .init(focus: false), inset: 30))
+                            let topInset = strongSelf.genericView.tableView.contentInsets.top
+                            let inset: CGFloat = topInset + 30 + 10
+                            strongSelf.chatInteraction.focusMessageId(nil, .init(messageId: messageId, string: nil), .top(id: 0, innerId: nil, animated: true, focus: .init(focus: false), inset: inset))
                         }
                     }))
                 case .scheduled:
@@ -4594,7 +4596,9 @@ open class ChatController<Context: AccountContextProtocol>: TelegramGenericViewC
                         return true
                     })
                     if let targetItem {
-                        strongSelf.genericView.tableView.scroll(to: .top(id: targetItem.stableId, innerId: nil, animated: true, focus: .init(focus: false), inset: 30))
+                        let topInset = strongSelf.genericView.tableView.contentInsets.top
+                        let inset: CGFloat = topInset + 30 + 10
+                        strongSelf.genericView.tableView.scroll(to: .top(id: targetItem.stableId, innerId: nil, animated: true, focus: .init(focus: false), inset: inset))
                     }
                 case .pinned:
                     break

packages/ChatUI/Sources/ChatUI/ChatMessageDateHeader.swift

@@ -241,6 +241,31 @@ public class ChatDateStickView : TableStickView {
 
         containerView.set(handler: { [weak self] _ in
             guard let self, let item = self.item as? ChatDateStickItem, let interaction = item.chatInteraction else { return }
+            var ignore: Bool = false
+            let table = item.table ?? (self.superview as? TableView)
+            if let table {
+                let row = table.visibleRows()
+                if row.length > 0 {
+                    let minRow = max(0, row.location)
+                    let maxRow = min(table.count - 1, row.location + row.length - 1)
+                    for i in minRow ... maxRow {
+                        if let underItem = table.item(at: i) as? ChatDateStickItem, underItem.timestamp == item.timestamp {
+                            ignore = true
+                            break
+                        }
+                    }
+                }
+            }
+            if self.header && !ignore {
+                self.cancelCount()
+                if let location = item.messageCountLocation, case let .peer(_, _, _, _, _, minDate?, _) = location {
+                    interaction.jumpToDate(Date(timeIntervalSince1970: TimeInterval(minDate)))
+                } else {
+                    let timeDifference = interaction.mode == .scheduled ? 0 : interaction.interactionContext.timeDifference
+                    interaction.jumpToDate(Date(timeIntervalSince1970: TimeInterval(item.timestamp) + timeDifference))
+                }
+                return
+            }
             let canOpenCalendar: Bool
             switch interaction.mode {
             case .history, .thread: