Use participants names for group title placeholder

Telegram/Telegram-iOS/en.lproj/Localizable.strings

@@ -9073,3 +9073,11 @@ Sorry for the inconvenience.";
 "DataUsage.Reset" = "Reset Statistics";
 
 "Conversation.SendWhenOnlineTooltip" = "Long tap to send the message later.";
+
+"Bot.Active" = "bot is active now";
+"Bot.Inactive" = "bot is not active";
+"Bot.Slow" = "bot replies slowly";
+"Bot.TapToUse" = "Tap here to use this bot";
+
+"CreateGroup.PeersTitleDelimeter" = ", ";
+"CreateGroup.PeersTitleLastDelimeter" = " and ";

submodules/ComposePollUI/Sources/CreatePollOptionItem.swift

@@ -507,6 +507,10 @@ class CreatePollOptionItemNode: ItemListRevealOptionsItemNode, ItemListItemNode,
         self.textNode.becomeFirstResponder()
     }
     
+    func selectAll() {
+        self.textNode.textView.selectAll(nil)
+    }
+    
     override func isReorderable(at point: CGPoint) -> Bool {
         if self.reorderControlNode.frame.contains(point), !self.reorderControlNode.isHidden, !self.isDisplayingRevealedOptions {
             return true

submodules/ComposePollUI/Sources/CreatePollTextInputItem.swift

@@ -617,6 +617,10 @@ public class CreatePollTextInputItemNode: ListViewItemNode, ASEditableTextNodeDe
         }
     }
     
+    public func selectAll() {
+        self.textNode.textView.selectAll(nil)
+    }
+    
     public func animateError() {
         self.textNode.layer.addShakeAnimation()
     }

submodules/ItemListAvatarAndNameInfoItem/Sources/ItemListAvatarAndNameItem.swift

@@ -1118,6 +1118,10 @@ public class ItemListAvatarAndNameInfoItemNode: ListViewItemNode, ItemListItemNo
         self.inputFirstField?.becomeFirstResponder()
     }
     
+    public func selectAll() {
+        self.inputFirstField?.selectAll(nil)
+    }
+    
     override public func longTapped() {
         self.item?.longTapAction?()
     }

submodules/ItemListUI/Sources/ItemListItem.swift

@@ -37,6 +37,7 @@ public protocol ItemListItemNode {
 
 public protocol ItemListItemFocusableNode {
     func focus()
+    func selectAll()
 }
 
 public enum ItemListInsetWithOtherSection {

submodules/ItemListUI/Sources/Items/ItemListMultilineInputItem.swift

@@ -472,6 +472,10 @@ public class ItemListMultilineInputItemNode: ListViewItemNode, ASEditableTextNod
         }
     }
     
+    public func selectAll() {
+        self.textNode.textView.selectAll(nil)
+    }
+    
     public func animateError() {
         self.textNode.layer.addShakeAnimation()
     }

submodules/ItemListUI/Sources/Items/ItemListSingleLineInputItem.swift

@@ -473,6 +473,10 @@ public class ItemListSingleLineInputItemNode: ListViewItemNode, UITextFieldDeleg
         }
     }
     
+    public func selectAll() {
+        self.textNode.textField.selectAll(nil)
+    }
+    
     @objc public func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
         if let item = self.item {
             let newText = ((textField.text ?? "") as NSString).replacingCharacters(in: range, with: string)

submodules/PeerInfoUI/Sources/UserInfoEditingPhoneItem.swift

@@ -347,4 +347,8 @@ class UserInfoEditingPhoneItemNode: ItemListRevealOptionsItemNode, ItemListItemN
     func focus() {
         self.phoneNode.numberField?.becomeFirstResponder()
     }
+    
+    func selectAll() {
+        self.phoneNode.numberField?.textField.selectAll(nil)
+    }
 }

submodules/TelegramUI/Sources/CreateGroupController.swift

@@ -553,6 +553,7 @@ public func createGroupControllerImpl(context: AccountContext, peerIds: [PeerId]
     var endEditingImpl: (() -> Void)?
     var ensureItemVisibleImpl: ((CreateGroupEntryTag, Bool) -> Void)?
     var findAutoremoveReferenceNode: (() -> ItemListDisclosureItemNode?)?
+    var selectTitleImpl: (() -> Void)?
     
     let actionsDisposable = DisposableSet()
     
@@ -564,6 +565,50 @@ public func createGroupControllerImpl(context: AccountContext, peerIds: [PeerId]
     let uploadedAvatar = Promise<UploadedPeerPhotoData>()
     var uploadedVideoAvatar: (Promise<UploadedPeerPhotoData?>, Double?)? = nil
     
+    if initialTitle == nil && peerIds.count > 0 && peerIds.count < 5 {
+        let _ = (context.engine.data.get(
+            TelegramEngine.EngineData.Item.Peer.Peer(id: context.account.peerId),
+            EngineDataList(
+                peerIds.map(TelegramEngine.EngineData.Item.Peer.Peer.init)
+            )
+        )
+        |> deliverOnMainQueue).start(next: { accountPeer, peers in
+            var allNames: [String] = []
+            if case let .user(user) = accountPeer, let firstName = user.firstName, !firstName.isEmpty {
+                allNames.append(firstName)
+            }
+            for peer in peers {
+                if case let .user(user) = peer, let firstName = user.firstName, !firstName.isEmpty {
+                    allNames.append(firstName)
+                }
+            }
+            
+            if allNames.count > 1 {
+                let presentationData = context.sharedContext.currentPresentationData.with { $0 }
+                var title: String = ""
+                for i in 0 ..< allNames.count {
+                    if i == 0 {
+                    } else if i < allNames.count - 1 {
+                        title.append(presentationData.strings.CreateGroup_PeersTitleDelimeter)
+                    } else {
+                        title.append(presentationData.strings.CreateGroup_PeersTitleLastDelimeter)
+                    }
+                    title.append(allNames[i])
+                }
+                
+                updateState { current in
+                    var current = current
+                    current.editingName = .title(title: title, type: .group)
+                    return current
+                }
+                
+                Queue.mainQueue().after(0.3) {
+                    selectTitleImpl?()
+                }
+            }
+        })
+    }
+    
     let addressPromise = Promise<String?>(nil)
     let venuesPromise = Promise<[TelegramMediaMap]?>(nil)
     if case let .locatedGroup(latitude, longitude, address) = mode {
@@ -1341,6 +1386,14 @@ public func createGroupControllerImpl(context: AccountContext, peerIds: [PeerId]
         }
     }
     
+    selectTitleImpl = { [weak controller] in
+        controller?.forEachItemNode({ itemNode in
+            if let itemNode = itemNode as? ItemListAvatarAndNameInfoItemNode {
+                itemNode.selectAll()
+            }
+        })
+    }
+    
     return controller
 }