Render Room and Message Pills (#3809)

* added a way to render the room and the message

pills, but is WIP

* permalinks now get converted into pills!

* fixed an issue where room address mentions

were not adding a URL properly but a string

* updated tests

* c

* Revert "c"

This reverts commit 5c80252fa23dba7e4d44f2a07fbf1e9500e37c82.

* updated tests

* more tests

* created APIs to get a specific RoomSummary

given the id or the alias

* small mention builder improvement

* pr suggestions

ElementX/Sources/FlowCoordinators/MediaEventsTimelineFlowCoordinator.swift

@@ -93,7 +93,8 @@ class MediaEventsTimelineFlowCoordinator: FlowCoordinatorProtocol {
                                                                         appMediator: appMediator,
                                                                         emojiProvider: emojiProvider,
                                                                         userIndicatorController: userIndicatorController,
-                                                                        timelineControllerFactory: timelineControllerFactory)
+                                                                        timelineControllerFactory: timelineControllerFactory,
+                                                                        clientProxy: userSession.clientProxy)
         
         let coordinator = MediaEventsTimelineScreenCoordinator(parameters: parameters)
         

ElementX/Sources/FlowCoordinators/PinnedEventsTimelineFlowCoordinator.swift

@@ -78,7 +78,8 @@ class PinnedEventsTimelineFlowCoordinator: FlowCoordinatorProtocol {
                                                                                   voiceMessageMediaManager: userSession.voiceMessageMediaManager,
                                                                                   appMediator: appMediator,
                                                                                   emojiProvider: emojiProvider,
-                                                                                  timelineControllerFactory: timelineControllerFactory))
+                                                                                  timelineControllerFactory: timelineControllerFactory,
+                                                                                  clientProxy: userSession.clientProxy))
         
         coordinator.actions
             .sink { [weak self] action in

ElementX/Sources/Mocks/Generated/GeneratedMocks.swift

@@ -3225,6 +3225,146 @@ class ClientProxyMock: ClientProxyProtocol, @unchecked Sendable {
             return roomPreviewForIdentifierViaReturnValue
         }
     }
+    //MARK: - roomSummaryForIdentifier
+
+    var roomSummaryForIdentifierUnderlyingCallsCount = 0
+    var roomSummaryForIdentifierCallsCount: Int {
+        get {
+            if Thread.isMainThread {
+                return roomSummaryForIdentifierUnderlyingCallsCount
+            } else {
+                var returnValue: Int? = nil
+                DispatchQueue.main.sync {
+                    returnValue = roomSummaryForIdentifierUnderlyingCallsCount
+                }
+
+                return returnValue!
+            }
+        }
+        set {
+            if Thread.isMainThread {
+                roomSummaryForIdentifierUnderlyingCallsCount = newValue
+            } else {
+                DispatchQueue.main.sync {
+                    roomSummaryForIdentifierUnderlyingCallsCount = newValue
+                }
+            }
+        }
+    }
+    var roomSummaryForIdentifierCalled: Bool {
+        return roomSummaryForIdentifierCallsCount > 0
+    }
+    var roomSummaryForIdentifierReceivedIdentifier: String?
+    var roomSummaryForIdentifierReceivedInvocations: [String] = []
+
+    var roomSummaryForIdentifierUnderlyingReturnValue: RoomSummary?
+    var roomSummaryForIdentifierReturnValue: RoomSummary? {
+        get {
+            if Thread.isMainThread {
+                return roomSummaryForIdentifierUnderlyingReturnValue
+            } else {
+                var returnValue: RoomSummary?? = nil
+                DispatchQueue.main.sync {
+                    returnValue = roomSummaryForIdentifierUnderlyingReturnValue
+                }
+
+                return returnValue!
+            }
+        }
+        set {
+            if Thread.isMainThread {
+                roomSummaryForIdentifierUnderlyingReturnValue = newValue
+            } else {
+                DispatchQueue.main.sync {
+                    roomSummaryForIdentifierUnderlyingReturnValue = newValue
+                }
+            }
+        }
+    }
+    var roomSummaryForIdentifierClosure: ((String) -> RoomSummary?)?
+
+    func roomSummaryForIdentifier(_ identifier: String) -> RoomSummary? {
+        roomSummaryForIdentifierCallsCount += 1
+        roomSummaryForIdentifierReceivedIdentifier = identifier
+        DispatchQueue.main.async {
+            self.roomSummaryForIdentifierReceivedInvocations.append(identifier)
+        }
+        if let roomSummaryForIdentifierClosure = roomSummaryForIdentifierClosure {
+            return roomSummaryForIdentifierClosure(identifier)
+        } else {
+            return roomSummaryForIdentifierReturnValue
+        }
+    }
+    //MARK: - roomSummaryForAlias
+
+    var roomSummaryForAliasUnderlyingCallsCount = 0
+    var roomSummaryForAliasCallsCount: Int {
+        get {
+            if Thread.isMainThread {
+                return roomSummaryForAliasUnderlyingCallsCount
+            } else {
+                var returnValue: Int? = nil
+                DispatchQueue.main.sync {
+                    returnValue = roomSummaryForAliasUnderlyingCallsCount
+                }
+
+                return returnValue!
+            }
+        }
+        set {
+            if Thread.isMainThread {
+                roomSummaryForAliasUnderlyingCallsCount = newValue
+            } else {
+                DispatchQueue.main.sync {
+                    roomSummaryForAliasUnderlyingCallsCount = newValue
+                }
+            }
+        }
+    }
+    var roomSummaryForAliasCalled: Bool {
+        return roomSummaryForAliasCallsCount > 0
+    }
+    var roomSummaryForAliasReceivedAlias: String?
+    var roomSummaryForAliasReceivedInvocations: [String] = []
+
+    var roomSummaryForAliasUnderlyingReturnValue: RoomSummary?
+    var roomSummaryForAliasReturnValue: RoomSummary? {
+        get {
+            if Thread.isMainThread {
+                return roomSummaryForAliasUnderlyingReturnValue
+            } else {
+                var returnValue: RoomSummary?? = nil
+                DispatchQueue.main.sync {
+                    returnValue = roomSummaryForAliasUnderlyingReturnValue
+                }
+
+                return returnValue!
+            }
+        }
+        set {
+            if Thread.isMainThread {
+                roomSummaryForAliasUnderlyingReturnValue = newValue
+            } else {
+                DispatchQueue.main.sync {
+                    roomSummaryForAliasUnderlyingReturnValue = newValue
+                }
+            }
+        }
+    }
+    var roomSummaryForAliasClosure: ((String) -> RoomSummary?)?
+
+    func roomSummaryForAlias(_ alias: String) -> RoomSummary? {
+        roomSummaryForAliasCallsCount += 1
+        roomSummaryForAliasReceivedAlias = alias
+        DispatchQueue.main.async {
+            self.roomSummaryForAliasReceivedInvocations.append(alias)
+        }
+        if let roomSummaryForAliasClosure = roomSummaryForAliasClosure {
+            return roomSummaryForAliasClosure(alias)
+        } else {
+            return roomSummaryForAliasReturnValue
+        }
+    }
     //MARK: - loadUserDisplayName
 
     var loadUserDisplayNameUnderlyingCallsCount = 0

ElementX/Sources/Mocks/RoomSummaryProviderMock.swift

@@ -67,6 +67,31 @@ extension RoomSummaryProviderMock {
     }
 }
 
+extension RoomSummary {
+    static func mock(id: String,
+                     name: String,
+                     canonicalAlias: String? = nil) -> RoomSummary {
+        RoomSummary(roomListItem: RoomListItemSDKMock(),
+                    id: id,
+                    joinRequestType: nil,
+                    name: name,
+                    isDirect: false,
+                    avatarURL: nil,
+                    heroes: [],
+                    lastMessage: AttributedString("I do not wish to take the trouble to understand mysticism"),
+                    lastMessageFormattedTimestamp: "14:56",
+                    unreadMessagesCount: 0,
+                    unreadMentionsCount: 0,
+                    unreadNotificationsCount: 0,
+                    notificationMode: .allMessages,
+                    canonicalAlias: canonicalAlias,
+                    alternativeAliases: [],
+                    hasOngoingCall: false,
+                    isMarkedUnread: false,
+                    isFavourite: false)
+    }
+}
+
 extension Array where Element == RoomSummary {
     static let mockRooms: [Element] = [
         RoomSummary(roomListItem: RoomListItemSDKMock(),
@@ -83,6 +108,7 @@ extension Array where Element == RoomSummary {
                     unreadNotificationsCount: 0,
                     notificationMode: .allMessages,
                     canonicalAlias: nil,
+                    alternativeAliases: [],
                     hasOngoingCall: false,
                     isMarkedUnread: false,
                     isFavourite: false),
@@ -99,7 +125,8 @@ extension Array where Element == RoomSummary {
                     unreadMentionsCount: 0,
                     unreadNotificationsCount: 2,
                     notificationMode: .mute,
-                    canonicalAlias: nil,
+                    canonicalAlias: "#foundation-and-empire:matrix.org",
+                    alternativeAliases: [],
                     hasOngoingCall: false,
                     isMarkedUnread: false,
                     isFavourite: false),
@@ -117,6 +144,7 @@ extension Array where Element == RoomSummary {
                     unreadNotificationsCount: 0,
                     notificationMode: .mentionsAndKeywordsOnly,
                     canonicalAlias: nil,
+                    alternativeAliases: [],
                     hasOngoingCall: false,
                     isMarkedUnread: false,
                     isFavourite: false),
@@ -134,6 +162,7 @@ extension Array where Element == RoomSummary {
                     unreadNotificationsCount: 2,
                     notificationMode: .allMessages,
                     canonicalAlias: nil,
+                    alternativeAliases: [],
                     hasOngoingCall: false,
                     isMarkedUnread: false,
                     isFavourite: false),
@@ -151,6 +180,7 @@ extension Array where Element == RoomSummary {
                     unreadNotificationsCount: 1,
                     notificationMode: .allMessages,
                     canonicalAlias: nil,
+                    alternativeAliases: [],
                     hasOngoingCall: true,
                     isMarkedUnread: false,
                     isFavourite: false),
@@ -168,6 +198,7 @@ extension Array where Element == RoomSummary {
                     unreadNotificationsCount: 0,
                     notificationMode: .mute,
                     canonicalAlias: nil,
+                    alternativeAliases: [],
                     hasOngoingCall: true,
                     isMarkedUnread: false,
                     isFavourite: false),
@@ -185,6 +216,7 @@ extension Array where Element == RoomSummary {
                     unreadNotificationsCount: 0,
                     notificationMode: nil,
                     canonicalAlias: nil,
+                    alternativeAliases: [],
                     hasOngoingCall: false,
                     isMarkedUnread: false,
                     isFavourite: false)
@@ -235,6 +267,7 @@ extension Array where Element == RoomSummary {
                     unreadNotificationsCount: 0,
                     notificationMode: nil,
                     canonicalAlias: "#footest:somewhere.org",
+                    alternativeAliases: [],
                     hasOngoingCall: false,
                     isMarkedUnread: false,
                     isFavourite: false),
@@ -252,6 +285,7 @@ extension Array where Element == RoomSummary {
                     unreadNotificationsCount: 0,
                     notificationMode: nil,
                     canonicalAlias: nil,
+                    alternativeAliases: [],
                     hasOngoingCall: false,
                     isMarkedUnread: false,
                     isFavourite: false)

ElementX/Sources/Other/HTMLParsing/AttributedStringBuilder.swift

@@ -224,7 +224,8 @@ struct AttributedStringBuilder: AttributedStringBuilderProtocol {
             case .atRoom:
                 attributedString.addAttribute(.MatrixAllUsersMention, value: true, range: match.range)
             case .roomAlias(let alias):
-                if let url = try? matrixToRoomAliasPermalink(roomAlias: alias) {
+                if let urlString = try? matrixToRoomAliasPermalink(roomAlias: alias),
+                   let url = URL(string: urlString) {
                     attributedString.addAttribute(.link, value: url, range: match.range)
                 }
             case .matrixURI(let uri):
@@ -282,13 +283,13 @@ struct AttributedStringBuilder: AttributedStringBuilderProtocol {
                     case .user(let userID):
                         mentionBuilder.handleUserMention(for: attributedString, in: range, url: url, userID: userID, userDisplayName: nil)
                     case .room(let roomID):
-                        attributedString.addAttributes([.MatrixRoomID: roomID], range: range)
+                        mentionBuilder.handleRoomIDMention(for: attributedString, in: range, url: url, roomID: roomID)
                     case .roomAlias(let alias):
-                        attributedString.addAttributes([.MatrixRoomAlias: alias], range: range)
+                        mentionBuilder.handleRoomAliasMention(for: attributedString, in: range, url: url, roomAlias: alias)
                     case .eventOnRoomId(let roomID, let eventID):
-                        attributedString.addAttributes([.MatrixEventOnRoomID: EventOnRoomIDAttribute.Value(roomID: roomID, eventID: eventID)], range: range)
+                        mentionBuilder.handleEventOnRoomIDMention(for: attributedString, in: range, url: url, eventID: eventID, roomID: roomID)
                     case .eventOnRoomAlias(let alias, let eventID):
-                        attributedString.addAttributes([.MatrixEventOnRoomAlias: EventOnRoomAliasAttribute.Value(alias: alias, eventID: eventID)], range: range)
+                        mentionBuilder.handleEventOnRoomAliasMention(for: attributedString, in: range, url: url, eventID: eventID, roomAlias: alias)
                     }
                 }
             }
@@ -364,6 +365,10 @@ extension NSAttributedString.Key {
 
 protocol MentionBuilderProtocol {
     func handleUserMention(for attributedString: NSMutableAttributedString, in range: NSRange, url: URL, userID: String, userDisplayName: String?)
+    func handleRoomIDMention(for attributedString: NSMutableAttributedString, in range: NSRange, url: URL, roomID: String)
+    func handleRoomAliasMention(for attributedString: NSMutableAttributedString, in range: NSRange, url: URL, roomAlias: String)
+    func handleEventOnRoomAliasMention(for attributedString: NSMutableAttributedString, in range: NSRange, url: URL, eventID: String, roomAlias: String)
+    func handleEventOnRoomIDMention(for attributedString: NSMutableAttributedString, in range: NSRange, url: URL, eventID: String, roomID: String)
     func handleAllUsersMention(for attributedString: NSMutableAttributedString, in range: NSRange)
 }
 

ElementX/Sources/Other/Pills/MentionBuilder.swift

@@ -9,13 +9,20 @@ import Foundation
 import UIKit
 
 struct MentionBuilder: MentionBuilderProtocol {
-    func handleUserMention(for attributedString: NSMutableAttributedString, in range: NSRange, url: URL, userID: String, userDisplayName: String?) {
+    struct AttributesToRestore {
-        let attributes = attributedString.attributes(at: 0, longestEffectiveRange: nil, in: range)
+        let font: UIFont
-        let font = attributes[.font] as? UIFont ?? .preferredFont(forTextStyle: .body)
+        let blockquote: Bool?
-        let blockquote = attributes[.MatrixBlockquote]
+        let foregroundColor: UIColor
-        let foregroundColor = attributes[.foregroundColor] as? UIColor ?? .compound.textPrimary
+    }
+    
+    func handleUserMention(for attributedString: NSMutableAttributedString,
+                           in range: NSRange,
+                           url: URL,
+                           userID: String,
+                           userDisplayName: String?) {
+        let attributesToRestore = getAttributesToRestore(for: attributedString, in: range)
         
-        let attachmentData = PillTextAttachmentData(type: .user(userID: userID), font: font)
+        let attachmentData = PillTextAttachmentData(type: .user(userID: userID), font: attributesToRestore.font)
         guard let attachment = PillTextAttachment(attachmentData: attachmentData) else {
             attributedString.addAttribute(.MatrixUserID, value: userID, range: range)
             
@@ -26,34 +33,151 @@ struct MentionBuilder: MentionBuilderProtocol {
             return
         }
         
-        var attachmentAttributes: [NSAttributedString.Key: Any] = [.link: url, .MatrixUserID: userID, .font: font, .foregroundColor: foregroundColor]
+        var attachmentAttributes: [NSAttributedString.Key: Any] = [.link: url,
-        if let blockquote {
+                                                                   .MatrixUserID: userID,
-            // mentions can be in blockquotes, so if the replaced string was in one, we keep the attribute
+                                                                   .font: attributesToRestore.font,
-            attachmentAttributes[.MatrixBlockquote] = blockquote
+                                                                   .foregroundColor: attributesToRestore.foregroundColor]
-        }
+        attachmentAttributes.addBlockquoteIfNeeded(attributesToRestore.blockquote)
-        let attachmentString = NSMutableAttributedString(attachment: attachment)
+        attachmentAttributes.addMatrixUsernameIfNeeded(userDisplayName)
-        attachmentString.addAttributes(attachmentAttributes, range: NSRange(location: 0, length: attachmentString.length))
+        
-        attributedString.replaceCharacters(in: range, with: attachmentString)
+        setPillAttachment(attachment: attachment,
+                          attributedString: attributedString,
+                          in: range,
+                          with: attachmentAttributes)
     }
     
     func handleAllUsersMention(for attributedString: NSMutableAttributedString, in range: NSRange) {
-        let attributes = attributedString.attributes(at: 0, longestEffectiveRange: nil, in: range)
+        let attributesToRestore = getAttributesToRestore(for: attributedString, in: range)
-        let font = attributes[.font] as? UIFont ?? .preferredFont(forTextStyle: .body)
+
-        let blockquote = attributes[.MatrixBlockquote]
+        let attachmentData = PillTextAttachmentData(type: .allUsers, font: attributesToRestore.font)
-        let foregroundColor = attributes[.foregroundColor] as? UIColor ?? .compound.textPrimary
-        
-        let attachmentData = PillTextAttachmentData(type: .allUsers, font: font)
         guard let attachment = PillTextAttachment(attachmentData: attachmentData) else {
             return
         }
         
-        var attachmentAttributes: [NSAttributedString.Key: Any] = [.font: font, .MatrixAllUsersMention: true, .foregroundColor: foregroundColor]
+        var attachmentAttributes: [NSAttributedString.Key: Any] = [.font: attributesToRestore.font,
-        if let blockquote {
+                                                                   .MatrixAllUsersMention: true,
-            // mentions can be in blockquotes, so if the replaced string was in one, we keep the attribute
+                                                                   .foregroundColor: attributesToRestore.foregroundColor]
-            attachmentAttributes[.MatrixBlockquote] = blockquote
+        attachmentAttributes.addBlockquoteIfNeeded(attributesToRestore.blockquote)
+        
+        setPillAttachment(attachment: attachment,
+                          attributedString: attributedString,
+                          in: range,
+                          with: attachmentAttributes)
+    }
+    
+    func handleRoomIDMention(for attributedString: NSMutableAttributedString, in range: NSRange, url: URL, roomID: String) {
+        let attributesToRestore = getAttributesToRestore(for: attributedString, in: range)
+        
+        let attachmentData = PillTextAttachmentData(type: .roomID(roomID), font: attributesToRestore.font)
+        guard let attachment = PillTextAttachment(attachmentData: attachmentData) else {
+            attributedString.addAttribute(.MatrixRoomID, value: roomID, range: range)
+            return
         }
+        
+        var attachmentAttributes: [NSAttributedString.Key: Any] = [.link: url,
+                                                                   .MatrixRoomID: roomID,
+                                                                   .font: attributesToRestore.font,
+                                                                   .foregroundColor: attributesToRestore.foregroundColor]
+        attachmentAttributes.addBlockquoteIfNeeded(attributesToRestore.blockquote)
+        
+        setPillAttachment(attachment: attachment,
+                          attributedString: attributedString,
+                          in: range,
+                          with: attachmentAttributes)
+    }
+    
+    func handleRoomAliasMention(for attributedString: NSMutableAttributedString, in range: NSRange, url: URL, roomAlias: String) {
+        let attributesToRestore = getAttributesToRestore(for: attributedString, in: range)
+        
+        let attachmentData = PillTextAttachmentData(type: .roomAlias(roomAlias), font: attributesToRestore.font)
+        guard let attachment = PillTextAttachment(attachmentData: attachmentData) else {
+            attributedString.addAttribute(.MatrixRoomAlias, value: roomAlias, range: range)
+            return
+        }
+        
+        var attachmentAttributes: [NSAttributedString.Key: Any] = [.link: url,
+                                                                   .MatrixRoomAlias: roomAlias,
+                                                                   .font: attributesToRestore.font,
+                                                                   .foregroundColor: attributesToRestore.foregroundColor]
+        attachmentAttributes.addBlockquoteIfNeeded(attributesToRestore.blockquote)
+        
+        setPillAttachment(attachment: attachment,
+                          attributedString: attributedString,
+                          in: range,
+                          with: attachmentAttributes)
+    }
+    
+    func handleEventOnRoomAliasMention(for attributedString: NSMutableAttributedString, in range: NSRange, url: URL, eventID: String, roomAlias: String) {
+        let attributesToRestore = getAttributesToRestore(for: attributedString, in: range)
+        
+        let attachmentData = PillTextAttachmentData(type: .event(room: .roomAlias(roomAlias)), font: attributesToRestore.font)
+        guard let attachment = PillTextAttachment(attachmentData: attachmentData) else {
+            attributedString.addAttribute(.MatrixEventOnRoomAlias, value: EventOnRoomAliasAttribute.Value(alias: roomAlias, eventID: eventID), range: range)
+            return
+        }
+        
+        var attachmentAttributes: [NSAttributedString.Key: Any] = [.link: url,
+                                                                   .MatrixEventOnRoomAlias: EventOnRoomAliasAttribute.Value(alias: roomAlias, eventID: eventID),
+                                                                   .font: attributesToRestore.font,
+                                                                   .foregroundColor: attributesToRestore.foregroundColor]
+        attachmentAttributes.addBlockquoteIfNeeded(attributesToRestore.blockquote)
+        
+        setPillAttachment(attachment: attachment,
+                          attributedString: attributedString,
+                          in: range,
+                          with: attachmentAttributes)
+    }
+    
+    func handleEventOnRoomIDMention(for attributedString: NSMutableAttributedString, in range: NSRange, url: URL, eventID: String, roomID: String) {
+        let attributesToRestore = getAttributesToRestore(for: attributedString, in: range)
+        
+        let attachmentData = PillTextAttachmentData(type: .event(room: .roomID(roomID)), font: attributesToRestore.font)
+        guard let attachment = PillTextAttachment(attachmentData: attachmentData) else {
+            attributedString.addAttribute(.MatrixEventOnRoomID, value: EventOnRoomIDAttribute.Value(roomID: roomID, eventID: eventID), range: range)
+            return
+        }
+        
+        var attachmentAttributes: [NSAttributedString.Key: Any] = [.link: url,
+                                                                   .MatrixEventOnRoomID: EventOnRoomIDAttribute.Value(roomID: roomID, eventID: eventID),
+                                                                   .font: attributesToRestore.font,
+                                                                   .foregroundColor: attributesToRestore.foregroundColor]
+        attachmentAttributes.addBlockquoteIfNeeded(attributesToRestore.blockquote)
+        
+        setPillAttachment(attachment: attachment,
+                          attributedString: attributedString,
+                          in: range,
+                          with: attachmentAttributes)
+    }
+    
+    private func getAttributesToRestore(for attributedString: NSMutableAttributedString, in range: NSRange) -> AttributesToRestore {
+        let attributes = attributedString.attributes(at: 0, longestEffectiveRange: nil, in: range)
+        let font = attributes[.font] as? UIFont ?? .preferredFont(forTextStyle: .body)
+        let blockquote = attributes[.MatrixBlockquote] as? Bool
+        let foregroundColor = attributes[.foregroundColor] as? UIColor ?? .compound.textPrimary
+        
+        return AttributesToRestore(font: font, blockquote: blockquote, foregroundColor: foregroundColor)
+    }
+    
+    private func setPillAttachment(attachment: PillTextAttachment,
+                                   attributedString: NSMutableAttributedString,
+                                   in range: NSRange,
+                                   with attributes: [NSAttributedString.Key: Any]) {
         let attachmentString = NSMutableAttributedString(attachment: attachment)
-        attachmentString.addAttributes(attachmentAttributes, range: NSRange(location: 0, length: attachmentString.length))
+        attachmentString.addAttributes(attributes, range: NSRange(location: 0, length: attachmentString.length))
         attributedString.replaceCharacters(in: range, with: attachmentString)
     }
 }
+
+private extension Dictionary where Key == NSAttributedString.Key, Value == Any {
+    mutating func addBlockquoteIfNeeded(_ value: Bool?) {
+        if let value {
+            self[.MatrixBlockquote] = value
+        }
+    }
+    
+    mutating func addMatrixUsernameIfNeeded(_ value: String?) {
+        if let value {
+            self[.MatrixUserDisplayName] = value
+        }
+    }
+}

ElementX/Sources/Other/Pills/PillAttachmentViewProvider.swift

@@ -45,7 +45,7 @@ final class PillAttachmentViewProvider: NSTextAttachmentViewProvider, NSSecureCo
         let mediaProvider: MediaProviderProtocol?
         if ProcessInfo.isXcodePreview || ProcessInfo.isRunningTests {
             // The mock viewModel simulates the loading logic for testing purposes
-            context = PillContext.mock(type: .loadUser(isOwn: false))
+            context = PillContext.mock(viewState: .mention(isOwnMention: false, displayText: "Alice"), delay: .seconds(2))
             mediaProvider = MediaProviderMock(configuration: .init())
         } else if let timelineContext = delegate?.timelineContext {
             context = PillContext(timelineContext: timelineContext, data: pillData)

ElementX/Sources/Other/Pills/PillContext.swift

@@ -10,75 +10,77 @@ import Foundation
 
 @MainActor
 final class PillContext: ObservableObject {
-    struct PillViewState: Equatable {
+    @Published var viewState: PillViewState = .undefined
-        let isOwnMention: Bool
-        let displayText: String
-    }
     
-    @Published private(set) var viewState: PillViewState
+    let data: PillTextAttachmentData
-    
+    var cancellable: AnyCancellable?
-    private var cancellable: AnyCancellable?
     
     init(timelineContext: TimelineViewModel.Context, data: PillTextAttachmentData) {
-        switch data.type {
+        self.data = data
-        case let .user(id):
+        timelineContext.viewState.pillContextUpdater?(self)
-            let isOwnMention = id == timelineContext.viewState.ownUserID
-            if let profile = timelineContext.viewState.members[id] {
-                var name = id
-                if let displayName = profile.displayName {
-                    name = "@\(displayName)"
-                }
-                viewState = PillViewState(isOwnMention: isOwnMention, displayText: name)
-            } else {
-                viewState = PillViewState(isOwnMention: isOwnMention, displayText: id)
-                cancellable = timelineContext.$viewState.sink { [weak self] viewState in
-                    guard let self else {
-                        return
-                    }
-                    if let profile = viewState.members[id] {
-                        var name = id
-                        if let displayName = profile.displayName {
-                            name = "@\(displayName)"
-                        }
-                        self.viewState = PillViewState(isOwnMention: isOwnMention, displayText: name)
-                        cancellable = nil
-                    }
-                }
-            }
-        case .allUsers:
-            viewState = PillViewState(isOwnMention: true, displayText: PillConstants.atRoom)
-        }
     }
 }
 
 extension PillContext {
-    enum MockType {
+    static func mock(viewState: PillViewState, delay: Duration? = nil) -> PillContext {
-        case loadUser(isOwn: Bool)
+        // This is just for previews so the internal data doesn't really matter
-        case loadedUser(isOwn: Bool)
+        let viewModel = PillContext(timelineContext: TimelineViewModel.mock.context, data: PillTextAttachmentData(type: .allUsers, font: .preferredFont(forTextStyle: .body)))
-        case allUsers
+        if let delay {
+            viewModel.viewState = .mention(isOwnMention: false, displayText: "placeholder")
+            Task {
+                try? await Task.sleep(for: delay)
+                viewModel.viewState = viewState
+            }
+        } else {
+            viewModel.viewState = viewState
+        }
+        return viewModel
+    }
+}
+
+enum PillViewState: Equatable {
+    enum PillImage: Equatable {
+        case link
+        case roomAvatar(RoomAvatar)
     }
     
-    static func mock(type: MockType) -> PillContext {
+    case mention(isOwnMention: Bool, displayText: String)
-        let testID = "@test:test.com"
+    case reference(avatar: PillImage, displayText: String)
-        let pillType: PillType
+    case undefined
-        switch type {
+    
-        case .loadUser(let isOwn):
+    var isOwnMention: Bool {
-            pillType = .user(userID: testID)
+        switch self {
-            let viewModel = PillContext(timelineContext: TimelineViewModel.mock.context, data: PillTextAttachmentData(type: pillType, font: .preferredFont(forTextStyle: .body)))
+        case .mention(let isOwnMention, _):
-            viewModel.viewState = PillViewState(isOwnMention: isOwn, displayText: testID)
+            return isOwnMention
-            Task {
+        default:
-                try? await Task.sleep(for: .seconds(2))
+            return false
-                viewModel.viewState = PillViewState(isOwnMention: isOwn, displayText: "@Test Long Display Text")
+        }
-            }
+    }
-            return viewModel
+    
-        case .loadedUser(let isOwn):
+    var displayText: String {
-            pillType = .user(userID: "@test:test.com")
+        switch self {
-            let viewModel = PillContext(timelineContext: TimelineViewModel.mock.context, data: PillTextAttachmentData(type: pillType, font: .preferredFont(forTextStyle: .body)))
+        case .mention(_, let displayText), .reference(_, let displayText):
-            viewModel.viewState = PillViewState(isOwnMention: isOwn, displayText: "@Very Very Long Test Display Text")
+            return displayText
-            return viewModel
+        case .undefined:
-        case .allUsers:
+            return ""
-            pillType = .allUsers
+        }
-            return PillContext(timelineContext: TimelineViewModel.mock.context, data: PillTextAttachmentData(type: pillType, font: .preferredFont(forTextStyle: .body)))
+    }
+    
+    var isUndefined: Bool {
+        switch self {
+        case .undefined:
+            return true
+        default:
+            return false
+        }
+    }
+    
+    var image: PillImage? {
+        switch self {
+        case .reference(let avatar, _):
+            return avatar
+        default:
+            return nil
         }
     }
 }

ElementX/Sources/Other/Pills/PillTextAttachmentData.swift

@@ -9,6 +9,21 @@ import Foundation
 import UIKit
 
 enum PillType: Codable, Equatable {
+    enum EventRoom: Codable, Equatable {
+        case roomAlias(String)
+        case roomID(String)
+        
+        var value: String {
+            switch self {
+            case .roomAlias(let value), .roomID(let value):
+                return value
+            }
+        }
+    }
+    
+    case event(room: EventRoom)
+    case roomAlias(String)
+    case roomID(String)
     /// A pill that mentions a user
     case user(userID: String)
     /// A pill that mentions all users in a room

ElementX/Sources/Other/Pills/PillView.swift

@@ -5,6 +5,7 @@
 // Please see LICENSE files in the repository root for full details.
 //
 
+import Compound
 import SwiftUI
 
 struct PillView: View {
@@ -22,18 +23,42 @@ struct PillView: View {
     }
         
     var body: some View {
-        Text(context.viewState.displayText)
+        mainContent
-            .font(.compound.bodyLGSemibold)
-            .foregroundColor(textColor)
-            .lineLimit(1)
-            .padding(.leading, 4)
-            .padding(.trailing, 6)
-            .padding(.vertical, 1)
-            .background { Capsule().foregroundColor(backgroundColor) }
             .onChange(of: context.viewState.displayText) {
                 didChangeText()
             }
     }
+    
+    @ViewBuilder
+    private var mainContent: some View {
+        HStack(spacing: 4) {
+            image
+            Text(context.viewState.displayText)
+                .font(.compound.bodyLGSemibold)
+                .foregroundColor(textColor)
+                .lineLimit(1)
+        }
+        .padding(.leading, 4)
+        .padding(.trailing, 6)
+        .padding(.vertical, 1)
+        .background { Capsule().foregroundColor(backgroundColor) }
+    }
+    
+    @ViewBuilder
+    private var image: some View {
+        if let image = context.viewState.image {
+            switch image {
+            case .link:
+                CompoundIcon(\.link, size: .custom(12), relativeTo: .compound.bodyLGSemibold)
+                    .padding(2)
+                    .foregroundStyle(.compound.bgCanvasDefault)
+                    .background(.compound.textLinkExternal)
+                    .clipShape(Circle())
+            case .roomAvatar(let avatar):
+                RoomAvatarImage(avatar: avatar, avatarSize: .custom(16), mediaProvider: mediaProvider)
+            }
+        }
+    }
 }
 
 struct PillView_Previews: PreviewProvider, TestablePreview {
@@ -41,24 +66,27 @@ struct PillView_Previews: PreviewProvider, TestablePreview {
     
     static var previews: some View {
         PillView(mediaProvider: mockMediaProvider,
-                 context: PillContext.mock(type: .loadUser(isOwn: false))) { }
+                 context: PillContext.mock(viewState: .mention(isOwnMention: false,
+                                                               displayText: "@Alice"))) { }
             .frame(maxWidth: PillConstants.mockMaxWidth)
-            .previewDisplayName("Loading")
+            .previewDisplayName("User")
         PillView(mediaProvider: mockMediaProvider,
-                 context: PillContext.mock(type: .loadUser(isOwn: true))) { }
+                 context: PillContext.mock(viewState: .mention(isOwnMention: false,
+                                                               displayText: "@Alice but with a very very long name"))) { }
             .frame(maxWidth: PillConstants.mockMaxWidth)
-            .previewDisplayName("Loading Own")
+            .previewDisplayName("User with a long name")
         PillView(mediaProvider: mockMediaProvider,
-                 context: PillContext.mock(type: .loadedUser(isOwn: false))) { }
+                 context: PillContext.mock(viewState: .mention(isOwnMention: true,
+                                                               displayText: "@Alice"))) { }
             .frame(maxWidth: PillConstants.mockMaxWidth)
-            .previewDisplayName("Loaded Long")
+            .previewDisplayName("Own user")
         PillView(mediaProvider: mockMediaProvider,
-                 context: PillContext.mock(type: .loadedUser(isOwn: true))) { }
+                 context: PillContext.mock(viewState: .reference(avatar: .roomAvatar(.room(id: "roomID", name: "Room", avatarURL: nil)), displayText: "Room"))) { }
             .frame(maxWidth: PillConstants.mockMaxWidth)
-            .previewDisplayName("Loaded Long Own")
+            .previewDisplayName("Room")
         PillView(mediaProvider: mockMediaProvider,
-                 context: PillContext.mock(type: .allUsers)) { }
+                 context: PillContext.mock(viewState: .reference(avatar: .link, displayText: L10n.screenRoomEventPill("Room")))) { }
             .frame(maxWidth: PillConstants.mockMaxWidth)
-            .previewDisplayName("All Users")
+            .previewDisplayName("Message link")
     }
 }

ElementX/Sources/Other/Pills/PlainMentionBuilder.swift

@@ -9,6 +9,12 @@ import Foundation
 
 // In the future we might use this to do some customisation in what is plain text used to represent mentions.
 struct PlainMentionBuilder: MentionBuilderProtocol {
+    func handleEventOnRoomAliasMention(for attributedString: NSMutableAttributedString, in range: NSRange, url: URL, eventID: String, roomAlias: String) { }
+    
+    func handleEventOnRoomIDMention(for attributedString: NSMutableAttributedString, in range: NSRange, url: URL, eventID: String, roomID: String) { }
+    
+    func handleRoomAliasMention(for attributedString: NSMutableAttributedString, in range: NSRange, url: URL, roomAlias: String) { }
+    
     func handleAllUsersMention(for attributedString: NSMutableAttributedString, in range: NSRange) { }
     
     func handleUserMention(for attributedString: NSMutableAttributedString, in range: NSRange, url: URL, userID: String, userDisplayName: String?) {
@@ -17,4 +23,6 @@ struct PlainMentionBuilder: MentionBuilderProtocol {
         }
         attributedString.insert(NSAttributedString(string: "@"), at: range.location)
     }
+    
+    func handleRoomIDMention(for attributedString: NSMutableAttributedString, in range: NSRange, url: URL, roomID: String) { }
 }

ElementX/Sources/Screens/HomeScreen/View/HomeScreenInviteCell.swift

@@ -193,6 +193,7 @@ private extension HomeScreenRoom {
                                   unreadNotificationsCount: 0,
                                   notificationMode: nil,
                                   canonicalAlias: "#footest:somewhere.org",
+                                  alternativeAliases: [],
                                   hasOngoingCall: false,
                                   isMarkedUnread: false,
                                   isFavourite: false)
@@ -220,6 +221,7 @@ private extension HomeScreenRoom {
                                   unreadNotificationsCount: 0,
                                   notificationMode: nil,
                                   canonicalAlias: alias,
+                                  alternativeAliases: [],
                                   hasOngoingCall: false,
                                   isMarkedUnread: false,
                                   isFavourite: false)

ElementX/Sources/Screens/HomeScreen/View/HomeScreenKnockedCell.swift

@@ -157,6 +157,7 @@ private extension HomeScreenRoom {
                                   unreadNotificationsCount: 0,
                                   notificationMode: nil,
                                   canonicalAlias: "#footest:somewhere.org",
+                                  alternativeAliases: [],
                                   hasOngoingCall: false,
                                   isMarkedUnread: false,
                                   isFavourite: false)
@@ -184,6 +185,7 @@ private extension HomeScreenRoom {
                                   unreadNotificationsCount: 0,
                                   notificationMode: nil,
                                   canonicalAlias: alias,
+                                  alternativeAliases: [],
                                   hasOngoingCall: false,
                                   isMarkedUnread: false,
                                   isFavourite: false)

ElementX/Sources/Screens/MediaEventsTimelineScreen/MediaEventsTimelineScreenCoordinator.swift

@@ -19,6 +19,7 @@ struct MediaEventsTimelineScreenCoordinatorParameters {
     let emojiProvider: EmojiProviderProtocol
     let userIndicatorController: UserIndicatorControllerProtocol
     let timelineControllerFactory: TimelineControllerFactoryProtocol
+    let clientProxy: ClientProxyProtocol
 }
 
 enum MediaEventsTimelineScreenCoordinatorAction {
@@ -49,7 +50,8 @@ final class MediaEventsTimelineScreenCoordinator: CoordinatorProtocol {
                                                        appSettings: ServiceLocator.shared.settings,
                                                        analyticsService: ServiceLocator.shared.analytics,
                                                        emojiProvider: parameters.emojiProvider,
-                                                       timelineControllerFactory: parameters.timelineControllerFactory)
+                                                       timelineControllerFactory: parameters.timelineControllerFactory,
+                                                       clientProxy: parameters.clientProxy)
         
         let filesTimelineViewModel = TimelineViewModel(roomProxy: parameters.roomProxy,
                                                        timelineController: parameters.filesTimelineController,
@@ -61,7 +63,8 @@ final class MediaEventsTimelineScreenCoordinator: CoordinatorProtocol {
                                                        appSettings: ServiceLocator.shared.settings,
                                                        analyticsService: ServiceLocator.shared.analytics,
                                                        emojiProvider: parameters.emojiProvider,
-                                                       timelineControllerFactory: parameters.timelineControllerFactory)
+                                                       timelineControllerFactory: parameters.timelineControllerFactory,
+                                                       clientProxy: parameters.clientProxy)
         
         viewModel = MediaEventsTimelineScreenViewModel(mediaTimelineViewModel: mediaTimelineViewModel,
                                                        filesTimelineViewModel: filesTimelineViewModel,

ElementX/Sources/Screens/MediaEventsTimelineScreen/View/MediaEventsTimelineScreen.swift

@@ -274,6 +274,7 @@ struct MediaEventsTimelineScreen_Previews: PreviewProvider, TestablePreview {
                                  appSettings: ServiceLocator.shared.settings,
                                  analyticsService: ServiceLocator.shared.analytics,
                                  emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings),
-                                 timelineControllerFactory: TimelineControllerFactoryMock(.init()))
+                                 timelineControllerFactory: TimelineControllerFactoryMock(.init()),
+                                 clientProxy: ClientProxyMock(.init()))
     }
 }

ElementX/Sources/Screens/PinnedEventsTimelineScreen/PinnedEventsTimelineScreenCoordinator.swift

@@ -17,6 +17,7 @@ struct PinnedEventsTimelineScreenCoordinatorParameters {
     let appMediator: AppMediatorProtocol
     let emojiProvider: EmojiProviderProtocol
     let timelineControllerFactory: TimelineControllerFactoryProtocol
+    let clientProxy: ClientProxyProtocol
 }
 
 enum PinnedEventsTimelineScreenCoordinatorAction {
@@ -53,7 +54,8 @@ final class PinnedEventsTimelineScreenCoordinator: CoordinatorProtocol {
                                               appSettings: ServiceLocator.shared.settings,
                                               analyticsService: ServiceLocator.shared.analytics,
                                               emojiProvider: parameters.emojiProvider,
-                                              timelineControllerFactory: parameters.timelineControllerFactory)
+                                              timelineControllerFactory: parameters.timelineControllerFactory,
+                                              clientProxy: parameters.clientProxy)
     }
     
     func start() {

ElementX/Sources/Screens/PinnedEventsTimelineScreen/View/PinnedEventsTimelineScreen.swift

@@ -99,7 +99,8 @@ struct PinnedEventsTimelineScreen_Previews: PreviewProvider, TestablePreview {
                                  appSettings: ServiceLocator.shared.settings,
                                  analyticsService: ServiceLocator.shared.analytics,
                                  emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings),
-                                 timelineControllerFactory: TimelineControllerFactoryMock(.init()))
+                                 timelineControllerFactory: TimelineControllerFactoryMock(.init()),
+                                 clientProxy: ClientProxyMock(.init()))
     }()
         
     static var previews: some View {

ElementX/Sources/Screens/RoomScreen/RoomScreenCoordinator.swift

@@ -86,7 +86,8 @@ final class RoomScreenCoordinator: CoordinatorProtocol {
                                               appSettings: parameters.appSettings,
                                               analyticsService: ServiceLocator.shared.analytics,
                                               emojiProvider: parameters.emojiProvider,
-                                              timelineControllerFactory: parameters.timelineControllerFactory)
+                                              timelineControllerFactory: parameters.timelineControllerFactory,
+                                              clientProxy: parameters.clientProxy)
 
         wysiwygViewModel = WysiwygComposerViewModel(minHeight: ComposerConstant.minHeight,
                                                     maxCompressedHeight: ComposerConstant.maxHeight,

ElementX/Sources/Screens/RoomScreen/View/RoomScreen.swift

@@ -266,7 +266,8 @@ struct RoomScreen_Previews: PreviewProvider, TestablePreview {
                                                      appSettings: ServiceLocator.shared.settings,
                                                      analyticsService: ServiceLocator.shared.analytics,
                                                      emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings),
-                                                     timelineControllerFactory: TimelineControllerFactoryMock(.init()))
+                                                     timelineControllerFactory: TimelineControllerFactoryMock(.init()),
+                                                     clientProxy: ClientProxyMock(.init()))
 
     static var previews: some View {
         NavigationStack {

ElementX/Sources/Screens/Timeline/TimelineInteractionHandler.swift

@@ -41,6 +41,7 @@ class TimelineInteractionHandler {
     private let emojiProvider: EmojiProviderProtocol
     private let timelineControllerFactory: TimelineControllerFactoryProtocol
     private let pollInteractionHandler: PollInteractionHandlerProtocol
+    private let clientProxy: ClientProxyProtocol
     
     private let actionsSubject: PassthroughSubject<TimelineInteractionHandlerAction, Never> = .init()
     var actions: AnyPublisher<TimelineInteractionHandlerAction, Never> {
@@ -66,7 +67,8 @@ class TimelineInteractionHandler {
          appSettings: AppSettings,
          analyticsService: AnalyticsService,
          emojiProvider: EmojiProviderProtocol,
-         timelineControllerFactory: TimelineControllerFactoryProtocol) {
+         timelineControllerFactory: TimelineControllerFactoryProtocol,
+         clientProxy: ClientProxyProtocol) {
         self.roomProxy = roomProxy
         self.timelineController = timelineController
         self.mediaProvider = mediaProvider
@@ -79,6 +81,7 @@ class TimelineInteractionHandler {
         self.analyticsService = analyticsService
         self.emojiProvider = emojiProvider
         self.timelineControllerFactory = timelineControllerFactory
+        self.clientProxy = clientProxy
         pollInteractionHandler = PollInteractionHandler(analyticsService: analyticsService, roomProxy: roomProxy)
     }
     
@@ -580,7 +583,8 @@ class TimelineInteractionHandler {
                                                       appSettings: appSettings,
                                                       analyticsService: analyticsService,
                                                       emojiProvider: emojiProvider,
-                                                      timelineControllerFactory: timelineControllerFactory)
+                                                      timelineControllerFactory: timelineControllerFactory,
+                                                      clientProxy: clientProxy)
             
             return .displayMediaPreview(item: item, timelineViewModel: .new(timelineViewModel))
         } else {

ElementX/Sources/Screens/Timeline/TimelineModels.swift

@@ -114,6 +114,9 @@ struct TimelineViewState: BindableState {
     /// A closure providing the associated audio player state for an item in the timeline.
     var audioPlayerStateProvider: (@MainActor (_ itemId: TimelineItemIdentifier) -> AudioPlayerState?)?
     
+    /// A closure that updates the associated pill context
+    var pillContextUpdater: (@MainActor (PillContext) -> Void)?
+    
     var emojiProvider: EmojiProviderProtocol
 }
 

ElementX/Sources/Screens/Timeline/TimelineViewModel.swift

@@ -31,6 +31,7 @@ class TimelineViewModel: TimelineViewModelType, TimelineViewModelProtocol {
     private let analyticsService: AnalyticsService
     private let emojiProvider: EmojiProviderProtocol
     private let timelineControllerFactory: TimelineControllerFactoryProtocol
+    private let clientProxy: ClientProxyProtocol
     
     private let timelineInteractionHandler: TimelineInteractionHandler
     
@@ -55,7 +56,8 @@ class TimelineViewModel: TimelineViewModelType, TimelineViewModelProtocol {
          appSettings: AppSettings,
          analyticsService: AnalyticsService,
          emojiProvider: EmojiProviderProtocol,
-         timelineControllerFactory: TimelineControllerFactoryProtocol) {
+         timelineControllerFactory: TimelineControllerFactoryProtocol,
+         clientProxy: ClientProxyProtocol) {
         self.timelineController = timelineController
         self.mediaProvider = mediaProvider
         self.mediaPlayerProvider = mediaPlayerProvider
@@ -66,6 +68,7 @@ class TimelineViewModel: TimelineViewModelType, TimelineViewModelProtocol {
         self.appMediator = appMediator
         self.emojiProvider = emojiProvider
         self.timelineControllerFactory = timelineControllerFactory
+        self.clientProxy = clientProxy
         
         let voiceMessageRecorder = VoiceMessageRecorder(audioRecorder: AudioRecorder(), mediaPlayerProvider: mediaPlayerProvider)
         
@@ -80,7 +83,8 @@ class TimelineViewModel: TimelineViewModelType, TimelineViewModelProtocol {
                                                                 appSettings: appSettings,
                                                                 analyticsService: analyticsService,
                                                                 emojiProvider: emojiProvider,
-                                                                timelineControllerFactory: timelineControllerFactory)
+                                                                timelineControllerFactory: timelineControllerFactory,
+                                                                clientProxy: clientProxy)
         
         super.init(initialViewState: TimelineViewState(timelineKind: timelineController.timelineKind,
                                                        roomID: roomProxy.id,
@@ -113,6 +117,10 @@ class TimelineViewModel: TimelineViewModelType, TimelineViewModelProtocol {
             return self.timelineInteractionHandler.audioPlayerState(for: itemID)
         }
         
+        state.pillContextUpdater = { [weak self] pillContext in
+            self?.pillContextUpdater(pillContext)
+        }
+        
         state.timelineState.paginationState = timelineController.paginationState
         buildTimelineViews(timelineItems: timelineController.timelineItems)
         
@@ -826,6 +834,72 @@ class TimelineViewModel: TimelineViewModelType, TimelineViewModelProtocol {
         actionsSubject.send(.displayMessageForwarding(forwardingItem: .init(id: itemID, roomID: roomProxy.id, content: content)))
     }
     
+    // MARK: Pills
+    
+    private func pillContextUpdater(_ pillContext: PillContext) {
+        switch pillContext.data.type {
+        case let .user(id):
+            let isOwnMention = id == state.ownUserID
+            if let profile = state.members[id] {
+                var name = id
+                if let displayName = profile.displayName {
+                    name = "@\(displayName)"
+                }
+                pillContext.viewState = .mention(isOwnMention: isOwnMention, displayText: name)
+            } else {
+                pillContext.viewState = .mention(isOwnMention: isOwnMention, displayText: id)
+                pillContext.cancellable = context.$viewState
+                    .compactMap { $0.members[id] }
+                    .sink { [weak pillContext] profile in
+                        guard let pillContext else {
+                            return
+                        }
+                        
+                        var name = id
+                        if let displayName = profile.displayName {
+                            name = "@\(displayName)"
+                        }
+                        pillContext.viewState = .mention(isOwnMention: isOwnMention, displayText: name)
+                        pillContext.cancellable = nil
+                    }
+            }
+        case .allUsers:
+            pillContext.viewState = .mention(isOwnMention: true, displayText: PillConstants.atRoom)
+        case .event(let room):
+            var pillViewState: PillViewState = .reference(avatar: .link, displayText: L10n.screenRoomEventPill(room.value))
+            defer {
+                pillContext.viewState = pillViewState
+            }
+            
+            switch room {
+            case .roomAlias(let alias):
+                guard let roomSummary = clientProxy.roomSummaryForAlias(alias) else {
+                    return
+                }
+                // We always show the link image for event permalinks
+                pillViewState = .reference(avatar: .link, displayText: L10n.screenRoomEventPill(roomSummary.name))
+            case .roomID(let id):
+                guard let roomSummary = clientProxy.roomSummaryForIdentifier(id) else {
+                    return
+                }
+                // We always show the link image for event permalinks
+                pillViewState = .reference(avatar: .link, displayText: L10n.screenRoomEventPill(roomSummary.name))
+            }
+        case .roomAlias(let alias):
+            guard let roomSummary = clientProxy.roomSummaryForAlias(alias) else {
+                pillContext.viewState = .reference(avatar: .link, displayText: alias)
+                return
+            }
+            pillContext.viewState = .reference(avatar: .roomAvatar(roomSummary.avatar), displayText: roomSummary.name)
+        case .roomID(let id):
+            guard let roomSummary = clientProxy.roomSummaryForIdentifier(id) else {
+                pillContext.viewState = .reference(avatar: .link, displayText: id)
+                return
+            }
+            pillContext.viewState = .reference(avatar: .roomAvatar(roomSummary.avatar), displayText: roomSummary.name)
+        }
+    }
+    
     // MARK: - User Indicators
     
     private func showFocusLoadingIndicator() {
@@ -896,7 +970,8 @@ extension TimelineViewModel {
                           appSettings: ServiceLocator.shared.settings,
                           analyticsService: ServiceLocator.shared.analytics,
                           emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings),
-                          timelineControllerFactory: TimelineControllerFactoryMock(.init()))
+                          timelineControllerFactory: TimelineControllerFactoryMock(.init()),
+                          clientProxy: ClientProxyMock(.init()))
     }
 }
 

ElementX/Sources/Screens/Timeline/View/ReadReceipts/ReadReceiptsSummaryView.swift

@@ -53,7 +53,8 @@ struct ReadReceiptsSummaryView_Previews: PreviewProvider, TestablePreview {
                                      appSettings: ServiceLocator.shared.settings,
                                      analyticsService: ServiceLocator.shared.analytics,
                                      emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings),
-                                     timelineControllerFactory: TimelineControllerFactoryMock(.init()))
+                                     timelineControllerFactory: TimelineControllerFactoryMock(.init()),
+                                     clientProxy: ClientProxyMock(.init()))
         return mock
     }()
     

ElementX/Sources/Screens/Timeline/View/Style/TimelineItemBubbledStylerView.swift

@@ -339,7 +339,8 @@ struct TimelineItemBubbledStylerView_Previews: PreviewProvider, TestablePreview
                                  appSettings: ServiceLocator.shared.settings,
                                  analyticsService: ServiceLocator.shared.analytics,
                                  emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings),
-                                 timelineControllerFactory: TimelineControllerFactoryMock(.init()))
+                                 timelineControllerFactory: TimelineControllerFactoryMock(.init()),
+                                 clientProxy: ClientProxyMock(.init()))
     }()
 
     static var previews: some View {

ElementX/Sources/Screens/Timeline/View/Supplementary/TimelineReadReceiptsView.swift

@@ -88,8 +88,9 @@ struct TimelineReadReceiptsView_Previews: PreviewProvider, TestablePreview {
                                              appSettings: ServiceLocator.shared.settings,
                                              analyticsService: ServiceLocator.shared.analytics,
                                              emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings),
-                                             timelineControllerFactory: TimelineControllerFactoryMock(.init()))
+                                             timelineControllerFactory: TimelineControllerFactoryMock(.init()),
-
+                                             clientProxy: ClientProxyMock(.init()))
+    
     static let singleReceipt = [ReadReceipt(userID: RoomMemberProxyMock.mockAlice.userID, formattedTimestamp: "Now")]
     static let doubleReceipt = [ReadReceipt(userID: RoomMemberProxyMock.mockAlice.userID, formattedTimestamp: "Now"),
                                 ReadReceipt(userID: RoomMemberProxyMock.mockBob.userID, formattedTimestamp: "Before")]

ElementX/Sources/Screens/Timeline/View/TimelineItemViews/FormattedBodyText.swift

@@ -142,8 +142,6 @@ struct FormattedBodyText_Previews: PreviewProvider, TestablePreview {
         let htmlStrings = [
             """
             Plain text\n
-            @bob:matrix.org\n
-            #room:matrix.org\n
             !room:matrix.org\n
             https://www.matrix.org\n
             www.matrix.org\n

ElementX/Sources/Screens/Timeline/View/TimelineItemViews/HighlightedTimelineItemModifier.swift

@@ -98,7 +98,8 @@ struct HighlightedTimelineItemTimeline_Previews: PreviewProvider {
                                                      appSettings: ServiceLocator.shared.settings,
                                                      analyticsService: ServiceLocator.shared.analytics,
                                                      emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings),
-                                                     timelineControllerFactory: TimelineControllerFactoryMock(.init()))
+                                                     timelineControllerFactory: TimelineControllerFactoryMock(.init()),
+                                                     clientProxy: ClientProxyMock(.init()))
 
     static var previews: some View {
         NavigationStack {

ElementX/Sources/Screens/Timeline/View/TimelineView.swift

@@ -91,7 +91,8 @@ struct TimelineView_Previews: PreviewProvider, TestablePreview {
                                                      appSettings: ServiceLocator.shared.settings,
                                                      analyticsService: ServiceLocator.shared.analytics,
                                                      emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings),
-                                                     timelineControllerFactory: TimelineControllerFactoryMock(.init()))
+                                                     timelineControllerFactory: TimelineControllerFactoryMock(.init()),
+                                                     clientProxy: ClientProxyMock(.init()))
 
     static var previews: some View {
         NavigationStack {

ElementX/Sources/Services/Client/ClientProxy.swift

@@ -515,6 +515,18 @@ class ClientProxy: ClientProxyProtocol {
             return .failure(.sdkError(error))
         }
     }
+    
+    func roomSummaryForIdentifier(_ identifier: String) -> RoomSummary? {
+        // the alternate room summary provider is not impacted by filtering
+        alternateRoomSummaryProvider?.roomListPublisher.value.first { $0.id == identifier }
+    }
+    
+    func roomSummaryForAlias(_ alias: String) -> RoomSummary? {
+        // the alternate room summary provider is not impacted by filtering
+        alternateRoomSummaryProvider?.roomListPublisher.value.first { roomSummary in
+            roomSummary.canonicalAlias == alias || roomSummary.alternativeAliases.contains(alias)
+        }
+    }
 
     func loadUserDisplayName() async -> Result<Void, ClientProxyError> {
         do {

ElementX/Sources/Services/Client/ClientProxyProtocol.swift

@@ -142,6 +142,10 @@ protocol ClientProxyProtocol: AnyObject, MediaLoaderProtocol {
     
     func roomPreviewForIdentifier(_ identifier: String, via: [String]) async -> Result<RoomPreviewProxyProtocol, ClientProxyError>
     
+    func roomSummaryForIdentifier(_ identifier: String) -> RoomSummary?
+    
+    func roomSummaryForAlias(_ alias: String) -> RoomSummary?
+    
     @discardableResult func loadUserDisplayName() async -> Result<Void, ClientProxyError>
     
     func setUserDisplayName(_ name: String) async -> Result<Void, ClientProxyError>

ElementX/Sources/Services/Room/RoomPreview/RoomPreviewProxyProtocol.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+/// A preview object for the Room. useful to get all the possible info for rooms to which the user is not invited to
 // sourcery: AutoMockable
 protocol RoomPreviewProxyProtocol {
     var info: RoomPreviewInfoProxy { get }

ElementX/Sources/Services/Room/RoomProxyProtocol.swift

@@ -18,6 +18,7 @@ enum RoomProxyError: Error {
     case missingTransactionID
 }
 
+/// An enum that describes the relationship between the current user and the room, and contains a reference to the specific implementation of the `RoomProxy`.
 enum RoomProxyType {
     case joined(JoinedRoomProxyProtocol)
     case invited(InvitedRoomProxyProtocol)

ElementX/Sources/Services/Room/RoomSummary/RoomSummary.swift

@@ -8,6 +8,7 @@
 import Foundation
 import MatrixRustSDK
 
+/// A quick summary of a Room, useful to describe and give quick informations for the room list
 struct RoomSummary {
     enum JoinRequestType {
         case invite(inviter: RoomMemberProxyProtocol?)
@@ -45,6 +46,7 @@ struct RoomSummary {
     let unreadNotificationsCount: UInt
     let notificationMode: RoomNotificationModeProxy?
     let canonicalAlias: String?
+    let alternativeAliases: Set<String>
     
     let hasOngoingCall: Bool
     
@@ -99,6 +101,7 @@ extension RoomSummary {
         unreadNotificationsCount = hasUnreadNotifications ? 1 : 0
         notificationMode = settingsMode
         canonicalAlias = nil
+        alternativeAliases = []
         hasOngoingCall = false
         
         joinRequestType = nil

ElementX/Sources/Services/Room/RoomSummary/RoomSummaryProvider.swift

@@ -275,6 +275,7 @@ class RoomSummaryProvider: RoomSummaryProviderProtocol {
                            unreadNotificationsCount: UInt(roomInfo.numUnreadNotifications),
                            notificationMode: notificationMode,
                            canonicalAlias: roomInfo.canonicalAlias,
+                           alternativeAliases: .init(roomInfo.alternativeAliases),
                            hasOngoingCall: roomInfo.hasRoomCall,
                            isMarkedUnread: roomInfo.isMarkedUnread,
                            isFavourite: roomInfo.isFavourite)

UnitTests/Sources/AttributedStringBuilderTests.swift

@@ -425,14 +425,88 @@ class AttributedStringBuilderTests: XCTestCase {
         XCTAssertEqual(numberOfBlockquotes, 3, "Couldn't find all the blockquotes")
     }
     
-    func testUserMentionAtachment() {
+    func testUserPermalinkMentionAtachment() {
         let string = "https://matrix.to/#/@test:matrix.org"
         let attributedStringFromHTML = attributedStringBuilder.fromHTML(string)
         XCTAssertNotNil(attributedStringFromHTML?.attachment)
-        XCTAssertNotNil(attributedStringFromHTML?.link)
+        XCTAssertEqual(attributedStringFromHTML?.userID, "@test:matrix.org")
+        XCTAssertEqual(attributedStringFromHTML?.link?.absoluteString, string)
         let attributedStringFromPlain = attributedStringBuilder.fromPlain(string)
         XCTAssertNotNil(attributedStringFromPlain?.attachment)
-        XCTAssertNotNil(attributedStringFromHTML?.link)
+        XCTAssertEqual(attributedStringFromPlain?.userID, "@test:matrix.org")
+        XCTAssertEqual(attributedStringFromPlain?.link?.absoluteString, string)
+    }
+    
+    func testUserIDMentionAtachment() {
+        let string = "@test:matrix.org"
+        let attributedStringFromHTML = attributedStringBuilder.fromHTML(string)
+        XCTAssertNotNil(attributedStringFromHTML?.attachment)
+        XCTAssertEqual(attributedStringFromHTML?.userID, "@test:matrix.org")
+        XCTAssertEqual(attributedStringFromHTML?.link?.absoluteString, "https://matrix.to/#/@test:matrix.org")
+        let attributedStringFromPlain = attributedStringBuilder.fromPlain(string)
+        XCTAssertNotNil(attributedStringFromPlain?.attachment)
+        XCTAssertEqual(attributedStringFromPlain?.userID, "@test:matrix.org")
+        XCTAssertEqual(attributedStringFromPlain?.link?.absoluteString, "https://matrix.to/#/@test:matrix.org")
+    }
+    
+    func testRoomIDPermalinkMentionAttachment() {
+        let string = "https://matrix.to/#/!test:matrix.org"
+        let attributedStringFromHTML = attributedStringBuilder.fromHTML(string)
+        XCTAssertNotNil(attributedStringFromHTML?.attachment)
+        XCTAssertEqual(attributedStringFromHTML?.roomID, "!test:matrix.org")
+        XCTAssertEqual(attributedStringFromHTML?.link?.absoluteString, string)
+        let attributedStringFromPlain = attributedStringBuilder.fromPlain(string)
+        XCTAssertNotNil(attributedStringFromPlain?.attachment)
+        XCTAssertEqual(attributedStringFromHTML?.roomID, "!test:matrix.org")
+        XCTAssertEqual(attributedStringFromPlain?.link?.absoluteString, string)
+    }
+    
+    func testRoomAliasPermalinkMentionAttachment() {
+        let string = "https://matrix.to/#/#test:matrix.org"
+        let attributedStringFromHTML = attributedStringBuilder.fromHTML(string)
+        XCTAssertNotNil(attributedStringFromHTML?.attachment)
+        XCTAssertEqual(attributedStringFromHTML?.roomAlias, "#test:matrix.org")
+        XCTAssertEqual(attributedStringFromHTML?.link?.absoluteString, "https://matrix.to/#/%23test:matrix.org")
+        let attributedStringFromPlain = attributedStringBuilder.fromPlain(string)
+        XCTAssertNotNil(attributedStringFromPlain?.attachment)
+        XCTAssertEqual(attributedStringFromHTML?.roomAlias, "#test:matrix.org")
+        XCTAssertEqual(attributedStringFromPlain?.link?.absoluteString, "https://matrix.to/#/%23test:matrix.org")
+    }
+    
+    func testRoomAliasMentionAttachment() {
+        let string = "#test:matrix.org"
+        let attributedStringFromHTML = attributedStringBuilder.fromHTML(string)
+        XCTAssertNotNil(attributedStringFromHTML?.attachment)
+        XCTAssertEqual(attributedStringFromHTML?.roomAlias, "#test:matrix.org")
+        XCTAssertEqual(attributedStringFromHTML?.link?.absoluteString, "https://matrix.to/#/%23test:matrix.org")
+        let attributedStringFromPlain = attributedStringBuilder.fromPlain(string)
+        XCTAssertNotNil(attributedStringFromPlain?.attachment)
+        XCTAssertEqual(attributedStringFromHTML?.roomAlias, "#test:matrix.org")
+        XCTAssertEqual(attributedStringFromPlain?.link?.absoluteString, "https://matrix.to/#/%23test:matrix.org")
+    }
+    
+    func testEventRoomIDPermalinkMentionAttachment() {
+        let string = "https://matrix.to/#/!test:matrix.org/$test"
+        let attributedStringFromHTML = attributedStringBuilder.fromHTML(string)
+        XCTAssertNotNil(attributedStringFromHTML?.attachment)
+        XCTAssertEqual(attributedStringFromHTML?.eventOnRoomID, .some(.init(roomID: "!test:matrix.org", eventID: "$test")))
+        XCTAssertEqual(attributedStringFromHTML?.link?.absoluteString, string)
+        let attributedStringFromPlain = attributedStringBuilder.fromPlain(string)
+        XCTAssertNotNil(attributedStringFromPlain?.attachment)
+        XCTAssertEqual(attributedStringFromPlain?.eventOnRoomID, .some(.init(roomID: "!test:matrix.org", eventID: "$test")))
+        XCTAssertEqual(attributedStringFromPlain?.link?.absoluteString, string)
+    }
+    
+    func testEventRoomAliasPermalinkMentionAttachment() {
+        let string = "https://matrix.to/#/#test:matrix.org/$test"
+        let attributedStringFromHTML = attributedStringBuilder.fromHTML(string)
+        XCTAssertNotNil(attributedStringFromHTML?.attachment)
+        XCTAssertEqual(attributedStringFromHTML?.eventOnRoomAlias, .some(.init(alias: "#test:matrix.org", eventID: "$test")))
+        XCTAssertEqual(attributedStringFromHTML?.link?.absoluteString, "https://matrix.to/#/%23test:matrix.org/$test")
+        let attributedStringFromPlain = attributedStringBuilder.fromPlain(string)
+        XCTAssertNotNil(attributedStringFromPlain?.attachment)
+        XCTAssertEqual(attributedStringFromPlain?.eventOnRoomAlias, .some(.init(alias: "#test:matrix.org", eventID: "$test")))
+        XCTAssertEqual(attributedStringFromPlain?.link?.absoluteString, "https://matrix.to/#/%23test:matrix.org/$test")
     }
     
     func testUserMentionAtachmentInBlockQuotes() {
@@ -631,7 +705,7 @@ class AttributedStringBuilderTests: XCTestCase {
         XCTAssertEqual(foundLink, url)
         XCTAssertEqual(foundAttachments, 2)
     }
-
+    
     // MARK: - Private
     
     private func checkLinkIn(attributedString: AttributedString?, expectedLink: String, expectedRuns: Int) {

UnitTests/Sources/HomeScreenRoomTests.swift

@@ -34,6 +34,7 @@ class HomeScreenRoomTests: XCTestCase {
                                   unreadNotificationsCount: unreadNotificationsCount,
                                   notificationMode: notificationMode,
                                   canonicalAlias: nil,
+                                  alternativeAliases: [],
                                   hasOngoingCall: hasOngoingCall,
                                   isMarkedUnread: isMarkedUnread,
                                   isFavourite: false)

UnitTests/Sources/LoggingTests.swift

@@ -92,6 +92,7 @@ class LoggingTests: XCTestCase {
                                       unreadNotificationsCount: 0,
                                       notificationMode: nil,
                                       canonicalAlias: nil,
+                                      alternativeAliases: [],
                                       hasOngoingCall: false,
                                       isMarkedUnread: false,
                                       isFavourite: false)

UnitTests/Sources/PillContextTests.swift

@@ -12,7 +12,7 @@ import XCTest
 
 @MainActor
 class PillContextTests: XCTestCase {
-    func testUser() async throws {
+    func testUser() async {
         let id = "@test:matrix.org"
         let proxyMock = JoinedRoomProxyMock(.init(name: "Test"))
         let subject = CurrentValueSubject<[RoomMemberProxyProtocol], Never>([])
@@ -27,7 +27,8 @@ class PillContextTests: XCTestCase {
                                      appSettings: ServiceLocator.shared.settings,
                                      analyticsService: ServiceLocator.shared.analytics,
                                      emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings),
-                                     timelineControllerFactory: TimelineControllerFactoryMock(.init()))
+                                     timelineControllerFactory: TimelineControllerFactoryMock(.init()),
+                                     clientProxy: ClientProxyMock(.init()))
         let context = PillContext(timelineContext: mock.context, data: PillTextAttachmentData(type: .user(userID: id), font: .preferredFont(forTextStyle: .body)))
         
         XCTAssertFalse(context.viewState.isOwnMention)
@@ -39,10 +40,11 @@ class PillContextTests: XCTestCase {
         await Task.yield()
         
         XCTAssertFalse(context.viewState.isOwnMention)
+        XCTAssertNil(context.viewState.image)
         XCTAssertEqual(context.viewState.displayText, "@\(name)")
     }
     
-    func testOwnUser() async throws {
+    func testOwnUser() {
         let id = "@test:matrix.org"
         let proxyMock = JoinedRoomProxyMock(.init(name: "Test", ownUserID: id))
         let subject = CurrentValueSubject<[RoomMemberProxyProtocol], Never>([])
@@ -57,13 +59,15 @@ class PillContextTests: XCTestCase {
                                      appSettings: ServiceLocator.shared.settings,
                                      analyticsService: ServiceLocator.shared.analytics,
                                      emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings),
-                                     timelineControllerFactory: TimelineControllerFactoryMock(.init()))
+                                     timelineControllerFactory: TimelineControllerFactoryMock(.init()),
+                                     clientProxy: ClientProxyMock(.init()))
         let context = PillContext(timelineContext: mock.context, data: PillTextAttachmentData(type: .user(userID: id), font: .preferredFont(forTextStyle: .body)))
         
+        XCTAssertNil(context.viewState.image)
         XCTAssertTrue(context.viewState.isOwnMention)
     }
     
-    func testAllUsers() async throws {
+    func testAllUsers() {
         let avatarURL = URL(string: "https://matrix.jpg")
         let id = "test_room"
         let displayName = "Test"
@@ -80,10 +84,216 @@ class PillContextTests: XCTestCase {
                                      appSettings: ServiceLocator.shared.settings,
                                      analyticsService: ServiceLocator.shared.analytics,
                                      emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings),
-                                     timelineControllerFactory: TimelineControllerFactoryMock(.init()))
+                                     timelineControllerFactory: TimelineControllerFactoryMock(.init()),
+                                     clientProxy: ClientProxyMock(.init()))
         let context = PillContext(timelineContext: mock.context, data: PillTextAttachmentData(type: .allUsers, font: .preferredFont(forTextStyle: .body)))
         
         XCTAssertTrue(context.viewState.isOwnMention)
+        XCTAssertNil(context.viewState.image)
         XCTAssertEqual(context.viewState.displayText, PillConstants.atRoom)
     }
+    
+    func testRoomIDMention() {
+        let proxyMock = JoinedRoomProxyMock(.init())
+        let mockController = MockTimelineController()
+        let clientMock = ClientProxyMock(.init())
+        clientMock.roomSummaryForIdentifierReturnValue = .mock(id: "1", name: "Foundation 🔭🪐🌌")
+        mockController.roomProxy = proxyMock
+        let mock = TimelineViewModel(roomProxy: proxyMock,
+                                     timelineController: mockController,
+                                     mediaProvider: MediaProviderMock(configuration: .init()),
+                                     mediaPlayerProvider: MediaPlayerProviderMock(),
+                                     voiceMessageMediaManager: VoiceMessageMediaManagerMock(),
+                                     userIndicatorController: ServiceLocator.shared.userIndicatorController,
+                                     appMediator: AppMediatorMock.default,
+                                     appSettings: ServiceLocator.shared.settings,
+                                     analyticsService: ServiceLocator.shared.analytics,
+                                     emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings),
+                                     timelineControllerFactory: TimelineControllerFactoryMock(.init()),
+                                     clientProxy: clientMock)
+        let context = PillContext(timelineContext: mock.context, data: PillTextAttachmentData(type: .roomID("1"), font: .preferredFont(forTextStyle: .body)))
+        
+        XCTAssertFalse(context.viewState.isOwnMention)
+        XCTAssertFalse(context.viewState.isUndefined)
+        XCTAssertEqual(context.viewState.image, .roomAvatar(.room(id: "1", name: "Foundation 🔭🪐🌌", avatarURL: nil)))
+        XCTAssertEqual(context.viewState.displayText, "Foundation 🔭🪐🌌")
+    }
+    
+    func testRoomIDMentionMissingRoom() {
+        let proxyMock = JoinedRoomProxyMock(.init())
+        let mockController = MockTimelineController()
+        mockController.roomProxy = proxyMock
+        let mock = TimelineViewModel(roomProxy: proxyMock,
+                                     timelineController: mockController,
+                                     mediaProvider: MediaProviderMock(configuration: .init()),
+                                     mediaPlayerProvider: MediaPlayerProviderMock(),
+                                     voiceMessageMediaManager: VoiceMessageMediaManagerMock(),
+                                     userIndicatorController: ServiceLocator.shared.userIndicatorController,
+                                     appMediator: AppMediatorMock.default,
+                                     appSettings: ServiceLocator.shared.settings,
+                                     analyticsService: ServiceLocator.shared.analytics,
+                                     emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings),
+                                     timelineControllerFactory: TimelineControllerFactoryMock(.init()),
+                                     clientProxy: ClientProxyMock(.init()))
+        let context = PillContext(timelineContext: mock.context, data: PillTextAttachmentData(type: .roomID("1"), font: .preferredFont(forTextStyle: .body)))
+        
+        XCTAssertFalse(context.viewState.isOwnMention)
+        XCTAssertFalse(context.viewState.isUndefined)
+        XCTAssertEqual(context.viewState.image, .link)
+        XCTAssertEqual(context.viewState.displayText, "1")
+    }
+    
+    func testRoomAliasMention() {
+        let proxyMock = JoinedRoomProxyMock(.init())
+        let mockController = MockTimelineController()
+        mockController.roomProxy = proxyMock
+        let clientMock = ClientProxyMock(.init())
+        clientMock.roomSummaryForAliasReturnValue = .mock(id: "2",
+                                                          name: "Foundation and Empire",
+                                                          canonicalAlias: "#foundation-and-empire:matrix.org")
+        let mock = TimelineViewModel(roomProxy: proxyMock,
+                                     timelineController: mockController,
+                                     mediaProvider: MediaProviderMock(configuration: .init()),
+                                     mediaPlayerProvider: MediaPlayerProviderMock(),
+                                     voiceMessageMediaManager: VoiceMessageMediaManagerMock(),
+                                     userIndicatorController: ServiceLocator.shared.userIndicatorController,
+                                     appMediator: AppMediatorMock.default,
+                                     appSettings: ServiceLocator.shared.settings,
+                                     analyticsService: ServiceLocator.shared.analytics,
+                                     emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings),
+                                     timelineControllerFactory: TimelineControllerFactoryMock(.init()),
+                                     clientProxy: clientMock)
+        let context = PillContext(timelineContext: mock.context, data: PillTextAttachmentData(type: .roomAlias("#foundation-and-empire:matrix.org"), font: .preferredFont(forTextStyle: .body)))
+        
+        XCTAssertFalse(context.viewState.isOwnMention)
+        XCTAssertFalse(context.viewState.isUndefined)
+        XCTAssertEqual(context.viewState.image, .roomAvatar(.room(id: "2", name: "Foundation and Empire", avatarURL: nil)))
+        XCTAssertEqual(context.viewState.displayText, "Foundation and Empire")
+    }
+    
+    func testRoomAliasMentionMissingRoom() {
+        let proxyMock = JoinedRoomProxyMock(.init())
+        let mockController = MockTimelineController()
+        mockController.roomProxy = proxyMock
+        let mock = TimelineViewModel(roomProxy: proxyMock,
+                                     timelineController: mockController,
+                                     mediaProvider: MediaProviderMock(configuration: .init()),
+                                     mediaPlayerProvider: MediaPlayerProviderMock(),
+                                     voiceMessageMediaManager: VoiceMessageMediaManagerMock(),
+                                     userIndicatorController: ServiceLocator.shared.userIndicatorController,
+                                     appMediator: AppMediatorMock.default,
+                                     appSettings: ServiceLocator.shared.settings,
+                                     analyticsService: ServiceLocator.shared.analytics,
+                                     emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings),
+                                     timelineControllerFactory: TimelineControllerFactoryMock(.init()),
+                                     clientProxy: ClientProxyMock(.init()))
+        let context = PillContext(timelineContext: mock.context, data: PillTextAttachmentData(type: .roomAlias("#foundation-and-empire:matrix.org"), font: .preferredFont(forTextStyle: .body)))
+        
+        XCTAssertFalse(context.viewState.isOwnMention)
+        XCTAssertFalse(context.viewState.isUndefined)
+        XCTAssertEqual(context.viewState.image, .link)
+        XCTAssertEqual(context.viewState.displayText, "#foundation-and-empire:matrix.org")
+    }
+    
+    func testEventOnRoomIDMention() {
+        let proxyMock = JoinedRoomProxyMock(.init())
+        let mockController = MockTimelineController()
+        mockController.roomProxy = proxyMock
+        let clientMock = ClientProxyMock(.init())
+        clientMock.roomSummaryForIdentifierReturnValue = .mock(id: "1", name: "Foundation 🔭🪐🌌")
+        let mock = TimelineViewModel(roomProxy: proxyMock,
+                                     timelineController: mockController,
+                                     mediaProvider: MediaProviderMock(configuration: .init()),
+                                     mediaPlayerProvider: MediaPlayerProviderMock(),
+                                     voiceMessageMediaManager: VoiceMessageMediaManagerMock(),
+                                     userIndicatorController: ServiceLocator.shared.userIndicatorController,
+                                     appMediator: AppMediatorMock.default,
+                                     appSettings: ServiceLocator.shared.settings,
+                                     analyticsService: ServiceLocator.shared.analytics,
+                                     emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings),
+                                     timelineControllerFactory: TimelineControllerFactoryMock(.init()),
+                                     clientProxy: clientMock)
+        let context = PillContext(timelineContext: mock.context, data: PillTextAttachmentData(type: .event(room: .roomID("1")), font: .preferredFont(forTextStyle: .body)))
+        
+        XCTAssertFalse(context.viewState.isOwnMention)
+        XCTAssertFalse(context.viewState.isUndefined)
+        XCTAssertEqual(context.viewState.image, .link)
+        XCTAssertEqual(context.viewState.displayText, L10n.screenRoomEventPill("Foundation 🔭🪐🌌"))
+    }
+    
+    func testEventOnRoomIDMentionMissingRoom() {
+        let proxyMock = JoinedRoomProxyMock(.init())
+        let mockController = MockTimelineController()
+        mockController.roomProxy = proxyMock
+        let mock = TimelineViewModel(roomProxy: proxyMock,
+                                     timelineController: mockController,
+                                     mediaProvider: MediaProviderMock(configuration: .init()),
+                                     mediaPlayerProvider: MediaPlayerProviderMock(),
+                                     voiceMessageMediaManager: VoiceMessageMediaManagerMock(),
+                                     userIndicatorController: ServiceLocator.shared.userIndicatorController,
+                                     appMediator: AppMediatorMock.default,
+                                     appSettings: ServiceLocator.shared.settings,
+                                     analyticsService: ServiceLocator.shared.analytics,
+                                     emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings),
+                                     timelineControllerFactory: TimelineControllerFactoryMock(.init()),
+                                     clientProxy: ClientProxyMock(.init()))
+        let context = PillContext(timelineContext: mock.context, data: PillTextAttachmentData(type: .event(room: .roomID("1")), font: .preferredFont(forTextStyle: .body)))
+        
+        XCTAssertFalse(context.viewState.isOwnMention)
+        XCTAssertFalse(context.viewState.isUndefined)
+        XCTAssertEqual(context.viewState.image, .link)
+        XCTAssertEqual(context.viewState.displayText, L10n.screenRoomEventPill("1"))
+    }
+    
+    func testEventOnRoomAliasMention() async throws {
+        let proxyMock = JoinedRoomProxyMock(.init())
+        let mockController = MockTimelineController()
+        mockController.roomProxy = proxyMock
+        let clientMock = ClientProxyMock(.init())
+        clientMock.roomSummaryForAliasReturnValue = .mock(id: "2",
+                                                          name: "Foundation and Empire",
+                                                          canonicalAlias: "#foundation-and-empire:matrix.org")
+        let mock = TimelineViewModel(roomProxy: proxyMock,
+                                     timelineController: mockController,
+                                     mediaProvider: MediaProviderMock(configuration: .init()),
+                                     mediaPlayerProvider: MediaPlayerProviderMock(),
+                                     voiceMessageMediaManager: VoiceMessageMediaManagerMock(),
+                                     userIndicatorController: ServiceLocator.shared.userIndicatorController,
+                                     appMediator: AppMediatorMock.default,
+                                     appSettings: ServiceLocator.shared.settings,
+                                     analyticsService: ServiceLocator.shared.analytics,
+                                     emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings),
+                                     timelineControllerFactory: TimelineControllerFactoryMock(.init()),
+                                     clientProxy: clientMock)
+        let context = PillContext(timelineContext: mock.context, data: PillTextAttachmentData(type: .event(room: .roomAlias("#foundation-and-empire:matrix.org")), font: .preferredFont(forTextStyle: .body)))
+        
+        XCTAssertFalse(context.viewState.isOwnMention)
+        XCTAssertFalse(context.viewState.isUndefined)
+        XCTAssertEqual(context.viewState.image, .link)
+        XCTAssertEqual(context.viewState.displayText, L10n.screenRoomEventPill("Foundation and Empire"))
+    }
+    
+    func testEventOnRoomAliasMentionMissingRoom() async throws {
+        let proxyMock = JoinedRoomProxyMock(.init())
+        let mockController = MockTimelineController()
+        mockController.roomProxy = proxyMock
+        let mock = TimelineViewModel(roomProxy: proxyMock,
+                                     timelineController: mockController,
+                                     mediaProvider: MediaProviderMock(configuration: .init()),
+                                     mediaPlayerProvider: MediaPlayerProviderMock(),
+                                     voiceMessageMediaManager: VoiceMessageMediaManagerMock(),
+                                     userIndicatorController: ServiceLocator.shared.userIndicatorController,
+                                     appMediator: AppMediatorMock.default,
+                                     appSettings: ServiceLocator.shared.settings,
+                                     analyticsService: ServiceLocator.shared.analytics,
+                                     emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings),
+                                     timelineControllerFactory: TimelineControllerFactoryMock(.init()),
+                                     clientProxy: ClientProxyMock(.init()))
+        let context = PillContext(timelineContext: mock.context, data: PillTextAttachmentData(type: .event(room: .roomAlias("#foundation-and-empire:matrix.org")), font: .preferredFont(forTextStyle: .body)))
+        
+        XCTAssertFalse(context.viewState.isOwnMention)
+        XCTAssertFalse(context.viewState.isUndefined)
+        XCTAssertEqual(context.viewState.image, .link)
+        XCTAssertEqual(context.viewState.displayText, L10n.screenRoomEventPill("#foundation-and-empire:matrix.org"))
+    }
 }

UnitTests/Sources/RoomSummaryTests.swift

@@ -68,6 +68,7 @@ class RoomSummaryTests: XCTestCase {
                     unreadNotificationsCount: 0,
                     notificationMode: nil,
                     canonicalAlias: nil,
+                    alternativeAliases: [],
                     hasOngoingCall: false,
                     isMarkedUnread: false,
                     isFavourite: false)

UnitTests/Sources/TimelineViewModelTests.swift

@@ -312,7 +312,8 @@ class TimelineViewModelTests: XCTestCase {
                                           appSettings: ServiceLocator.shared.settings,
                                           analyticsService: ServiceLocator.shared.analytics,
                                           emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings),
-                                          timelineControllerFactory: TimelineControllerFactoryMock(.init()))
+                                          timelineControllerFactory: TimelineControllerFactoryMock(.init()),
+                                          clientProxy: ClientProxyMock(.init()))
         return (viewModel, roomProxy, timelineProxy, timelineController)
     }
     
@@ -338,7 +339,8 @@ class TimelineViewModelTests: XCTestCase {
                                           appSettings: ServiceLocator.shared.settings,
                                           analyticsService: ServiceLocator.shared.analytics,
                                           emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings),
-                                          timelineControllerFactory: TimelineControllerFactoryMock(.init()))
+                                          timelineControllerFactory: TimelineControllerFactoryMock(.init()),
+                                          clientProxy: ClientProxyMock(.init()))
         
         let deferred = deferFulfillment(viewModel.context.$viewState) { value in
             value.bindings.readReceiptsSummaryInfo?.orderedReceipts == receipts
@@ -367,7 +369,8 @@ class TimelineViewModelTests: XCTestCase {
                                           appSettings: ServiceLocator.shared.settings,
                                           analyticsService: ServiceLocator.shared.analytics,
                                           emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings),
-                                          timelineControllerFactory: TimelineControllerFactoryMock(.init()))
+                                          timelineControllerFactory: TimelineControllerFactoryMock(.init()),
+                                          clientProxy: ClientProxyMock(.init()))
         XCTAssertEqual(configuration.pinnedEventIDs, viewModel.context.viewState.pinnedEventIDs)
         
         configuration.pinnedEventIDs = ["test1", "test2"]
@@ -394,7 +397,8 @@ class TimelineViewModelTests: XCTestCase {
                                           appSettings: ServiceLocator.shared.settings,
                                           analyticsService: ServiceLocator.shared.analytics,
                                           emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings),
-                                          timelineControllerFactory: TimelineControllerFactoryMock(.init()))
+                                          timelineControllerFactory: TimelineControllerFactoryMock(.init()),
+                                          clientProxy: ClientProxyMock(.init()))
         
         var deferred = deferFulfillment(viewModel.context.$viewState) { value in
             value.canCurrentUserPin
@@ -425,7 +429,8 @@ class TimelineViewModelTests: XCTestCase {
                           appSettings: ServiceLocator.shared.settings,
                           analyticsService: ServiceLocator.shared.analytics,
                           emojiProvider: EmojiProvider(appSettings: ServiceLocator.shared.settings),
-                          timelineControllerFactory: TimelineControllerFactoryMock(.init()))
+                          timelineControllerFactory: TimelineControllerFactoryMock(.init()),
+                          clientProxy: ClientProxyMock(.init()))
     }
 }