diff --git a/Riot/Modules/Room/BubbleReactions/BubbleReactionsViewModel.swift b/Riot/Modules/Room/BubbleReactions/BubbleReactionsViewModel.swift
index 8e362d736..1c7418133 100644
--- a/Riot/Modules/Room/BubbleReactions/BubbleReactionsViewModel.swift
+++ b/Riot/Modules/Room/BubbleReactions/BubbleReactionsViewModel.swift
@@ -94,4 +94,14 @@ import Foundation
 
         self.viewDelegate?.bubbleReactionsViewModel(self, didUpdateViewState: .loaded(reactionsViewData: reactionsViewData, showAllButtonState: showAllButtonState))
     }
+        
+    // MARK: - Hashable
+    
+    override var hash: Int {
+        var hasher = Hasher()
+        hasher.combine(self.aggregatedReactions)
+        hasher.combine(self.eventId)
+        hasher.combine(self.showAll)
+        return hasher.finalize()
+    }
 }
diff --git a/Riot/Modules/Room/BubbleReactions/BubbleReactionsViewModelBuilder.swift b/Riot/Modules/Room/BubbleReactions/BubbleReactionsViewModelBuilder.swift
new file mode 100644
index 000000000..b01cc3e9d
--- /dev/null
+++ b/Riot/Modules/Room/BubbleReactions/BubbleReactionsViewModelBuilder.swift
@@ -0,0 +1,59 @@
+/*
+Copyright 2020 New Vector Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import Foundation
+
+@objcMembers
+final class BubbleReactionsViewModelBuilder: NSObject {
+    
+    func buildForFirstVisibleComponent(of roomBubbleCellData: RoomBubbleCellData) -> BubbleReactionsViewModel? {
+        
+        guard roomBubbleCellData.firstVisibleComponentIndex() != NSNotFound else {
+            return nil
+        }
+        
+        return self.build(from: roomBubbleCellData, componentIndex: roomBubbleCellData.firstVisibleComponentIndex())
+    }
+    
+    func build(from roomBubbleCellData: RoomBubbleCellData, componentIndex: Int) -> BubbleReactionsViewModel? {
+        
+        let isCollapsableCellCollapsed = roomBubbleCellData.collapsable && roomBubbleCellData.collapsed
+        
+        guard isCollapsableCellCollapsed == false else {
+            return nil
+        }
+        
+        guard let bubbleComponents = roomBubbleCellData.bubbleComponents, componentIndex < roomBubbleCellData.bubbleComponents.count else {
+            return nil
+        }
+        
+        let bubbleComponent: MXKRoomBubbleComponent = bubbleComponents[componentIndex]
+        
+        guard let bubbleComponentEvent = bubbleComponent.event,
+            bubbleComponentEvent.isRedactedEvent() == false,
+            let componentEventId = bubbleComponentEvent.eventId,
+            let cellDataReactions = roomBubbleCellData.reactions,
+            let componentReactions = cellDataReactions[componentEventId] as? MXAggregatedReactions,
+            let aggregatedReactions = componentReactions.withNonZeroCount() else {
+                return nil
+        }
+        
+        let showAllReactions = roomBubbleCellData.showAllReactions(forEvent: componentEventId)
+        return BubbleReactionsViewModel(aggregatedReactions: aggregatedReactions,
+                                        eventId: componentEventId,
+                                        showAll: showAllReactions)
+    }
+}