Merge commit '7621e2f8dec938cf48181c8b10afc9b01f444e68' into beta

submodules/Postbox/Sources/MultiplePeersView.swift

@@ -0,0 +1,52 @@
+import Foundation
+
+final class MutableMultiplePeersView {
+    let peerIds: Set<PeerId>
+    
+    var peers: [PeerId: Peer] = [:]
+    var presences: [PeerId: PeerPresence] = [:]
+    
+    init(peerIds: [PeerId], getPeer: (PeerId) -> Peer?, getPeerPresence: (PeerId) -> PeerPresence?) {
+        self.peerIds = Set(peerIds)
+        
+        for peerId in self.peerIds {
+            if let peer = getPeer(peerId) {
+                self.peers[peerId] = peer
+            }
+            if let presence = getPeerPresence(peerId) {
+                self.presences[peerId] = presence
+            }
+        }
+    }
+    
+    func replay(updatedPeers: [PeerId: Peer], updatedPeerPresences: [PeerId: PeerPresence]) -> Bool {
+        if updatedPeers.isEmpty && updatedPeerPresences.isEmpty {
+            return false
+        }
+        
+        var updated = false
+        
+        for peerId in self.peerIds {
+            if let peer = updatedPeers[peerId] {
+                self.peers[peerId] = peer
+                updated = true
+            }
+            if let presence = updatedPeerPresences[peerId] {
+                self.presences[peerId] = presence
+                updated = true
+            }
+        }
+        
+        return updated
+    }
+}
+
+public final class MultiplePeersView {
+    public let peers: [PeerId: Peer]
+    public let presences: [PeerId: PeerPresence]
+    
+    init(_ view: MutableMultiplePeersView) {
+        self.peers = view.peers
+        self.presences = view.presences
+    }
+}