Merge commit '7621e2f8dec938cf48181c8b10afc9b01f444e68' into beta

submodules/Postbox/Sources/PeerPresencesView.swift

@@ -0,0 +1,76 @@
+import Foundation
+
+final class MutablePeerPresencesView: MutablePostboxView {
+    fileprivate let ids: Set<PeerId>
+    fileprivate var presences: [PeerId: PeerPresence] = [:]
+    
+    init(postbox: PostboxImpl, ids: Set<PeerId>) {
+        self.ids = ids
+        for id in ids {
+            if let presence = postbox.peerPresenceTable.get(id) {
+                self.presences[id] = presence
+            }
+        }
+    }
+    
+    func replay(postbox: PostboxImpl, transaction: PostboxTransaction) -> Bool {
+        var updated = false
+        if !transaction.currentUpdatedPeerPresences.isEmpty {
+            for (id, presence) in transaction.currentUpdatedPeerPresences {
+                if self.ids.contains(id) {
+                    self.presences[id] = presence
+                    updated = true
+                }
+            }
+        }
+        
+        return updated
+    }
+
+    func refreshDueToExternalTransaction(postbox: PostboxImpl) -> Bool {
+        /*var presences: [PeerId: PeerPresence] = [:]
+
+        for id in self.ids {
+            if let presence = postbox.peerPresenceTable.get(id) {
+                presences[id] = presence
+            }
+        }
+
+        var updated = false
+        if self.presences.count != presences.count {
+            updated = true
+        } else {
+            for (key, value) in self.presences {
+                if let other = presences[key] {
+                    if !other.isEqual(to: value) {
+                        updated = true
+                        break
+                    }
+                } else {
+                    updated = true
+                    break
+                }
+            }
+        }
+
+        if updated {
+            self.presences = presences
+            return true
+        } else {
+            return false
+        }*/
+        return false
+    }
+    
+    func immutableView() -> PostboxView {
+        return PeerPresencesView(self)
+    }
+}
+
+public final class PeerPresencesView: PostboxView {
+    public let presences: [PeerId: PeerPresence]
+    
+    init(_ view: MutablePeerPresencesView) {
+        self.presences = view.presences
+    }
+}