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Postbox/PeerTable.swift

@@ -0,0 +1,40 @@
+import Foundation
+
+final class PeerTable {
+    let valueBox: ValueBox
+    let tableId: Int32
+    
+    private let sharedEncoder = Encoder()
+    private let sharedKey = ValueBoxKey(length: 8)
+    private var cachedPeers: [PeerId: Peer] = [:]
+    
+    init(valueBox: ValueBox, tableId: Int32) {
+        self.valueBox = valueBox
+        self.tableId = tableId
+    }
+    
+    private func key(id: PeerId) -> ValueBoxKey {
+        self.sharedKey.setInt64(0, value: id.toInt64())
+        return self.sharedKey
+    }
+    
+    func set(peer: Peer) {
+        self.sharedEncoder.reset()
+        self.sharedEncoder.encodeRootObject(peer)
+        
+        self.valueBox.set(self.tableId, key: self.key(peer.id), value: self.sharedEncoder.readBufferNoCopy())
+    }
+    
+    func get(id: PeerId) -> Peer? {
+        if let peer = self.cachedPeers[id] {
+            return peer
+        }
+        if let value = self.valueBox.get(self.tableId, key: self.key(id)) {
+            if let peer = Decoder(buffer: value).decodeRootObject() as? Peer {
+                self.cachedPeers[id] = peer
+                return peer
+            }
+        }
+        return nil
+    }
+}