Display text selection tip in message context menu

submodules/Postbox/Sources/MessageHistoryFailedTable.swift

@@ -0,0 +1,55 @@
+import Foundation
+
+final class MessageHistoryFailedTable: Table {
+    static func tableSpec(_ id: Int32) -> ValueBoxTable {
+        return ValueBoxTable(id: id, keyType: .binary, compactValuesOnCreation: true)
+    }
+    
+    private let sharedKey = ValueBoxKey(length: 8 + 4 + 4)
+    
+    private(set) var updatedPeerIds = Set<PeerId>()
+    
+    private func key(_ id: MessageId) -> ValueBoxKey {
+        self.sharedKey.setInt64(0, value: id.peerId.toInt64())
+        self.sharedKey.setInt32(8, value: id.namespace)
+        self.sharedKey.setInt32(8 + 4, value: id.id)
+        
+        return self.sharedKey
+    }
+    
+    private func lowerBound(peerId: PeerId) -> ValueBoxKey {
+        let key = ValueBoxKey(length: 8)
+        key.setInt64(0, value: peerId.toInt64())
+        return key
+    }
+    
+    private func upperBound(peerId: PeerId) -> ValueBoxKey {
+        let key = ValueBoxKey(length: 8)
+        key.setInt64(0, value: peerId.toInt64())
+        return key.successor
+    }
+    
+    func add(_ id: MessageId) {
+        self.valueBox.set(self.table, key: self.key(id), value: MemoryBuffer())
+        self.updatedPeerIds.insert(id.peerId)
+    }
+    
+    func remove(_ id: MessageId) {
+        self.valueBox.remove(self.table, key: self.key(id), secure: false)
+        self.updatedPeerIds.insert(id.peerId)
+    }
+    
+    func contains(peerId: PeerId) -> Bool {
+        var result = false
+        self.valueBox.range(self.table, start: self.lowerBound(peerId: peerId), end: self.upperBound(peerId: peerId), keys: { _ in
+            result = true
+            return false
+        }, limit: 1)
+        return result
+    }
+    
+    override func beforeCommit() {
+        self.updatedPeerIds.removeAll()
+    }
+}
+