refactor and cleanup [skip ci]

submodules/Postbox/Sources/PendingPeerNotificationSettingsIndexTable.swift

@@ -0,0 +1,40 @@
+import Foundation
+
+final class PendingPeerNotificationSettingsIndexTable: Table {
+    static func tableSpec(_ id: Int32) -> ValueBoxTable {
+        return ValueBoxTable(id: id, keyType: .int64, compactValuesOnCreation: false)
+    }
+    
+    private let sharedKey = ValueBoxKey(length: 8)
+    private var updatedPeerIds: [PeerId: Bool] = [:]
+    
+    private func key(_ id: PeerId) -> ValueBoxKey {
+        self.sharedKey.setInt64(0, value: id.toInt64())
+        return self.sharedKey
+    }
+    
+    private func get(peerId: PeerId) -> Bool {
+        if let _ = self.valueBox.get(self.table, key: self.key(peerId)) {
+            return true
+        } else {
+            return false
+        }
+    }
+    
+    func getAll() -> [PeerId] {
+        var peerIds: [PeerId] = []
+        self.valueBox.scanInt64(self.table, values: { key, _ in
+            peerIds.append(PeerId(key))
+            return true
+        })
+        return peerIds
+    }
+    
+    func set(peerId: PeerId, pending: Bool) {
+        if pending {
+            self.valueBox.set(self.table, key: self.key(peerId), value: MemoryBuffer())
+        } else {
+            self.valueBox.remove(self.table, key: self.key(peerId), secure: false)
+        }
+    }
+}