Merge commit '7621e2f8dec938cf48181c8b10afc9b01f444e68' into beta

submodules/TelegramCore/Sources/State/CachedSentMediaReferences.swift

@@ -0,0 +1,54 @@
+import Foundation
+import Postbox
+import SwiftSignalKit
+
+enum CachedSentMediaReferenceKey {
+    case image(hash: Data)
+    case file(hash: Data)
+    
+    var key: ValueBoxKey {
+        switch self {
+            case let .image(hash):
+                let result = ValueBoxKey(length: 1 + hash.count)
+                result.setUInt8(0, value: 0)
+                hash.withUnsafeBytes { rawBytes -> Void in
+                    let bytes = rawBytes.baseAddress!.assumingMemoryBound(to: Int8.self)
+                    memcpy(result.memory.advanced(by: 1), bytes, hash.count)
+                }
+                return result
+            case let .file(hash):
+                let result = ValueBoxKey(length: 1 + hash.count)
+                result.setUInt8(0, value: 1)
+                hash.withUnsafeBytes { rawBytes -> Void in
+                    let bytes = rawBytes.baseAddress!.assumingMemoryBound(to: Int8.self)
+                    memcpy(result.memory.advanced(by: 1), bytes, hash.count)
+                }
+                return result
+        }
+    }
+}
+
+private struct CachedMediaReferenceEntry: Codable {
+    var data: Data
+}
+
+func cachedSentMediaReference(postbox: Postbox, key: CachedSentMediaReferenceKey) -> Signal<Media?, NoError> {
+    return postbox.transaction { transaction -> Media? in
+        guard let entry = transaction.retrieveItemCacheEntry(id: ItemCacheEntryId(collectionId: Namespaces.CachedItemCollection.cachedSentMediaReferences, key: key.key))?.get(CachedMediaReferenceEntry.self) else {
+            return nil
+        }
+        
+        return PostboxDecoder(buffer: MemoryBuffer(data: entry.data)).decodeRootObject() as? Media
+    }
+}
+
+func storeCachedSentMediaReference(transaction: Transaction, key: CachedSentMediaReferenceKey, media: Media) {
+    let encoder = PostboxEncoder()
+    encoder.encodeRootObject(media)
+    let mediaData = encoder.makeData()
+    
+    guard let entry = CodableEntry(CachedMediaReferenceEntry(data: mediaData)) else {
+        return
+    }
+    transaction.putItemCacheEntry(id: ItemCacheEntryId(collectionId: Namespaces.CachedItemCollection.cachedSentMediaReferences, key: key.key), entry: entry)
+}