GLEGram 12.5 — Initial public release

Based on Swiftgram 12.5 (Telegram iOS 12.5).
All GLEGram features ported and organized in GLEGram/ folder.

Features: Ghost Mode, Saved Deleted Messages, Content Protection Bypass,
Font Replacement, Fake Profile, Chat Export, Plugin System, and more.

See CHANGELOG_12.5.md for full details.

submodules/TelegramUI/Sources/ChatLinkPreview.swift

@@ -0,0 +1,33 @@
+import Foundation
+import Postbox
+import TelegramCore
+import SwiftSignalKit
+import TelegramNotices
+
+final class InteractiveChatLinkPreviewsResult {
+    let f: (Bool) -> Void
+    
+    init(_ f: @escaping (Bool) -> Void) {
+        self.f = f
+    }
+}
+
+func interactiveChatLinkPreviewsEnabled(accountManager: AccountManager<TelegramAccountManagerTypes>, displayAlert: @escaping (InteractiveChatLinkPreviewsResult) -> Void) -> Signal<Bool, NoError> {
+    return ApplicationSpecificNotice.getSecretChatLinkPreviews(accountManager: accountManager)
+    |> mapToSignal { value -> Signal<Bool, NoError> in
+        if let value = value {
+            return .single(value)
+        } else {
+            return Signal { subscriber in
+                Queue.mainQueue().async {
+                    displayAlert(InteractiveChatLinkPreviewsResult({ result in
+                        let _ = ApplicationSpecificNotice.setSecretChatLinkPreviews(accountManager: accountManager, value: result).startStandalone()
+                        subscriber.putNext(result)
+                        subscriber.putCompletion()
+                    }))
+                }
+                return EmptyDisposable
+            }
+        }
+    }
+}