Merge commit '7621e2f8dec938cf48181c8b10afc9b01f444e68' into beta

submodules/TelegramStringFormatting/Sources/StringForDuration.swift

@@ -0,0 +1,18 @@
+import Foundation
+
+public func stringForDuration(_ duration: Int32, position: Int32? = nil) -> String {
+    var duration = duration
+    if let position = position {
+        duration = max(0, duration - position)
+    }
+    let hours = duration / 3600
+    let minutes = duration / 60 % 60
+    let seconds = duration % 60
+    let durationString: String
+    if hours > 0 {
+        durationString = String(format: "%d:%02d:%02d", hours, minutes, seconds)
+    } else {
+        durationString = String(format: "%d:%02d", minutes, seconds)
+    }
+    return durationString
+}