Merge pull request #522 from Rexios80/feature/resume-session

[audio_streamer] Resume audio session after interruption

Author: hoffmatteo

packages/audio_streamer/ios/Classes/SwiftAudioStreamerPlugin.swift

@@ -38,17 +38,38 @@ public class SwiftAudioStreamerPlugin: NSObject, FlutterPlugin, FlutterStreamHan
       object: nil)
   }
 
-  @objc func handleInterruption(notification: Notification) {
-    // If no eventSink to emit events to, do nothing (wait)
-    if eventSink == nil {
-      return
+   @objc func handleInterruption(notification: Notification) {
+        // If no eventSink to emit events to, do nothing (wait)
+        if eventSink == nil {
+            return
+        }
+
+        guard let userInfo = notification.userInfo,
+              let typeValue = userInfo[AVAudioSessionInterruptionTypeKey] as? UInt,
+              let type = AVAudioSession.InterruptionType(rawValue: typeValue)
+        else {
+            return
+        }
+
+        switch type {
+        case .began: ()
+        case .ended:
+            // An interruption ended. Resume playback, if appropriate.
+
+            guard let optionsValue = userInfo[AVAudioSessionInterruptionOptionKey] as? UInt else { return }
+            let options = AVAudioSession.InterruptionOptions(rawValue: optionsValue)
+            if options.contains(.shouldResume) {
+                startRecording()
+            }
+
+        default: 
+            eventSink!(
+              FlutterError(
+                code: "100", message: "Recording was interrupted",
+                details: "Another process interrupted recording."))
+        }
     }
-    // To be implemented.
-    eventSink!(
-      FlutterError(
-        code: "100", message: "Recording was interrupted",
-        details: "Another process interrupted recording."))
-  }
+
 
   // Handle stream emitting (Swift => Flutter)
   private func emitValues(values: [Float]) {