feat: add traffic delay severity (#543)

* feat: adding TrafficDelaySeverity to NavigationTimeAndDistance and RemainingTimeOrDistanceChangedEvent

Author: Samo8

android/src/main/kotlin/com/google/maps/flutter/navigation/Convert.kt

@@ -380,6 +380,23 @@ object Convert {
     )
   }
 
+  /**
+   * Converts Google Navigation [TimeAndDistance] delay severity to pigeon
+   * [TrafficDelaySeverityDto].
+   *
+   * @param delaySeverity Google Navigation TimeAndDistance delay severity [Int].
+   * @return pigeon [TrafficDelaySeverityDto].
+   */
+  fun convertDelaySeverityToDto(delaySeverity: Int): TrafficDelaySeverityDto {
+    return when (delaySeverity) {
+      TimeAndDistance.DELAY_LIGHT -> TrafficDelaySeverityDto.LIGHT
+      TimeAndDistance.DELAY_MEDIUM -> TrafficDelaySeverityDto.MEDIUM
+      TimeAndDistance.DELAY_HEAVY -> TrafficDelaySeverityDto.HEAVY
+      TimeAndDistance.DELAY_NODATA -> TrafficDelaySeverityDto.NO_DATA
+      else -> TrafficDelaySeverityDto.NO_DATA
+    }
+  }
+
   /**
    * Converts Google Navigation [TimeAndDistance] to pigeon [NavigationTimeAndDistanceDto].
    *
@@ -390,6 +407,7 @@ object Convert {
     return NavigationTimeAndDistanceDto(
       timeAndDistance.seconds.toDouble(),
       timeAndDistance.meters.toDouble(),
+      convertDelaySeverityToDto(timeAndDistance.delaySeverity),
     )
   }
 

android/src/main/kotlin/com/google/maps/flutter/navigation/GoogleMapsNavigationSessionManager.kt

@@ -352,6 +352,7 @@ constructor(
             navigationSessionEventApi.onRemainingTimeOrDistanceChanged(
               timeAndDistance.seconds.toDouble(),
               timeAndDistance.meters.toDouble(),
+              Convert.convertDelaySeverityToDto(timeAndDistance.delaySeverity),
             ) {}
           }
         }