verify, that boat is not on water on adding log entry; Fixes #625 (#697)

Reviewed-on: #697

src/model/logbook.rs

@@ -142,6 +142,7 @@ pub enum LogbookUpdateError {
     TooFast(i64, i64),
     AlreadyFinalized,
     ExternalSteeringPersonMustSteerOrShipmaster,
+    BoatAlreadyOnWater,
 }
 
 #[derive(Debug, PartialEq)]
@@ -196,6 +197,7 @@ impl From<LogbookUpdateError> for LogbookCreateError {
             LogbookUpdateError::ExternalSteeringPersonMustSteerOrShipmaster => {
                 LogbookCreateError::ExternalSteeringPersonMustSteerOrShipmaster
             }
+            LogbookUpdateError::BoatAlreadyOnWater => LogbookCreateError::BoatAlreadyOnWater,
         }
     }
 }
@@ -573,6 +575,12 @@ ORDER BY departure DESC
             return Err(LogbookUpdateError::ArrivalNotAfterDeparture);
         }
 
+        if !boat.external {
+            if boat.on_water_between(db, dep, arr).await {
+                return Err(LogbookUpdateError::BoatAlreadyOnWater);
+            };
+        }
+
         let duration_in_mins = (arr.and_utc().timestamp() - dep.and_utc().timestamp()) / 60;
         // Not possible to row < 1 min / 500 m = < 2 min / km
         let possible_distance_km = duration_in_mins / 2;