fix duplicating models

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## [Unreleased]
 
+- Fix: Duplicate models in the field of the flight record form. Fixed. Plus added sorting for models and regs.
 - Fix: The ICAO code was not properly set for the airports from ourairports.com source. Changed the algorithm to assign the codes.
 
 ## [2.29.1] - 15.01.2024

cmd/web/helpers.go

@@ -80,10 +80,17 @@ func (app *application) lastRegsAndModels() (aircraftRegs []string, aircraftMode
 	}
 
 	for key, val := range lastAircrafts {
-		aircraftRegs = append(aircraftRegs, key)
-		aircraftModels = append(aircraftModels, val)
+		if !slices.Contains(aircraftRegs, key) {
+			aircraftRegs = append(aircraftRegs, key)
+		}
+		if !slices.Contains(aircraftModels, val) {
+			aircraftModels = append(aircraftModels, val)
+		}
 	}
 
+	slices.Sort(aircraftRegs)
+	slices.Sort(aircraftModels)
+
 	return aircraftRegs, aircraftModels
 }