Replace Optional{Int,Int64,Float64} with a generic function OptionalNumber()

internal/model/model.go

@@ -3,34 +3,20 @@
 
 package model // import "miniflux.app/v2/internal/model"
 
-// OptionalString populates an optional string field.
+type Number interface {
+	int | int64 | float64
+}
+
+func OptionalNumber[T Number](value T) *T {
+	if value > 0 {
+		return &value
+	}
+	return nil
+}
+
 func OptionalString(value string) *string {
 	if value != "" {
 		return &value
 	}
 	return nil
 }
-
-// OptionalInt populates an optional int field.
-func OptionalInt(value int) *int {
-	if value > 0 {
-		return &value
-	}
-	return nil
-}
-
-// OptionalInt64 populates an optional int64 field.
-func OptionalInt64(value int64) *int64 {
-	if value > 0 {
-		return &value
-	}
-	return nil
-}
-
-// OptionalFloat populates an optional float64 field.
-func OptionalFloat(value float64) *float64 {
-	if value > 0 {
-		return &value
-	}
-	return nil
-}