Applicator

Package applicator provides an interface to run functions based on struct tags

For example, if you accept strings over an API endpoint, you might want to trim all strings when receiving them. Additionally, you want to lowercase the Username field.

type MethodArgs struct {
    Username string `apply:"trim,lower"`
    Name     string `apply:"trim"`
}

Once you have an instance of MethodArgs, you can call applicator.Apply() to apply the functions for each field.

a := MethodArgs{"myusername "}
if err := applicator.Apply(&a); err != nil {
    // error
}

Builtin functions

trim
        Calls strings.TrimSpace on the string

lower
        Calls strings.ToLower on the string

fillNil
        Ensures that the field is not nil by filling it with the default value