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package validator
import (
"github.com/vektah/gqlparser/v2/ast"
//nolint:revive // Validator rules each use dot imports for convenience.
. "github.com/vektah/gqlparser/v2/validator"
)
func init() {
AddRule("UniqueArgumentNames", func(observers *Events, addError AddErrFunc) {
observers.OnField(func(walker *Walker, field *ast.Field) {
checkUniqueArgs(field.Arguments, addError)
})
observers.OnDirective(func(walker *Walker, directive *ast.Directive) {
checkUniqueArgs(directive.Arguments, addError)
})
})
}
func checkUniqueArgs(args ast.ArgumentList, addError AddErrFunc) {
knownArgNames := map[string]int{}
for _, arg := range args {
if knownArgNames[arg.Name] == 1 {
addError(
Message(`There can be only one argument named "%s".`, arg.Name),
At(arg.Position),
)
}
knownArgNames[arg.Name]++
}
}
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