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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("UniqueDirectivesPerLocation", func(observers *Events, addError AddErrFunc) {
observers.OnDirectiveList(func(walker *Walker, directives []*ast.Directive) {
seen := map[string]bool{}
for _, dir := range directives {
if dir.Name != "repeatable" && seen[dir.Name] {
addError(
Message(`The directive "@%s" can only be used once at this location.`, dir.Name),
At(dir.Position),
)
}
seen[dir.Name] = true
}
})
})
}
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