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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("NoUnusedVariables", func(observers *Events, addError AddErrFunc) {
observers.OnOperation(func(walker *Walker, operation *ast.OperationDefinition) {
for _, varDef := range operation.VariableDefinitions {
if varDef.Used {
continue
}
if operation.Name != "" {
addError(
Message(`Variable "$%s" is never used in operation "%s".`, varDef.Variable, operation.Name),
At(varDef.Position),
)
} else {
addError(
Message(`Variable "$%s" is never used.`, varDef.Variable),
At(varDef.Position),
)
}
}
})
})
}
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