1 files changed, 44 insertions, 0 deletions
diff --git a/vendor/github.com/vektah/gqlparser/validator/validator.go b/vendor/github.com/vektah/gqlparser/validator/validator.go
new file mode 100644
index 00000000..bbacec6f
--- /dev/null
+++ b/vendor/github.com/vektah/gqlparser/validator/validator.go
@@ -0,0 +1,44 @@
+package validator
+
+import (
+	. "github.com/vektah/gqlparser/ast"
+	"github.com/vektah/gqlparser/gqlerror"
+)
+
+type AddErrFunc func(options ...ErrorOption)
+
+type ruleFunc func(observers *Events, addError AddErrFunc)
+
+type rule struct {
+	name string
+	rule ruleFunc
+}
+
+var rules []rule
+
+// addRule to rule set.
+// f is called once each time `Validate` is executed.
+func AddRule(name string, f ruleFunc) {
+	rules = append(rules, rule{name: name, rule: f})
+}
+
+func Validate(schema *Schema, doc *QueryDocument) gqlerror.List {
+	var errs gqlerror.List
+
+	observers := &Events{}
+	for i := range rules {
+		rule := rules[i]
+		rule.rule(observers, func(options ...ErrorOption) {
+			err := &gqlerror.Error{
+				Rule: rule.name,
+			}
+			for _, o := range options {
+				o(err)
+			}
+			errs = append(errs, err)
+		})
+	}
+
+	Walk(schema, doc, observers)
+	return errs
+}