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ast_directive.go
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/
ast_directive.go
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package ast
import (
"bytes"
"io"
"github.com/wundergraph/graphql-go-tools/pkg/lexer/literal"
"github.com/wundergraph/graphql-go-tools/pkg/lexer/position"
)
type DirectiveList struct {
Refs []int
}
type Directive struct {
At position.Position // @
Name ByteSliceReference // e.g. include
HasArguments bool
Arguments ArgumentList // e.g. (if: true)
}
func (l *DirectiveList) HasDirectiveByName(document *Document, name string) bool {
for i := range l.Refs {
if document.DirectiveNameString(l.Refs[i]) == name {
return true
}
}
return false
}
func (l *DirectiveList) RemoveDirectiveByName(document *Document, name string) {
for i := range l.Refs {
if document.DirectiveNameString(l.Refs[i]) == name {
if i < len(l.Refs)-1 {
l.Refs = append(l.Refs[:i], l.Refs[i+1:]...)
} else {
l.Refs = l.Refs[:i]
}
return
}
}
}
func (d *Document) CopyDirective(ref int) int {
var arguments ArgumentList
if d.Directives[ref].HasArguments {
arguments = d.CopyArgumentList(d.Directives[ref].Arguments)
}
return d.AddDirective(Directive{
Name: d.copyByteSliceReference(d.Directives[ref].Name),
HasArguments: d.Directives[ref].HasArguments,
Arguments: arguments,
})
}
func (d *Document) CopyDirectiveList(list DirectiveList) DirectiveList {
refs := d.NewEmptyRefs()
for _, r := range list.Refs {
refs = append(refs, d.CopyDirective(r))
}
return DirectiveList{Refs: refs}
}
func (d *Document) PrintDirective(ref int, w io.Writer) error {
_, err := w.Write(literal.AT)
if err != nil {
return err
}
_, err = w.Write(d.Input.ByteSlice(d.Directives[ref].Name))
if err != nil {
return err
}
if d.Directives[ref].HasArguments {
err = d.PrintArguments(d.Directives[ref].Arguments.Refs, w)
}
return err
}
func (d *Document) DirectiveName(ref int) ByteSliceReference {
return d.Directives[ref].Name
}
func (d *Document) DirectiveNameBytes(ref int) ByteSlice {
return d.Input.ByteSlice(d.Directives[ref].Name)
}
func (d *Document) DirectiveNameString(ref int) string {
return d.Input.ByteSliceString(d.Directives[ref].Name)
}
func (d *Document) DirectiveIsFirst(directive int, ancestor Node) bool {
directives := d.NodeDirectives(ancestor)
return len(directives) != 0 && directives[0] == directive
}
func (d *Document) DirectiveIsLast(directive int, ancestor Node) bool {
directives := d.NodeDirectives(ancestor)
return len(directives) != 0 && directives[len(directives)-1] == directive
}
func (d *Document) DirectiveArgumentSet(ref int) []int {
return d.Directives[ref].Arguments.Refs
}
func (d *Document) DirectiveArgumentValueByName(ref int, name ByteSlice) (Value, bool) {
for i := 0; i < len(d.Directives[ref].Arguments.Refs); i++ {
arg := d.Directives[ref].Arguments.Refs[i]
if bytes.Equal(d.ArgumentNameBytes(arg), name) {
return d.ArgumentValue(arg), true
}
}
return Value{}, false
}
func (d *Document) DirectivesAreEqual(left, right int) bool {
return d.Input.ByteSliceReferenceContentEquals(d.DirectiveName(left), d.DirectiveName(right)) &&
d.ArgumentSetsAreEquals(d.DirectiveArgumentSet(left), d.DirectiveArgumentSet(right))
}
func (d *Document) DirectiveSetsAreEqual(left, right []int) bool {
if len(left) != len(right) {
return false
}
for i := 0; i < len(left); i++ {
leftDirective, rightDirective := left[i], right[i]
if !d.DirectivesAreEqual(leftDirective, rightDirective) {
return false
}
}
return true
}
func (d *Document) AddDirective(directive Directive) (ref int) {
d.Directives = append(d.Directives, directive)
return len(d.Directives) - 1
}
func (d *Document) ImportDirective(name string, argRefs []int) (ref int) {
directive := Directive{
Name: d.Input.AppendInputString(name),
HasArguments: len(argRefs) > 0,
Arguments: ArgumentList{
Refs: argRefs,
},
}
return d.AddDirective(directive)
}
func (d *Document) AddDirectiveToNode(directiveRef int, node Node) bool {
switch node.Kind {
case NodeKindField:
d.Fields[node.Ref].Directives.Refs = append(d.Fields[node.Ref].Directives.Refs, directiveRef)
d.Fields[node.Ref].HasDirectives = true
return true
case NodeKindVariableDefinition:
d.VariableDefinitions[node.Ref].Directives.Refs = append(d.VariableDefinitions[node.Ref].Directives.Refs, directiveRef)
d.VariableDefinitions[node.Ref].HasDirectives = true
return true
case NodeKindOperationDefinition:
d.OperationDefinitions[node.Ref].Directives.Refs = append(d.OperationDefinitions[node.Ref].Directives.Refs, directiveRef)
d.OperationDefinitions[node.Ref].HasDirectives = true
return true
case NodeKindInputValueDefinition:
d.InputValueDefinitions[node.Ref].Directives.Refs = append(d.InputValueDefinitions[node.Ref].Directives.Refs, directiveRef)
d.InputValueDefinitions[node.Ref].HasDirectives = true
return true
case NodeKindInlineFragment:
d.InlineFragments[node.Ref].Directives.Refs = append(d.InlineFragments[node.Ref].Directives.Refs, directiveRef)
d.InlineFragments[node.Ref].HasDirectives = true
return true
case NodeKindFragmentSpread:
d.FragmentSpreads[node.Ref].Directives.Refs = append(d.FragmentSpreads[node.Ref].Directives.Refs, directiveRef)
d.FragmentSpreads[node.Ref].HasDirectives = true
return true
case NodeKindFragmentDefinition:
d.FragmentDefinitions[node.Ref].Directives.Refs = append(d.FragmentDefinitions[node.Ref].Directives.Refs, directiveRef)
d.FragmentDefinitions[node.Ref].HasDirectives = true
return true
default:
return false
}
}
func (d *Document) DirectiveIsAllowedOnNodeKind(directiveName string, kind NodeKind, operationType OperationType) bool {
definition, ok := d.DirectiveDefinitionByName(directiveName)
if !ok {
return false
}
switch kind {
case NodeKindOperationDefinition:
switch operationType {
case OperationTypeQuery:
return d.DirectiveDefinitions[definition].DirectiveLocations.Get(ExecutableDirectiveLocationQuery)
case OperationTypeMutation:
return d.DirectiveDefinitions[definition].DirectiveLocations.Get(ExecutableDirectiveLocationMutation)
case OperationTypeSubscription:
return d.DirectiveDefinitions[definition].DirectiveLocations.Get(ExecutableDirectiveLocationSubscription)
}
case NodeKindField:
return d.DirectiveDefinitions[definition].DirectiveLocations.Get(ExecutableDirectiveLocationField)
case NodeKindFragmentDefinition:
return d.DirectiveDefinitions[definition].DirectiveLocations.Get(ExecutableDirectiveLocationFragmentDefinition)
case NodeKindFragmentSpread:
return d.DirectiveDefinitions[definition].DirectiveLocations.Get(ExecutableDirectiveLocationFragmentSpread)
case NodeKindInlineFragment:
return d.DirectiveDefinitions[definition].DirectiveLocations.Get(ExecutableDirectiveLocationInlineFragment)
case NodeKindVariableDefinition:
return d.DirectiveDefinitions[definition].DirectiveLocations.Get(ExecutableDirectiveLocationVariableDefinition)
}
return false
}