/
directives.ts
126 lines (112 loc) 路 3.07 KB
/
directives.ts
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import {
GraphQLDirective,
DirectiveLocation,
GraphQLNonNull,
GraphQLString,
GraphQLNamedType,
isInputObjectType,
GraphQLInputObjectType,
DirectiveNode,
ScalarTypeDefinitionNode,
ObjectTypeDefinitionNode,
InterfaceTypeDefinitionNode,
UnionTypeDefinitionNode,
EnumTypeDefinitionNode,
ScalarTypeExtensionNode,
ObjectTypeExtensionNode,
InterfaceTypeExtensionNode,
UnionTypeExtensionNode,
EnumTypeExtensionNode,
GraphQLField,
FieldDefinitionNode,
} from 'graphql';
export const KeyDirective = new GraphQLDirective({
name: 'key',
locations: [DirectiveLocation.OBJECT, DirectiveLocation.INTERFACE],
args: {
fields: {
type: new GraphQLNonNull(GraphQLString),
},
},
});
export const ExtendsDirective = new GraphQLDirective({
name: 'extends',
locations: [DirectiveLocation.OBJECT, DirectiveLocation.INTERFACE],
});
export const ExternalDirective = new GraphQLDirective({
name: 'external',
locations: [DirectiveLocation.OBJECT, DirectiveLocation.FIELD_DEFINITION],
});
export const RequiresDirective = new GraphQLDirective({
name: 'requires',
locations: [DirectiveLocation.FIELD_DEFINITION],
args: {
fields: {
type: new GraphQLNonNull(GraphQLString),
},
},
});
export const ProvidesDirective = new GraphQLDirective({
name: 'provides',
locations: [DirectiveLocation.FIELD_DEFINITION],
args: {
fields: {
type: new GraphQLNonNull(GraphQLString),
},
},
});
export const federationDirectives = [
KeyDirective,
ExtendsDirective,
ExternalDirective,
RequiresDirective,
ProvidesDirective,
];
export default federationDirectives;
export type ASTNodeWithDirectives =
| ScalarTypeDefinitionNode
| ObjectTypeDefinitionNode
| InterfaceTypeDefinitionNode
| UnionTypeDefinitionNode
| EnumTypeDefinitionNode
| ScalarTypeExtensionNode
| ObjectTypeExtensionNode
| InterfaceTypeExtensionNode
| UnionTypeExtensionNode
| EnumTypeExtensionNode
| FieldDefinitionNode;
// | GraphQLField<any, any>
export type GraphQLNamedTypeWithDirectives = Exclude<
GraphQLNamedType,
GraphQLInputObjectType
>;
function hasDirectives(
node: ASTNodeWithDirectives,
): node is ASTNodeWithDirectives & {
directives: ReadonlyArray<DirectiveNode>;
} {
return Boolean('directives' in node && node.directives);
}
export function gatherDirectives(
type: GraphQLNamedTypeWithDirectives | GraphQLField<any, any>,
): DirectiveNode[] {
let directives: DirectiveNode[] = [];
if ('extensionASTNodes' in type && type.extensionASTNodes) {
for (const node of type.extensionASTNodes) {
if (hasDirectives(node)) {
directives = directives.concat(node.directives);
}
}
}
if (type.astNode && hasDirectives(type.astNode))
directives = directives.concat(type.astNode.directives);
return directives;
}
export function typeIncludesDirective(
type: GraphQLNamedType,
directiveName: string,
): boolean {
if (isInputObjectType(type)) return false;
const directives = gatherDirectives(type as GraphQLNamedTypeWithDirectives);
return directives.some(directive => directive.name.value === directiveName);
}