mirror of
https://github.com/swc-project/swc.git
synced 2024-12-23 05:32:09 +03:00
376 lines
9.4 KiB
TypeScript
376 lines
9.4 KiB
TypeScript
// Loaded from https://deno.land/x/graphql_deno@v15.0.0/lib/utilities/TypeInfo.js
|
|
|
|
|
|
import find from '../polyfills/find.js';
|
|
import { Kind } from '../language/kinds.js';
|
|
import { getVisitFn } from '../language/visitor.js';
|
|
import { isNode } from '../language/ast.js';
|
|
import { isObjectType, isInterfaceType, isEnumType, isInputObjectType, isListType, isCompositeType, isInputType, isOutputType, getNullableType, getNamedType } from '../type/definition.js';
|
|
import { SchemaMetaFieldDef, TypeMetaFieldDef, TypeNameMetaFieldDef } from '../type/introspection.js';
|
|
import { typeFromAST } from './typeFromAST.js';
|
|
/**
|
|
* TypeInfo is a utility class which, given a GraphQL schema, can keep track
|
|
* of the current field and type definitions at any point in a GraphQL document
|
|
* AST during a recursive descent by calling `enter(node)` and `leave(node)`.
|
|
*/
|
|
|
|
export class TypeInfo {
|
|
constructor(schema, // NOTE: this experimental optional second parameter is only needed in order
|
|
// to support non-spec-compliant code bases. You should never need to use it.
|
|
// It may disappear in the future.
|
|
getFieldDefFn, // Initial type may be provided in rare cases to facilitate traversals
|
|
// beginning somewhere other than documents.
|
|
initialType) {
|
|
this._schema = schema;
|
|
this._typeStack = [];
|
|
this._parentTypeStack = [];
|
|
this._inputTypeStack = [];
|
|
this._fieldDefStack = [];
|
|
this._defaultValueStack = [];
|
|
this._directive = null;
|
|
this._argument = null;
|
|
this._enumValue = null;
|
|
this._getFieldDef = getFieldDefFn ?? getFieldDef;
|
|
|
|
if (initialType) {
|
|
if (isInputType(initialType)) {
|
|
this._inputTypeStack.push(initialType);
|
|
}
|
|
|
|
if (isCompositeType(initialType)) {
|
|
this._parentTypeStack.push(initialType);
|
|
}
|
|
|
|
if (isOutputType(initialType)) {
|
|
this._typeStack.push(initialType);
|
|
}
|
|
}
|
|
}
|
|
|
|
getType() {
|
|
if (this._typeStack.length > 0) {
|
|
return this._typeStack[this._typeStack.length - 1];
|
|
}
|
|
}
|
|
|
|
getParentType() {
|
|
if (this._parentTypeStack.length > 0) {
|
|
return this._parentTypeStack[this._parentTypeStack.length - 1];
|
|
}
|
|
}
|
|
|
|
getInputType() {
|
|
if (this._inputTypeStack.length > 0) {
|
|
return this._inputTypeStack[this._inputTypeStack.length - 1];
|
|
}
|
|
}
|
|
|
|
getParentInputType() {
|
|
if (this._inputTypeStack.length > 1) {
|
|
return this._inputTypeStack[this._inputTypeStack.length - 2];
|
|
}
|
|
}
|
|
|
|
getFieldDef() {
|
|
if (this._fieldDefStack.length > 0) {
|
|
return this._fieldDefStack[this._fieldDefStack.length - 1];
|
|
}
|
|
}
|
|
|
|
getDefaultValue() {
|
|
if (this._defaultValueStack.length > 0) {
|
|
return this._defaultValueStack[this._defaultValueStack.length - 1];
|
|
}
|
|
}
|
|
|
|
getDirective() {
|
|
return this._directive;
|
|
}
|
|
|
|
getArgument() {
|
|
return this._argument;
|
|
}
|
|
|
|
getEnumValue() {
|
|
return this._enumValue;
|
|
}
|
|
|
|
enter(node) {
|
|
const schema = this._schema; // Note: many of the types below are explicitly typed as "mixed" to drop
|
|
// any assumptions of a valid schema to ensure runtime types are properly
|
|
// checked before continuing since TypeInfo is used as part of validation
|
|
// which occurs before guarantees of schema and document validity.
|
|
|
|
switch (node.kind) {
|
|
case Kind.SELECTION_SET:
|
|
{
|
|
const namedType = getNamedType(this.getType());
|
|
|
|
this._parentTypeStack.push(isCompositeType(namedType) ? namedType : undefined);
|
|
|
|
break;
|
|
}
|
|
|
|
case Kind.FIELD:
|
|
{
|
|
const parentType = this.getParentType();
|
|
let fieldDef;
|
|
let fieldType;
|
|
|
|
if (parentType) {
|
|
fieldDef = this._getFieldDef(schema, parentType, node);
|
|
|
|
if (fieldDef) {
|
|
fieldType = fieldDef.type;
|
|
}
|
|
}
|
|
|
|
this._fieldDefStack.push(fieldDef);
|
|
|
|
this._typeStack.push(isOutputType(fieldType) ? fieldType : undefined);
|
|
|
|
break;
|
|
}
|
|
|
|
case Kind.DIRECTIVE:
|
|
this._directive = schema.getDirective(node.name.value);
|
|
break;
|
|
|
|
case Kind.OPERATION_DEFINITION:
|
|
{
|
|
let type;
|
|
|
|
switch (node.operation) {
|
|
case 'query':
|
|
type = schema.getQueryType();
|
|
break;
|
|
|
|
case 'mutation':
|
|
type = schema.getMutationType();
|
|
break;
|
|
|
|
case 'subscription':
|
|
type = schema.getSubscriptionType();
|
|
break;
|
|
}
|
|
|
|
this._typeStack.push(isObjectType(type) ? type : undefined);
|
|
|
|
break;
|
|
}
|
|
|
|
case Kind.INLINE_FRAGMENT:
|
|
case Kind.FRAGMENT_DEFINITION:
|
|
{
|
|
const typeConditionAST = node.typeCondition;
|
|
const outputType = typeConditionAST ? typeFromAST(schema, typeConditionAST) : getNamedType(this.getType());
|
|
|
|
this._typeStack.push(isOutputType(outputType) ? outputType : undefined);
|
|
|
|
break;
|
|
}
|
|
|
|
case Kind.VARIABLE_DEFINITION:
|
|
{
|
|
const inputType = typeFromAST(schema, node.type);
|
|
|
|
this._inputTypeStack.push(isInputType(inputType) ? inputType : undefined);
|
|
|
|
break;
|
|
}
|
|
|
|
case Kind.ARGUMENT:
|
|
{
|
|
let argDef;
|
|
let argType;
|
|
const fieldOrDirective = this.getDirective() ?? this.getFieldDef();
|
|
|
|
if (fieldOrDirective) {
|
|
argDef = find(fieldOrDirective.args, arg => arg.name === node.name.value);
|
|
|
|
if (argDef) {
|
|
argType = argDef.type;
|
|
}
|
|
}
|
|
|
|
this._argument = argDef;
|
|
|
|
this._defaultValueStack.push(argDef ? argDef.defaultValue : undefined);
|
|
|
|
this._inputTypeStack.push(isInputType(argType) ? argType : undefined);
|
|
|
|
break;
|
|
}
|
|
|
|
case Kind.LIST:
|
|
{
|
|
const listType = getNullableType(this.getInputType());
|
|
const itemType = isListType(listType) ? listType.ofType : listType; // List positions never have a default value.
|
|
|
|
this._defaultValueStack.push(undefined);
|
|
|
|
this._inputTypeStack.push(isInputType(itemType) ? itemType : undefined);
|
|
|
|
break;
|
|
}
|
|
|
|
case Kind.OBJECT_FIELD:
|
|
{
|
|
const objectType = getNamedType(this.getInputType());
|
|
let inputFieldType;
|
|
let inputField;
|
|
|
|
if (isInputObjectType(objectType)) {
|
|
inputField = objectType.getFields()[node.name.value];
|
|
|
|
if (inputField) {
|
|
inputFieldType = inputField.type;
|
|
}
|
|
}
|
|
|
|
this._defaultValueStack.push(inputField ? inputField.defaultValue : undefined);
|
|
|
|
this._inputTypeStack.push(isInputType(inputFieldType) ? inputFieldType : undefined);
|
|
|
|
break;
|
|
}
|
|
|
|
case Kind.ENUM:
|
|
{
|
|
const enumType = getNamedType(this.getInputType());
|
|
let enumValue;
|
|
|
|
if (isEnumType(enumType)) {
|
|
enumValue = enumType.getValue(node.value);
|
|
}
|
|
|
|
this._enumValue = enumValue;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
leave(node) {
|
|
switch (node.kind) {
|
|
case Kind.SELECTION_SET:
|
|
this._parentTypeStack.pop();
|
|
|
|
break;
|
|
|
|
case Kind.FIELD:
|
|
this._fieldDefStack.pop();
|
|
|
|
this._typeStack.pop();
|
|
|
|
break;
|
|
|
|
case Kind.DIRECTIVE:
|
|
this._directive = null;
|
|
break;
|
|
|
|
case Kind.OPERATION_DEFINITION:
|
|
case Kind.INLINE_FRAGMENT:
|
|
case Kind.FRAGMENT_DEFINITION:
|
|
this._typeStack.pop();
|
|
|
|
break;
|
|
|
|
case Kind.VARIABLE_DEFINITION:
|
|
this._inputTypeStack.pop();
|
|
|
|
break;
|
|
|
|
case Kind.ARGUMENT:
|
|
this._argument = null;
|
|
|
|
this._defaultValueStack.pop();
|
|
|
|
this._inputTypeStack.pop();
|
|
|
|
break;
|
|
|
|
case Kind.LIST:
|
|
case Kind.OBJECT_FIELD:
|
|
this._defaultValueStack.pop();
|
|
|
|
this._inputTypeStack.pop();
|
|
|
|
break;
|
|
|
|
case Kind.ENUM:
|
|
this._enumValue = null;
|
|
break;
|
|
}
|
|
}
|
|
|
|
}
|
|
/**
|
|
* Not exactly the same as the executor's definition of getFieldDef, in this
|
|
* statically evaluated environment we do not always have an Object type,
|
|
* and need to handle Interface and Union types.
|
|
*/
|
|
|
|
function getFieldDef(schema, parentType, fieldNode) {
|
|
const name = fieldNode.name.value;
|
|
|
|
if (name === SchemaMetaFieldDef.name && schema.getQueryType() === parentType) {
|
|
return SchemaMetaFieldDef;
|
|
}
|
|
|
|
if (name === TypeMetaFieldDef.name && schema.getQueryType() === parentType) {
|
|
return TypeMetaFieldDef;
|
|
}
|
|
|
|
if (name === TypeNameMetaFieldDef.name && isCompositeType(parentType)) {
|
|
return TypeNameMetaFieldDef;
|
|
}
|
|
|
|
if (isObjectType(parentType) || isInterfaceType(parentType)) {
|
|
return parentType.getFields()[name];
|
|
}
|
|
}
|
|
/**
|
|
* Creates a new visitor instance which maintains a provided TypeInfo instance
|
|
* along with visiting visitor.
|
|
*/
|
|
|
|
|
|
export function visitWithTypeInfo(typeInfo, visitor) {
|
|
return {
|
|
enter(node) {
|
|
typeInfo.enter(node);
|
|
const fn = getVisitFn(visitor, node.kind,
|
|
/* isLeaving */
|
|
false);
|
|
|
|
if (fn) {
|
|
const result = fn.apply(visitor, arguments);
|
|
|
|
if (result !== undefined) {
|
|
typeInfo.leave(node);
|
|
|
|
if (isNode(result)) {
|
|
typeInfo.enter(result);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
},
|
|
|
|
leave(node) {
|
|
const fn = getVisitFn(visitor, node.kind,
|
|
/* isLeaving */
|
|
true);
|
|
let result;
|
|
|
|
if (fn) {
|
|
result = fn.apply(visitor, arguments);
|
|
}
|
|
|
|
typeInfo.leave(node);
|
|
return result;
|
|
}
|
|
|
|
};
|
|
} |