@nestjs/graphql
Version:
Nest - modern, fast, powerful node.js web framework (@graphql)
65 lines (64 loc) • 2.55 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.reflectTypeFromMetadata = void 0;
const lodash_1 = require("lodash");
const undefined_type_error_1 = require("../schema-builder/errors/undefined-type.error");
const NOT_ALLOWED_TYPES = [Promise, Array, Object, Function];
function reflectTypeFromMetadata(reflectOptions) {
const { metadataKey, prototype, propertyKey, explicitTypeFn, typeOptions = {}, index, } = reflectOptions;
const options = { ...typeOptions };
const reflectedType = Reflect.getMetadata(metadataKey, prototype, propertyKey);
const implicitType = extractTypeIfArray(metadataKey, reflectedType, index);
const isNotAllowed = implicitType && NOT_ALLOWED_TYPES.includes(implicitType);
const hasNoImplicitNorExplicitType = !implicitType && !explicitTypeFn;
const hasNoExplicitAndImplicitIsNotAllowed = !explicitTypeFn && (!implicitType || isNotAllowed);
if (hasNoExplicitAndImplicitIsNotAllowed || hasNoImplicitNorExplicitType) {
if (!reflectOptions.ignoreOnUndefinedType) {
throw new undefined_type_error_1.UndefinedTypeError((0, lodash_1.get)(prototype, 'constructor.name'), propertyKey, index);
}
return {
options,
};
}
if (explicitTypeFn) {
return {
typeFn: createWrappedExplicitTypeFn(explicitTypeFn, options),
options,
};
}
return {
typeFn: () => implicitType,
options: implicitType === Array
? {
...options,
isArray: true,
arrayDepth: 1,
}
: options,
};
}
exports.reflectTypeFromMetadata = reflectTypeFromMetadata;
function extractTypeIfArray(metadataKey, reflectedType, index) {
if (metadataKey === 'design:paramtypes') {
return reflectedType[index];
}
return reflectedType;
}
function getTypeReferenceAndArrayDepth([typeOrArray], depth = 1) {
if (!Array.isArray(typeOrArray)) {
return { depth, typeRef: typeOrArray };
}
return getTypeReferenceAndArrayDepth(typeOrArray, depth + 1);
}
function createWrappedExplicitTypeFn(explicitTypeFn, options) {
return () => {
const explicitTypeRef = explicitTypeFn();
if (Array.isArray(explicitTypeRef)) {
const { depth, typeRef } = getTypeReferenceAndArrayDepth(explicitTypeRef);
options.isArray = true;
options.arrayDepth = depth;
return typeRef;
}
return explicitTypeRef;
};
}