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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Reflector = void 0;
const common_1 = require("@nestjs/common");
const shared_utils_1 = require("@nestjs/common/utils/shared.utils");
const uid_1 = require("uid");
/**
* Helper class providing Nest reflection capabilities.
*
* @see [Reflection](https://docs.nestjs.com/guards#putting-it-all-together)
*
* @publicApi
*/
class Reflector {
static createDecorator(options = {}) {
const metadataKey = options.key ?? (0, uid_1.uid)(21);
const decoratorFn = (metadataValue) => (target, key, descriptor) => {
const value = options.transform
? options.transform(metadataValue)
: metadataValue;
(0, common_1.SetMetadata)(metadataKey, value ?? {})(target, key, descriptor);
};
decoratorFn.KEY = metadataKey;
return decoratorFn;
}
/**
* Retrieve metadata for a specified key or decorator for a specified target.
*
* @example
* `const roles = this.reflector.get<string[]>('roles', context.getHandler());`
*
* @param metadataKey lookup key or decorator for metadata to retrieve
* @param target context (decorated object) to retrieve metadata from
*
*/
get(metadataKeyOrDecorator, target) {
const metadataKey = metadataKeyOrDecorator.KEY ??
metadataKeyOrDecorator;
return Reflect.getMetadata(metadataKey, target);
}
/**
* Retrieve metadata for a specified key or decorator for a specified set of targets.
*
* @param metadataKeyOrDecorator lookup key or decorator for metadata to retrieve
* @param targets context (decorated objects) to retrieve metadata from
*
*/
getAll(metadataKeyOrDecorator, targets) {
return (targets || []).map(target => this.get(metadataKeyOrDecorator, target));
}
/**
* Retrieve metadata for a specified key or decorator for a specified set of targets and merge results.
*
* @param metadataKeyOrDecorator lookup key for metadata to retrieve
* @param targets context (decorated objects) to retrieve metadata from
*
*/
getAllAndMerge(metadataKeyOrDecorator, targets) {
const metadataCollection = this.getAll(metadataKeyOrDecorator, targets).filter(item => item !== undefined);
if ((0, shared_utils_1.isEmpty)(metadataCollection)) {
return metadataCollection;
}
return metadataCollection.reduce((a, b) => {
if (Array.isArray(a)) {
return a.concat(b);
}
if ((0, shared_utils_1.isObject)(a) && (0, shared_utils_1.isObject)(b)) {
return {
...a,
...b,
};
}
return [a, b];
});
}
/**
* Retrieve metadata for a specified key or decorator for a specified set of targets and return a first not undefined value.
*
* @param metadataKeyOrDecorator lookup key or metadata for metadata to retrieve
* @param targets context (decorated objects) to retrieve metadata from
*
*/
getAllAndOverride(metadataKeyOrDecorator, targets) {
for (const target of targets) {
const result = this.get(metadataKeyOrDecorator, target);
if (result !== undefined) {
return result;
}
}
return undefined;
}
}
exports.Reflector = Reflector;