123456789101112131415161718192021222324252627282930313233343536373839404142
import constructor from "../types/constructor.ts";import { getParamInfo } from "../reflection-helpers.ts";import { instance as globalContainer } from "../dependency-container.ts";import { isTokenDescriptor } from "../providers/injection-token.ts";import { formatErrorCtor } from "../error-helpers.ts";
/** * Class decorator factory that replaces the decorated class' constructor with * a parameter less constructor that has dependencies auto-resolved * * Note: Resolution is performed using the global container * * @return {Function} The class decorator */function autoInjectable(): (target: constructor<any>) => any {  return function (target: constructor<any>): constructor<any> {    const paramInfo = getParamInfo(target);
    return class extends target {      constructor(...args: any[]) {        super(          ...args.concat(            paramInfo.slice(args.length).map((type, index) => {              try {                if (isTokenDescriptor(type)) {                  return type.multiple ? globalContainer.resolveAll(type.token) : globalContainer.resolve(type.token);                }                return globalContainer.resolve(type);              } catch (e) {                const argIndex = index + args.length;                throw new Error(formatErrorCtor(target, argIndex, e));              }            }),          ),        );      }    };  };}
export default autoInjectable;