@triviality/core/src/Context/ServicesContext.ts

Purely typed service container

import { ServicesAsFactories as SAF, ServiceTag, SF } from '../ServiceFactory';
import { ServiceFunctionReferenceContainerInterface } from '../Container/ServiceFunctionReferenceContainerInterface';

/**
 * Context helper for retrieving services from context.
 */
export interface ServicesContext<T> {
  dependencies(): T;

  service<K1 extends keyof T>(t1: K1): SF<T[K1]>;

  /**
   * @typeGenerator({ templates: ["  services<{{K% extends keyof T}}>({{t%: K%}}): SAF<Pick<T, {{K% - | }}>> & [{{SF<T[K%]>}}];\n"] })
   */
  services<K1 extends keyof T>(t1: K1): SAF<Pick<T, K1>> & [SF<T[K1]>];

  services<K1 extends keyof T, K2 extends keyof T>(t1: K1, t2: K2): SAF<Pick<T, K1 | K2>> & [SF<T[K1]>, SF<T[K2]>];

  services<K1 extends keyof T, K2 extends keyof T, K3 extends keyof T>(t1: K1, t2: K2, t3: K3): SAF<Pick<T, K1 | K2 | K3>> & [SF<T[K1]>, SF<T[K2]>, SF<T[K3]>];

  services<K1 extends keyof T, K2 extends keyof T, K3 extends keyof T, K4 extends keyof T>(t1: K1, t2: K2, t3: K3, t4: K4): SAF<Pick<T, K1 | K2 | K3 | K4>> & [SF<T[K1]>, SF<T[K2]>, SF<T[K3]>, SF<T[K4]>];

  services<K1 extends keyof T, K2 extends keyof T, K3 extends keyof T, K4 extends keyof T, K5 extends keyof T>(t1: K1, t2: K2, t3: K3, t4: K4, t5: K5): SAF<Pick<T, K1 | K2 | K3 | K4 | K5>> & [SF<T[K1]>, SF<T[K2]>, SF<T[K3]>, SF<T[K4]>, SF<T[K5]>];

  services<K1 extends keyof T, K2 extends keyof T, K3 extends keyof T, K4 extends keyof T, K5 extends keyof T, K6 extends keyof T>(t1: K1, t2: K2, t3: K3, t4: K4, t5: K5, t6: K6): SAF<Pick<T, K1 | K2 | K3 | K4 | K5 | K6>> & [SF<T[K1]>, SF<T[K2]>, SF<T[K3]>, SF<T[K4]>, SF<T[K5]>, SF<T[K6]>];

  services<K1 extends keyof T, K2 extends keyof T, K3 extends keyof T, K4 extends keyof T, K5 extends keyof T, K6 extends keyof T, K7 extends keyof T>(t1: K1, t2: K2, t3: K3, t4: K4, t5: K5, t6: K6, t7: K7): SAF<Pick<T, K1 | K2 | K3 | K4 | K5 | K6 | K7>> & [SF<T[K1]>, SF<T[K2]>, SF<T[K3]>, SF<T[K4]>, SF<T[K5]>, SF<T[K6]>, SF<T[K7]>];

  services<K1 extends keyof T, K2 extends keyof T, K3 extends keyof T, K4 extends keyof T, K5 extends keyof T, K6 extends keyof T, K7 extends keyof T, K8 extends keyof T>(t1: K1, t2: K2, t3: K3, t4: K4, t5: K5, t6: K6, t7: K7, t8: K8): SAF<Pick<T, K1 | K2 | K3 | K4 | K5 | K6 | K7 | K8>> & [SF<T[K1]>, SF<T[K2]>, SF<T[K3]>, SF<T[K4]>, SF<T[K5]>, SF<T[K6]>, SF<T[K7]>, SF<T[K8]>];

  services<K1 extends keyof T, K2 extends keyof T, K3 extends keyof T, K4 extends keyof T, K5 extends keyof T, K6 extends keyof T, K7 extends keyof T, K8 extends keyof T, K9 extends keyof T>(t1: K1, t2: K2, t3: K3, t4: K4, t5: K5, t6: K6, t7: K7, t8: K8, t9: K9): SAF<Pick<T, K1 | K2 | K3 | K4 | K5 | K6 | K7 | K8 | K9>> & [SF<T[K1]>, SF<T[K2]>, SF<T[K3]>, SF<T[K4]>, SF<T[K5]>, SF<T[K6]>, SF<T[K7]>, SF<T[K8]>, SF<T[K9]>];

  services<K1 extends keyof T, K2 extends keyof T, K3 extends keyof T, K4 extends keyof T, K5 extends keyof T, K6 extends keyof T, K7 extends keyof T, K8 extends keyof T, K9 extends keyof T, K10 extends keyof T>(t1: K1, t2: K2, t3: K3, t4: K4, t5: K5, t6: K6, t7: K7, t8: K8, t9: K9, t10: K10): SAF<Pick<T, K1 | K2 | K3 | K4 | K5 | K6 | K7 | K8 | K9 | K10>> & [SF<T[K1]>, SF<T[K2]>, SF<T[K3]>, SF<T[K4]>, SF<T[K5]>, SF<T[K6]>, SF<T[K7]>, SF<T[K8]>, SF<T[K9]>, SF<T[K10]>];

  /**
   * Fetch instance from service.
   */
  instance<ServiceKey extends keyof T>(serviceKey: ServiceKey): T[ServiceKey];

  /**
   * @typeGenerator({ templates: ["  instances<{{K% extends keyof T}}>({{t%: K%}}): Pick<T, {{K% - | }}> & [{{T[K%]}}];\n"] })
   */
  instances<K1 extends keyof T>(t1: K1): Pick<T, K1> & [T[K1]];

  instances<K1 extends keyof T, K2 extends keyof T>(t1: K1, t2: K2): Pick<T, K1 | K2> & [T[K1], T[K2]];

  instances<K1 extends keyof T, K2 extends keyof T, K3 extends keyof T>(t1: K1, t2: K2, t3: K3): Pick<T, K1 | K2 | K3> & [T[K1], T[K2], T[K3]];

  instances<K1 extends keyof T, K2 extends keyof T, K3 extends keyof T, K4 extends keyof T>(t1: K1, t2: K2, t3: K3, t4: K4): Pick<T, K1 | K2 | K3 | K4> & [T[K1], T[K2], T[K3], T[K4]];

  instances<K1 extends keyof T, K2 extends keyof T, K3 extends keyof T, K4 extends keyof T, K5 extends keyof T>(t1: K1, t2: K2, t3: K3, t4: K4, t5: K5): Pick<T, K1 | K2 | K3 | K4 | K5> & [T[K1], T[K2], T[K3], T[K4], T[K5]];

  instances<K1 extends keyof T, K2 extends keyof T, K3 extends keyof T, K4 extends keyof T, K5 extends keyof T, K6 extends keyof T>(t1: K1, t2: K2, t3: K3, t4: K4, t5: K5, t6: K6): Pick<T, K1 | K2 | K3 | K4 | K5 | K6> & [T[K1], T[K2], T[K3], T[K4], T[K5], T[K6]];

  instances<K1 extends keyof T, K2 extends keyof T, K3 extends keyof T, K4 extends keyof T, K5 extends keyof T, K6 extends keyof T, K7 extends keyof T>(t1: K1, t2: K2, t3: K3, t4: K4, t5: K5, t6: K6, t7: K7): Pick<T, K1 | K2 | K3 | K4 | K5 | K6 | K7> & [T[K1], T[K2], T[K3], T[K4], T[K5], T[K6], T[K7]];

  instances<K1 extends keyof T, K2 extends keyof T, K3 extends keyof T, K4 extends keyof T, K5 extends keyof T, K6 extends keyof T, K7 extends keyof T, K8 extends keyof T>(t1: K1, t2: K2, t3: K3, t4: K4, t5: K5, t6: K6, t7: K7, t8: K8): Pick<T, K1 | K2 | K3 | K4 | K5 | K6 | K7 | K8> & [T[K1], T[K2], T[K3], T[K4], T[K5], T[K6], T[K7], T[K8]];

  instances<K1 extends keyof T, K2 extends keyof T, K3 extends keyof T, K4 extends keyof T, K5 extends keyof T, K6 extends keyof T, K7 extends keyof T, K8 extends keyof T, K9 extends keyof T>(t1: K1, t2: K2, t3: K3, t4: K4, t5: K5, t6: K6, t7: K7, t8: K8, t9: K9): Pick<T, K1 | K2 | K3 | K4 | K5 | K6 | K7 | K8 | K9> & [T[K1], T[K2], T[K3], T[K4], T[K5], T[K6], T[K7], T[K8], T[K9]];

  instances<K1 extends keyof T, K2 extends keyof T, K3 extends keyof T, K4 extends keyof T, K5 extends keyof T, K6 extends keyof T, K7 extends keyof T, K8 extends keyof T, K9 extends keyof T, K10 extends keyof T>(t1: K1, t2: K2, t3: K3, t4: K4, t5: K5, t6: K6, t7: K7, t8: K8, t9: K9, t10: K10): Pick<T, K1 | K2 | K3 | K4 | K5 | K6 | K7 | K8 | K9 | K10> & [T[K1], T[K2], T[K3], T[K4], T[K5], T[K6], T[K7], T[K8], T[K9], T[K10]];

}

export const createFeatureFactoryServicesContext = (api: ServiceFunctionReferenceContainerInterface): ServicesContext<any> => ({
  dependencies: () => {
    const container: Record<ServiceTag, unknown> = {};
    api.references().taggedPairs().forEach(([tag, dependency]) => {
      Object.defineProperty(container, tag, {
        get: () => dependency.getProxy()(),
        enumerable: true,
        configurable: false,
      });
    });
    return container;
  },
  service: api.getService as any,
  services: services(servicesByTags(api.getService)) as any,
  instances: instancesByTags(servicesByTags(api.getService)) as any,
  instance: (key) => api.getService(key as any)(),
});

export function services(getServiceFactory: (...tags: ServiceTag[]) => SF[]): <T, K extends keyof T>(...keys: K[]) => Pick<T, K> & SF[] {
  return (...keys) => {
    const byIndex: any = getServiceFactory(...keys as any);
    keys.forEach((key, index) => {
      byIndex[key] = byIndex[index];
    });
    return byIndex;
  };
}

export function instancesByTags(getServiceFactory: (...tags: ServiceTag[]) => SF[]): <T, K extends keyof T>(...keys: K[]) => Pick<T, K> & SF[] {
  return (...keys) => {
    const byIndex: any = getServiceFactory(...keys as any);
    keys.forEach((key, index) => {
      byIndex[index] = byIndex[index]();
      byIndex[key] = byIndex[index];
    });
    return byIndex;
  };
}

/**
 * Multiple services by tags.
 *
 * @typeGenerator({
 *  templates: [
 *    // Service by '(tag) => service' with currying.
 *    "export function servicesByTags<{{T%, S% extends SF}}>(serviceByTag: {{((tag: T%) => S%) - | }}): ({{t%: T%}}) => [{{S%}}];",
 *  ],
 * })
 */
export function servicesByTags<T1, S1 extends SF>(serviceByTag: ((tag: T1) => S1)): (t1: T1) => [S1];
export function servicesByTags<T1, S1 extends SF, T2, S2 extends SF>(serviceByTag: ((tag: T1) => S1) | ((tag: T2) => S2)): (t1: T1, t2: T2) => [S1, S2];
export function servicesByTags<T1, S1 extends SF, T2, S2 extends SF, T3, S3 extends SF>(serviceByTag: ((tag: T1) => S1) | ((tag: T2) => S2) | ((tag: T3) => S3)): (t1: T1, t2: T2, t3: T3) => [S1, S2, S3];
export function servicesByTags<T1, S1 extends SF, T2, S2 extends SF, T3, S3 extends SF, T4, S4 extends SF>(serviceByTag: ((tag: T1) => S1) | ((tag: T2) => S2) | ((tag: T3) => S3) | ((tag: T4) => S4)): (t1: T1, t2: T2, t3: T3, t4: T4) => [S1, S2, S3, S4];
export function servicesByTags<T1, S1 extends SF, T2, S2 extends SF, T3, S3 extends SF, T4, S4 extends SF, T5, S5 extends SF>(serviceByTag: ((tag: T1) => S1) | ((tag: T2) => S2) | ((tag: T3) => S3) | ((tag: T4) => S4) | ((tag: T5) => S5)): (t1: T1, t2: T2, t3: T3, t4: T4, t5: T5) => [S1, S2, S3, S4, S5];
export function servicesByTags<T1, S1 extends SF, T2, S2 extends SF, T3, S3 extends SF, T4, S4 extends SF, T5, S5 extends SF, T6, S6 extends SF>(serviceByTag: ((tag: T1) => S1) | ((tag: T2) => S2) | ((tag: T3) => S3) | ((tag: T4) => S4) | ((tag: T5) => S5) | ((tag: T6) => S6)): (t1: T1, t2: T2, t3: T3, t4: T4, t5: T5, t6: T6) => [S1, S2, S3, S4, S5, S6];
export function servicesByTags<T1, S1 extends SF, T2, S2 extends SF, T3, S3 extends SF, T4, S4 extends SF, T5, S5 extends SF, T6, S6 extends SF, T7, S7 extends SF>(serviceByTag: ((tag: T1) => S1) | ((tag: T2) => S2) | ((tag: T3) => S3) | ((tag: T4) => S4) | ((tag: T5) => S5) | ((tag: T6) => S6) | ((tag: T7) => S7)): (t1: T1, t2: T2, t3: T3, t4: T4, t5: T5, t6: T6, t7: T7) => [S1, S2, S3, S4, S5, S6, S7];
export function servicesByTags<T1, S1 extends SF, T2, S2 extends SF, T3, S3 extends SF, T4, S4 extends SF, T5, S5 extends SF, T6, S6 extends SF, T7, S7 extends SF, T8, S8 extends SF>(serviceByTag: ((tag: T1) => S1) | ((tag: T2) => S2) | ((tag: T3) => S3) | ((tag: T4) => S4) | ((tag: T5) => S5) | ((tag: T6) => S6) | ((tag: T7) => S7) | ((tag: T8) => S8)): (t1: T1, t2: T2, t3: T3, t4: T4, t5: T5, t6: T6, t7: T7, t8: T8) => [S1, S2, S3, S4, S5, S6, S7, S8];
export function servicesByTags<T1, S1 extends SF, T2, S2 extends SF, T3, S3 extends SF, T4, S4 extends SF, T5, S5 extends SF, T6, S6 extends SF, T7, S7 extends SF, T8, S8 extends SF, T9, S9 extends SF>(serviceByTag: ((tag: T1) => S1) | ((tag: T2) => S2) | ((tag: T3) => S3) | ((tag: T4) => S4) | ((tag: T5) => S5) | ((tag: T6) => S6) | ((tag: T7) => S7) | ((tag: T8) => S8) | ((tag: T9) => S9)): (t1: T1, t2: T2, t3: T3, t4: T4, t5: T5, t6: T6, t7: T7, t8: T8, t9: T9) => [S1, S2, S3, S4, S5, S6, S7, S8, S9];
export function servicesByTags<T1, S1 extends SF, T2, S2 extends SF, T3, S3 extends SF, T4, S4 extends SF, T5, S5 extends SF, T6, S6 extends SF, T7, S7 extends SF, T8, S8 extends SF, T9, S9 extends SF, T10, S10 extends SF>(serviceByTag: ((tag: T1) => S1) | ((tag: T2) => S2) | ((tag: T3) => S3) | ((tag: T4) => S4) | ((tag: T5) => S5) | ((tag: T6) => S6) | ((tag: T7) => S7) | ((tag: T8) => S8) | ((tag: T9) => S9) | ((tag: T10) => S10)): (t1: T1, t2: T2, t3: T3, t4: T4, t5: T5, t6: T6, t7: T7, t8: T8, t9: T9, t10: T10) => [S1, S2, S3, S4, S5, S6, S7, S8, S9, S10];
export function servicesByTags(getServiceFactory: any): any {
  return ((...tags: string[]) => {
    return tags.map((tag) => {
      return () => getServiceFactory(tag)();
    });
  }) as any;
}