hono-simple-di/dist/index.js

A small, type-safe DI library optimized for hono.js.

// src/dependency.ts
var Dependency = class {
  constructor(serviceInitializer, opts) {
    this.serviceInitializer = serviceInitializer;
    this.opts = opts;
  }
  serviceInjected;
  serviceCached;
  // used as a basis for caching when evaluating the request scope
  lastRequest;
  /**
   * Injects a service instance directly. Useful for overriding the default service.
   */
  injection(service) {
    this.serviceInjected = service;
    return this;
  }
  /**
   * Clear injected service.
   */
  clearInjected() {
    this.serviceInjected = void 0;
    return this;
  }
  /**
   * Resolve service.
   */
  async resolve(c) {
    if (this.serviceInjected) {
      return this.serviceInjected;
    }
    if (this.opts?.scope === "request" && this.lastRequest !== c.req.raw) {
      this.serviceCached = void 0;
      this.lastRequest = c.req.raw;
    }
    const service = this.serviceCached ??= await this.serviceInitializer(c);
    return service;
  }
  /**
   * Creates a middleware that injects the service into the context.
   */
  middleware(contextKey) {
    return async (c, next) => {
      const service = await this.resolve(c);
      c.set(contextKey, service);
      await next();
    };
  }
};
export {
  Dependency
};