Deco is a utility library for Deno developers

// curl localhost:8080/hello 
// curl localhost:8080/metrics
@Http.ServerController()
class Server {
  @Http.Get()
  hello() {}
}

Http.serve({
  controllers: [Server],
});

// curl http://localhost:8080/api
// curl http://localhost:8080/api/1
// curl -v -X POST "http://localhost:8080/api?q=1" -d "test data" -H "x-access-token: eyJhbGciOiJIUzUxMiIsInR5cCI6IkpXVCJ9.eyJ1c2VyIjoiZGVjbyJ9.ae9rDEkN3goWCuc1-Dsbm9lX7kVJPHC8dlnKMFI1Gs-Y26kvGGo0UyQkMih0-zicLgx1viGLSufwfOctC1nWLQ"

import { Http } from "../decorators/httpserver.decorator.ts";
import { sleep } from "../utils/utils.ts";

@Http.ServerController({ schema: { fileName: "api.yaml" } })
class ExampleOpenAPI {}

const cryptoKey = await crypto.subtle.importKey(
  "jwk",
  JSON.parse(Deno.readTextFileSync("key.jwk")),
  { name: "HMAC", hash: "SHA-512" },
  true,
  [
    "sign",
    "verify",
  ],
);

@Http.ServerController()
class ExampleCustomAPI {
  counter = 0;

  @Http.Get("/api/:id")
  get({ id, url }: { id: string; url: URL }) {
    return {
      body: `[GET /api/:id] 😎 (got id: "${id}", query: "${
        decodeURIComponent(url.searchParams.toString())
      }")`,
    };
  }

  @Http.Post()
  @Http.Auth({ cryptoKey })
  async api(
    { url, request, auth }: {
      url: URL;
      request: Request;
      auth: Record<string, unknown>;
    },
  ) {
    const data = await request.text();
    return {
      body: `[POST /api] 😎 (got data: "${data}", auth data: "${
        JSON.stringify(auth)
      }", query: "${
        decodeURIComponent(url.searchParams.toString())
      }", counter="${++this.counter}")`,
    };
  }

  @Http.Get("/static/*")
  static({ "*": path }: { "*": string }) {
    return {
      body: `[GET /static/*] 😎 (got path: "${path}")`,
    };
  }
}

@Http.ServerController()
class ExampleStream {
  @Http.EventStream()
  async *stream() {
    yield ": Hello from stream\n\n";
    while (true) {
      await sleep(1000);
      yield `event: tick\ndata: ${new Date().toISOString()}\n\n\n`;
    }
  }
}

@Http.ServerController()
class ExampleLimits {
  @Http.Get()
  @Http.RateLimit({ rps: 50 })
  rpsTest() {}
}

console.log("Server started...");
Http.serve({
  controllers: [ExampleOpenAPI, ExampleCustomAPI, ExampleStream, ExampleLimits],
});

// Start Dapr sidecar in local environment:
//    dapr run --app-id sidecar --dapr-http-port 3500 --components-path ./components
// Run the example:
//    dapr --app-id deco-app --app-port 3000 --components-path ./components run -- deno run -A --unstable --watch example_dapr.ts
// Publish message to topic A:
//    dapr publish --publish-app-id sidecar --pubsub pubsub --topic A --data '{"data": "message for topic A"}'
// Publish message to topic B and get Telegrom notification (needs TELEGRAM_TOKEN and TELEGRAM_CHATID exist in the secrets store):
//    dapr publish --publish-app-id sidecar --pubsub pubsub --topic B --data '{"text": "Hello from Deco.Dapr!"}'
// Publish message to topic C to see raw message format:
//    dapr publish --publish-app-id sidecar --pubsub pubsub --topic C --data '{"raw": "raw message for topic C"}'
// Invoke "test" service
//    dapr invoke --app-id deco-app --verb GET --method test
// Send data to the actor
//    curl -X POST "http://localhost:3500/v1.0/actors/TestActor1/1/method/testMethod1" -d "{test: 'data'}"

import {
  Actor,
  Bindings,
  Dapr,
  PubSub,
  Secrets,
  Service,
  State,
} from "../../decorators/dapr.decorator.ts";

const { TELEGRAM_CHATID, TELEGRAM_TOKEN } = await Secrets.getBulk({
  store: "example-secrets-store",
});

const pubSubName = "pubsub";

@Dapr.AppController({ pubSubName })
class PubSubExample1 {
  private s = "private1";
  @PubSub.subscribeTo()
  A({ data }: { data: unknown }) {
    console.log("topicA =>", data, this);
  }

  @PubSub.subscribeTo()
  B({ data }: { data: Record<string, unknown> }) {
    console.log("topicB =>", data, this);
    if (data.text && TELEGRAM_CHATID && TELEGRAM_TOKEN) {
      const { text } = data;
      const path =
        `/bot${TELEGRAM_TOKEN}/sendMessage?chat_id=${TELEGRAM_CHATID}&text=${text}`;
      Bindings.invoke({
        bindingName: "telegram",
        operation: "GET",
        metadata: { path },
      });
    }
  }
}

@Dapr.AppController({ pubSubName })
class PubSubExample2 {
  private s = "private2";
  @PubSub.subscribeTo({ metadata: { rawPayload: "true" } })
  C(raw: Record<string, unknown>) {
    console.log("topicC =>", raw, this);
  }
}

@Dapr.AppController()
class PubSubExample3 {
  private s = "private3";
  @PubSub.subscribeTo({ pubSubName })
  D({ data }: { data: unknown }) {
    console.log("topicD =>", data, this);
    console.log("publishing to topic A");
    PubSub.publish({
      pubSubName,
      topicName: "A",
      data,
    });
  }
}

@Dapr.AppController()
class ServiceExample1 {
  private counter = 0;

  @Service.expose()
  async test({ request }: { request: Request }) {
    // deno-fmt-ignore
    console.log(`test service called, counter: ${++this.counter}, data = "${await request.text()}"`);
    return {
      body: `test reply, counter: ${this.counter}`,
    };
  }

  @Bindings.listenTo()
  tweets({ text }: { text: Record<string, unknown> }) {
    console.log(`🐦  => "${text}"`);
  }
}

@Dapr.AppController()
class TestActor1 {
  private counter = 0;

  @Actor.event()
  activate({ actorType, actorId }: { actorType: string; actorId: string }) {
    console.log("TestActor1 activated", this);
    this.counter = 0;
    Actor.setReminder({
      actorType,
      actorId,
      reminderName: "reminder",
      period: "5s",
    });
  }

  @Actor.event()
  async deactivate(
    { actorType, actorId }: { actorType: string; actorId: string },
  ) {
    console.log("TestActor1 deactivation", this);
    const reminder = await Actor.getReminder({
      actorType,
      actorId,
      reminderName: "reminder",
    });
    console.log("reminder =>", reminder);
    await Actor.deleteReminder({
      actorType,
      actorId,
      reminderName: "reminder",
    });
  }

  @Actor.event()
  reminder() {
    console.log("TestActor1 reminder called");
  }

  @Actor.method()
  async testMethod1({ request }: { request: Request }) {
    const data = await request.text();
    console.log(
      "TestActor1/testMethod1() called, data =",
      data,
      ", counter =",
      ++this.counter,
    );
  }
}

@Dapr.AppController()
class TestActor2 {
  private readonly tag = "TestActor2";

  @Actor.method()
  testMethod1({ actorType, actorId }: { actorType: string; actorId: string }) {
    console.log("TestActor2/testMethod1() called,", this);
    Actor.setTimer({ actorType, actorId, timerName: "timer", dueTime: "10s" });
  }

  @Actor.event()
  timer() {
    console.log("TestActor2/timer fired");
  }
}

// Setting and getting state
await State.set({
  storename: "example-state-store",
  data: [{ key: "key1", value: "value1" }, { key: "key3", value: "value3" }],
});
// deno-fmt-ignore
console.log("key1=", await State.get({ storename: "example-state-store", key: "key1" }));
// deno-fmt-ignore
console.log("missing=", await State.get({storename: "example-state-store", key: "missing" }));
// deno-fmt-ignore
console.log("bulk=", await State.getBulk({storename: "example-state-store", data: { keys: ["key1", "missing", "key3"] }}));

console.log("Dapr app started...");
Dapr.start({
  appPort: 3000,
  actorIdleTimeout: "5s",
  controllers: [
    PubSubExample1,
    PubSubExample2,
    PubSubExample3,
    ServiceExample1,
    TestActor1,
    TestActor2,
  ],
});