mocks/README.md

@@ -0,0 +1,29 @@
+In this directory are some files to mock an auction house to test WebSub local.
+
+To run a local WebSubHub instance
+
+1. Start a mongodb in docker:
+
+-   docker run -d -p 27017:27017 -p 28017:28017 -e AUTH=no tutum/mongodb
+
+2. Install a local hub
+
+-   yarn global add websub-hub
+
+3. Run the hub localy
+
+-   websub-hub -l info -m mongodb://localhost:27017/hub
+
+Create an example subscription
+
+-   node auction-house/subscriber.js
+
+Create an example auctionhouse
+
+-   node auction-house/auctions.js
+
+Publish to the hub
+
+-   node auction-house/publisher.js
+
+Mostly inspired by: https://github.com/hemerajs/websub-hub

mocks/auction-house/auctions.js

@@ -0,0 +1,39 @@
+// Require the framework and instantiate it
+const fastify = require('fastify')({ logger: true })
+
+// Declare a route
+fastify.get('/auctions', async (request, reply) => {
+  console.log('content provided')
+
+  return [
+    {
+      id: '2',
+      content_text: 'This is a second item.',
+      url: 'https://example.org/second-item'
+    },
+    {
+      id: '1',
+      content_html: '<p>Hello, world!</p>',
+      url: 'https://example.org/initial-post'
+    }
+  ]
+})
+
+fastify.get('/websub', async (request, reply) => {
+  console.log('content provided')
+
+  return {
+    topic: 'http://localhost:3100/auctions'
+  }
+})
+
+// Run the server!
+const start = async () => {
+  try {
+    await fastify.listen(3100)
+  } catch (err) {
+    fastify.log.error(err)
+    process.exit(1)
+  }
+}
+start()

mocks/auction-house/publisher.js

@@ -0,0 +1,17 @@
+const axios = require('axios').default
+
+// Run the server!
+const start = async () => {
+  await axios
+    .post('http://localhost:3000/publish', {
+      'hub.mode': 'publish',
+      'hub.url': 'http://localhost:3100/auctions'
+    })
+    .then(response => {
+      console.log(response.data)
+    })
+    .catch(error => {
+      console.log(error)
+    })
+}
+start()

mocks/auction-house/subscriber.js

@@ -0,0 +1,42 @@
+// Require the framework and instantiate it
+const fastify = require('fastify')({ logger: true })
+const axios = require('axios').default
+
+// Declare a route
+fastify.get('/auction-created', async (request, reply) => {
+  console.log('subscription verified', request.query)
+  console.log(request.query)
+  return request.query
+})
+
+fastify.post('/auction-created', async (request, reply) => {
+  console.log('received blog content', request.body)
+  reply.send()
+})
+
+// Run the server!
+const start = async () => {
+  // subscribe to the feed
+
+  try {
+    await fastify.listen(3200)
+  } catch (err) {
+    fastify.log.error(err)
+    process.exit(1)
+  }
+
+  await axios
+    .post('http://localhost:3000', {
+      'hub.callback': 'http://localhost:3200/auction-created',
+      'hub.mode': 'subscribe',
+      'hub.topic': 'http://localhost:3100/auctions',
+      'hub.ws': false
+    })
+    .then(response => {
+      console.log(response.data)
+    })
+    .catch(error => {
+      console.log(error)
+    })
+}
+start()

tapas-auction-house/pom.xml

@@ -58,6 +58,17 @@
             <artifactId>validation-api</artifactId>
             <version>1.1.0.Final</version>
         </dependency>
+        <dependency>
+			<groupId>org.json</groupId>
+			<artifactId>json</artifactId>
+			<version>20210307</version>
+		</dependency>
+        <dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-devtools</artifactId>
+			<scope>runtime</scope>
+			<optional>true</optional>
+		</dependency>
     </dependencies>
 
 	<build>

tapas-auction-house/src/main/java/ch/unisg/tapas/TapasAuctionHouseApplication.java

@@ -7,6 +7,7 @@ import ch.unisg.tapas.common.AuctionHouseResourceDirectory;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.eclipse.paho.client.mqttv3.MqttException;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 
@@ -26,17 +27,21 @@ public class TapasAuctionHouseApplication {
     public static void main(String[] args) {
 		SpringApplication tapasAuctioneerApp = new SpringApplication(TapasAuctionHouseApplication.class);
 
-		// We will use these bootstrap methods in Week 6:
+
-        // bootstrapMarketplaceWithWebSub();
-        // bootstrapMarketplaceWithMqtt();
 
         tapasAuctioneerApp.run(args);
+
+        		// We will use these bootstrap methods in Week 6:
+
+        // bootstrapMarketplaceWithMqtt();
+        bootstrapMarketplaceWithWebSub();
 	}
 
     /**
      * Discovers auction houses and subscribes to WebSub notifications
      */
 	private static void bootstrapMarketplaceWithWebSub() {
+        System.out.println("HAHA");
         List<String> auctionHouseEndpoints = discoverAuctionHouseEndpoints();
         LOGGER.info("Found auction house endpoints: " + auctionHouseEndpoints);
 

tapas-auction-house/src/main/java/ch/unisg/tapas/auctionhouse/adapter/common/clients/WebSubSubscriber.java

@@ -1,6 +1,18 @@
 package ch.unisg.tapas.auctionhouse.adapter.common.clients;
 
+import java.io.IOException;
 import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import org.json.JSONObject;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Component;
 
 /**
  * Subscribes to the WebSub hubs of auction houses discovered at run time. This class is instantiated
@@ -9,7 +21,23 @@ import java.net.URI;
  */
 public class WebSubSubscriber {
 
+    // TODO get this somehow from properties file. But on clue how to do this with static variables
+    static String WEBSUB_HUB_ENDPOINT = "http://localhost:3000";
+    static String AUCTION_HOUSE_ENDPOINT = "http://localhost:8086";
+
+    Logger logger = Logger.getLogger(WebSubSubscriber.class.getName());
+
     public void subscribeToAuctionHouseEndpoint(URI endpoint) {
+        // TODO decide with other groups about auction house endpoint uri to discover websub topics
+        // and replace the hardcoded one with it
+        String topic = discoverWebSubTopic("http://localhost:3100/websub");
+
+        if (topic == null) {
+            return;
+        }
+
+        subscribeToWebSub(topic);
+
         // TODO Subscribe to the auction house endpoint via WebSub:
         // 1. Send a request to the auction house in order to discover the WebSub hub to subscribe to.
         // The request URI should depend on the design of the Auction House HTTP API.
@@ -25,4 +53,61 @@ public class WebSubSubscriber {
         // - W3C WebSub Recommendation: https://www.w3.org/TR/websub/
         // - the implementation notes of the WebSub hub you are using to distribute events
     }
+
+    private String discoverWebSubTopic(String endpoint) {
+        HttpClient client = HttpClient.newHttpClient();
+        HttpRequest request = HttpRequest.newBuilder()
+                .uri(URI.create(endpoint))
+                .header("Content-Type", "application/json")
+                .GET()
+                .build();
+
+
+        try {
+            HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
+            if (response.statusCode() == HttpStatus.OK.value()) {
+                // TODO decide with other groups about response structure and replace the hardcoded
+                // uri with response uri
+                JSONObject jsonObject = new JSONObject(response.body());
+                System.out.println(jsonObject);
+                return jsonObject.getString("topic");
+            } else {
+                logger.log(Level.SEVERE, "Could not find a websub uri");
+            }
+        } catch (InterruptedException e) {
+            logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
+            Thread.currentThread().interrupt();
+        } catch (IOException e) {
+            logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
+        }
+        return null;
+    }
+
+    private void subscribeToWebSub(String topic) {
+        HttpClient client = HttpClient.newHttpClient();
+
+        String body = new JSONObject()
+        .put("hub.callback", AUCTION_HOUSE_ENDPOINT + "/auction-started")
+        .put("hub.mode", "subscribe")
+        .put("hub.topic", topic)
+        .put("hub.ws", false)
+        .toString();
+
+
+        HttpRequest request = HttpRequest.newBuilder()
+                .uri(URI.create(WEBSUB_HUB_ENDPOINT))
+                .header("Content-Type", "application/json")
+                .POST(HttpRequest.BodyPublishers.ofString(body))
+                .build();
+
+
+        try {
+            client.send(request, HttpResponse.BodyHandlers.ofString());
+        } catch (InterruptedException e) {
+            logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
+            Thread.currentThread().interrupt();
+        } catch (IOException e) {
+            logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
+        }
+    }
 }

tapas-auction-house/src/main/java/ch/unisg/tapas/auctionhouse/adapter/in/messaging/websub/AuctionStartedEventListenerWebSubAdapter.java

@@ -1,6 +1,10 @@
 package ch.unisg.tapas.auctionhouse.adapter.in.messaging.websub;
 
 import ch.unisg.tapas.auctionhouse.application.handler.AuctionStartedHandler;
+
+import org.json.JSONArray;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
 
 /**
@@ -13,6 +17,21 @@ public class AuctionStartedEventListenerWebSubAdapter {
     public AuctionStartedEventListenerWebSubAdapter(AuctionStartedHandler auctionStartedHandler) {
         this.auctionStartedHandler = auctionStartedHandler;
     }
+    /**
+    *   Controller which listens to auction-started callbacks
+    *   @return 200 OK
+    **/
+    @PostMapping(path = "/auction-started")
+    public ResponseEntity<Void> handleExecutorAddedEvent(@RequestBody String payload) {
 
-    //TODO
+        // Payload should be a JSONArray with auctions
+        JSONArray jsonArray = new JSONArray(payload);
+        for (Object auction : jsonArray) {
+            System.out.println(auction);
+            // TODO logic to call handleAuctionStartedEvent()
+            // auctionStartedHandler.handleAuctionStartedEvent(auctionStartedEvent)
+        }
+
+        return new ResponseEntity<>(HttpStatus.OK);
+    }
 }

tapas-auction-house/src/main/java/ch/unisg/tapas/auctionhouse/adapter/in/messaging/websub/ValidateIntentWebSubAdapter.java

@@ -0,0 +1,36 @@
+package ch.unisg.tapas.auctionhouse.adapter.in.messaging.websub;
+
+import org.json.JSONObject;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+/**
+ * This class validates the subscription intent from the websub hub
+ */
+@RestController
+public class ValidateIntentWebSubAdapter {
+
+    @Value("${application.environment}")
+    private String environment;
+
+    @GetMapping(path = "/auction-started")
+    public ResponseEntity<String> handleExecutorAddedEvent(@RequestParam("hub.challenge") String challenge) {
+
+
+
+        // Different implementation depending on local development or production
+        if (environment.equalsIgnoreCase("development")) {
+            HttpHeaders headers = new HttpHeaders();
+            headers.add("Content-Type", "application/json");
+            String body = new JSONObject()
+                .put("hub.challenge", challenge)
+                .toString();
+            return new ResponseEntity<>(body, headers, HttpStatus.OK);
+        } else {
+            return new ResponseEntity<>(challenge, HttpStatus.OK);
+        }
+    }
+}

tapas-auction-house/src/main/java/ch/unisg/tapas/auctionhouse/adapter/out/messaging/websub/PublishAuctionStartedEventWebSubAdapter.java

@@ -4,12 +4,16 @@ import ch.unisg.tapas.auctionhouse.application.port.out.AuctionStartedEventPort;
 import ch.unisg.tapas.auctionhouse.domain.Auction;
 import ch.unisg.tapas.auctionhouse.domain.AuctionStartedEvent;
 import ch.unisg.tapas.common.ConfigProperties;
+
+import org.json.JSONObject;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Primary;
 import org.springframework.http.HttpStatus;
 import org.springframework.stereotype.Component;
 
 import java.io.IOException;
+import java.net.URI;
 import java.net.URLEncoder;
 import java.net.http.HttpClient;
 import java.net.http.HttpRequest;
@@ -17,6 +21,8 @@ import java.net.http.HttpResponse;
 import java.nio.charset.StandardCharsets;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 import java.util.stream.Collectors;
 
 /**
@@ -30,8 +36,38 @@ public class PublishAuctionStartedEventWebSubAdapter implements AuctionStartedEv
     @Autowired
     private ConfigProperties config;
 
+    @Value("${auctionhouse.uri}")
+    private String auctionHouseUri;
+
+    @Value("${websub.hub.uri}")
+    private String webSubHubUri;
+
+    Logger logger = Logger.getLogger(PublishAuctionStartedEventWebSubAdapter.class.getName());
+
     @Override
     public void publishAuctionStartedEvent(AuctionStartedEvent event) {
-        // TODO
+        HttpClient client = HttpClient.newHttpClient();
+
+        String body = new JSONObject()
+        .put("hub.url", auctionHouseUri + "/auctions")
+        .put("hub.mode", "publish")
+        .toString();
+
+
+        HttpRequest request = HttpRequest.newBuilder()
+                .uri(URI.create(webSubHubUri))
+                .header("Content-Type", "application/json")
+                .POST(HttpRequest.BodyPublishers.ofString(body))
+                .build();
+
+
+        try {
+            client.send(request, HttpResponse.BodyHandlers.ofString());
+        } catch (InterruptedException e) {
+            logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
+            Thread.currentThread().interrupt();
+        } catch (IOException e) {
+            logger.log(Level.SEVERE, e.getLocalizedMessage(), e);
+        }
     }
 }

tapas-auction-house/src/main/resources/application.properties

@@ -6,3 +6,7 @@ websub.hub.publish=https://websub.appspot.com/
 group=tapas-group-tutors
 auction.house.uri=https://tapas-auction-house.86-119-34-23.nip.io/
 tasks.list.uri=https://tapas-tasks.86-119-34-23.nip.io/
+
+application.environment=development
+auctionhouse.uri=http://localhost:8086
+websub.hub.uri=http://localhost:3000