feat(app): check if user can acceed to live masterclass

src/main/java/fr/sweetiez/api/adapter/delivery/event/StreamingEventEndPoints.java

@@ -124,4 +124,14 @@ public ResponseEntity<Collection<EventResponse>> retrieveMyEvents(UUID id) {
             return ResponseEntity.badRequest().build();
         }
     }
+
+    public ResponseEntity<?> participate(AttendMasterClassRequest request) {
+        var useCase = new AttendMasterclass(events);
+        var canAttend = useCase.attendMasterclass(request);
+
+        var response =
+                (canAttend) ? ResponseEntity.ok() : ResponseEntity.badRequest();
+
+        return response.build();
+    }
 }

src/main/java/fr/sweetiez/api/core/events/use_case/streaming/AttendMasterClassRequest.java

@@ -0,0 +1,5 @@
+package fr.sweetiez.api.core.events.use_case.streaming;
+
+import java.util.UUID;
+
+public record AttendMasterClassRequest(UUID eventID, String participantID) {}

src/main/java/fr/sweetiez/api/core/events/use_case/streaming/AttendMasterclass.java

@@ -0,0 +1,31 @@
+package fr.sweetiez.api.core.events.use_case.streaming;
+
+import fr.sweetiez.api.core.events.events.streaming_event.StreamingEvents;
+
+public class AttendMasterclass {
+
+    private final StreamingEvents streamingEvents;
+
+    public AttendMasterclass(StreamingEvents streamingEvents) {
+        this.streamingEvents = streamingEvents;
+    }
+
+    public boolean attendMasterclass(AttendMasterClassRequest request) {
+        var canAttend = false;
+        var optionalEvent = streamingEvents.findById(request.eventID());
+
+        if (optionalEvent.isPresent()) {
+            var subscribersID = optionalEvent.get()
+                    .subscribers()
+                    .stream()
+                    .map(customer -> customer.id().value())
+                    .toList();
+
+            if (subscribersID.contains(request.participantID())) {
+                canAttend = true;
+            }
+        }
+
+        return canAttend;
+    }
+}

src/main/java/fr/sweetiez/api/infrastructure/delivery/events/SpringStreamingEventController.java

@@ -2,6 +2,7 @@
 
 import fr.sweetiez.api.adapter.delivery.event.StreamingEventEndPoints;
 import fr.sweetiez.api.core.events.events.streaming_event.StreamingEvent;
+import fr.sweetiez.api.core.events.use_case.streaming.AttendMasterClassRequest;
 import fr.sweetiez.api.core.events.use_case.streaming.models.requests.CreateStreamingEventRequestDTO;
 import fr.sweetiez.api.core.events.use_case.streaming.models.requests.RescheduleEventRequest;
 import fr.sweetiez.api.core.events.use_case.streaming.models.requests.SubscribeEventRequest;
@@ -61,4 +62,9 @@ public ResponseEntity<Collection<EventResponse>> retrieveAllPublished() {
     public ResponseEntity<Collection<EventAdminResponse>> retrieveAll() {
         return endPoints.retrieveAll();
     }
+
+    @PostMapping("/events/participate")
+    public ResponseEntity<?> canAttendMasterclass(@RequestBody AttendMasterClassRequest request) {
+        return endPoints.participate(request);
+    }
 }