created first API implementation

src/main/java/mops/gruppen2/controller/APIController.java

@@ -0,0 +1,44 @@
+package mops.gruppen2.controller;
+
+
+import com.github.javafaker.Faker;
+import io.swagger.annotations.ApiOperation;
+import io.swagger.annotations.ApiParam;
+import mops.gruppen2.domain.Exceptions.EventException;
+import mops.gruppen2.domain.Group;
+import mops.gruppen2.domain.ProductSwaggerExample;
+import mops.gruppen2.domain.event.Event;
+import mops.gruppen2.service.EventService;
+import mops.gruppen2.service.GroupService;
+import mops.gruppen2.service.SerializationService;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Ein Beispiel für eine API mit Swagger.
+ */
+@RestController
+@RequestMapping("/gruppen2")
+public class APIController {
+
+    private final SerializationService serializationService;
+    private final EventService eventService;
+    private final GroupService groupService;
+
+    public APIController(SerializationService serializationService, EventService eventService, GroupService groupService) {
+        this.serializationService = serializationService;
+        this.eventService = eventService;
+        this.groupService = groupService;
+    }
+
+    @GetMapping("/updatedGroups/{status}")
+    @ApiOperation(value = "Gibt alle Gruppen zurück in denen sich etwas geändert hat")
+    public List<Group> updateGroup(@ApiParam("Status des Anfragestellers")  @PathVariable Long status) throws EventException {
+        List<Event> events = eventService.getNewEvents(status);
+        return groupService.projectEventList(events);
+    }
+
+
+}