Implemented follower logic

src/main/java/dev/mednikov/social/connections/web/FollowerRestController.java

@@ -0,0 +1,45 @@
+package dev.mednikov.social.connections.web;
+
+import dev.mednikov.social.connections.domain.CreateFollowerRequestDto;
+import dev.mednikov.social.connections.domain.FollowerDto;
+import dev.mednikov.social.connections.services.FollowerService;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.Optional;
+
+@RestController
+@RequestMapping("/followers")
+public class FollowerRestController {
+
+    private final FollowerService followerService;
+
+    public FollowerRestController(FollowerService followerService) {
+        this.followerService = followerService;
+    }
+
+    @GetMapping("/find")
+    public ResponseEntity<FollowerDto> findExistingFollower (
+            @RequestParam(value = "followerId", required = true) String followerId,
+            @RequestParam(value = "followedId", required = true) String followedId
+    ) {
+        Long ownerId = Long.parseLong(followerId);
+        Long followedUserId = Long.parseLong(followedId);
+        Optional<FollowerDto> result = this.followerService.findExistingFollower(ownerId, followedUserId);
+        return ResponseEntity.of(result);
+    }
+
+    @PostMapping("/create")
+    @ResponseStatus(HttpStatus.CREATED)
+    public @ResponseBody FollowerDto createFollower (@RequestBody CreateFollowerRequestDto body) {
+        return this.followerService.createFollower(body);
+    }
+
+    @DeleteMapping("/delete/{id}")
+    @ResponseStatus(HttpStatus.NO_CONTENT)
+    public void deleteFollower (@PathVariable Long id){
+        this.followerService.deleteFollower(id);
+    }
+
+}