Update the indicator controller to have CRUD operations.

src/main/java/space/kklochko/spring_rest_example/controllers/IndicatorController.java

@@ -1,7 +1,11 @@
 package space.kklochko.spring_rest_example.controllers;
 
+import jakarta.persistence.Entity;
+import jakarta.persistence.EntityManager;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
+import space.kklochko.spring_rest_example.db.repositories.IndicatorRepository;
 import space.kklochko.spring_rest_example.models.Indicator;
 
 import java.sql.Timestamp;
@@ -13,22 +17,63 @@ import java.util.UUID;
 @RequestMapping("/api/v1/indicators")
 public class IndicatorController {
     @Autowired
-    Indicator indicator;
-    @GetMapping("/{indicatorId}")
+    EntityManager manager;
+
+    @Autowired
+    IndicatorRepository indicatorRepository;
+
+    @PostMapping
     @ResponseBody
-    public Indicator getIndicator(@PathVariable UUID indicatorId) {
-        return indicator;
+    public ResponseEntity<Object> create(@RequestBody Indicator indicator) {
+        Indicator isExist = indicatorRepository.read(indicator.getId());
+
+        if(isExist != null)
+            return ResponseEntity.status(500).body("Failed to create the indicator, because the id is already used!!!");
+
+        boolean successful = indicatorRepository.create(indicator);
+
+        if(!successful)
+            return ResponseEntity.status(500).body("Failed to create the indicator");
+
+	return ResponseEntity.status(201).body("The indicator created successfully");
+    }
+
+    @GetMapping("/{id}")
+    @ResponseBody
+    public Indicator get(@PathVariable UUID id) {
+        return indicatorRepository.read(id);
     }
 
     @GetMapping
     @ResponseBody
-    public List<Indicator> getIndicators() {
-        UUID id = UUID.fromString("becbafac-702c-11ee-9113-c0e4349366ab");
-        Timestamp timestamp = Timestamp.valueOf("2023-10-18 14:30:00");
-        Indicator indicator = new Indicator(id, "Blood2", "Fine2", timestamp);
+    public List<Indicator> getAll() {
+        return indicatorRepository.readAll();
+    }
 
-        List<Indicator> indicators = new ArrayList<>();
-        indicators.add(indicator);
-        return indicators;
+    @PutMapping
+    @ResponseBody
+    public ResponseEntity<Object> update(@RequestBody Indicator indicator) {
+        Indicator isExist = indicatorRepository.read(indicator.getId());
+
+        if(isExist == null)
+            return ResponseEntity.status(500).body("Failed to update the indicator, because the indicator does not exist!!!");
+
+        boolean successful = indicatorRepository.update(indicator);
+
+        if(!successful)
+            return ResponseEntity.status(500).body("Failed to update the indicator.");
+
+        return ResponseEntity.status(200).body("The indicator updated successfully");
+    }
+
+    @DeleteMapping("/{id}")
+    @ResponseBody
+    public ResponseEntity<Object> delete(@PathVariable UUID id) {
+        boolean successful = indicatorRepository.delete(id);
+
+        if(!successful)
+            return ResponseEntity.status(500).body("Failed to delete the indicator, because the indicator does not exist!!!");
+
+        return ResponseEntity.status(201).body("The indicator deleted successfully");
     }
 }