Added getting sorted students

buisnesslogic/src/main/java/com/plannaplan/services/AssignmentService.java

@@ -5,13 +5,15 @@ import java.util.Optional;
 
 import com.plannaplan.entities.Assignment;
 import com.plannaplan.entities.Commision;
+import com.plannaplan.entities.User;
 import com.plannaplan.repositories.AssignmentRepository;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
 /**
- *  Service of Assignment which can save assignments, diplay assignments, get ammount of assigments.
+ * Service of Assignment which can save assignments, diplay assignments, get
+ * ammount of assigments.
  */
 
 @Service
@@ -19,11 +21,15 @@ public class AssignmentService {
     @Autowired
     private AssignmentRepository repo;
 
+    @Autowired
+    private UserService userService;
+
     public AssignmentService() {
     }
 
     /**
      * Save given assignment
+     * 
      * @param assignment assignment to save
      * @return assignment saved assignment with database id
      */
@@ -32,16 +38,14 @@ public class AssignmentService {
     }
 
     /*
-     * getCommisionAssignments
-     * Return id of the commision
+     * getCommisionAssignments Return id of the commision
      */
     public List<Assignment> getCommisionAssignments(Commision com) {
         return this.repo.getByCommision(com.getId());
     }
 
     /*
-     * getAssignmentsAmmount
-     * Return count assignments ammount
+     * getAssignmentsAmmount Return count assignments ammount
      */
     public long getAssignmentsAmmount() {
         return this.repo.count();
@@ -49,10 +53,19 @@ public class AssignmentService {
 
     /**
      * Get assigmnent by id
+     * 
      * @param id id of assigmnent
      * @return Optional of assignment
      */
     public Optional<Assignment> getById(Long id) {
         return this.repo.findById(id);
     }
+
+    public void callAcceptAlgorythm() {
+        final List<User> students = this.userService.getStudentsSortedByRanking();
+
+        students.forEach(e -> {
+            System.out.println(e.getRanking());
+        });
+    }
 }

buisnesslogic/src/main/java/com/plannaplan/services/UserService.java

@@ -3,6 +3,7 @@ package com.plannaplan.services;
 import java.util.List;
 import java.util.Optional;
 import java.util.UUID;
+import java.util.stream.Collectors;
 
 import com.plannaplan.entities.User;
 import com.plannaplan.exceptions.UserNotFoundException;
@@ -153,4 +154,15 @@ public class UserService {
         return this.repo.getAllByRole(UserRoles.ADMIN).size() > 0;
     }
 
+    /**
+     * get students sorted by their ranking
+     * 
+     * @return list of students
+     */
+    public List<User> getStudentsSortedByRanking() {
+        return this.repo.getAllByRole(UserRoles.STUDENT).stream().sorted((u1, u2) -> {
+            return -1 * u1.getRanking().compareTo(u2.getRanking());
+        }).collect(Collectors.toList());
+    }
+
 }