Export csv data

buisnesslogic/src/main/java/com/plannaplan/models/ExportData.java

@@ -0,0 +1,86 @@
+package com.plannaplan.models;
+
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+/**
+ * Container to keep data to export
+ */
+public class ExportData {
+
+    private static final String GROUP_FIELD = "gr_nr";
+    private static final String USER_FIELD = "user_id";
+    private static final String CYKL_FIELD = "zaj_cykl_id";
+
+    private String userId;
+    private String zajCyklId;
+    private String grNr;
+
+    /**
+     * @param userId    usosid
+     * @param zajCyklId course cycle
+     * @param grNr      group number
+     */
+    public ExportData(String userId, String zajCyklId, String grNr) {
+        this.setUserId(userId);
+        this.setZajCyklId(zajCyklId);
+        this.setGrNr(grNr);
+    }
+
+    /**
+     * @return group number
+     */
+    public String getGrNr() {
+        return grNr;
+    }
+
+    /**
+     * @param grNr group number
+     */
+    public void setGrNr(String grNr) {
+        this.grNr = grNr;
+    }
+
+    /**
+     * @return course cycle
+     */
+    public String getZajCyklId() {
+        return zajCyklId;
+    }
+
+    /**
+     * @param zajCyklId course cycle
+     */
+    public void setZajCyklId(String zajCyklId) {
+        this.zajCyklId = zajCyklId;
+    }
+
+    /**
+     * @return usosid
+     */
+    public String getUserId() {
+        return userId;
+    }
+
+    /**
+     * @param userId usosid
+     */
+    public void setUserId(String userId) {
+        this.userId = userId;
+    }
+
+    /**
+     * @return csv fromated line
+     */
+    public String convertToCSVRecord() {
+        return Stream.of(this.userId, this.zajCyklId, this.grNr).collect(Collectors.joining(","));
+    }
+
+    /**
+     * @return csv formated first line
+     */
+    public static String getCSVHeader() {
+        return USER_FIELD + ", " + CYKL_FIELD + ", " + GROUP_FIELD;
+    }
+
+}

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

@@ -1,10 +1,12 @@
 package com.plannaplan.services;
 
+import java.util.ArrayList;
 import java.util.List;
 import java.util.Optional;
 
 import com.plannaplan.entities.Commision;
 import com.plannaplan.entities.User;
+import com.plannaplan.models.ExportData;
 import com.plannaplan.repositories.AssignmentRepository;
 import com.plannaplan.repositories.CommisionRepository;
 
@@ -22,6 +24,8 @@ public class CommisionService {
     private CommisionRepository repo;
     @Autowired
     private AssignmentRepository aRepository;
+    @Autowired
+    private UserService userService;
 
     public CommisionService() {
     }
@@ -77,4 +81,21 @@ public class CommisionService {
     public long getCommisionsAmmount() {
         return this.repo.count();
     }
+
+    /**
+     * @return list of ExportData inmstancces keeping data to exprt to file
+     */
+    public List<ExportData> getExportData() {
+        final List<ExportData> response = new ArrayList<>();
+
+        this.userService.getAllStudents().forEach(student -> {
+            student.getStudentRegisteredGrups().forEach(group -> {
+                response.add(new ExportData(student.getUsosId(), Integer.toString(group.getZajCykId()),
+                        Integer.toString(group.getGrNr())));
+            });
+        });
+
+        return response;
+    }
+
 }