Merge pull request 'exchanges-new-case' (#46) from exchanges-new-case into master

Reviewed-on: http://git.plannaplan.pl/filipizydorczyk/backend/pulls/46

COPYING

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+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/philosophy/why-not-lgpl.html>.

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;
+    }
+
 }

buisnesslogic/src/test/java/com/plannaplan/models/ExportDataTest.java

@@ -0,0 +1,14 @@
+package com.plannaplan.models;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.Test;
+
+public class ExportDataTest {
+
+    @Test
+    public void shouldConvertDataToCSVRecord() {
+        final ExportData data = new ExportData("4234", "242352", "12");
+        assertTrue(data.convertToCSVRecord().equals("4234,242352,12"));
+    }
+}

restservice/pom.xml

@@ -62,6 +62,14 @@
       <version>4.5.10</version>
     </dependency>
 
+    <!-- https://mvnrepository.com/artifact/commons-io/commons-io -->
+    <dependency>
+      <groupId>commons-io</groupId>
+      <artifactId>commons-io</artifactId>
+      <version>2.5</version>
+    </dependency>
+
+
     <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-web</artifactId>

restservice/src/main/java/com/plannaplan/controllers/CommisionController.java

@@ -12,12 +12,15 @@ import io.swagger.annotations.ApiParam;
 import java.util.List;
 import java.util.Optional;
 
+import javax.servlet.http.HttpServletResponse;
+
 import com.plannaplan.App;
 import com.plannaplan.entities.Assignment;
 import com.plannaplan.entities.Commision;
 import com.plannaplan.entities.Groups;
 import com.plannaplan.entities.User;
 import com.plannaplan.exceptions.UserNotFoundException;
+import com.plannaplan.models.ExportData;
 import com.plannaplan.responses.mappers.CommisionResponseMappers;
 import com.plannaplan.responses.models.CommisionResponse;
 import com.plannaplan.services.AssignmentService;
@@ -27,6 +30,8 @@ import com.plannaplan.services.GroupService;
 import com.plannaplan.types.AppState;
 import com.plannaplan.types.UserRoles;
 
+import org.apache.commons.io.IOUtils;
+
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
@@ -37,11 +42,14 @@ import org.springframework.util.Assert;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
 
+import java.io.IOException;
+import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.Iterator;
 
 import com.plannaplan.responses.mappers.AssignmentResponseMappers;
+import com.plannaplan.responses.models.AssignmentDetailedResponse;
 import com.plannaplan.responses.models.AssignmentResponse;
 
 /**
@@ -161,6 +169,28 @@ public class CommisionController extends TokenBasedController {
                 }
 
                 return new ResponseEntity<>(result, HttpStatus.OK);
+
+        }
+
+        /**
+         * @return list of user latests assignmets
+         * @throws UserNotFoundException if user was not found bny token
+         */
+        @GetMapping("/user/assignments")
+        @ApiOperation("Return list of latest user commision assignments. User is recognized via token")
+        public ResponseEntity<List<AssignmentDetailedResponse>> getAllAssignmets() throws UserNotFoundException {
+                final User user = this.getCurrentUser().orElseThrow(() -> new NullPointerException());
+
+                final Optional<Commision> latestCommision = this.commisionService.getNewestCommision(user);
+
+                if (latestCommision.isEmpty()) {
+                        return new ResponseEntity<>(new ArrayList<>(), HttpStatus.OK);
+                }
+
+                final List<AssignmentDetailedResponse> response = AssignmentResponseMappers
+                                .mapAssignmetnToDetialedResponse(latestCommision.get().getAssignments());
+
+                return new ResponseEntity<>(response, HttpStatus.OK);
         }
 
         /**
@@ -236,4 +266,32 @@ public class CommisionController extends TokenBasedController {
                 return new ResponseEntity<>(new ArrayList<>(), HttpStatus.OK);
         }
 
+        /**
+         * @param response spring response to set headers
+         */
+        @GetMapping("/export/csv")
+        @PreAuthorize("hasRole('ROLE_ADMIN')")
+        @ApiOperation(value = "Export acceptes assignmetns as csv file to import to usos. You need to provide ADMIN token in order to get access to this data.")
+        public void getFile(HttpServletResponse response) {
+                try {
+                        String csvString = ExportData.getCSVHeader() + "\n";
+                        final Iterator<ExportData> it = this.commisionService.getExportData().iterator();
+                        while (it.hasNext()) {
+                                final ExportData data = it.next();
+                                csvString += (data.convertToCSVRecord() + "\n");
+                        }
+
+                        final InputStream is = IOUtils.toInputStream(csvString, "UTF-8");
+
+                        IOUtils.copy(is, response.getOutputStream());
+                        response.setContentType("application/csv");
+                        response.setHeader("Content-Disposition", "attachment; filename=\"export.csv\"");
+                        response.flushBuffer();
+                } catch (IOException ex) {
+
+                        throw new RuntimeException("IOError writing file to output stream");
+                }
+
+        }
+
 }

restservice/src/main/java/com/plannaplan/controllers/ExchangeController.java

@@ -88,6 +88,15 @@ public class ExchangeController extends TokenBasedController {
         final Assignment assignmentInstance = assignment.get();
         final Groups groupInstance = group.get();
 
+        if (assignmentInstance.getGroup().getCourseId() != null
+                && assignmentInstance.getGroup().getCourseId().getId() != groupInstance.getCourseId().getId()) {
+            return new ResponseEntity<>("You can performe exchange only within one course.", HttpStatus.BAD_REQUEST);
+        }
+
+        if (assignmentInstance.getGroup().getType() != groupInstance.getType()) {
+            return new ResponseEntity<>("You can't exchange lecture to class and otherwise.", HttpStatus.BAD_REQUEST);
+        }
+
         if (!(assignmentInstance.getCommision().getCommisionOwner().getId().equals(asker.getId())
                 && assignmentInstance.isAccepted())) {
             return new ResponseEntity<>(

restservice/src/main/java/com/plannaplan/responses/mappers/AssignmentResponseMappers.java

@@ -4,10 +4,13 @@ import java.util.List;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.Objects;
+import java.util.stream.Collectors;
 
 import com.plannaplan.entities.Assignment;
 import com.plannaplan.entities.Course;
 import com.plannaplan.entities.Groups;
+import com.plannaplan.responses.models.AssignmentDetailedResponse;
 import com.plannaplan.responses.models.AssignmentResponse;
 import com.plannaplan.types.GroupType;
 
@@ -69,4 +72,15 @@ public class AssignmentResponseMappers {
         }
         return response;
     }
+
+    /**
+     * map assignmetn to detailed response
+     * 
+     * @param assignments list of assignments to map
+     * @return list of responses
+     */
+    public static final List<AssignmentDetailedResponse> mapAssignmetnToDetialedResponse(List<Assignment> assignments) {
+        return assignments.stream().filter(Objects::nonNull).map(AssignmentDetailedResponse::new)
+                .collect(Collectors.toList());
+    }
 }

restservice/src/main/java/com/plannaplan/responses/models/AssignmentDetailedResponse.java

@@ -0,0 +1,71 @@
+package com.plannaplan.responses.models;
+
+import com.plannaplan.entities.Assignment;
+import com.plannaplan.entities.Groups;
+
+/**
+ * Assignment detailed response for api
+ */
+public class AssignmentDetailedResponse {
+    public Long id;
+    public String name;
+    private int day;
+    private String time;
+    private String endTime;
+    private String lecturer;
+
+    /**
+     * @param assignment Assignment instance to map
+     */
+    public AssignmentDetailedResponse(Assignment assignment) {
+        final Groups group = assignment.getGroup();
+        this.id = assignment.getId();
+        this.name = group.getCourseId().getName();
+        this.day = group.getDay().label;
+        this.time = group.getTimeString();
+        this.endTime = group.getEndTimeString();
+        this.lecturer = group.getLecturer().toString();
+    }
+
+    /**
+     * @return day as a value from 0-6
+     */
+    public int getDay() {
+        return day;
+    }
+
+    /**
+     * @return lecturer string fromated
+     */
+    public String getLecturer() {
+        return lecturer;
+    }
+
+    /**
+     * @return time formated string
+     */
+    public String getEndTime() {
+        return endTime;
+    }
+
+    /**
+     * @return time formated string
+     */
+    public String getTime() {
+        return time;
+    }
+
+    /**
+     * @return name of course that group belongs to
+     */
+    public String getName() {
+        return this.name;
+    }
+
+    /**
+     * @return db id of assignment
+     */
+    public Long getId() {
+        return this.id;
+    }
+}

restservice/src/test/java/com/plannaplan/controllers/CommisionControllerTest.java

@@ -18,6 +18,7 @@ import com.plannaplan.entities.User;
 import com.plannaplan.services.UserService;
 import com.plannaplan.types.UserRoles;
 
+import static org.junit.Assert.assertTrue;
 import static org.springframework.security.test.web.servlet.setup.SecurityMockMvcConfigurers.*;
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
@@ -31,11 +32,13 @@ public class CommisionControllerTest extends AbstractControllerTest {
     private UserService service;
 
     private static User user;
+    private static User admin;
     private static User otherUser;
     private static User asker;
     private static User otherAsker;
 
     private static final String TEST_COMMISIONS_STUDENT_EMAIL = "commisions.student@notexisting.domain";
+    private static final String TEST_COMMISIONS_ADMIN_EMAIL = "commisions.admin@notexisiting,domain";
     private static final String TEST_COMMISIONS_OTHER_STUDENT_EMAIL = "commisions.student2@notexisting.domain";
     private static final String TEST_COMMISIONS_DEANERY_EMAIL = "commisions.deanery@notexisting.domain";
     private static final String TEST_COMMISIONS_OTHER_DEANERY_EMAIL = "commisions.deanery2@notexisting.domain";
@@ -44,6 +47,9 @@ public class CommisionControllerTest extends AbstractControllerTest {
     private static final String GET_COMMISIONS_ENDPOINT = "/api/v1/commisions/user";
     private static final String GET_SOMEONE_COMMISIONS_ENDPOINT = "/api/v1/commisions/user";
     private static final String GET_USER_SCHEDULE_ENDPOINT = "/api/v1/commisions/user/schedule";
+    private static final String GET_ASSIGNMENTS_ENDPOINT = "/api/v1/commisions/user/assignments";
+
+    private static final String EXPORT_DATA = "/api/v1/commisions/export/csv";
 
     private static final MediaType APPLICATION_JSON_UTF8 = new MediaType(MediaType.APPLICATION_JSON.getType(),
             MediaType.APPLICATION_JSON.getSubtype(), Charset.forName("utf8"));
@@ -254,6 +260,10 @@ public class CommisionControllerTest extends AbstractControllerTest {
                     UserRoles.STUDENT);
             this.service.save(otherUser);
         }
+        if (CommisionControllerTest.admin == null) {
+            CommisionControllerTest.admin = new User(null, null, TEST_COMMISIONS_ADMIN_EMAIL, UserRoles.ADMIN);
+            this.service.save(admin);
+        }
         if (CommisionControllerTest.asker == null) {
             CommisionControllerTest.asker = new User(null, null, TEST_COMMISIONS_DEANERY_EMAIL, UserRoles.DEANERY);
             this.service.save(asker);
@@ -264,4 +274,50 @@ public class CommisionControllerTest extends AbstractControllerTest {
             this.service.save(otherAsker);
         }
     }
+
+    @Test
+    public void shouldExportData() throws Exception {
+        this.checkUsers();
+        final User admin = this.service.checkForUser(TEST_COMMISIONS_ADMIN_EMAIL, null);
+        final String token = this.service.login(admin).getToken();
+
+        MockMvc mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).apply(springSecurity()).build();
+        mockMvc.perform(get(EXPORT_DATA).header("Authorization", "Bearer " + token)).andExpect(status().isOk());
+    }
+
+    @Test
+    public void shouldNotExportDataDueToWrongPermision() throws Exception {
+        this.checkUsers();
+        final User student = this.service.checkForUser(TEST_COMMISIONS_STUDENT_EMAIL, null);
+        final String token = this.service.login(student).getToken();
+
+        MockMvc mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).apply(springSecurity()).build();
+        mockMvc.perform(get(EXPORT_DATA).header("Authorization", "Bearer " + token))
+                .andExpect(status().is4xxClientError());
+    }
+
+    @Test
+    public void shouldExportDataBeCsvFile() throws Exception {
+        this.checkUsers();
+        final User admin = this.service.checkForUser(TEST_COMMISIONS_ADMIN_EMAIL, null);
+        final String token = this.service.login(admin).getToken();
+
+        MockMvc mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).apply(springSecurity()).build();
+
+        assertTrue(
+                mockMvc.perform(get(EXPORT_DATA).header("Authorization", "Bearer " + token)).andExpect(status().isOk())
+                        .andReturn().getResponse().getContentAsString().contains("user_id, zaj_cykl_id, gr_nr"));
+    }
+
+    @Test
+    public void shouldRetrunOkForAssignmentEnpoint() throws Exception {
+        this.checkUsers();
+        final User admin = this.service.checkForUser(TEST_COMMISIONS_STUDENT_EMAIL, null);
+        final String token = this.service.login(admin).getToken();
+
+        MockMvc mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).apply(springSecurity()).build();
+
+        mockMvc.perform(get(GET_ASSIGNMENTS_ENDPOINT).header("Authorization", "Bearer " + token))
+                .andExpect(status().isOk());
+    }
 }

restservice/src/test/java/com/plannaplan/controllers/ExchangeControllerTest.java

@@ -22,11 +22,13 @@ import java.nio.charset.Charset;
 
 import com.plannaplan.entities.Assignment;
 import com.plannaplan.entities.Commision;
+import com.plannaplan.entities.Course;
 import com.plannaplan.entities.Exchange;
 import com.plannaplan.entities.Groups;
 import com.plannaplan.entities.User;
 import com.plannaplan.services.AssignmentService;
 import com.plannaplan.services.CommisionService;
+import com.plannaplan.services.CourseService;
 import com.plannaplan.services.ExchangeService;
 import com.plannaplan.services.GroupService;
 import com.plannaplan.services.UserService;
@@ -57,11 +59,14 @@ public class ExchangeControllerTest extends AbstractControllerTest {
     @Autowired
     private ExchangeService exchangeService;
 
+    @Autowired
+    private CourseService courseService;
+
     @Test
     @DirtiesContext(methodMode = MethodMode.BEFORE_METHOD)
     public void shouldGetAllUsersExchanges() throws Exception {
         final User user = this.userService.save(new User(null, null,
-        "shouldGetAllUsersExchanges@ExchangeController.test", "11111", UserRoles.STUDENT, 320));
+                "shouldGetAllUsersExchanges@ExchangeController.test", "11111", UserRoles.STUDENT, 320));
         final String token = this.userService.login(user).getToken();
         final Groups group = this.groupService.save(new Groups(215, "A2-2", null, 520, WeekDay.TUESDAY, null));
         final Groups groupDesired = this.groupService.save(new Groups(216, "A2-3", null, 530, WeekDay.MONDAY, null));
@@ -70,26 +75,27 @@ public class ExchangeControllerTest extends AbstractControllerTest {
         this.exchangeService.save(new Exchange(assignment, groupDesired));
 
         MockMvc mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).apply(springSecurity()).build();
-        mockMvc.perform(get(EXCHANGE_ENDPOINT + "/all").header("Authorization", "Bearer " +
-        token)).andExpect(status().isOk());
+        mockMvc.perform(get(EXCHANGE_ENDPOINT + "/all").header("Authorization", "Bearer " + token))
+                .andExpect(status().isOk());
     }
 
     @Test
     public void shouldFailGettingNotExistingExchange() throws Exception {
         final User user = this.userService.save(new User(null, null,
-                                "shouldFailGettingNotExistingExchange@ExchangeController.test", UserRoles.STUDENT));
+                "shouldFailGettingNotExistingExchange@ExchangeController.test", UserRoles.STUDENT));
 
         final String token = this.userService.login(user).getToken();
 
         MockMvc mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).apply(springSecurity()).build();
-        mockMvc.perform(get(EXCHANGE_ENDPOINT + "/" + user.getId()).header("Authorization", "Bearer " + token)).andExpect(status().isBadRequest());
+        mockMvc.perform(get(EXCHANGE_ENDPOINT + "/" + user.getId()).header("Authorization", "Bearer " + token))
+                .andExpect(status().isBadRequest());
     }
 
     @Test
     @DirtiesContext(methodMode = MethodMode.BEFORE_METHOD)
-    public void shouldGetSingleExchange() throws Exception{
-        final User user = this.userService.save(new User(null, null,
-                                "shouldGetSingleExchange@ExchangeController.test", "11111", UserRoles.STUDENT, 320));
+    public void shouldGetSingleExchange() throws Exception {
+        final User user = this.userService.save(new User(null, null, "shouldGetSingleExchange@ExchangeController.test",
+                "11111", UserRoles.STUDENT, 320));
         final String token = this.userService.login(user).getToken();
         final Groups group = this.groupService.save(new Groups(215, "A2-2", null, 520, WeekDay.TUESDAY, null));
         final Groups groupDesired = this.groupService.save(new Groups(216, "A2-3", null, 530, WeekDay.MONDAY, null));
@@ -98,14 +104,14 @@ public class ExchangeControllerTest extends AbstractControllerTest {
         final Exchange exchange = this.exchangeService.save(new Exchange(assignment, groupDesired));
 
         MockMvc mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).apply(springSecurity()).build();
-        mockMvc.perform(get(EXCHANGE_ENDPOINT + "/" + exchange.getId()).header("Authorization", "Bearer " +
-        token)).andExpect(status().isOk());
+        mockMvc.perform(get(EXCHANGE_ENDPOINT + "/" + exchange.getId()).header("Authorization", "Bearer " + token))
+                .andExpect(status().isOk());
     }
 
     @Test
-    public void shouldFailGettingExchangeDueToPermission() throws Exception{
+    public void shouldFailGettingExchangeDueToPermission() throws Exception {
         final User user = this.userService.save(new User(null, null,
-                                "shouldFailGettingExchangeDueToPermission@ExchangeController.test", "11111", UserRoles.STUDENT, 320));
+                "shouldFailGettingExchangeDueToPermission@ExchangeController.test", "11111", UserRoles.STUDENT, 320));
         final Groups group = this.groupService.save(new Groups(215, "A2-2", null, 520, WeekDay.TUESDAY, null));
         final Groups groupDesired = this.groupService.save(new Groups(216, "A2-3", null, 530, WeekDay.MONDAY, null));
         final Commision commision = this.commisionService.save(new Commision(user));
@@ -113,32 +119,33 @@ public class ExchangeControllerTest extends AbstractControllerTest {
         final Exchange exchange = this.exchangeService.save(new Exchange(assignment, groupDesired));
 
         final User user2 = this.userService.save(new User(null, null,
-                                "shouldFailGettingExchangeDueToPermission2@ExchangeController.test", "11112", UserRoles.STUDENT, 321));
+                "shouldFailGettingExchangeDueToPermission2@ExchangeController.test", "11112", UserRoles.STUDENT, 321));
         final String token2 = this.userService.login(user2).getToken();
 
         MockMvc mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).apply(springSecurity()).build();
-        mockMvc.perform(post(EXCHANGE_ENDPOINT + "/" + exchange.getId()).header("Authorization", "Bearer " +
-        token2)).andExpect(status().is4xxClientError());
+        mockMvc.perform(post(EXCHANGE_ENDPOINT + "/" + exchange.getId()).header("Authorization", "Bearer " + token2))
+                .andExpect(status().is4xxClientError());
     }
 
     @Test
-    public void shouldFailPostDueToAssignmentNotFound() throws Exception{
+    public void shouldFailPostDueToAssignmentNotFound() throws Exception {
         final User user = this.userService.save(new User(null, null,
-                                "shouldFailPostDueToAssignmentNotFound@ExchangeController.test", UserRoles.STUDENT));
+                "shouldFailPostDueToAssignmentNotFound@ExchangeController.test", UserRoles.STUDENT));
         final String token = this.userService.login(user).getToken();
         final Groups group = this.groupService.save(new Groups(212, "A2-1", null, 420, WeekDay.WEDNESDAY, null));
 
-        MockMvc mockMvc =
-        MockMvcBuilders.webAppContextSetup(webApplicationContext).apply(springSecurity()).build();
-        mockMvc.perform(post(EXCHANGE_ENDPOINT).header("Authorization", "Bearer " +
-        token).contentType(APPLICATION_JSON_UTF8).content("{\"assignment\": "+ user.getId() +", \"group\": "+ group.getId() +" }")).andExpect(status().isBadRequest());
+        MockMvc mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).apply(springSecurity()).build();
+        mockMvc.perform(
+                post(EXCHANGE_ENDPOINT).header("Authorization", "Bearer " + token).contentType(APPLICATION_JSON_UTF8)
+                        .content("{\"assignment\": " + user.getId() + ", \"group\": " + group.getId() + " }"))
+                .andExpect(status().isBadRequest());
     }
 
     @Test
     @DirtiesContext(methodMode = MethodMode.BEFORE_METHOD)
-    public void shouldInsertExchange() throws Exception{
-        final User user = this.userService.save(new User(null, null,
-                                "shouldInsertExchange@ExchangeController.test", "11111", UserRoles.STUDENT, 320));
+    public void shouldInsertExchange() throws Exception {
+        final User user = this.userService.save(
+                new User(null, null, "shouldInsertExchange@ExchangeController.test", "11111", UserRoles.STUDENT, 320));
         final String token = this.userService.login(user).getToken();
         final Groups group = this.groupService.save(new Groups(215, "A2-2", null, 520, WeekDay.TUESDAY, null));
         final Groups groupDesired = this.groupService.save(new Groups(216, "A2-3", null, 530, WeekDay.MONDAY, null));
@@ -148,49 +155,55 @@ public class ExchangeControllerTest extends AbstractControllerTest {
         this.assignmentService.callAcceptAlgorythm();
 
         MockMvc mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).apply(springSecurity()).build();
-        mockMvc.perform(post(EXCHANGE_ENDPOINT).header("Authorization", "Bearer " +
-        token).contentType(APPLICATION_JSON_UTF8).content("{\"assignment\": "+ assignment.getId() +", \"group\": "+ groupDesired.getId() +" }")).andExpect(status().isOk());
+        mockMvc.perform(post(EXCHANGE_ENDPOINT).header("Authorization", "Bearer " + token)
+                .contentType(APPLICATION_JSON_UTF8)
+                .content("{\"assignment\": " + assignment.getId() + ", \"group\": " + groupDesired.getId() + " }"))
+                .andExpect(status().isOk());
     }
 
     @Test
-    public void shouldFailInsertExchangeDueToMissingGroup() throws Exception{
+    public void shouldFailInsertExchangeDueToMissingGroup() throws Exception {
         final User user = this.userService.save(new User(null, null,
-                                "shouldFailInsertExchangeDueToMissingGroup@ExchangeController.test", UserRoles.STUDENT));
+                "shouldFailInsertExchangeDueToMissingGroup@ExchangeController.test", UserRoles.STUDENT));
         final String token = this.userService.login(user).getToken();
 
         MockMvc mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).apply(springSecurity()).build();
-        mockMvc.perform(post(EXCHANGE_ENDPOINT).header("Authorization", "Bearer " +
-        token).contentType(APPLICATION_JSON_UTF8).content("{\"assignment\": "+ user.getId() +" }")).andExpect(status().isBadRequest());
+        mockMvc.perform(post(EXCHANGE_ENDPOINT).header("Authorization", "Bearer " + token)
+                .contentType(APPLICATION_JSON_UTF8).content("{\"assignment\": " + user.getId() + " }"))
+                .andExpect(status().isBadRequest());
     }
 
     @Test
-    public void shouldFailInsertExchangeDueToMissingAssignment() throws Exception{
+    public void shouldFailInsertExchangeDueToMissingAssignment() throws Exception {
         final User user = this.userService.save(new User(null, null,
-                                "shouldFailInsertExchangeDueToMissingAssignment@ExchangeController.test", UserRoles.STUDENT));
+                "shouldFailInsertExchangeDueToMissingAssignment@ExchangeController.test", UserRoles.STUDENT));
         final String token = this.userService.login(user).getToken();
         final Groups group = this.groupService.save(new Groups(212, "A2-1", null, 420, WeekDay.WEDNESDAY, null));
 
         MockMvc mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).apply(springSecurity()).build();
-        mockMvc.perform(post(EXCHANGE_ENDPOINT).header("Authorization", "Bearer " +
-        token).contentType(APPLICATION_JSON_UTF8).content("{\"group\": "+ group.getId() +" }")).andExpect(status().isBadRequest());
+        mockMvc.perform(post(EXCHANGE_ENDPOINT).header("Authorization", "Bearer " + token)
+                .contentType(APPLICATION_JSON_UTF8).content("{\"group\": " + group.getId() + " }"))
+                .andExpect(status().isBadRequest());
     }
 
     @Test
-    public void shouldFailInsertExchangeDueToMissingParam() throws Exception{
+    public void shouldFailInsertExchangeDueToMissingParam() throws Exception {
         final User user = this.userService.save(new User(null, null,
-                                "shouldFailInsertExchangeDueToMissingParam@ExchangeController.test", UserRoles.STUDENT));
+                "shouldFailInsertExchangeDueToMissingParam@ExchangeController.test", UserRoles.STUDENT));
         final String token = this.userService.login(user).getToken();
 
         MockMvc mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).apply(springSecurity()).build();
-        mockMvc.perform(post(EXCHANGE_ENDPOINT).header("Authorization", "Bearer " +
-        token).contentType(APPLICATION_JSON_UTF8)).andExpect(status().isBadRequest());
+        mockMvc.perform(
+                post(EXCHANGE_ENDPOINT).header("Authorization", "Bearer " + token).contentType(APPLICATION_JSON_UTF8))
+                .andExpect(status().isBadRequest());
     }
 
     @Test
     @DirtiesContext(methodMode = MethodMode.BEFORE_METHOD)
-    public void shouldDenyExchangeDueToAssigmentOverlapping() throws Exception{
-        final User user = this.userService.save(new User(null, null,
-        "shouldDenyExchangeDueToAssigmentOverlapping@ExchangeController.test", "11111", UserRoles.STUDENT, 320));
+    public void shouldDenyExchangeDueToAssigmentOverlapping() throws Exception {
+        final User user = this.userService
+                .save(new User(null, null, "shouldDenyExchangeDueToAssigmentOverlapping@ExchangeController.test",
+                        "11111", UserRoles.STUDENT, 320));
         final String token = this.userService.login(user).getToken();
         final Groups group = this.groupService.save(new Groups(215, "A2-2", null, 520, WeekDay.TUESDAY, null));
         final Commision commision = this.commisionService.save(new Commision(user));
@@ -198,30 +211,34 @@ public class ExchangeControllerTest extends AbstractControllerTest {
         this.exchangeService.save(new Exchange(assignment, group));
 
         MockMvc mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).apply(springSecurity()).build();
-        mockMvc.perform(post(EXCHANGE_ENDPOINT).header("Authorization", "Bearer " +
-        token).contentType(APPLICATION_JSON_UTF8).content("{\"assignment\": "+ user.getId() +", \"group\": "+ group.getId() +" }")).andExpect(status().isBadRequest());
+        mockMvc.perform(
+                post(EXCHANGE_ENDPOINT).header("Authorization", "Bearer " + token).contentType(APPLICATION_JSON_UTF8)
+                        .content("{\"assignment\": " + user.getId() + ", \"group\": " + group.getId() + " }"))
+                .andExpect(status().isBadRequest());
     }
 
     @Test
-    public void shouldDenyPostDueToAssignmentNotAccepted() throws Exception{
+    public void shouldDenyPostDueToAssignmentNotAccepted() throws Exception {
         final User user = this.userService.save(new User(null, null,
-                                "shouldDenyPostDueToAssignmentNotAccepted@ExchangeController.test", UserRoles.STUDENT));
+                "shouldDenyPostDueToAssignmentNotAccepted@ExchangeController.test", UserRoles.STUDENT));
         final String token = this.userService.login(user).getToken();
         final Groups group = this.groupService.save(new Groups(212, "A2-1", null, 420, WeekDay.WEDNESDAY, null));
         final Groups group2 = this.groupService.save(new Groups(213, "A2-2", null, 420, WeekDay.MONDAY, null));
-        final Commision commision =  this.commisionService.save(new Commision(user));
-        final Assignment assignment = this.assignmentService.save(new Assignment(group,commision));
+        final Commision commision = this.commisionService.save(new Commision(user));
+        final Assignment assignment = this.assignmentService.save(new Assignment(group, commision));
 
         MockMvc mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).apply(springSecurity()).build();
-        mockMvc.perform(post(EXCHANGE_ENDPOINT).header("Authorization", "Bearer " +
-        token).contentType(APPLICATION_JSON_UTF8).content("{\"assignment\": "+ assignment.getId() +", \"group\": "+ group2.getId() +" }")).andExpect(status().isBadRequest());
+        mockMvc.perform(
+                post(EXCHANGE_ENDPOINT).header("Authorization", "Bearer " + token).contentType(APPLICATION_JSON_UTF8)
+                        .content("{\"assignment\": " + assignment.getId() + ", \"group\": " + group2.getId() + " }"))
+                .andExpect(status().isBadRequest());
     }
 
     @Test
     @DirtiesContext(methodMode = MethodMode.BEFORE_METHOD)
-    public void shouldDeleteExchange() throws Exception{
-        final User user = this.userService.save(new User(null, null,
-                                "shouldDeleteExchange@ExchangeController.test", "11111", UserRoles.STUDENT, 320));
+    public void shouldDeleteExchange() throws Exception {
+        final User user = this.userService.save(
+                new User(null, null, "shouldDeleteExchange@ExchangeController.test", "11111", UserRoles.STUDENT, 320));
         final String token = this.userService.login(user).getToken();
         final Groups group = this.groupService.save(new Groups(215, "A2-2", null, 520, WeekDay.TUESDAY, null));
         final Groups groupDesired = this.groupService.save(new Groups(216, "A2-3", null, 530, WeekDay.MONDAY, null));
@@ -230,14 +247,14 @@ public class ExchangeControllerTest extends AbstractControllerTest {
         final Exchange exchange = this.exchangeService.save(new Exchange(assignment, groupDesired));
 
         MockMvc mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).apply(springSecurity()).build();
-        mockMvc.perform(delete(EXCHANGE_ENDPOINT + "/" + exchange.getId()).header("Authorization", "Bearer " +
-        token)).andExpect(status().isOk());
+        mockMvc.perform(delete(EXCHANGE_ENDPOINT + "/" + exchange.getId()).header("Authorization", "Bearer " + token))
+                .andExpect(status().isOk());
     }
 
     @Test
-    public void shouldFailDeleteDueToWrongPermissions() throws Exception{
+    public void shouldFailDeleteDueToWrongPermissions() throws Exception {
         final User user = this.userService.save(new User(null, null,
-                                "shouldFailDeleteDueToWrongPermissions@ExchangeController.test", "11111", UserRoles.STUDENT, 320));
+                "shouldFailDeleteDueToWrongPermissions@ExchangeController.test", "11111", UserRoles.STUDENT, 320));
         final Groups group = this.groupService.save(new Groups(215, "A2-2", null, 520, WeekDay.TUESDAY, null));
         final Groups groupDesired = this.groupService.save(new Groups(216, "A2-3", null, 530, WeekDay.MONDAY, null));
         final Commision commision = this.commisionService.save(new Commision(user));
@@ -245,39 +262,41 @@ public class ExchangeControllerTest extends AbstractControllerTest {
         final Exchange exchange = this.exchangeService.save(new Exchange(assignment, groupDesired));
 
         final User user2 = this.userService.save(new User(null, null,
-        "shouldFailDeleteDueToWrongPermissions@ExchangeController2.test", "11112", UserRoles.STUDENT, 322));
+                "shouldFailDeleteDueToWrongPermissions@ExchangeController2.test", "11112", UserRoles.STUDENT, 322));
         final String token2 = this.userService.login(user2).getToken();
 
         MockMvc mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).apply(springSecurity()).build();
-        mockMvc.perform(get(EXCHANGE_ENDPOINT + "/" + exchange.getId()).header("Authorization", "Bearer " +
-        token2)).andExpect(status().isBadRequest());
+        mockMvc.perform(get(EXCHANGE_ENDPOINT + "/" + exchange.getId()).header("Authorization", "Bearer " + token2))
+                .andExpect(status().isBadRequest());
     }
 
     @Test
-    public void shouldFailDeleteDueToMissingParam() throws Exception{
-        final User user = this.userService.save(new User(null, null,
-        "shouldFailDeleteDueToMissingParam@ExchangeController.test", UserRoles.STUDENT));
+    public void shouldFailDeleteDueToMissingParam() throws Exception {
+        final User user = this.userService.save(
+                new User(null, null, "shouldFailDeleteDueToMissingParam@ExchangeController.test", UserRoles.STUDENT));
         final String token = this.userService.login(user).getToken();
 
         MockMvc mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).apply(springSecurity()).build();
-        mockMvc.perform(delete(EXCHANGE_ENDPOINT).header("Authorization", "Bearer " + token)).andExpect(status().is4xxClientError());
+        mockMvc.perform(delete(EXCHANGE_ENDPOINT).header("Authorization", "Bearer " + token))
+                .andExpect(status().is4xxClientError());
     }
 
     @Test
-    public void shouldFailDeleteDueToExchangeNotFound() throws Exception{
+    public void shouldFailDeleteDueToExchangeNotFound() throws Exception {
         final User user = this.userService.save(new User(null, null,
-                                "shouldFailDeleteDueToExchangeNotFound@ExchangeController.test", UserRoles.STUDENT));
+                "shouldFailDeleteDueToExchangeNotFound@ExchangeController.test", UserRoles.STUDENT));
         final String token = this.userService.login(user).getToken();
 
         MockMvc mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).apply(springSecurity()).build();
-        mockMvc.perform(delete(EXCHANGE_ENDPOINT + "/" + user.getId()).header("Authorization", "Bearer " +
-        token)).andExpect(status().isBadRequest());
+        mockMvc.perform(delete(EXCHANGE_ENDPOINT + "/" + user.getId()).header("Authorization", "Bearer " + token))
+                .andExpect(status().isBadRequest());
     }
 
     @Test
     @DirtiesContext(methodMode = MethodMode.BEFORE_METHOD)
-    public void shouldFailPostDueToGroupAlreadyAccepted() throws Exception{
-        final User user = this.userService.save(new User(null, null, "shouldFailPostDueToGroupAlreadyAccepted@ExchangeController.test", "11111", UserRoles.STUDENT, 320));
+    public void shouldFailPostDueToGroupAlreadyAccepted() throws Exception {
+        final User user = this.userService.save(new User(null, null,
+                "shouldFailPostDueToGroupAlreadyAccepted@ExchangeController.test", "11111", UserRoles.STUDENT, 320));
         final String token = this.userService.login(user).getToken();
         final Groups group = this.groupService.save(new Groups(215, "A2-2", null, 520, WeekDay.TUESDAY, null));
         final Groups group2 = this.groupService.save(new Groups(216, "A2-3", null, 530, WeekDay.MONDAY, null));
@@ -288,7 +307,55 @@ public class ExchangeControllerTest extends AbstractControllerTest {
         this.exchangeService.save(new Exchange(assignment, group2));
 
         MockMvc mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).apply(springSecurity()).build();
-        mockMvc.perform(post(EXCHANGE_ENDPOINT).header("Authorization", "Bearer " +
-        token).contentType(APPLICATION_JSON_UTF8).content("{\"assignment\": "+ assignment.getId() +", \"group\": "+ group2.getId() +" }")).andExpect(status().isBadRequest());
+        mockMvc.perform(
+                post(EXCHANGE_ENDPOINT).header("Authorization", "Bearer " + token).contentType(APPLICATION_JSON_UTF8)
+                        .content("{\"assignment\": " + assignment.getId() + ", \"group\": " + group2.getId() + " }"))
+                .andExpect(status().isBadRequest());
+    }
+
+    @Test
+    @DirtiesContext(methodMode = MethodMode.BEFORE_METHOD)
+    public void shouldFailForDiffrentCoursesExchange() throws Exception {
+        final User user = this.userService.save(
+                new User(null, null, "shouldInsertExchange@ExchangeController.test", "11111", UserRoles.STUDENT, 320));
+        final String token = this.userService.login(user).getToken();
+        final Course course = this.courseService
+                .save(new Course("shouldFailForDiffrentCoursesExchangeCourse", "SFFDCEC"));
+        final Course course2 = this.courseService
+                .save(new Course("shouldFailForDiffrentCoursesExchangeCourse2", "SFFDCEC-2"));
+        final Groups group = this.groupService.save(new Groups(215, "A2-2", course, 520, WeekDay.TUESDAY, null));
+        final Groups groupDesired = this.groupService.save(new Groups(216, "A2-3", course2, 530, WeekDay.MONDAY, null));
+        final Commision commision = this.commisionService.save(new Commision(user));
+        final Assignment assignment = this.assignmentService.save(new Assignment(group, commision));
+
+        this.assignmentService.callAcceptAlgorythm();
+
+        MockMvc mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).apply(springSecurity()).build();
+        mockMvc.perform(post(EXCHANGE_ENDPOINT).header("Authorization", "Bearer " + token)
+                .contentType(APPLICATION_JSON_UTF8)
+                .content("{\"assignment\": " + assignment.getId() + ", \"group\": " + groupDesired.getId() + " }"))
+                .andExpect(status().isBadRequest());
+    }
+
+    @Test
+    @DirtiesContext(methodMode = MethodMode.BEFORE_METHOD)
+    public void shouldFailForDiffrentGroupTypesExchange() throws Exception {
+        final User user = this.userService.save(
+                new User(null, null, "shouldInsertExchange@ExchangeController.test", "11111", UserRoles.STUDENT, 320));
+        final String token = this.userService.login(user).getToken();
+        final Course course = this.courseService
+                .save(new Course("shouldFailForDiffrentCoursesExchangeCourse", "SFFDCEC"));
+        final Groups group = this.groupService.save(new Groups(12, "A2-2", course, 520, WeekDay.TUESDAY, null));
+        final Groups groupDesired = this.groupService.save(new Groups(216, "A2-3", course, 530, WeekDay.MONDAY, null));
+        final Commision commision = this.commisionService.save(new Commision(user));
+        final Assignment assignment = this.assignmentService.save(new Assignment(group, commision));
+
+        this.assignmentService.callAcceptAlgorythm();
+
+        MockMvc mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).apply(springSecurity()).build();
+        mockMvc.perform(post(EXCHANGE_ENDPOINT).header("Authorization", "Bearer " + token)
+                .contentType(APPLICATION_JSON_UTF8)
+                .content("{\"assignment\": " + assignment.getId() + ", \"group\": " + groupDesired.getId() + " }"))
+                .andExpect(status().isBadRequest());
     }
 }