core/src/main/java/se/su/dsv/scipro/CoreConfig.java

@@ -436,14 +436,18 @@ public class CoreConfig {
         FinalSeminarOppositionGrading finalSeminarOppositionGrading,
         EventBus eventBus,
         FinalSeminarOppositionRepo finalSeminarOppositionRepository,
-        Clock clock
+        Clock clock,
+        FinalSeminarSettingsService finalSeminarSettingsService,
+        DaysService daysService
     ) {
         return new FinalSeminarOppositionServiceImpl(
             em,
             finalSeminarOppositionGrading,
             eventBus,
             finalSeminarOppositionRepository,
-            clock
+            clock,
+            finalSeminarSettingsService,
+            daysService
         );
     }
 

core/src/main/java/se/su/dsv/scipro/finalseminar/FinalSeminarOppositionService.java

@@ -1,5 +1,6 @@
 package se.su.dsv.scipro.finalseminar;
 
+import java.time.Instant;
 import se.su.dsv.scipro.system.GenericService;
 
 public interface FinalSeminarOppositionService extends GenericService<FinalSeminarOpposition, Long> {
@@ -11,5 +12,8 @@ public interface FinalSeminarOppositionService extends GenericService<FinalSemin
     FinalSeminarOpposition gradeOpponent(FinalSeminarOpposition opposition, int points, String feedback)
         throws PointNotValidException;
 
-    void requestImprovements(FinalSeminarOpposition opposition, String supervisorComment);
+    /**
+     * @return the deadline by which the improvements must have been submitted
+     */
+    Instant requestImprovements(FinalSeminarOpposition opposition, String supervisorComment);
 }

core/src/main/java/se/su/dsv/scipro/finalseminar/FinalSeminarOppositionServiceImpl.java

@@ -6,7 +6,9 @@ import jakarta.inject.Provider;
 import jakarta.persistence.EntityManager;
 import jakarta.transaction.Transactional;
 import java.time.Clock;
+import java.time.Instant;
 import java.util.List;
+import se.su.dsv.scipro.misc.DaysService;
 import se.su.dsv.scipro.report.OppositionReport;
 import se.su.dsv.scipro.system.AbstractServiceImpl;
 
@@ -18,6 +20,8 @@ public class FinalSeminarOppositionServiceImpl
     private final EventBus eventBus;
     private final FinalSeminarOppositionRepo finalSeminarOppositionRepository;
     private final Clock clock;
+    private final FinalSeminarSettingsService finalSeminarSettingsService;
+    private final DaysService daysService;
 
     @Inject
     public FinalSeminarOppositionServiceImpl(
@@ -25,13 +29,17 @@ public class FinalSeminarOppositionServiceImpl
         FinalSeminarOppositionGrading finalSeminarOppositionGrading,
         EventBus eventBus,
         FinalSeminarOppositionRepo finalSeminarOppositionRepository,
-        Clock clock
+        Clock clock,
+        FinalSeminarSettingsService finalSeminarSettingsService,
+        DaysService daysService
     ) {
         super(em, FinalSeminarOpposition.class, QFinalSeminarOpposition.finalSeminarOpposition);
         this.finalSeminarOppositionGrading = finalSeminarOppositionGrading;
         this.eventBus = eventBus;
         this.finalSeminarOppositionRepository = finalSeminarOppositionRepository;
         this.clock = clock;
+        this.finalSeminarSettingsService = finalSeminarSettingsService;
+        this.daysService = daysService;
     }
 
     @Override
@@ -67,13 +75,24 @@ public class FinalSeminarOppositionServiceImpl
 
     @Override
     @Transactional
-    public void requestImprovements(FinalSeminarOpposition opposition, String supervisorComment) {
+    public Instant requestImprovements(FinalSeminarOpposition opposition, String supervisorComment) {
         OppositionReport oppositionReport = opposition.getOppositionReport();
         if (oppositionReport == null) {
-            return;
+            throw new IllegalStateException("There is no opposition report submitted");
         }
+
+        FinalSeminarSettings finalSeminarSettings = finalSeminarSettingsService.getInstance();
+
+        Instant now = clock.instant();
+        Instant deadline = daysService.workDaysAfter(
+            now,
+            finalSeminarSettings.getWorkDaysToFixRequestedImprovementsToOppositionReport()
+        );
+
         oppositionReport.setSubmitted(false);
-        opposition.setImprovementsRequestedAt(clock.instant());
+        opposition.setImprovementsRequestedAt(now);
         opposition.setSupervisorCommentForImprovements(supervisorComment);
+
+        return deadline;
     }
 }

core/src/main/java/se/su/dsv/scipro/finalseminar/FinalSeminarSettings.java

@@ -34,6 +34,9 @@ public class FinalSeminarSettings extends DomainObject {
     @Column(name = "days_ahead_to_upload_thesis", nullable = false)
     private int daysAheadToUploadThesis = DEFAULT_DAYS_AHEAD_TO_UPLOAD_THESIS;
 
+    @Column(name = "work_days_to_fix_requested_improvements_to_opposition_report", nullable = false)
+    private int workDaysToFixRequestedImprovementsToOppositionReport = 10;
+
     @Column(name = "thesis_must_be_pdf", nullable = false)
     private boolean thesisMustBePDF = false;
 
@@ -113,6 +116,17 @@ public class FinalSeminarSettings extends DomainObject {
         this.oppositionPriorityDays = oppositionPriorityDays;
     }
 
+    public int getWorkDaysToFixRequestedImprovementsToOppositionReport() {
+        return workDaysToFixRequestedImprovementsToOppositionReport;
+    }
+
+    public void setWorkDaysToFixRequestedImprovementsToOppositionReport(
+        int workDaysToFixRequestedImprovementsToOppositionReport
+    ) {
+        this.workDaysToFixRequestedImprovementsToOppositionReport =
+            workDaysToFixRequestedImprovementsToOppositionReport;
+    }
+
     @Override
     public String toString() {
         return (

core/src/main/java/se/su/dsv/scipro/misc/DaysService.java

@@ -1,6 +1,9 @@
 package se.su.dsv.scipro.misc;
 
+import java.time.Instant;
 import java.time.LocalDate;
+import java.time.ZoneId;
+import java.time.ZonedDateTime;
 import java.util.Date;
 
 public interface DaysService {
@@ -9,4 +12,11 @@ public interface DaysService {
     int workDaysBetween(Date startDate, Date endDate);
     LocalDate workDaysAhead(LocalDate date, int days);
     LocalDate workDaysAfter(LocalDate date, int days);
+
+    default Instant workDaysAfter(Instant instant, int days) {
+        ZonedDateTime zonedDateTime = instant.atZone(ZoneId.systemDefault());
+        LocalDate localDate = zonedDateTime.toLocalDate();
+        LocalDate newDate = workDaysAfter(localDate, days);
+        return newDate.atTime(zonedDateTime.toLocalTime()).atZone(ZoneId.systemDefault()).toInstant();
+    }
 }

core/src/main/resources/db/migration/V6__final_seminar_work_days_to_fix_opposition_report.sql

@@ -0,0 +1,2 @@
+ALTER TABLE `final_seminar_settings`
+    ADD COLUMN `work_days_to_fix_requested_improvements_to_opposition_report` INT(11) NOT NULL DEFAULT 10;

view/src/main/java/se/su/dsv/scipro/finalseminar/AdminFinalSeminarSettingsPage.html

@@ -42,6 +42,13 @@
             </div>
         </div>
 
+        <div class="mb-3">
+            <label class="col-lg-4">How many work days opponents have to resubmit their report</label>
+            <div class="col-lg-1">
+                <input class="form-control" type="text" wicket:id="work_days_to_fix_requested_improvements_to_opposition_report" />
+            </div>
+        </div>
+
 		<div class="mb-3">
             <div class="col-lg-offset-4 col-lg-4">
                 <div class="form-check">

view/src/main/java/se/su/dsv/scipro/finalseminar/AdminFinalSeminarSettingsPage.java

@@ -131,6 +131,17 @@ public class AdminFinalSeminarSettingsPage extends AbstractAdminSystemPage {
                     Integer.class
                 )
             );
+            add(
+                new RequiredTextField<>(
+                    "work_days_to_fix_requested_improvements_to_opposition_report",
+                    LambdaModel.of(
+                        model,
+                        FinalSeminarSettings::getWorkDaysToFixRequestedImprovementsToOppositionReport,
+                        FinalSeminarSettings::setWorkDaysToFixRequestedImprovementsToOppositionReport
+                    ),
+                    Integer.class
+                )
+            );
             add(
                 new CheckBox(
                     SEMINAR_PDF,

view/src/main/java/se/su/dsv/scipro/finalseminar/SeminarOppositionPanel.java

@@ -2,7 +2,7 @@ package se.su.dsv.scipro.finalseminar;
 
 import com.google.common.eventbus.EventBus;
 import jakarta.inject.Inject;
-import java.time.Duration;
+import java.time.Instant;
 import java.time.ZoneId;
 import java.time.ZonedDateTime;
 import java.util.Date;
@@ -360,19 +360,16 @@ public class SeminarOppositionPanel extends Panel {
 
         @Override
         protected void onSubmit() {
-            // TODO: return deadline
+            Instant deadline = finalSeminarOppositionService.requestImprovements(
-            finalSeminarOppositionService.requestImprovements(getModelObject(), feedbackToOpponentModel.getObject());
+                getModelObject(),
+                feedbackToOpponentModel.getObject()
+            );
 
             record ImprovementFeedback(String fullName, ZonedDateTime deadline) {}
-            ZonedDateTime deadline = getModelObject()
+            ZonedDateTime localDeadline = deadline.atZone(ZoneId.systemDefault());
-                .getFinalSeminar()
-                .getStartDate()
-                .toInstant()
-                .plus(Duration.ofDays(10))
-                .atZone(ZoneId.of("Europe/Stockholm"));
             success(
                 getString("feedback.opponent.requested.improvements", () ->
-                    new ImprovementFeedback(getModelObject().getUser().getFullName(), deadline)
+                    new ImprovementFeedback(getModelObject().getUser().getFullName(), localDeadline)
                 )
             );
         }