3321 PO Sort reviewer candidates

core/src/main/java/se/su/dsv/scipro/reviewing/ReviewerCandidates.java

@@ -21,5 +21,8 @@ public record ReviewerCandidates(
         List<Candidate> unavailable)
 {
     public record Candidate(User reviewer, int target, int assigned, String note) {
+        public int remainingTargets() {
+            return target - assigned;
+        }
     }
 }

core/src/main/java/se/su/dsv/scipro/reviewing/ReviewerCapacityServiceImpl.java

@@ -174,6 +174,23 @@ class ReviewerCapacityServiceImpl implements ReviewerCapacityService, ReviewerAs
             }
         }
 
+        Comparator<ReviewerCandidates.Candidate> byLastName = Comparator.comparing(
+                ReviewerCandidates.Candidate::reviewer,
+                Comparator.comparing(User::getLastName));
+        Comparator<ReviewerCandidates.Candidate> byNumberOfResearchAreas = Comparator.comparing(
+                candidate -> candidate.reviewer().getResearchAreas().size());
+        Comparator<ReviewerCandidates.Candidate> byRemainingTargets = Comparator.comparing(
+                ReviewerCandidates.Candidate::remainingTargets);
+
+        good.sort(byRemainingTargets.reversed()
+                .thenComparing(byNumberOfResearchAreas)
+                .thenComparing(byLastName));
+        wrongResearchArea.sort(byRemainingTargets.reversed()
+                .thenComparing(byLastName));
+        busy.sort(byLastName);
+        unavailable.sort(byLastName);
+        wrongLanguage.sort(byLastName);
+
         ReviewPeriod reviewPeriod = !date.isAfter(endOfSpring(date.getYear()))
                 ? new ReviewPeriod(Year.of(date.getYear()), ReviewPeriod.Part.SPRING)
                 : new ReviewPeriod(Year.of(date.getYear()), ReviewPeriod.Part.AUTUMN);