#117 add scopus papers filter

src/main/java/ru/ulstu/grant/service/GrantService.java

@@ -20,6 +20,7 @@ import ru.ulstu.user.service.UserService;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collections;
 import java.util.Date;
 import java.util.List;
 
@@ -162,10 +163,15 @@ public class GrantService {
         if (grantDto.isHasBAKPapers()) {
             filteredUsers = filteredUsers
                     .stream()
-                    .filter(getCompletedBAKPapersAuthors()::contains)
+                    .filter(getBAKAuthors()::contains)
+                    .collect(toList());
+        }
+        if (grantDto.isHasScopusPapers()) {
+            filteredUsers = filteredUsers
+                    .stream()
+                    .filter(getScopusAuthors()::contains)
                     .collect(toList());
         }
-
         return filteredUsers;
     }
 
@@ -201,22 +207,36 @@ public class GrantService {
         grantDto.getDeadlines().remove((int) deadlineId);
     }
 
-    private List<User> getCompletedBAKPapersAuthors() {
-        List<Paper> papers = paperService.findCompletedVAKPapers()
-                .stream()
+    private List<User> getCompletedPapersAuthors(Paper.PaperType type) {
+        List<Paper> papers = paperService.findAllCompletedByType(type);
+        papers.stream()
                 .filter(paper -> paper.getAuthors() != null)
                 .collect(toList());
-
         List<User> users = new ArrayList<>();
         for (Paper p : papers) {
             p.getAuthors()
                     .stream()
                     .forEach(users::add);
         }
+        return users;
+    }
 
-        return users
+    private List<User> getBAKAuthors() {
+        return getCompletedPapersAuthors(Paper.PaperType.VAK)
                 .stream()
                 .distinct()
                 .collect(toList());
     }
+
+    private List<User> getScopusAuthors() {
+        List<User> oldAuthors = getCompletedPapersAuthors(Paper.PaperType.SCOPUS);
+        List<User> newAuthors = new ArrayList<>();
+        oldAuthors.forEach(author -> {
+            int count = Collections.frequency(oldAuthors, author);
+            if (count > 3) {
+                newAuthors.add(author);
+            }
+        });
+        return newAuthors;
+    }
 }

src/main/java/ru/ulstu/paper/service/PaperService.java

@@ -273,8 +273,8 @@ public class PaperService {
                 .collect(Collectors.joining(", "));
     }
 
-    public List<Paper> findCompletedVAKPapers() {
-        return paperRepository.findByType(Paper.PaperType.VAK)
+    public List<Paper> findAllCompletedByType(Paper.PaperType type) {
+        return paperRepository.findByType(type)
                 .stream()
                 .filter(findAllCompleted()::contains)
                 .collect(toList());