#119 add send notification functions

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

@@ -23,7 +23,9 @@ import java.io.IOException;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.Date;
+import java.util.HashSet;
 import java.util.List;
+import java.util.Set;
 
 import static java.util.stream.Collectors.toList;
 import static org.springframework.util.ObjectUtils.isEmpty;
@@ -41,6 +43,7 @@ public class GrantService {
     private final UserService userService;
     private final PaperService paperService;
     private final EventService eventService;
+    private final GrantNotificationService grantNotificationService;
 
     public GrantService(GrantRepository grantRepository,
                         FileService fileService,
@@ -48,7 +51,8 @@ public class GrantService {
                         ProjectService projectService,
                         UserService userService,
                         PaperService paperService,
-                        EventService eventService) {
+                        EventService eventService,
+                        GrantNotificationService grantNotificationService) {
         this.grantRepository = grantRepository;
         this.fileService = fileService;
         this.deadlineService = deadlineService;
@@ -56,6 +60,7 @@ public class GrantService {
         this.userService = userService;
         this.paperService = paperService;
         this.eventService = eventService;
+        this.grantNotificationService = grantNotificationService;
     }
 
     public List<Grant> findAll() {
@@ -77,6 +82,7 @@ public class GrantService {
         Grant newGrant = copyFromDto(new Grant(), grantDto);
         newGrant = grantRepository.save(newGrant);
         eventService.createFromGrant(newGrant);
+        grantNotificationService.sendCreateNotification(newGrant);
         return newGrant.getId();
     }
 
@@ -113,6 +119,8 @@ public class GrantService {
     @Transactional
     public Integer update(GrantDto grantDto) throws IOException {
         Grant grant = grantRepository.findOne(grantDto.getId());
+        Set<User> oldAuthors = new HashSet<>(grant.getAuthors());
+        User oldLeader = grant.getLeader();
         for (FileDataDto file : grantDto.getFiles().stream()
                 .filter(f -> f.isDeleted() && f.getId() != null)
                 .collect(toList())) {
@@ -120,6 +128,20 @@ public class GrantService {
         }
         grantDto.getRemovedDeadlineIds().forEach(deadlineService::remove);
         grantRepository.save(copyFromDto(grant, grantDto));
+
+        grant.getAuthors().forEach(author -> {
+            if (!oldAuthors.contains(author)) {
+                grantNotificationService.sendAuthorsChangeNotification(grant, oldAuthors);
+            }
+        });
+        oldAuthors.forEach(oldAuthor -> {
+            if (!grant.getAuthors().contains(oldAuthor)) {
+                grantNotificationService.sendAuthorsChangeNotification(grant, oldAuthors);
+            }
+        });
+        if (grant.getLeader() != oldLeader) {
+            grantNotificationService.sendLeaderChangeNotification(grant, oldLeader);
+        }
         eventService.updateGrantDeadlines(grant);
         return grant.getId();
     }
@@ -148,6 +170,7 @@ public class GrantService {
         grant = grantRepository.save(grant);
 
         eventService.createFromGrant(grant);
+        grantNotificationService.sendCreateNotification(grant);
 
         return grant;
     }
@@ -222,7 +245,6 @@ public class GrantService {
                 .filter(paper -> paper.getAuthors() != null)
                 .flatMap(paper -> paper.getAuthors().stream())
                 .collect(toList());
-
     }
 
     private List<User> getBAKAuthors() {