minor updates

src/main/java/ru/redrise/marinesco/data/GenreRepository.java

@@ -5,7 +5,6 @@ import org.springframework.stereotype.Repository;
 
 import ru.redrise.marinesco.library.Genre;
 
-
 @Repository
 public interface GenreRepository extends JpaRepository<Genre, String>{   
 }

src/main/java/ru/redrise/marinesco/data/LibraryMetadataRepository.java

@@ -7,5 +7,4 @@ import ru.redrise.marinesco.library.LibraryMetadata;
 
 @Repository
 public interface LibraryMetadataRepository extends CrudRepository<LibraryMetadata, Long>{
-    
 }

src/main/java/ru/redrise/marinesco/data/RolesRepository.java

@@ -11,5 +11,5 @@ import ru.redrise.marinesco.security.UserRole.Type;
 
 @Repository
 public interface RolesRepository extends CrudRepository<UserRole, Long>{   
-    public List<UserRole> findByType(Type type);
+    List<UserRole> findByType(Type type);
 }

src/main/java/ru/redrise/marinesco/data/UserRepository.java

@@ -7,5 +7,5 @@ import ru.redrise.marinesco.User;
 
 @Repository
 public interface UserRepository extends CrudRepository<User, Long>{
-    public User findByUsername(String username);
+    User findByUsername(String username);
 }

src/main/java/ru/redrise/marinesco/library/AthorByIdConverter.java

@@ -8,7 +8,7 @@ import ru.redrise.marinesco.data.AuthorRepository;
 @Component
 public class AthorByIdConverter implements Converter<Long, Author>{
 
-    private AuthorRepository authorRepository;
+    private final AuthorRepository authorRepository;
 
     public AthorByIdConverter(AuthorRepository authorRepository){
         this.authorRepository = authorRepository;

src/main/java/ru/redrise/marinesco/library/GenreByIdConverter.java

@@ -8,7 +8,7 @@ import ru.redrise.marinesco.data.GenreRepository;
 @Component
 public class GenreByIdConverter implements Converter<String, Genre>{
 
-    private GenreRepository genreRepository;
+    private final GenreRepository genreRepository;
 
     public GenreByIdConverter(GenreRepository genreRepository){
         this.genreRepository = genreRepository;

src/main/java/ru/redrise/marinesco/library/InpxLibraryMetadataScanner.java

@@ -12,9 +12,9 @@ public class InpxLibraryMetadataScanner {
     private InpxLibraryMetadataScanner() { }
 
     public static LibraryMetadata saveFromFile(File inpxFile, LibraryMetadataRepository repository) throws Exception {
-        LibraryMetadata libraryMetadata = new LibraryMetadata();
+        var libraryMetadata = new LibraryMetadata();
 
-        try (ZipInputStream zipInputStream = new ZipInputStream(new FileInputStream(inpxFile))) {
+        try (var zipInputStream = new ZipInputStream(new FileInputStream(inpxFile))) {
             ZipEntry zipEntry;
             
             while ((zipEntry = zipInputStream.getNextEntry()) != null) {
@@ -37,8 +37,8 @@ public class InpxLibraryMetadataScanner {
     }
 
     private static String readPlainText(ZipInputStream zipInputStream) throws Exception {
-        byte[] content = new byte[1024];
-        StringBuilder stringBuilder = new StringBuilder();
+        var content = new byte[1024];
+        var stringBuilder = new StringBuilder();
         while (zipInputStream.read(content) > 0)
             stringBuilder.append(new String(content, StandardCharsets.UTF_8));
 

src/main/java/ru/redrise/marinesco/library/InpxScanner.java

@@ -25,19 +25,18 @@ public class InpxScanner {
     private static volatile String lastRunErrors = "";
 
     private final ThreadPoolTaskExecutor executor;
+    private final String filesLocation;
     private final AuthorRepository authorRepository;
     private final GenreRepository genreRepository;
     private final BookRepository bookRepository;
     private final LibraryMetadataRepository libraryMetadataRepository;
 
-    private final String filesLocation;
-
     public InpxScanner(ThreadPoolTaskExecutor executor,
-            ApplicationSettings applicationSettings,
-            AuthorRepository authorRepository,
-            GenreRepository genreRepository,
-            BookRepository bookRepository,
-            LibraryMetadataRepository libraryMetadataRepository) {
+                       ApplicationSettings applicationSettings,
+                       AuthorRepository authorRepository,
+                       GenreRepository genreRepository,
+                       BookRepository bookRepository,
+                       LibraryMetadataRepository libraryMetadataRepository) {
         this.executor = executor;
         this.filesLocation = applicationSettings.getFilesLocation();
         this.authorRepository = authorRepository;
@@ -81,7 +80,7 @@ public class InpxScanner {
     }
 
     private File getInpxFile() throws Exception {
-        final FileSystemResource libraryLocation = new FileSystemResource(filesLocation);
+        var libraryLocation = new FileSystemResource(filesLocation);
         return Arrays.stream(libraryLocation.getFile().listFiles())
                 .filter(file -> file.getName().endsWith(".inpx"))
                 .findFirst()
@@ -89,8 +88,8 @@ public class InpxScanner {
     }
 
     private HashMap<String, byte[]> collectInp(File inpxFile) throws Exception {
-        final HashMap<String, byte[]> inpEntries = new HashMap<>();
-        try (ZipInputStream zipInputStream = new ZipInputStream(new FileInputStream(inpxFile))) {
+        var inpEntries = new HashMap<String, byte[]>();
+        try (var zipInputStream = new ZipInputStream(new FileInputStream(inpxFile))) {
             ZipEntry zipEntry;
             while ((zipEntry = zipInputStream.getNextEntry()) != null) {
                 if (isInp(zipEntry)) {
@@ -108,7 +107,7 @@ public class InpxScanner {
     }
 
     private byte[] inpToByteArray(ZipInputStream stream, long fileSize) throws Exception {
-        ByteBuffer inpByteBuffer = ByteBuffer.allocate((int) fileSize);
+        var inpByteBuffer = ByteBuffer.allocate((int) fileSize);
         int blockSize = 0x200;
         if (fileSize < 0x200)
             blockSize = (int) fileSize;
@@ -147,8 +146,8 @@ public class InpxScanner {
         private byte[] content;
 
         private InpxWorker(Map.Entry<String, byte[]> entry,
-                Long libraryId,
-                String libraryVersion) {
+                           Long libraryId,
+                           String libraryVersion) {
             this.libraryId = libraryId;
             this.libraryVersion = libraryVersion;
             this.name = entry.getKey();
@@ -185,7 +184,7 @@ public class InpxScanner {
                 }
                 saveAll(books, authors, genres);
             } catch (Exception e) {
-                log.error("{}", e);
+                log.error(e.toString());
                 lastRunErrors = lastRunErrors + " " + e.getMessage();
             }
         }

src/main/java/ru/redrise/marinesco/library/LibraryMetadata.java

@@ -37,7 +37,7 @@ public class LibraryMetadata {
     }
 
     public void setCollectionInfo(String content) throws Exception {
-        String[] lines = content.split("\n");
+        var lines = content.split("\n");
         if (lines.length < 4)
             throw new Exception("Invalid 'collection.info' file. It contains only "+lines.length+" lines!");
         libraryName = lines[0].trim();

src/main/java/ru/redrise/marinesco/library/api/AuthorsApiController.java

@@ -15,35 +15,28 @@ import ru.redrise.marinesco.library.Author;
 @RequestMapping(path = "/api/author", 
                 produces = "application/json")
 public class AuthorsApiController {
-    private AuthorRepository authorRepository;
+    private final AuthorRepository authorRepository;
 
     public AuthorsApiController(AuthorRepository authorRepository){
         this.authorRepository = authorRepository;
     }
 
     @GetMapping
-    public Iterable<Author> getAuthors(
-        @RequestParam(value = "page", required = false, defaultValue = "0") Integer page,
-        @RequestParam(value = "sort", required = false, defaultValue = "authorName") String sortBy){
-        PageRequest pageRequest = PageRequest.of(
-            page, 10, Sort.by(sortBy).descending());
-        
+    public Iterable<Author> getAuthors(@RequestParam(value = "page", required = false, defaultValue = "0") Integer page,
+                                       @RequestParam(value = "sort", required = false, defaultValue = "authorName") String sortBy) {
+        var pageRequest = PageRequest.of(page, 10, Sort.by(sortBy).descending());
         return authorRepository.findAll(pageRequest).getContent();
     } 
     
     @GetMapping("/by/name/{name}")
-    public Iterable<Author> getAuthorId(
-        @PathVariable("name") String authorName,
-        @RequestParam(value = "page", required = false, defaultValue = "0") Integer page){        
-        
-        PageRequest pageRequest = PageRequest.of(page, 10);
-
+    public Iterable<Author> getAuthorId(@PathVariable("name") String authorName,
+                                        @RequestParam(value = "page", required = false, defaultValue = "0") Integer page) {
+        var pageRequest = PageRequest.of(page, 10);
         return authorRepository.findByAuthorNameContainingIgnoreCase(authorName, pageRequest);
     } 
 
     @GetMapping("/by/id/{id}")
     public Author getAuthorId(@PathVariable("id") Long authorId){
-    
         return authorRepository.findById(authorId).get();
     }
 }

src/main/java/ru/redrise/marinesco/library/api/BooksApiController.java

@@ -17,7 +17,7 @@ import ru.redrise.marinesco.library.Book;
 @RequestMapping(path = "/api/book", 
                 produces = "application/json")
 public class BooksApiController {
-    private BookRepository bookRepository ;
+    private final BookRepository bookRepository ;
 
     public BooksApiController(BookRepository bookRepository){
         this.bookRepository = bookRepository;
@@ -30,33 +30,23 @@ public class BooksApiController {
     }
     
     @GetMapping(params = "page")
-    public Iterable<Book> getBooks(
-        @RequestParam(value = "page", required = true) Integer page,
-        @RequestParam(value = "sort", required = false, defaultValue = "title") String sortBy){
-
-        PageRequest pageRequest = PageRequest.of(
-            page, 10, Sort.by(sortBy).descending());
-        
+    public Iterable<Book> getBooks(@RequestParam(value = "page", required = true) Integer page,
+                                   @RequestParam(value = "sort", required = false, defaultValue = "title") String sortBy){
+        var pageRequest = PageRequest.of(page, 10, Sort.by(sortBy).descending());
         return bookRepository.findAll(pageRequest).getContent();
     } 
 
     @GetMapping("/by/title/{title}")
-    public Iterable<Book> getBooksByName(
-        @PathVariable("title") String title,
-        @RequestParam(value = "page", required = false, defaultValue = "0") Integer page){
-
-        PageRequest pageRequest = PageRequest.of(page, 10);
-
+    public Iterable<Book> getBooksByName(@PathVariable("title") String title,
+                                         @RequestParam(value = "page", required = false, defaultValue = "0") Integer page){
+        var pageRequest = PageRequest.of(page, 10);
         return bookRepository.findByTitleContainingIgnoreCase(title, pageRequest);
     } 
     
     @GetMapping("/by/series/{series}")
-    public Iterable<Book> getBooksBySeries(
-        @PathVariable("series") String series,
-        @RequestParam(value = "page", required = false, defaultValue = "0") Integer page){
-
-        PageRequest pageRequest = PageRequest.of(page, 10);
-
+    public Iterable<Book> getBooksBySeries(@PathVariable("series") String series,
+                                           @RequestParam(value = "page", required = false, defaultValue = "0") Integer page){
+        var pageRequest = PageRequest.of(page, 10);
         return bookRepository.findBySeriesContainingIgnoreCase(series, pageRequest);
     } 
       

src/main/java/ru/redrise/marinesco/library/api/GenresApiController.java

@@ -24,18 +24,16 @@ import ru.redrise.marinesco.library.Genre;
 @RestController
 @RequestMapping(path = "/api/genres", produces = "application/json")
 public class GenresApiController {
-    private GenreRepository genreRepository;
+    private final GenreRepository genreRepository;
 
     public GenresApiController(GenreRepository genreRepository) {
         this.genreRepository = genreRepository;
     }
 
     @GetMapping
-    public Iterable<Genre> getGenres(
-            @RequestParam(value = "page", required = false, defaultValue = "0") Integer page,
-            @RequestParam(value = "sort", required = false, defaultValue = "genreId") String sortBy) {
-        PageRequest pageRequest = PageRequest.of(page, 10, Sort.by(sortBy).descending());
-
+    public Iterable<Genre> getGenres(@RequestParam(value = "page", required = false, defaultValue = "0") Integer page,
+                                     @RequestParam(value = "sort", required = false, defaultValue = "genreId") String sortBy) {
+        var pageRequest = PageRequest.of(page, 10, Sort.by(sortBy).descending());
         return genreRepository.findAll(pageRequest).getContent();
     }
     
@@ -53,8 +51,8 @@ public class GenresApiController {
 
     @PutMapping(path = "/{genreId}", consumes = "application/json")
     public Genre putGenre(@PathVariable("genreId") String genreId,
-        @RequestBody Genre genre){
-            genre.setGenreId(genreId);
+                          @RequestBody Genre genre){
+        genre.setGenreId(genreId);
         return genreRepository.save(genre);
     }
 

src/main/java/ru/redrise/marinesco/library/settings/GenreSettingsController.java

@@ -1,13 +1,10 @@
 package ru.redrise.marinesco.library.settings;
 
-import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.List;
 
-import org.springframework.http.ResponseEntity;
 import org.springframework.security.access.prepost.PreAuthorize;
 import org.springframework.stereotype.Controller;
-import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.ModelAttribute;
 import org.springframework.web.bind.annotation.PostMapping;
@@ -21,7 +18,6 @@ import lombok.Data;
 import lombok.extern.slf4j.Slf4j;
 import ru.redrise.marinesco.data.GenreRepository;
 import ru.redrise.marinesco.library.Genre;
-import org.springframework.web.bind.annotation.RequestBody;
 
 
 @Slf4j
@@ -30,7 +26,7 @@ import org.springframework.web.bind.annotation.RequestBody;
 @PreAuthorize("hasRole('ADMIN')")
 public class GenreSettingsController {
 
-    private GenreRepository genreRepository;
+    private final GenreRepository genreRepository;
 
     public GenreSettingsController(GenreRepository genreRepository) {
         this.genreRepository = genreRepository;
@@ -45,9 +41,8 @@ public class GenreSettingsController {
     public GenresHolder setRegistrationSetting() {
         List<Genre> genres = new ArrayList<>();
         
-        genreRepository.findAll()
-            .iterator()
-            .forEachRemaining(genres::add);
+        genreRepository.findAll().iterator()
+                .forEachRemaining(genres::add);
         
         return new GenresHolder(genres);
     }
@@ -65,14 +60,10 @@ public class GenreSettingsController {
     }
 
     @PostMapping("/upload")
-    public String postMethodName(@RequestParam("file") MultipartFile file,
-			RedirectAttributes redirectAttributes) {
-        
-        final String message = GenresUpload.upload(file.getResource(), file.getSize(), genreRepository);
-            
+    public String postUpload(@RequestParam("file") MultipartFile file,
+                             RedirectAttributes redirectAttributes) {
+        var message = GenresUpload.upload(file, genreRepository);
         redirectAttributes.addFlashAttribute("message", message);
-
         return "redirect:/settings/genres";
     }
-    
 }

src/main/java/ru/redrise/marinesco/library/settings/GenresUpload.java

@@ -3,24 +3,20 @@ package ru.redrise.marinesco.library.settings;
 import java.io.BufferedReader;
 import java.io.InputStreamReader;
 import java.util.ArrayList;
-import java.util.List;
-
-import org.springframework.core.io.Resource;
 
 import lombok.extern.slf4j.Slf4j;
+import org.springframework.web.multipart.MultipartFile;
 import ru.redrise.marinesco.data.GenreRepository;
 import ru.redrise.marinesco.library.Genre;
 
 @Slf4j
 public class GenresUpload {
 
-    public static String upload(Resource resource, long fileSize, GenreRepository repository) {
-        try (BufferedReader reader = new BufferedReader(new InputStreamReader(resource.getInputStream()))){
-            if (fileSize == 0)
-                throw new Exception("empty file");
+    public static String upload(MultipartFile file, GenreRepository repository) {
+        try (var reader = new BufferedReader(new InputStreamReader(file.getInputStream()))){
 
             String line;
-            List<Genre> genres = new ArrayList<>();
+            var genres = new ArrayList<Genre>();
             while ((line = reader.readLine()) != null) {
                 String[] arr = line.split(":::");
                 
@@ -36,6 +32,6 @@ public class GenresUpload {
             return "Upload failed: " + e.getMessage();
         }
 
-        return "Successfully uploaded: " + resource.getFilename();
+        return "Successfully uploaded: " + file.getResource().getFilename();
     }
 }

src/main/java/ru/redrise/marinesco/library/web/AuthorController.java

@@ -1,8 +1,6 @@
 package ru.redrise.marinesco.library.web;
 
-import java.util.Collections;
 import java.util.Comparator;
-import java.util.List;
 
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
@@ -11,7 +9,6 @@ import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
 
 import ru.redrise.marinesco.data.AuthorRepository;
-import ru.redrise.marinesco.library.Author;
 import ru.redrise.marinesco.library.Book;
 
 @Controller
@@ -25,15 +22,14 @@ public class AuthorController {
 
     @GetMapping("/{authorId}")
     public String getPage(@PathVariable("authorId") Long authorId, Model model) {
-        final Author author = authorRepository.findById(authorId).orElse(null);
+        var author = authorRepository.findById(authorId).orElse(null);
 
         if (author == null){
             model.addAttribute("Error", "Not found");
             return "author";
         }
 
-        List<Book> books = author.getBooks();
-
+        var books = author.getBooks();
         books.sort(Comparator.comparing(Book::getSeries));
 
         model.addAttribute("author", author)

src/main/java/ru/redrise/marinesco/library/web/BookController.java

@@ -20,7 +20,8 @@ public class BookController {
 
     @GetMapping("/{bookId}")
     public String getPage(@PathVariable("bookId") Integer bookId, Model model) {
-        Book book = bookRepository.findById(bookId).orElse(null);
+        var book = bookRepository.findById(bookId).orElse(null);
+
         if (book == null){
             model.addAttribute("Error", "Not found");
             return "book";

src/main/java/ru/redrise/marinesco/library/web/DownloadController.java

@@ -31,23 +31,24 @@ public class DownloadController {
 
     @GetMapping(value = "/")
     public void getMethodName(@RequestParam String container,
-            @RequestParam String file,
-            HttpServletResponse response) throws Exception {
-        try {
-            File bookFile = new File(filesLocation + File.separator + container + File.separator + file);
-            if (! bookFile.exists())
-                throw new Exception("No file found :[");
-            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
-            response.setHeader(HttpHeaders.CONTENT_DISPOSITION,
-                    ContentDisposition.attachment()
-                            .filename(file, StandardCharsets.UTF_8) // TODO: fix
-                            .build()
-                            .toString());
+                              @RequestParam String file,
+                              HttpServletResponse response) throws Exception {
 
-            try (ServletOutputStream outStream = response.getOutputStream();
-                FileInputStream inputStream = new FileInputStream(bookFile)) {
-                IOUtils.copy(inputStream, outStream);
-            }
+        var bookFile = new File(filesLocation + File.separator + container + File.separator + file);
+
+        if (! bookFile.exists())
+            throw new Exception("No file found :[");
+
+        response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
+        response.setHeader(HttpHeaders.CONTENT_DISPOSITION,
+                ContentDisposition.attachment()
+                        .filename(file, StandardCharsets.UTF_8) // TODO: fix
+                        .build()
+                        .toString());
+
+        try (var outStream = response.getOutputStream();
+            var inputStream = new FileInputStream(bookFile)) {
+            IOUtils.copy(inputStream, outStream);
         } catch (Exception e) {
             throw new ResponseStatusException(HttpStatus.NOT_FOUND, "Book not found [" + e.getMessage() + "]");
         }

src/main/java/ru/redrise/marinesco/library/web/SearchController.java

@@ -1,7 +1,5 @@
 package ru.redrise.marinesco.library.web;
 
-import java.util.List;
-
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
 import org.springframework.web.bind.annotation.GetMapping;
@@ -11,61 +9,45 @@ import org.springframework.web.bind.annotation.RequestParam;
 import lombok.extern.slf4j.Slf4j;
 import ru.redrise.marinesco.data.AuthorRepository;
 import ru.redrise.marinesco.data.BookRepository;
-import ru.redrise.marinesco.library.Author;
-import ru.redrise.marinesco.library.Book;
 
 @Slf4j
 @Controller
 @RequestMapping("/search")
 public class SearchController {
     
-    private final BookRepository inpEntryRepository;
+    private final BookRepository booksRepository;
     private final AuthorRepository authorRepository;
 
     public SearchController(BookRepository bookRepository, AuthorRepository authorRepository){
-        this.inpEntryRepository = bookRepository;
+        this.booksRepository = bookRepository;
         this.authorRepository = authorRepository;
     }
     
     @GetMapping
     public String requestMethodName(@RequestParam String search,
-        @RequestParam(value = "title", required = false) Boolean title,
-        @RequestParam(value = "series", required = false) Boolean series,
-        @RequestParam(value = "author", required = false) Boolean author,
-        Model model) {
+                                    @RequestParam(value = "title", required = false) Boolean title,
+                                    @RequestParam(value = "series", required = false) Boolean series,
+                                    @RequestParam(value = "author", required = false) Boolean author,
+                                    Model model) {
+        model.addAttribute("searchPattern", search)
+                .addAttribute("isTitle", title)
+                .addAttribute("isSeries", series)
+                .addAttribute("isAuthor", author);
 
-        if (search.trim().isEmpty())
-            return "search";
-        
-        model.addAttribute("searchPattern", search);
-
-        if (search.length() < 4){
+        if (search.isBlank() || search.length() < 4){
             model.addAttribute("error", "Should be at least 4 chars");
             return "search";
         }
 
-        if (title != null){
-            List<Book> books = inpEntryRepository.findByTitleContainingIgnoreCase(search);
-            if (!books.isEmpty())
-                model.addAttribute("books", books);
-            model.addAttribute("isTitle", true);
-        }
+        if (title != null && title)
+            model.addAttribute("books", booksRepository.findByTitleContainingIgnoreCase(search));
 
-        if (series != null){
-            List<Book> bookSeries = inpEntryRepository.findBySeriesContainingIgnoreCase(search);
-            if (!bookSeries.isEmpty())
-                model.addAttribute("series", bookSeries);
-            model.addAttribute("isSeries", true);
-        }
+        if (series != null && series)
+            model.addAttribute("series", booksRepository.findBySeriesContainingIgnoreCase(search));
 
-        if (author != null){
-            List<Author> authors = authorRepository.findByAuthorNameContainingIgnoreCase(search);
-            if (!authors.isEmpty())
-                model.addAttribute("authors", authors);
-            model.addAttribute("isAuthor", true);
-        }
+        if (author != null && author)
+            model.addAttribute("authors", authorRepository.findByAuthorNameContainingIgnoreCase(search));
 
         return "search";
     }
-    
 }

src/main/java/ru/redrise/marinesco/security/AdministratorAddUserForm.java

@@ -12,7 +12,7 @@ import ru.redrise.marinesco.User;
 
 //TODO: refactor along with RegistrationForm.java
 @Data
-public class AdministatorAddUserForm {
+public class AdministratorAddUserForm {
 
     @NotNull
     @Size(min=3, max=32, message="Username must be at least 3 characters long. Should not exceed 32 characters.")

src/main/java/ru/redrise/marinesco/security/ManageUsersController.java

@@ -47,7 +47,7 @@ public class ManageUsersController {
     @ModelAttribute
     public void addTitle(Model model) {
         model.addAttribute("header_text", "Manage users");
-        model.addAttribute("administatorAddUserForm", new AdministatorAddUserForm());
+        model.addAttribute("administratorAddUserForm", new AdministratorAddUserForm());
     }
 
     @ModelAttribute
@@ -103,7 +103,7 @@ public class ManageUsersController {
     }
 
     @PostMapping
-    public String processNewUser(@Valid AdministatorAddUserForm form, Errors errors, Model model) {
+    public String processNewUser(@Valid AdministratorAddUserForm form, Errors errors, Model model) {
         if (userRepository.findByUsername(form.getUsername()) != null) {
             model.addAttribute("loginOccupied", "Login already in use. Please choose another one");
             return "manage_users";

src/main/resources/templates/manage_users.html

@@ -44,7 +44,7 @@
             </div>
             <hr>
             <b>Add user</b>
-            <form method="POST" th:action="@{/settings/manage_users}" th:object="${administatorAddUserForm}">
+            <form method="POST" th:action="@{/settings/manage_users}" th:object="${administratorAddUserForm}">
                 <span class="validationError" th:if="${loginOccupied} != null" th:text="${loginOccupied}">pew</span>
                 <span class="validationError" th:if="${#fields.hasErrors('username')}"
                     th:errors="*{username}">Error</span>