feat: finish implementation of the service layer

Author: vianavitor-dev

src/main/java/com/vianavitor/simplelibrarygame/model/BookSummary.java

@@ -32,11 +32,11 @@ public void setId(Long id) {
         this.id = id;
     }
 
-    public Student getUser() {
+    public Student getStudent() {
         return student;
     }
 
-    public void setUser(Student student) {
+    public void setStudent(Student student) {
         this.student = student;
     }
 

src/main/java/com/vianavitor/simplelibrarygame/model/GroupOfBook.java

@@ -31,19 +31,19 @@ public void setId(GroupOfBookId id) {
         this.id = id;
     }
 
-    public Group getGroups() {
+    public Group getGroup() {
         return group;
     }
 
-    public void setGroups(Group group) {
+    public void setGroup(Group group) {
         this.group = group;
     }
 
-    public Book getBooks() {
+    public Book getBook() {
         return book;
     }
 
-    public void setBooks(Book book) {
+    public void setBook(Book book) {
         this.book = book;
     }
 

src/main/java/com/vianavitor/simplelibrarygame/model/utils/fields/GroupOfBookId.java

@@ -2,8 +2,10 @@
 
 import jakarta.persistence.Column;
 import jakarta.persistence.Embeddable;
+import org.springframework.beans.factory.annotation.Autowired;
 
 import java.io.Serializable;
+import java.util.Objects;
 
 @Embeddable
 public class GroupOfBookId implements Serializable {
@@ -12,4 +14,41 @@ public class GroupOfBookId implements Serializable {
 
     @Column(name = "book_id")
     private Long bookId;
+
+    public Long getGroupId() {
+        return groupId;
+    }
+
+    public void setGroupId(Long groupId) {
+        this.groupId = groupId;
+    }
+
+    public Long getBookId() {
+        return bookId;
+    }
+
+    public void setBookId(Long bookId) {
+        this.bookId = bookId;
+    }
+
+    @Autowired
+    public GroupOfBookId() {
+    }
+
+    public GroupOfBookId(Long groupId, Long bookId) {
+        this.groupId = groupId;
+        this.bookId = bookId;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (o == null || getClass() != o.getClass()) return false;
+        GroupOfBookId that = (GroupOfBookId) o;
+        return Objects.equals(groupId, that.groupId) && Objects.equals(bookId, that.bookId);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(groupId, bookId);
+    }
 }

src/main/java/com/vianavitor/simplelibrarygame/repository/BookReadHistoryRepository.java

@@ -6,9 +6,11 @@
 import org.springframework.data.repository.CrudRepository;
 import org.springframework.stereotype.Repository;
 
+import java.util.List;
+
 @Repository
 public interface BookReadHistoryRepository extends CrudRepository<BookReadHistory, Long> {
-    void findByBook(Book book);
+    List<BookReadHistory> findByBook(Book book);
 
-    void findByStudent(Student student);
+    List<BookReadHistory> findByStudent(Student student);
 }

src/main/java/com/vianavitor/simplelibrarygame/service/AuthorService.java

@@ -0,0 +1,45 @@
+package com.vianavitor.simplelibrarygame.service;
+
+import com.vianavitor.simplelibrarygame.model.Author;
+import com.vianavitor.simplelibrarygame.model.Book;
+import com.vianavitor.simplelibrarygame.repository.AuthorRepository;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+public class AuthorService {
+    private AuthorRepository repository;
+
+    public void add(String name) {
+        repository.findByName(name)
+                .ifPresent((a) -> {
+                    throw new RuntimeException("author already registered");
+                });
+
+        Author author = new Author();
+        author.setName(name);
+
+        repository.save(author);
+    }
+
+    public Author getByName(String name) {
+        return repository.findByName(name)
+                .orElseThrow(() -> new RuntimeException("not found author"));
+    }
+
+    public List<Author> getAll() {
+        return (List<Author>) repository.findAll();
+    }
+
+    public Author get(Long id) {
+        return repository.findById(id)
+                .orElseThrow(() -> new RuntimeException("not found author"));
+    }
+
+    public List<Book> getAuthorBooks(Long id) {
+        return repository.findById(id)
+                .orElseThrow(() -> new RuntimeException("not found author"))
+                .getBooks();
+    }
+}

src/main/java/com/vianavitor/simplelibrarygame/service/BookReadHistoryService.java

@@ -0,0 +1,78 @@
+package com.vianavitor.simplelibrarygame.service;
+
+import com.vianavitor.simplelibrarygame.model.Book;
+import com.vianavitor.simplelibrarygame.model.BookReadHistory;
+import com.vianavitor.simplelibrarygame.model.Student;
+import com.vianavitor.simplelibrarygame.repository.BookReadHistoryRepository;
+import com.vianavitor.simplelibrarygame.repository.BookRepository;
+import com.vianavitor.simplelibrarygame.repository.StudentRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.time.LocalDate;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+
+@Service
+public class BookReadHistoryService {
+    @Autowired
+    private BookReadHistoryRepository repository;
+
+    @Autowired
+    private BookRepository bookRepository;
+
+    @Autowired
+    private StudentRepository studentRepository;
+
+    public void register(BookReadHistory data) {
+        Book book = bookRepository.findById(data.getBook().getId())
+                .orElseThrow(() -> new RuntimeException("not found book"));
+
+        Student student = studentRepository.findById(data.getUser().getId())
+                .orElseThrow(() -> new RuntimeException("not found student"));
+
+        Optional<BookReadHistory> result = repository.findByStudent(student)
+                .stream()
+//                check if the student has already read this book before...
+                .filter((s) ->
+                        Objects.equals(s.getBook().getId(), book.getId())
+                ).findFirst();
+
+        if (result.isEmpty()) {
+            data.setBook(book);
+            data.setUser(student);
+        } else {
+            data = result.get();
+        }
+
+        LocalDate now = LocalDate.now();
+        data.setLastUpdate(now);
+        
+        repository.save(data);
+    }
+
+    public List<BookReadHistory> getByStudent(Long studentId) {
+        Student student = studentRepository.findById(studentId)
+                .orElseThrow(() -> new RuntimeException("not found student"));
+
+        return repository.findByStudent(student);
+    }
+
+    public List<BookReadHistory> getByBook(Long bookId) {
+        Book book = bookRepository.findById(bookId)
+                .orElseThrow(() -> new RuntimeException("not found book"));
+
+        return repository.findByBook(book);
+    }
+
+    public BookReadHistory getByStudentTheLastOne(Long studentId) {
+        Student student = studentRepository.findById(studentId)
+                .orElseThrow(() -> new RuntimeException("not found student"));
+
+        return repository.findByStudent(student)
+                .stream()
+                .findFirst()
+                .orElseGet(BookReadHistory::new);
+    }
+}

src/main/java/com/vianavitor/simplelibrarygame/service/BookSummaryService.java

@@ -0,0 +1,53 @@
+package com.vianavitor.simplelibrarygame.service;
+
+import com.vianavitor.simplelibrarygame.model.Book;
+import com.vianavitor.simplelibrarygame.model.BookSummary;
+import com.vianavitor.simplelibrarygame.model.Student;
+import com.vianavitor.simplelibrarygame.repository.BookRepository;
+import com.vianavitor.simplelibrarygame.repository.BookSummaryRepository;
+import com.vianavitor.simplelibrarygame.repository.StudentRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+public class BookSummaryService {
+
+    @Autowired
+    private BookSummaryRepository repository;
+
+    @Autowired
+    private BookRepository bookRepository;
+
+    @Autowired
+    private StudentRepository studentRepository;
+
+    public void submit(String text, Long bookId, Long studentId)  {
+        Book book = bookRepository.findById(bookId)
+                .orElseThrow(() -> new RuntimeException("not found book"));
+
+        Student student = studentRepository.findById(studentId)
+                .orElseThrow(() -> new RuntimeException("student not found"));
+
+        BookSummary summary = new BookSummary();
+        summary.setBook(book);
+        summary.setStudent(student);
+
+        repository.save(summary);
+    }
+
+    public List<BookSummary> getByStudent(Long studentId) {
+        Student student = studentRepository.findById(studentId)
+                .orElseThrow(() -> new RuntimeException("student not found"));
+
+        return repository.findByStudent(student);
+    }
+
+    public List<BookSummary> getByBook(Long bookId) {
+        Book book = bookRepository.findById(bookId)
+                .orElseThrow(() -> new RuntimeException("book not found"));
+
+        return repository.findByBook(book);
+    }
+}

src/main/java/com/vianavitor/simplelibrarygame/service/GenreService.java

@@ -0,0 +1,28 @@
+package com.vianavitor.simplelibrarygame.service;
+
+import com.vianavitor.simplelibrarygame.model.Genre;
+import com.vianavitor.simplelibrarygame.repository.GenreRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+public class GenreService {
+    @Autowired
+    private GenreRepository repository;
+
+    public List<Genre> getAll() {
+        return repository.findAll();
+    }
+
+    public Genre getById(Long id) {
+        return repository.findById(id)
+                .orElseThrow(() -> new RuntimeException("this genre don't exists"));
+    }
+
+    public Genre getByName(String name) {
+        return repository.findByName(name)
+                .orElseThrow(() -> new RuntimeException("this genre don't exists"));
+    }
+}

src/main/java/com/vianavitor/simplelibrarygame/service/GroupOfBookService.java

@@ -0,0 +1,51 @@
+package com.vianavitor.simplelibrarygame.service;
+
+import com.vianavitor.simplelibrarygame.model.Book;
+import com.vianavitor.simplelibrarygame.model.Group;
+import com.vianavitor.simplelibrarygame.model.GroupOfBook;
+import com.vianavitor.simplelibrarygame.model.utils.fields.GroupOfBookId;
+import com.vianavitor.simplelibrarygame.repository.BookRepository;
+import com.vianavitor.simplelibrarygame.repository.GroupOfBookRepository;
+import com.vianavitor.simplelibrarygame.repository.GroupRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class GroupOfBookService {
+    @Autowired
+    private GroupOfBookRepository repository;
+
+    @Autowired
+    private BookRepository bookRepository;
+
+    @Autowired
+    private GroupRepository groupRepository;
+
+    public void addBookToGroup(Long groupId, Long bookId) {
+        Group group = groupRepository.findById(groupId)
+                .orElseThrow(() -> new RuntimeException("not found group"));
+
+        Book book = bookRepository.findById(bookId)
+                .orElseThrow(() -> new RuntimeException("not found book"));
+
+        GroupOfBookId id = new GroupOfBookId(groupId, bookId);
+        repository.findById(id)
+                .ifPresent((x) -> {
+                    throw new RuntimeException("book already saved into the group");
+                });
+
+        GroupOfBook groupOfBook = new GroupOfBook();
+        groupOfBook.setBook(book);
+        groupOfBook.setGroup(group);
+
+        repository.save(groupOfBook);
+    }
+
+    public void removeBookFromGroup(Long groupId, Long bookId) {
+        GroupOfBookId id = new GroupOfBookId(groupId, bookId);
+        GroupOfBook groupOfBook = repository.findById(id)
+                .orElseThrow(() -> new RuntimeException("this book is not registered in the group"));
+
+        repository.delete(groupOfBook);
+    }
+}