Added book controller

src/main/java/com/fnecan/study/bookapi/api/BookController.java

@@ -1,4 +1,38 @@
 package com.fnecan.study.bookapi.api;
 
+import com.fnecan.study.bookapi.model.BookDocument;
+import com.fnecan.study.bookapi.service.BookService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestHeader;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/api/v1/books")
 public class BookController {
+
+    @Autowired
+    BookService bookService;
+
+    @GetMapping
+    public ResponseEntity getBooksForUser(@RequestHeader("userId") String userId){
+        return ResponseEntity.ok(
+                bookService.getBooksForUser(userId)
+        );
+    }
+
+    @GetMapping("/{bookId}")
+    public ResponseEntity getBookDetails(
+            @RequestHeader("userId") String userId,
+            @PathVariable("bookId") String bookId
+    ){
+        return ResponseEntity.ok(
+                bookService.getBookDetails(userId, bookId)
+        );
+    }   
 }

src/main/java/com/fnecan/study/bookapi/model/BookDocument.java

@@ -11,11 +11,13 @@ public class BookDocument {
     private String author;
     private String isbn;
     private Genre genre;
+    private String userId;
 
-    public BookDocument(String author, String isbn, Genre genre) {
+    public BookDocument(String author, String isbn, Genre genre, String userId) {
         this.author = author;
         this.isbn = isbn;
         this.genre = genre;
+        this.userId = userId;
     }
 
     public String getAuthor() {
@@ -41,4 +43,12 @@ public class BookDocument {
     public void setGenre(Genre genre) {
         this.genre = genre;
     }
+
+    public String getUserId() {
+        return userId;
+    }
+
+    public void setUserId(String userId) {
+        this.userId = userId;
+    }
 }

src/main/java/com/fnecan/study/bookapi/model/UserDocument.java

@@ -0,0 +1,34 @@
+package com.fnecan.study.bookapi.model;
+
+import org.springframework.data.annotation.Id;
+import org.springframework.data.mongodb.core.mapping.Document;
+
+@Document
+public class UserDocument {
+    @Id
+    private String userId;
+
+    private String username;
+    private String location;
+
+    public UserDocument(String username, String location) {
+        this.username = username;
+        this.location = location;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public String getLocation() {
+        return location;
+    }
+
+    public void setLocation(String location) {
+        this.location = location;
+    }
+}

src/main/java/com/fnecan/study/bookapi/repository/BookRepository.java

@@ -0,0 +1,12 @@
+package com.fnecan.study.bookapi.repository;
+
+import com.fnecan.study.bookapi.model.BookDocument;
+import org.springframework.data.mongodb.repository.MongoRepository;
+
+import java.util.List;
+import java.util.Optional;
+
+public interface BookRepository extends MongoRepository<BookDocument, String> {
+    List<BookDocument> findByUserId(String userId);
+    Optional<BookDocument> findByUserIdAndId(String userId, String bookId);
+}

src/main/java/com/fnecan/study/bookapi/service/BookService.java

@@ -0,0 +1,24 @@
+package com.fnecan.study.bookapi.service;
+
+import com.fnecan.study.bookapi.model.BookDocument;
+import com.fnecan.study.bookapi.repository.BookRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+import java.util.Optional;
+
+@Service
+public class BookService {
+
+    @Autowired
+    BookRepository bookRepository;
+
+    public List<BookDocument> getBooksForUser(String userId) {
+        return bookRepository.findByUserId(userId);
+    }
+
+    public Optional<BookDocument> getBookDetails(String userId, String bookId) {
+        return bookRepository.findByUserIdAndId(userId, bookId);
+    }
+}