Just push

pom.xml

@@ -106,6 +106,12 @@
 			<version>6.5.0</version>
 		</dependency>
 
+		<dependency>
+			<groupId>org.hibernate.validator</groupId>
+			<artifactId>hibernate-validator</artifactId>
+		</dependency>
+
+
 
 	</dependencies>
 

src/main/java/net/tokishu/note/config/SecurityConfig.java

@@ -31,7 +31,7 @@ public class SecurityConfig {
                 )
                 .authorizeHttpRequests(auth -> auth
                         .requestMatchers(new AntPathRequestMatcher("/api/auth/**")).permitAll()
-                        .requestMatchers(new AntPathRequestMatcher("/h2-console/**")).permitAll()
+                        .requestMatchers(new AntPathRequestMatcher("/api/notes/*")).permitAll()
                         .requestMatchers(new AntPathRequestMatcher("/error")).permitAll()
                         .anyRequest().authenticated()
                 )

src/main/java/net/tokishu/note/controller/AuthController.java

@@ -14,12 +14,14 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpEntity;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
+import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.*;
 
 import java.util.Map;
 
 @RestController
 @RequiredArgsConstructor
+@Validated
 @RequestMapping("/auth")
 public class AuthController {
 
@@ -38,7 +40,6 @@ public class AuthController {
         return ResponseEntity.ok(response);
     }
 
-
     @PostMapping("/new-root")
     public ResponseEntity<RootResponse> newRoot() {
         RootResponse response = authService.registerRoot();

src/main/java/net/tokishu/note/controller/NotesController.java

@@ -1,11 +1,13 @@
 package net.tokishu.note.controller;
 
+import jakarta.validation.Valid;
 import lombok.RequiredArgsConstructor;
 import net.tokishu.note.dto.request.NoteRequest;
 import net.tokishu.note.dto.response.NoteResponse;
 import net.tokishu.note.service.NoteService;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
+import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.*;
 
 import java.util.List;
@@ -14,6 +16,7 @@ import java.util.UUID;
 
 @RequiredArgsConstructor
 @RestController
+@Validated
 @RequestMapping("/notes")
 public class NotesController {
 
@@ -24,19 +27,19 @@ public class NotesController {
         return ResponseEntity.ok(noteService.getAll());
     }
 
-    @GetMapping("/{uuid}")
-    public NoteResponse find(@PathVariable UUID uuid){
-        return noteService.find(uuid);
+    @GetMapping("/{idOrCode}")
+    public NoteResponse find(@PathVariable String idOrCode) {
+        return noteService.findByIdOrPublicLink(idOrCode);
     }
 
     @PostMapping()
-    public ResponseEntity<Map<String, String>> add(@RequestBody NoteRequest note){
+    public ResponseEntity<Map<String, String>> add(@RequestBody @Valid NoteRequest note){
         noteService.add(note);
         return ResponseEntity.status(HttpStatus.CREATED).body(Map.of("message", "Note added"));
     }
 
     @PutMapping("/{uuid}")
-    public ResponseEntity<?> update(@PathVariable("uuid") UUID uuid, @RequestBody NoteRequest note){
+    public ResponseEntity<?> update(@PathVariable("uuid") UUID uuid, @RequestBody @Valid NoteRequest note){
         noteService.update(uuid, note);
         return ResponseEntity.ok(Map.of("message", "Note updated"));
     }

src/main/java/net/tokishu/note/dto/request/NoteRequest.java

@@ -1,6 +1,7 @@
 package net.tokishu.note.dto.request;
 
 import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
 import jakarta.validation.constraints.Size;
 import lombok.Data;
 
@@ -13,4 +14,7 @@ public class NoteRequest {
     @NotBlank
     @Size(min=1, max=8192)
     private String text;
+
+    @NotNull
+    private Boolean isPublic;
 }

src/main/java/net/tokishu/note/dto/response/NoteResponse.java

@@ -12,6 +12,8 @@ public class NoteResponse {
     private UUID uuid;
     private String name;
     private String text;
+    private Boolean isPublic;
+    private String publicLink;
     private String author;
     private LocalDateTime createdAt;
 }

src/main/java/net/tokishu/note/exception/GlobalExceptionHandler.java

@@ -4,6 +4,7 @@ import jakarta.servlet.http.HttpServletRequest;
 import net.tokishu.note.dto.response.ApiErrorResponse;
 import org.springframework.http.ResponseEntity;
 import org.springframework.http.converter.HttpMessageNotReadableException;
+import org.springframework.web.bind.MethodArgumentNotValidException;
 import org.springframework.web.bind.annotation.ControllerAdvice;
 import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.server.ResponseStatusException;
@@ -12,48 +13,58 @@ import org.springframework.web.servlet.NoHandlerFoundException;
 @ControllerAdvice
 public class GlobalExceptionHandler {
 
-    @ExceptionHandler(ResponseStatusException.class)
-    public ResponseEntity<ApiErrorResponse> handle(ResponseStatusException ex) {
-        return ResponseEntity
-                .status(ex.getStatusCode())
-                .body(ApiErrorResponse.builder()
-                        .status(ex.getStatusCode().value())
-                        .message(ex.getReason() != null ? ex.getReason() : "Unexpected error")
-                        .build()
-                );
-    }
-
-    @ExceptionHandler(HttpMessageNotReadableException.class)
-    public ResponseEntity<ApiErrorResponse> handleBadRequest(HttpMessageNotReadableException ex) {
-        return ResponseEntity
-                .badRequest()
-                .body(ApiErrorResponse.builder()
-                        .status(400)
-                        .message("Invalid request body")
-                        .build()
-                );
-    }
-
-    @ExceptionHandler(NoHandlerFoundException.class)
-    public ResponseEntity<ApiErrorResponse> handleNotFound(NoHandlerFoundException ex) {
-        return ResponseEntity
-                .status(404)
-                .body(ApiErrorResponse.builder()
-                        .status(404)
-                        .message("Endpoint not found")
-                        .build()
-                );
-    }
-
-
     @ExceptionHandler(Exception.class)
-    public ResponseEntity<ApiErrorResponse> handleGeneric(Exception ex) {
+    public ResponseEntity<ApiErrorResponse> handleAll(Exception ex) {
+        if (ex instanceof MethodArgumentNotValidException validationEx) {
+            return handleValidation(validationEx);
+        }
+
+        switch (ex.getClass().getSimpleName()) {
+            case "ResponseStatusException" -> {
+                ResponseStatusException rse = (ResponseStatusException) ex;
+                return buildErrorResponse(rse.getStatusCode().value(), rse.getReason());
+            }
+            case "NoHandlerFoundException" -> {
+                return buildErrorResponse(404, "Endpoint not found");
+            }
+            case "HttpMessageNotReadableException" -> {
+                return buildErrorResponse(400, "Invalid request body");
+            }
+            case "HttpRequestMethodNotSupportedException" -> {
+                return buildErrorResponse(405, "Method not allowed");
+            }
+            case "HttpMediaTypeNotSupportedException" -> {
+                return buildErrorResponse(415, "Unsupported media type");
+            }
+            case "HttpMediaTypeNotAcceptableException" -> {
+                return buildErrorResponse(406, "Not acceptable");
+            }
+            case "HttpRequestTimeoutException" -> {
+                return buildErrorResponse(408, "Request timeout");
+            }
+            default -> {
+                return buildErrorResponse(500, "Internal server error");
+            }
+        }
+    }
+
+    @ExceptionHandler(MethodArgumentNotValidException.class)
+    public ResponseEntity<ApiErrorResponse> handleValidation(MethodArgumentNotValidException ex) {
+        String message = ex.getBindingResult().getFieldErrors().stream()
+                .map(error -> error.getField() + ": " + error.getDefaultMessage())
+                .findFirst()
+                .orElse("Invalid request");
+
+        return buildErrorResponse(400, message);
+    }
+
+
+    private ResponseEntity<ApiErrorResponse> buildErrorResponse(int status, String message) {
         return ResponseEntity
-                .status(500)
+                .status(status)
                 .body(ApiErrorResponse.builder()
-                        .status(500)
-                        .message("Internal server error")
-                        .build()
-                );
+                        .status(status)
+                        .message(message != null ? message : "Unexpected error")
+                        .build());
     }
 }

src/main/java/net/tokishu/note/model/Note.java

@@ -1,7 +1,10 @@
 package net.tokishu.note.model;
 
 import jakarta.persistence.*;
+import jakarta.validation.constraints.Null;
+import lombok.Builder;
 import lombok.Data;
+import org.hibernate.annotations.ColumnDefault;
 import org.hibernate.annotations.CreationTimestamp;
 import org.springframework.validation.annotation.Validated;
 
@@ -15,13 +18,21 @@ public class Note {
     @Id
     @GeneratedValue(strategy = GenerationType.UUID)
     private UUID uuid;
+    @Column(length = 128, nullable = false)
     private String name;
+    @Column(length = 8192, nullable = false)
     private String text;
 
     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "author", referencedColumnName = "username")
     private User author;
 
+    @Column(length = 6, nullable = true, updatable = false)
+    private String publicLink;
+
+    @ColumnDefault("false")
+    private Boolean isPublic;
+
     @CreationTimestamp
     @Column(updatable = false)
     private LocalDateTime createdAt;

src/main/java/net/tokishu/note/repo/NoteRepository.java

@@ -4,9 +4,12 @@ import net.tokishu.note.model.Note;
 import org.springframework.data.jpa.repository.JpaRepository;
 
 import java.util.List;
+import java.util.Optional;
 import java.util.UUID;
 
 public interface NoteRepository extends JpaRepository<Note, UUID> {
     List<Note> findByAuthorUsername(String username);
     List<Note> findByAuthorUsernameOrderByCreatedAtDesc(String username);
+    Optional<Note> findByPublicLinkAndIsPublicTrue(String publicLink);
+    boolean existsByPublicLink(String publicLink);
 }

src/main/java/net/tokishu/note/repo/UserRepository.java

@@ -6,4 +6,5 @@ import org.springframework.data.jpa.repository.JpaRepository;
 import java.util.UUID;
 
 public interface UserRepository extends JpaRepository<User, String> {
+    boolean existsByRole(String role);
 }

src/main/java/net/tokishu/note/service/AuthService.java

@@ -9,7 +9,7 @@ import net.tokishu.note.dto.response.RootResponse;
 import net.tokishu.note.model.User;
 import net.tokishu.note.repo.UserRepository;
 import net.tokishu.note.security.JwtService;
-import net.tokishu.note.security.PasswordService;
+import net.tokishu.note.util.PasswordGenerator;
 import org.springframework.http.HttpStatus;
 import org.springframework.security.crypto.password.PasswordEncoder;
 import org.springframework.stereotype.Service;
@@ -20,17 +20,15 @@ import org.springframework.web.server.ResponseStatusException;
 public class AuthService {
 
     public final UserRepository userRepository;
-    public final UserService userService;
-    public final PasswordService passwordService;
     private final PasswordEncoder passwordEncoder;
     private final JwtService jwtService;
 
     public RootResponse registerRoot() {
-        userRepository.findById("root").ifPresent(user -> {
-            throw new ResponseStatusException(HttpStatus.FORBIDDEN, "Root user already exists");
-        });
+        if (userRepository.existsByRole("ADMIN")) {
+            throw new ResponseStatusException(HttpStatus.FORBIDDEN, "Administrator already exists");
+        }
 
-        String rawPassword = passwordService.generate(16);
+        String rawPassword = PasswordGenerator.generate(16);
         String hashedPassword = passwordEncoder.encode(rawPassword);
 
         User rootUser = new User();

src/main/java/net/tokishu/note/service/NoteService.java

@@ -6,9 +6,10 @@ import net.tokishu.note.dto.response.NoteResponse;
 import net.tokishu.note.model.Note;
 import net.tokishu.note.model.User;
 import net.tokishu.note.repo.NoteRepository;
-import net.tokishu.note.repo.UserRepository;
+import net.tokishu.note.util.CodeGenerator;
 import org.springframework.http.HttpStatus;
 import org.springframework.stereotype.Service;
+import org.springframework.util.StringUtils;
 import org.springframework.web.server.ResponseStatusException;
 
 import java.util.*;
@@ -20,7 +21,6 @@ public class NoteService {
 
     public final NoteRepository noteRepository;
     public final UserService userService;
-    public final UserRepository userRepository;
 
     public List<NoteResponse> getAll() {
         User currentUser = userService.getCurrentUser();
@@ -37,15 +37,28 @@ public class NoteService {
                 .collect(Collectors.toList());
     }
 
-    public NoteResponse find(UUID uuid) {
-        Note note = noteRepository.findById(uuid)
+    public NoteResponse findByIdOrPublicLink(String idOrCode) {
+        if (!StringUtils.hasText(idOrCode)) {
+            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Invalid identifier or public link");
+        }
+
+        Note note;
+        if (isUuid(idOrCode)) {
+            UUID id = UUID.fromString(idOrCode);
+            note = noteRepository.findById(id)
                     .orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND, "Note not found"));
 
             User currentUser = userService.getCurrentUser();
             checkOwnership(note, currentUser);
+        } else {
+            note = noteRepository.findByPublicLinkAndIsPublicTrue(idOrCode)
+                    .orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND, "Note not found"));
+        }
+
         return toResponse(note);
     }
 
+
     public NoteResponse add(NoteRequest data) {
         User author = userService.getCurrentUser();
 
@@ -54,10 +67,26 @@ public class NoteService {
         note.setText(data.getText());
         note.setAuthor(author);
 
+        String code;
+
+        int attempts = 0;
+        do {
+            code = CodeGenerator.generateCode();
+            attempts++;
+            if (attempts > 10) {
+                throw new ResponseStatusException(HttpStatus.INTERNAL_SERVER_ERROR, "Failed to generate unique public link");
+            }
+        } while (noteRepository.existsByPublicLink(code));
+
+        note.setPublicLink(code);
+
+        note.setIsPublic(Boolean.TRUE.equals(data.getIsPublic()));
+
         Note saved = noteRepository.save(note);
         return toResponse(saved);
     }
 
+
     public NoteResponse update(UUID uuid, NoteRequest data) {
         Note existing = noteRepository.findById(uuid)
                 .orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND, "Note not found"));
@@ -67,6 +96,7 @@ public class NoteService {
 
         existing.setName(data.getName());
         existing.setText(data.getText());
+        existing.setIsPublic(Boolean.TRUE.equals(data.getIsPublic()));
 
         return toResponse(noteRepository.save(existing));
     }
@@ -81,7 +111,7 @@ public class NoteService {
     }
 
     private void checkOwnership(Note note, User user) {
-        if ("ADMIN".equalsIgnoreCase(user.getRole())) {
+        if ("ADMIN".equalsIgnoreCase(user.getRole())) { // TODO: use enum
             return;
         }
 
@@ -95,8 +125,19 @@ public class NoteService {
                 .uuid(note.getUuid())
                 .name(note.getName())
                 .text(note.getText())
+                .isPublic(note.getIsPublic())
+                .publicLink(note.getPublicLink())
                 .author(note.getAuthor().getUsername())
                 .createdAt(note.getCreatedAt())
                 .build();
     }
+
+    private boolean isUuid(String input) {
+        try {
+            UUID.fromString(input);
+            return true;
+        } catch (IllegalArgumentException e) {
+            return false;
+        }
+    }
 }

src/main/java/net/tokishu/note/util/CodeGenerator.java

@@ -0,0 +1,21 @@
+package net.tokishu.note.util;
+
+import lombok.experimental.UtilityClass;
+
+import java.security.SecureRandom;
+import java.util.Random;
+
+@UtilityClass
+public class CodeGenerator {
+    private static final String CHARACTERS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
+    private static final int LENGTH = 6;
+    private static final Random RANDOM = new SecureRandom();
+
+    public String generateCode() {
+        StringBuilder sb = new StringBuilder(LENGTH);
+        for (int i = 0; i < LENGTH; i++) {
+            sb.append(CHARACTERS.charAt(RANDOM.nextInt(CHARACTERS.length())));
+        }
+        return sb.toString();
+    }
+}

src/main/java/net/tokishu/note/util/PasswordGenerator.java

@@ -1,13 +1,12 @@
-package net.tokishu.note.security;
+package net.tokishu.note.util;
 
-import org.springframework.stereotype.Service;
+import lombok.experimental.UtilityClass;
 
 import java.security.SecureRandom;
 
-@Service
-public class PasswordService {
-
-    private static final String CHARACTERS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
+@UtilityClass
+public class PasswordGenerator {
+    private static final String CHARACTERS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789*!$%&@";
     private static final SecureRandom RANDOM = new SecureRandom();
 
     public String generate(int length) {

src/main/resources/application.properties

@@ -1,7 +1,7 @@
 spring.application.name=notes
 spring.mvc.servlet.path=/api
 
-?Error
+# Error
 spring.mvc.throw-exception-if-no-handler-found=true
 spring.web.resources.add-mappings=false