lab4

4лаб
2023-06-01 15:51:35 +04:00 · 2023-05-25 08:06:05 +04:00
24 changed files with 678 additions and 462 deletions
--- a/build.gradle
+++ b/build.gradle
@ -19,6 +19,8 @@ dependencies {
 	implementation group: 'org.springdoc', name: 'springdoc-openapi-ui', version: '1.6.5'
    implementation 'org.jetbrains:annotations:24.0.0'
    implementation 'org.jetbrains:annotations:24.0.0'
+	implementation 'org.springframework.boot:spring-boot-starter-validation'
+	implementation 'org.hibernate.validator:hibernate-validator'
    testImplementation 'org.springframework.boot:spring-boot-starter-test'
 }

--- a/front/index.html
+++ b/front/index.html
@ -1,68 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-    <meta charset="UTF-8">
-    <title>LabWork04</title>
-    <script src="/node_modules/bootstrap/dist/js/bootstrap.min.js"></script>
-    <link rel="stylesheet" href="/node_modules/bootstrap/dist/css/bootstrap.min.css">
-</head>
-<body class="bg-light">
-    <div id="like_button_container"></div>
-<!--    <div class="container">-->
-<!--        <div class="py-5 text-center"><h2>Лабораторная работа 2</h2></div>-->
-<!--        <div class="row">-->
-<!--            <div>-->
-<!--                <form>-->
-<!--                    <div class="row">-->
-<!--                        <div class="col-md-6 mb-3">-->
-<!--                            <label for="input1">Значение 1 (string или double)</label>-->
-<!--                            <input class="form-control" id="input1" placeholder="Введите значение 1">-->
-<!--                        </div>-->
-<!--                        <div class="col-md-6 mb-3">-->
-<!--                            <label for="input1">Значение 2 (string или double)</label>-->
-<!--                            <input class="form-control" id="input2" placeholder="Введите значение 2">-->
-<!--                        </div>-->
-<!--                    </div>-->
-<!--                    <div class="row">-->
-<!--                        <div class="form-group">-->
-<!--                            <label for="operator">Выберите функцию</label>-->
-<!--                            <select class="form-control" id="operator">-->
-<!--                                <option value>Выбрать...</option>-->
-<!--                                <option value="Func1">(string, double)Сумма</option>-->
-<!--                                <option value="Func2">(double)Минимум, (string)Сумма в верхний регистр</option>-->
-<!--                                <option value="Func3">(double)Mаксимум, (string)Разделить</option>-->
-<!--                                <option value="Func4">(double)Число 1 в степени числа 2, (string)Сумма в нижний регистр</option>-->
-<!--                            </select>-->
-<!--                        </div>-->
-<!--                    </div>-->
-<!--                    <div class="row">-->
-<!--                        <div class="form-group">-->
-<!--                            <label for="operator">Выберите тип данных</label>-->
-<!--                            <select class="form-control" id="Type">-->
-<!--                                <option value>Выбрать...</option>-->
-<!--                                <option value="str">String</option>-->
-<!--                                <option value="double">Double</option>-->
-<!--                            </select>-->
-<!--                        </div>-->
-<!--                    </div>-->
-<!--                    <div class="row">-->
-<!--                        <div class="form-group">-->
-<!--                            <label for="result">Результат</label>-->
-<!--                            <input type="text" class="form-control result" id="result" readonly>-->
-<!--                            <hr class="mb-4">-->
-<!--                            <button type="button" class="btn btn-primary btn-block" onclick="calculate()">Посчитать</button>-->
-<!--                        </div>-->
-<!--                    </div>-->
-<!--                </form>-->
-<!--            </div>-->
-<!--        </div>-->
-<!--    </div>-->
-    <script src = "script.js"></script>
-    <!-- Загрузим React. -->
-    <script src="https://unpkg.com/react@18/umd/react.development.js" crossorigin></script>
-    <script src="https://unpkg.com/react-dom@18/umd/react-dom.development.js" crossorigin></script>
-
-    <!-- Загрузим наш React-компонент. -->
-    <script src="react.js"></script>
-</body>
-</html>
--- a/front/lab4/src/components/Album.vue
+++ b/front/lab4/src/components/Album.vue
@ -0,0 +1,137 @@
+<template>
+    <div v-if="currentAlbum" class="edit-form">
+      <h4>Album</h4>
+      <form>
+        <div class="form-group">
+          <label for="albumName">Album Name</label>
+          <input type="text" class="form-control" id="albumName"
+            v-model="currentAlbum.albumName"
+          />
+        </div>
+        <div class="form-group">
+          <label >Song</label>
+          <div>
+            <select v-model="currentAlbum.song">
+              <option v-for="blog in songs" :key="blog.id" :value="blog">{{ blog.nickName }}</option>
+            </select>
+          </div>
+        </div>
+        <div class="form-group prokrutka">
+          <label >Artists</label>
+          <div>
+            <template v-for="art in artists" v-bind:key="art.id">
+              <input type="checkbox"  v-bind:value="art" v-model="currentAlbum.artistList"/>
+              <label>{{ art.albumName }}</label><br/>
+            </template>
+          </div>
+        </div>
+        
+      </form>
+  
+      
+  
+      <button class="badge badge-danger mr-2"
+        @click="deleteAlbum"
+      >
+        Delete
+      </button>
+  
+      <button type="submit" class="badge badge-success"
+        @click="updateAlbum"
+      >
+        Update
+      </button>
+      <p>{{ message }}</p>
+    </div>
+  
+    <div v-else>
+      <br />
+      <p>Please click on a Album...</p>
+    </div>
+  </template>
+    <style>
+    .prokrutka {
+    height: 200px; 
+    width: 100%; 
+    background: #fff; 
+    border: 1px solid #C1C1C1; 
+    overflow-x: hidden; 
+    overflow-y:scroll; 
+    }
+    </style>
+  <script>
+  import AlbumDataService from '../services/AlbumDataService';
+  import ArtistDataService from '../services/ArtistDataService';
+  import SongDataService from '../services/SongDataService';
+
+  export default {
+    name: "album",
+    data() {
+      return {
+        currentAlbum: null,
+        artists : [],
+        songs : [],
+        message: ''
+      };
+    },
+    created() {
+      ArtistDataService.getAll()
+                .then(response => {
+                    this.artists = response.data;
+                    console.log(response.data);
+                });
+      SongDataService.getAll()
+                .then(response => {
+                  this.songs = response.data;
+                  console.log(response.data);
+                }
+                );
+        },
+    methods: {
+      getAlbum(id) {
+        AlbumDataService.get(id)
+          .then(response => {
+            this.currentAlbum = response.data;
+            console.log(response.data);
+          })
+          .artch(e => {
+            console.log(e);
+          });
+      },
+  
+      
+      updateAlbum() {
+        AlbumDataService.update(this.currentAlbum.id, this.currentAlbum)
+          .then(response => {
+            console.log(response.data);
+            this.message = 'The album was updated successfully!';
+          })
+          .artch(e => {
+            console.log(e);
+          });
+      },
+  
+      deleteAlbum() {
+        AlbumDataService.delete(this.currentAlbum.id)
+          .then(response => {
+            console.log(response.data);
+            this.$router.push({ name: "albums" });
+          })
+          .artch(e => {
+            console.log(e);
+          });
+      }
+    },
+    mounted() {
+      this.message = '';
+      this.getAlbum(this.$route.params.id);
+    }
+  };
+  </script>
+  
+  <style>
+  .edit-form {
+    max-width: 300px;
+    margin: auto;
+  }
+  </style>
--- a/front/lab4/src/services/AlbumDataService.js
+++ b/front/lab4/src/services/AlbumDataService.js
@ -0,0 +1,25 @@
+import axios from "../http-common";
+class AlbumDataService {
+
+  getAll() {
+    return axios.get( "/albums");
+  }
+
+  get(id) {
+    return axios.get( `/albums/${id}`);
+  }
+
+  create(data) {
+    return axios.post( `/albums`, data);
+  }
+
+  update(id, data) {
+    return axios.put(`/albums/${id}`, data);
+  }
+
+  delete(id) {
+    return axios.delete(`/albums/${id}`);
+  }
+}
+
+export default new AlbumDataService();
--- a/front/lab4/src/services/ArtistDataService.js
+++ b/front/lab4/src/services/ArtistDataService.js
@ -0,0 +1,25 @@
+import axios from "../http-common";
+class ArtistDataService {
+
+  getAll() {
+    return axios.get( "/artists");
+  }
+
+  get(id) {
+    return axios.get( `/artists/${id}`);
+  }
+
+  create(data) {
+    return axios.post( `/artists`, data);
+  }
+
+  update(id, data) {
+    return axios.put(`/artists/${id}`, data);
+  }
+
+  delete(id) {
+    return axios.delete(`/artists/${id}`);
+  }
+}
+
+export default new ArtistDataService();
--- a/front/lab4/src/services/SongDataService.js
+++ b/front/lab4/src/services/SongDataService.js
@ -0,0 +1,25 @@
+import axios from "../http-common";
+class SongDataService {
+
+  getAll() {
+    return axios.get( "/songs");
+  }
+
+  get(id) {
+    return axios.get( `/songs/${id}`);
+  }
+
+  create(data) {
+    return axios.post( `/songs`, data);
+  }
+
+  update(id, data) {
+    return axios.put(`/songs/${id}`, data);
+  }
+
+  delete(id) {
+    return axios.delete(`/songs/${id}`);
+  }
+}
+
+export default new SongDataService();
--- a/front/package.json
+++ b/front/package.json
@ -1,15 +1,50 @@
 {
-  "name": "IP",
-  "version": "1.0.0",
-  "main": "index.html",
+  "name": "front",
+  "version": "0.1.0",
+  "private": true,
  "scripts": {
-    "start": "http-server -p 3001 ./",
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "serve": "vue-cli-service serve",
+    "build": "vue-cli-service build",
+    "lint": "vue-cli-service lint"
  },
  "dependencies": {
-    "bootstrap": "5.2.1"
+    "axios": "^1.4.0",
+    "bootstrap": "^4.6.0",
+    "core-js": "^3.8.3",
+    "jquery": "^3.6.4",
+    "popper.js": "^1.16.1",
+    "vue": "^3.2.13",
+    "vue-router": "^4.1.6"
  },
  "devDependencies": {
-    "http-server": "^14.1.1"
+    "@babel/core": "^7.12.16",
+    "@babel/eslint-parser": "^7.12.16",
+    "@vue/cli-plugin-babel": "~5.0.0",
+    "@vue/cli-plugin-eslint": "~5.0.0",
+    "@vue/cli-service": "~5.0.0",
+    "eslint": "^7.32.0",
+    "eslint-plugin-vue": "^8.0.3"
+  },
+  "eslintConfig": {
+    "root": true,
+    "env": {
+      "node": true
+    },
+    "extends": [
+      "plugin:vue/vue3-essential",
+      "eslint:recommended"
+    ],
+    "parserOptions": {
+      "parser": "@babel/eslint-parser"
+    },
+    "rules": {
+      "vue/multi-word-component-names": 0
    }
+  },
+  "browserslist": [
+    "> 1%",
+    "last 2 versions",
+    "not dead",
+    "not ie 11"
+  ]
 }
--- a/front/react.js
+++ b/front/react.js
@ -1,25 +0,0 @@
-'use strict';
-
-const e = React.createElement;
-
-class LikeButton extends React.Component {
-    constructor(props) {
-        super(props);
-        this.state = { liked: false };
-    }
-
-    render() {
-        if (this.state.liked) {
-            return 'You liked this.';
-        }
-
-        return e(
-            'button',
-            { onClick: () => this.setState({ liked: true }) },
-            'Like'
-        );
-    }
-}
-const domContainer = document.querySelector('#like_button_container');
-const root = ReactDOM.createRoot(domContainer);
-root.render(e(LikeButton));
--- a/front/script.js
+++ b/front/script.js
@ -1,13 +0,0 @@
-'use strict'
-async function calculate(){
-    let num1 = document.getElementById("input1").value
-    let num2 = document.getElementById("input2").value
-    let operator = document.getElementById("operator").value
-    let result = document.getElementById("result")
-    let type = document.getElementById("Type").value
-
-
-    let response = await fetch(`http://localhost:8080/${operator}?Type=${type}&value1=${num1}&value2=${num2}`)
-    let res = await response.text()
-    result.value = res
-}
--- a/src/main/java/ru/ulstu/is/sbapp/controllers/AlbumController.java
+++ b/src/main/java/ru/ulstu/is/sbapp/controllers/AlbumController.java
@ -1,43 +1,55 @@
 package ru.ulstu.is.sbapp.controllers;

-import org.springframework.validation.annotation.Validated;
+import jakarta.validation.Valid;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
 import ru.ulstu.is.sbapp.database.service.AlbumService;

+import java.util.ArrayList;
 import java.util.List;

@RestController
@RequestMapping("/album")
 public class AlbumController {
    private final AlbumService albumService;
+    @Autowired
    public AlbumController(AlbumService albumService){
        this.albumService = albumService;
    }
-    @PostMapping
-    public AlbumDTO addAlbum(@RequestBody @Validated AlbumDTO albumDTO){
-        return new AlbumDTO(albumService.addAlbum(albumDTO));
-    }
-    @PutMapping("/{id}")
-    public AlbumDTO updateAlbum(@PathVariable Long id, @RequestBody @Validated AlbumDTO albumDTO){
-        return new AlbumDTO(albumService.updateAlbum(id, albumDTO));
-    }
-    @DeleteMapping("/{id}")
-    public AlbumDTO removeAlbum(@PathVariable Long id){
-        return new AlbumDTO(albumService.deleteAlbum(id));
-    }
-    @DeleteMapping
-    public void removeAllAlbums(){
-        albumService.deleteAllAlbums();
-    }
-    @GetMapping("/{id}")
-    public AlbumDTO findAlbum(@PathVariable Long id){
+    @GetMapping("/albums/{id}")
+    public AlbumDTO getAlbum(@PathVariable Long id) {
        return new AlbumDTO(albumService.findAlbum(id));
    }
-    @GetMapping
-    public List<AlbumDTO> findAllAlbums(){
-        return albumService.findAllAlbums()
-                .stream()
-                .map(x -> new AlbumDTO(x))
-                .toList();
+    @GetMapping("/albums")
+    public List<AlbumDTO> getAlbums() {
+        return albumService.findAllAlbums().stream().map(AlbumDTO::new).toList();
+    }
+    @PostMapping("/albums")
+    public ResponseEntity<AlbumDTO> createAlbum(@RequestBody @Valid AlbumDTO albumDTO){
+        List<Long> list = new ArrayList<>();
+        for (ArtistDTO art:
+                albumDTO.getArtistList()) {
+            list.add(art.getId());
+        }
+        return new ResponseEntity<>
+                (new AlbumDTO(albumService.addAlbum
+                        (albumDTO.getAlbumName(),list)), HttpStatus.OK);
+    }
+    @PutMapping("/albums/{id}")
+    public ResponseEntity<AlbumDTO> updateAlbum(@RequestBody @Valid AlbumDTO albumDTO){
+        List<Long> list = new ArrayList<>();
+        for (ArtistDTO art:
+                albumDTO.getArtistList()) {
+            list.add(art.getId());
+        }
+        return new ResponseEntity<>
+                (new AlbumDTO(albumService.updateAlbum
+                        (albumDTO.getId(), albumDTO.getAlbumName(), list)), HttpStatus.OK);
+    }
+    @DeleteMapping("/albums/{id}")
+    public AlbumDTO deleteAlbum(@PathVariable Long id){
+        return new AlbumDTO(albumService.deleteAlbum(id));
    }
 }
--- a/src/main/java/ru/ulstu/is/sbapp/controllers/AlbumDTO.java
+++ b/src/main/java/ru/ulstu/is/sbapp/controllers/AlbumDTO.java
@ -1,38 +1,41 @@
 package ru.ulstu.is.sbapp.controllers;

+import com.fasterxml.jackson.annotation.JsonProperty;
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
+import jakarta.validation.constraints.Null;
 import ru.ulstu.is.sbapp.database.model.Album;

 import java.util.List;

 public class AlbumDTO {
-    private long id;
-    private String albumName;
-    private List<SongDTO> songDTOList;
-    private List<ArtistDTO> artistDTOList;
+    @NotNull(message = "Id can't be null")
+    private final Long id;
+    @NotBlank(message = "Name can't be null or empty")
+    private final String albumName;
+    @Null
+    private final List<ArtistDTO> artistList;
    public AlbumDTO(Album album){
        this.id = album.getId();
        this.albumName = album.getAlbumName();
-        this.artistDTOList = album.getArtists() == null ? null : album.getArtists()
-                .stream()
-                .filter(x -> x.getAlbum().contains(album))
-                .map(ArtistDTO::new)
-                .toList();
-        this.songDTOList = album.getSongs() == null ? null : album.getSongs()
-                .stream()
-                .map(SongDTO::new)
-                .toList();
+        this.artistList = album.getArtists().stream().map(ArtistDTO::new).toList();
    }
-    public AlbumDTO(){}
-    public long getId() {
+    public AlbumDTO(Long id, String albumName, List<ArtistDTO> artistList){
+        this.id = id;
+        this.albumName = albumName;
+        this.artistList = artistList;
+    }
+    public Long getId() {
        return id;
    }
    public String getAlbumName(){
        return albumName;
    }
-    public List<SongDTO> getSongDTOList(){
-        return songDTOList;
+    public List<ArtistDTO> getArtistList(){
+        return artistList;
    }
-    public List<ArtistDTO> getArtistDTOList(){
-        return artistDTOList;
+    @JsonProperty(access = JsonProperty.Access.READ_ONLY)
+    public String getData() {
+        return String.format("%s %s %s", id, albumName, artistList.toString());
    }
 }
--- a/src/main/java/ru/ulstu/is/sbapp/controllers/ArtistController.java
+++ b/src/main/java/ru/ulstu/is/sbapp/controllers/ArtistController.java
@ -1,6 +1,9 @@
 package ru.ulstu.is.sbapp.controllers;

-import org.springframework.validation.annotation.Validated;
+import jakarta.validation.Valid;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
 import ru.ulstu.is.sbapp.database.service.ArtistService;

@ -10,45 +13,32 @@ import java.util.List;
@RequestMapping("/artist")
 public class ArtistController {
    private final ArtistService artistService;
+    @Autowired
    public ArtistController(ArtistService artistService){
        this.artistService = artistService;
    }
-    @PostMapping
-    public ArtistDTO addArtist(@RequestBody @Validated ArtistDTO artistDTO) {
-        return new ArtistDTO(artistService.addArtist(artistDTO));
-    }
-
-    @PutMapping("/{id}")
-    public ArtistDTO updateArtist(@PathVariable Long id,@RequestBody @Validated ArtistDTO artistDTO) {
-        return new ArtistDTO(artistService.updateArtist(id, artistDTO));
-    }
-
-    @DeleteMapping("/{id}")
-    public ArtistDTO removeArtist(@PathVariable Long id) {
-        return new ArtistDTO(artistService.deleteArtist(id));
-    }
-
-    @DeleteMapping
-    public void removeAllArtists() {
-        artistService.deleteAllArtists();
-    }
-
-    @GetMapping("/{id}")
-    public ArtistDTO findArtist(@PathVariable Long id) {
+    @GetMapping("/artists/{id}")
+    public ArtistDTO getArtist(@PathVariable Long id) {
        return new ArtistDTO(artistService.findArtist(id));
    }
-    @GetMapping("/worker/{id}")
-    public List<SongDTO> findSongsOnWorkplace(@PathVariable Long id){
-        return artistService.findAllSongsProducedArtist(id)
-                .stream()
-                .map(SongDTO::new)
-                .toList();
-    }
-    @GetMapping
-    public List<ArtistDTO> findAllArtist() {
-        return artistService.findAllArtists()
-                .stream()
+    @GetMapping("/artists")
+    public List<ArtistDTO> getArtists() {
+        return artistService.findAllArtists().stream()
                .map(ArtistDTO::new)
                .toList();
    }
+    @PostMapping("/artists")
+    public ResponseEntity<ArtistDTO> createArtist(@RequestBody @Valid ArtistDTO artistDTO) {
+        return new ResponseEntity<>(new ArtistDTO(artistService.addArtist(artistDTO.getArtistName(), artistDTO.getGenre())), HttpStatus.OK);
+    }
+
+    @PutMapping("/artists/{id}")
+    public ResponseEntity<ArtistDTO> updateArtist(@RequestBody @Valid  ArtistDTO artistDTO) {
+        return new ResponseEntity<>(new ArtistDTO(artistService.updateArtist(artistDTO.getId(), artistDTO.getArtistName(), artistDTO.getGenre())), HttpStatus.OK);
+    }
+
+    @DeleteMapping("/artists/{id}")
+    public ArtistDTO deleteArtist(@PathVariable Long id) {
+        return new ArtistDTO(artistService.deleteArtist(id));
+    }
 }
--- a/src/main/java/ru/ulstu/is/sbapp/controllers/ArtistDTO.java
+++ b/src/main/java/ru/ulstu/is/sbapp/controllers/ArtistDTO.java
@ -1,38 +1,35 @@
 package ru.ulstu.is.sbapp.controllers;

+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
 import ru.ulstu.is.sbapp.database.model.Artist;

 import java.util.List;

 public class ArtistDTO {
-    private long id;
-    private String artistName;
-    private String genre;
-    private List<AlbumDTO> albumDTOList;
+    @NotNull(message = "Id can't be null")
+    private final Long id;
+    @NotBlank(message = "Name can't be null or empty")
+    private final String artistName;
+    @NotBlank(message = "Genre can't be null or empty")
+    private final String genre;
    public ArtistDTO(Artist artist){
        this.id = artist.getId();
        this.artistName = artist.getArtistName();
        this.genre = artist.getGenre();
-        this.albumDTOList = artist.getAlbum() == null ? null : artist.getAlbum()
-                .stream()
-                .filter(x -> x.getArtists().contains(artist.getId()))
-                .map(y -> new AlbumDTO(y))
-                .toList();
    }
-    public ArtistDTO() {
+    public ArtistDTO(Long id, String artistName, String genre) {
+        this.id = id;
+        this.artistName = artistName;
+        this.genre = genre;
    }
-
-    public long getId() {
+    public Long getId() {
        return id;
    }
    public String getArtistName() {
        return artistName;
    }
-
    public String getGenre() {
        return genre;
    }
-    public List<AlbumDTO> getAlbumDTOList(){
-        return albumDTOList;
-    }
 }
--- a/src/main/java/ru/ulstu/is/sbapp/controllers/SongController.java
+++ b/src/main/java/ru/ulstu/is/sbapp/controllers/SongController.java
@ -1,6 +1,9 @@
 package ru.ulstu.is.sbapp.controllers;

-import org.springframework.validation.annotation.Validated;
+import jakarta.validation.Valid;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
 import ru.ulstu.is.sbapp.database.service.SongService;

@ -10,44 +13,34 @@ import java.util.List;
@RequestMapping("/song")
 public class SongController {
    private final SongService songService;
+    @Autowired
    public SongController(SongService songService){
        this.songService = songService;
    }
-    @PostMapping
-    public SongDTO addSong(@RequestBody @Validated SongDTO songDTO) {
-        return new SongDTO(songService.addSong(songDTO));
-    }
-
-    @PutMapping("/{id}")
-    public SongDTO updateSong(@PathVariable Long id,@RequestBody @Validated SongDTO songDTO) {
-        return new SongDTO(songService.updateSong(id, songDTO));
-    }
-
-    @DeleteMapping("/{id}")
-    public SongDTO removeSong(@PathVariable Long id) {
-        return new SongDTO(songService.deleteSong(id));
-    }
-
-    @DeleteMapping
-    public void removeAllSongs() {
-        songService.deleteAllSongs();
-    }
-
-    @GetMapping("/{id}")
-    public SongDTO findSong(@PathVariable Long id) {
+    @GetMapping("/songs/{id}")
+    public SongDTO getSong(@PathVariable Long id) {
        return new SongDTO(songService.findSong(id));
    }
-    @GetMapping("/workplace/{id}")
-    public List<SongDTO> findSongsOnWorkplace(@PathVariable Long id){
-        return songService.findSongsInAlbum(id).stream()
+    @GetMapping("/songs")
+    public List<SongDTO> getSongs() {
+        return songService.findAllSongs().stream()
                .map(SongDTO::new)
                .toList();
    }
-    @GetMapping
-    public List<SongDTO> findAllSong() {
-        return songService.findAllSongs()
-                .stream()
-                .map(x-> new SongDTO(x))
-                .toList();
+    @PostMapping("/songs")
+    public ResponseEntity<SongDTO> createSong(@RequestBody @Valid SongDTO songDTO) {
+        return new ResponseEntity<>
+                (new SongDTO(songService.addSong
+                        (songDTO.getSongName(), songDTO.getDuration(), songDTO.getAlbum().getId())), HttpStatus.OK);
+    }
+
+    @PutMapping("/song/{id}")
+    public ResponseEntity<SongDTO> updateSong(@RequestBody @Valid SongDTO songDTO) {
+        return new ResponseEntity<>(new SongDTO(songService.updateSong(songDTO.getId(), songDTO.getSongName(), songDTO.getDuration(), songDTO.getAlbum().getId())), HttpStatus.OK);
+    }
+
+    @DeleteMapping("/songs/{id}")
+    public SongDTO deleteSong(@PathVariable Long id) {
+        return new SongDTO(songService.deleteSong(id));
    }
 }
--- a/src/main/java/ru/ulstu/is/sbapp/controllers/SongDTO.java
+++ b/src/main/java/ru/ulstu/is/sbapp/controllers/SongDTO.java
@ -1,17 +1,30 @@
 package ru.ulstu.is.sbapp.controllers;

+import com.fasterxml.jackson.annotation.JsonProperty;
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
 import ru.ulstu.is.sbapp.database.model.Song;

 public class SongDTO {
-    private Long id;
-    private String songName;
-    private Double Duration;
+    @NotNull(message = "Id can't be null")
+    private final Long id;
+    @NotBlank(message = "Name can't be null or empty")
+    private final String songName;
+    @NotNull(message = "Album can't be null")
+    private final AlbumDTO album;
+    @NotBlank(message = "Duration can't be null or empty")
+    private final Double duration;
    public SongDTO(Song song){
        this.id = song.getId();
        this.songName = song.getSongName();
-        this.Duration = song.getSongDuration();
+        this.duration = song.getDuration();
+        this.album = new AlbumDTO(song.getAlbum());
    }
-    public SongDTO(){
+    public SongDTO(Long id, String songName, Double duration, AlbumDTO album){
+        this.id = id;
+        this.songName = songName;
+        this.duration = duration;
+        this.album = album;
    }
    public Long getId() {
        return id;
@ -19,7 +32,14 @@ public class SongDTO {
    public String getSongName(){
        return songName;
    }
-    public Double getSongDuration(){
-        return Duration;
+    public Double getDuration(){
+        return duration;
+    }
+    public AlbumDTO getAlbum() {
+        return album;
+    }
+    @JsonProperty(access = JsonProperty.Access.READ_ONLY)
+    public String getData() {
+        return String.format("%s %s %s %s", id, songName, duration, album.getAlbumName());
    }
 }
--- a/src/main/java/ru/ulstu/is/sbapp/database/model/Album.java
+++ b/src/main/java/ru/ulstu/is/sbapp/database/model/Album.java
@ -1,96 +1,93 @@
 package ru.ulstu.is.sbapp.database.model;

 import jakarta.persistence.*;
-import jakarta.validation.constraints.NotNull;
+import jakarta.validation.constraints.NotBlank;

 import java.util.ArrayList;
 import java.util.List;
 import java.util.Objects;

@Entity
-@Table(name = "album")
 public class Album {
    @Id
-    @GeneratedValue
-    private long id;
-    @NotNull(message = "Name can't be empty")
-    @Column(name = "name")
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+    @NotBlank
    private String albumName;
-    @OneToMany(cascade = {CascadeType.MERGE})
-    @JoinColumn(name = "songs", nullable = true)
+    @OneToMany(fetch = FetchType.EAGER,mappedBy = "album")
    private List<Song> songs;
-    @ManyToMany(cascade = { CascadeType.MERGE }, fetch = FetchType.EAGER)
+    @ManyToMany(fetch = FetchType.EAGER)
    @JoinTable(name = "albums_artists",
            joinColumns = @JoinColumn(name = "album_fk"),
            inverseJoinColumns = @JoinColumn(name = "artist_fk"))
    private List<Artist> artists;
-    public Album(){
-    }
-    public Album(String albumName, List<Artist> artists, List<Song> songs){
+    public Album(){}
+    public Album(String albumName){
        this.albumName = albumName;
-        this.artists = artists;
-        this.songs = songs;
    }
    public Long getId() {
        return id;
    }
-
-    public String getAlbumName() {
+    public String getAlbumName(){
        return albumName;
    }
+
    public void setAlbumName(String albumName) {
        this.albumName = albumName;
    }
-    public List<Artist> getArtists() {
+    public List<Artist> getArtists(){
        return artists;
    }
-    public List<Song> getSongs(){return songs;}
-    public void setArtists(List<Artist> artists) {
-        this.artists = artists;
-    }
-    public void setSongs(List<Song> songs) {
-        this.songs = songs;
-    }
-    public void update(Album album){
-        this.albumName = album.albumName;
-        this.artists = album.getArtists();
-    }
    public void addArtist(Artist artist){
-        if  (artists == null){
-            this.artists = new ArrayList<>();
-        }
-        if (!artists.contains(artist)) {
-            this.artists.add(artist);
+        if(artists==null)
+            artists=new ArrayList<>();
+        artists.add(artist);
        artist.addAlbum(this);
    }
+    public void setArtists(List<Artist> art){
+        this.artists=art;
    }    
    public void removeArtist(Artist artist){
-        if (artists.contains(artist)) {
-            this.artists.remove(artist);
+        if(artists!=null){
+            artists.remove(artist);
            artist.removeAlbum(this);
        }
    }
+    public List<Song> getSongs(){
+        return songs;
+    }
    public void addSong(Song song){
-        if  (songs == null){
-            this.songs = new ArrayList<>();
-        }
-        if (!songs.contains(song)) {
-            this.songs.add(song);
-        }
+        if(songs==null)
+            songs = new ArrayList<>();
+        songs.add(song);
    }
    public  void removeSong(Song song){
-        if (songs.contains(song)) {
-            this.songs.remove(song);
-        }
+        if(song!=null)
+            songs.remove(song);
    }
    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Album album = (Album) o;
+        if(!this.id.equals(album.getId())) return false;
+        if(!this.albumName.equals(album.getAlbumName())) return false;
+        if(artists.size() != album.getArtists().size()) return  false;
+        if(artists.size()>0){
+            for (Artist art:
+                    artists) {
+                boolean check = false;
+                for (Artist artAlb:
+                        album.getArtists()) {
+                    if(art.equals(artAlb))
+                        check = true;
+                }
+                if(!check)
+                    return false;
+            }
+        }
        return Objects.equals(id, album.id);
    }
-
    @Override
    public int hashCode() {
        return Objects.hash(id);
@ -100,7 +97,8 @@ public class Album {
    public String toString() {
        return "Album{" +
                "id=" + id +
-                ", albumName='" + albumName + '\'' +
+                ", Name='" + albumName + '\'' +
+                "Artists:" + (artists == null ? "[]" : artists.toString()) +
                '}';
    }
 }
--- a/src/main/java/ru/ulstu/is/sbapp/database/model/Artist.java
+++ b/src/main/java/ru/ulstu/is/sbapp/database/model/Artist.java
@ -1,7 +1,7 @@
 package ru.ulstu.is.sbapp.database.model;

 import jakarta.persistence.*;
-import jakarta.validation.constraints.NotNull;
+import jakarta.validation.constraints.NotBlank;

 import java.util.ArrayList;
 import java.util.List;
@ -10,73 +10,57 @@ import java.util.Objects;
@Entity
 public class Artist {
    @Id
-    @GeneratedValue
+    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
-    @NotNull(message = "Name can't be empty")
-    @Column(name = "artistName")
+    @NotBlank
    private String artistName;
-    @NotNull(message = "Genre can't be null or empty")
-    @Column(name = "genre")
+    @NotBlank
    private String genre;
-    @ManyToMany(mappedBy = "artists",cascade = CascadeType.MERGE, fetch = FetchType.EAGER)
-    private List<Album> album;
-    public Artist() {
-    }
+    @ManyToMany(fetch = FetchType.EAGER,mappedBy = "artists")
+    private List<Album> albums;

-    public Artist(String artistName, String genre) {
+    public Artist(){}
+    public Artist(String artistName, String genre){
        this.artistName = artistName;
        this.genre = genre;
    }
-
    public Long getId() {
        return id;
    }
-
-    public String getArtistName() {
+    public String getArtistName(){
        return artistName;
    }
-
-    public void setArtistName(String artistName) {
-        this.artistName = artistName;
+    public void setArtistName(String value){
+        artistName=value;
    }
-
-    public String getGenre() {
+    public String getGenre(){
        return genre;
    }
-
-    public void setGenre(String genre) {
-        this.genre = genre;
+    public void setGenre(String value){
+        genre=value;
    }
-
-    public List<Album> getAlbum() {
-        return album;
+    public List<Album> getAlbums(){
+        return albums;
    }
-
-    public void setAlbum(List<Album> album) {
-        this.album = album;
+    public void addAlbum(Album album){
+        if(albums==null)
+            albums = new ArrayList<>();
+        albums.add(album);
    }
-
-    public void addAlbum(Album album) {
-        if (this.album == null) {
-            this.album = new ArrayList<>();
+    public void removeAlbum(Album album){
+        if(album!=null)
+            albums.remove(album);
    }
-        if (!this.album.contains(album))
-            this.album.add(album);
-    }
-
-    public void removeAlbum(Album album) {
-        if (this.album.contains(album))
-            this.album.remove(album);
-    }
-
    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Artist artist = (Artist) o;
+        if(!this.artistName.equals(artist.getArtistName())) return false;
+        if(!this.genre.equals(artist.getGenre())) return false;
+        if(this.id != artist.getId()) return false;
        return Objects.equals(id, artist.id);
    }
-
    @Override
    public int hashCode() {
        return Objects.hash(id);
@ -86,8 +70,8 @@ public class Artist {
    public String toString() {
        return "Artist{" +
                "id=" + id +
-                ", artistName='" + artistName + '\'' +
-                ", genre='" + genre + '\'' +
+                ", Name='" + artistName + '\'' +
+                ", Genre='" + genre + '\'' +
                '}';
    }
 }
--- a/src/main/java/ru/ulstu/is/sbapp/database/model/Song.java
+++ b/src/main/java/ru/ulstu/is/sbapp/database/model/Song.java
@ -1,6 +1,7 @@
 package ru.ulstu.is.sbapp.database.model;

 import jakarta.persistence.*;
+import jakarta.validation.constraints.NotBlank;
 import jakarta.validation.constraints.NotNull;

 import java.util.Objects;
@ -9,39 +10,50 @@ import java.util.Objects;
@Table(name = "song")
 public class Song {
    @Id
-    @GeneratedValue
+    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
-    @NotNull(message = "Name can't be empty")
-    @Column(name = "name")
+    @NotBlank
    private String songName;
-    @NotNull(message = "Duration can't be empty")
-    @Column(name = "duration")
-    private Double Duration;
-    public Song(){
+    @NotBlank
+    private Double duration;
+    @NotNull
+    @ManyToOne
+    private Album album;
+    public Song(){}
+    public Song(String songName, Double duration){
+        this.songName=songName;
+        this.duration=duration;
    }
-    public Song(String songName, Double Duration){
-        this.songName = songName;
-        this.Duration = Duration;
+    public Long getId() {
+        return id;
    }
-    public Long getId(){return id;}
    public String getSongName(){
        return songName;
    }
-    public Double getSongDuration(){
-        return Duration;
-    }

    public void setSongName(String songName) {
        this.songName = songName;
    }
-
-    public void setSongDuration(Double Duration) {
-        this.Duration = Duration;
+    public Double getDuration(){return duration;}
+    public void setDuration(Double duration) {
+        this.duration = duration;
    }
+    public Album getAlbum() {
+        return album;
+    }
+    public void setAlbum(Album value){
+        album=value;
+        album.addSong(this);
+    }
+    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Song song = (Song) o;
+        if(!this.id.equals(song.getId())) return false;
+        if(!this.songName.equals(song.getSongName())) return false;
+        if(!this.duration.equals(song.getDuration())) return false;
+        if(!this.album.getId().equals(song.getAlbum().getId())) return false;
        return Objects.equals(id, song.id);
    }
    @Override
@ -54,7 +66,7 @@ public class Song {
        return "Song{" +
                "id=" + id +
                ", songName='" + songName + '\'' +
-                ", Duration='" + Duration + '\'' +
+                ", Duration='" + duration + '\'' +
                '}';
    }
 }
--- a/src/main/java/ru/ulstu/is/sbapp/database/service/AlbumService.java
+++ b/src/main/java/ru/ulstu/is/sbapp/database/service/AlbumService.java
@ -3,51 +3,45 @@ package ru.ulstu.is.sbapp.database.service;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import ru.ulstu.is.sbapp.Repository.IAlbumRepository;
-import ru.ulstu.is.sbapp.controllers.AlbumDTO;
 import ru.ulstu.is.sbapp.database.model.Album;
 import ru.ulstu.is.sbapp.database.model.Artist;
-import ru.ulstu.is.sbapp.database.model.Song;
+import ru.ulstu.is.sbapp.database.util.validation.ValidatorUtil;

+import java.util.ArrayList;
 import java.util.List;
 import java.util.Optional;

@Service
 public class AlbumService {
+
    private final IAlbumRepository albumRepository;
+    private final ValidatorUtil validatorUtil;
    private final  ArtistService artistService;
-    private final SongService songService;
-    public AlbumService(IAlbumRepository albumRepository,
-                            ArtistService artistService,
-                            SongService songService
-    ){
+
+    public AlbumService(IAlbumRepository albumRepository, ValidatorUtil validatorUtil, ArtistService artistService){
        this.albumRepository = albumRepository;
+        this.validatorUtil = validatorUtil;
        this.artistService = artistService;
-        this.songService = songService;
    }

    @Transactional
-    public Album addAlbum(AlbumDTO albumDTO) {
+    public Album addAlbum(String albumName, List<Long> artistsId) {
+        final Album album = new Album(albumName);
+        if(artistsId.size() > 0 )
+        {
+            for (Long id:
+                    artistsId) {
+                Artist art = artistService.findArtist(id);
+                album.addArtist(art);
+            }
+        }
+        else
+            album.setArtists(new ArrayList<>());
+        validatorUtil.validate(album);

-        List<Artist> artists = artistService.findAllArtistsById(albumDTO);
-        List<Song> songs = songService.findAllSongById(albumDTO);
+        return albumRepository.save(album);
+    }

-        final Album album = new Album(
-                albumDTO.getAlbumName(), artists, songs);
-        albumRepository.save(album);
-        return album;
-    }
-    @Transactional
-    public Album addSong(AlbumDTO albumDTO, List<Song> songs){
-        final Album currentAlbum = findAlbum(albumDTO.getId());
-        currentAlbum.setSongs(songs);
-        return currentAlbum;
-    }
-    @Transactional
-    public Album addArtist(AlbumDTO albumDTO, List<Artist> artists){
-        final Album currentAlbum = findAlbum(albumDTO.getId());
-        currentAlbum.setArtists(artists);
-        return currentAlbum;
-    }
    @Transactional(readOnly = true)
    public Album findAlbum(Long id) {
        final Optional<Album> album = albumRepository.findById(id);
@ -59,24 +53,31 @@ public class AlbumService {
    }

    @Transactional
-    public Album updateAlbum(Long id, AlbumDTO albumDTO) {
+    public Album updateAlbum(Long id, String albumName, List<Long> artistIds) {
        final Album currentAlbum = findAlbum(id);
-        currentAlbum.setAlbumName(albumDTO.getAlbumName());
-
-        List<Artist> newArtists = artistService.findAllArtistsById(albumDTO);
-        List<Song> newSongs = songService.findAllSongById(albumDTO);
-
-        currentAlbum.setArtists(newArtists);
-        currentAlbum.setSongs(newSongs);
-        albumRepository.save(currentAlbum);
-        return currentAlbum;
+        currentAlbum.setAlbumName(albumName);
+        if(artistIds.size()>0)
+        {
+            currentAlbum.getArtists().clear();
+            for (Long ArtId:
+                    artistIds) {
+                Artist art = artistService.findArtist(ArtId);
+                currentAlbum.addArtist(art);
            }
+        }
+        else
+            currentAlbum.getArtists().clear();
+        validatorUtil.validate(currentAlbum);
+        return albumRepository.save(currentAlbum);
+    }
+
    @Transactional
    public Album deleteAlbum(Long id) {
        final Album currentAlbum = findAlbum(id);
        albumRepository.delete(currentAlbum);
        return currentAlbum;
    }
+
    @Transactional
    public void deleteAllAlbums() {
        albumRepository.deleteAll();
--- a/src/main/java/ru/ulstu/is/sbapp/database/service/ArtistService.java
+++ b/src/main/java/ru/ulstu/is/sbapp/database/service/ArtistService.java
@ -3,72 +3,57 @@ package ru.ulstu.is.sbapp.database.service;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import ru.ulstu.is.sbapp.Repository.IArtistRepository;
-import ru.ulstu.is.sbapp.controllers.AlbumDTO;
-import ru.ulstu.is.sbapp.controllers.ArtistDTO;
-import ru.ulstu.is.sbapp.database.model.Album;
 import ru.ulstu.is.sbapp.database.model.Artist;
-import ru.ulstu.is.sbapp.database.model.Song;
+import ru.ulstu.is.sbapp.database.util.validation.ValidatorUtil;

 import java.util.List;
 import java.util.Optional;

@Service
 public class ArtistService {
+
    private final IArtistRepository artistRepository;
-    public ArtistService(IArtistRepository artistRepository){
+    private final ValidatorUtil validatorUtil;
+
+    public ArtistService(IArtistRepository artistRepository,
+                           ValidatorUtil validatorUtil) {
        this.artistRepository = artistRepository;
+        this.validatorUtil = validatorUtil;
    }
    @Transactional
-    public Artist addArtist(ArtistDTO artistDTO) {
-        Artist artist =new Artist(artistDTO.getArtistName(), artistDTO.getGenre());
-        artistRepository.save(artist);
-        return artist;
+    public Artist addArtist(String artistName, String genre) {
+        final Artist artist = new Artist(artistName, genre);
+        validatorUtil.validate(artist);
+        return artistRepository.save(artist);
    }
+
    @Transactional(readOnly = true)
    public Artist findArtist(Long id) {
        final Optional<Artist> artist = artistRepository.findById(id);
-        return artist.orElseThrow(()->new ArtistNotFoundException(id));
+        return artist.orElseThrow(() -> new ArtistNotFoundException(id));
    }

    @Transactional(readOnly = true)
    public List<Artist> findAllArtists() {
        return artistRepository.findAll();
    }
-    @Transactional(readOnly = true)
-    public List<Artist> findAllArtistsById(AlbumDTO albumDTO) {
-        return artistRepository
-                .findAllById(albumDTO
-                        .getArtistDTOList()
-                        .stream()
-                        .map(x -> x.getId())
-                        .toList());
-    }

    @Transactional
-    public Artist updateArtist(Long id, ArtistDTO artistDTO) {
+    public Artist updateArtist(Long id, String artistName, String genre) {
        final Artist currentArtist = findArtist(id);
-        currentArtist.setArtistName(artistDTO.getArtistName());
-        currentArtist.setGenre(artistDTO.getGenre());
-        artistRepository.save(currentArtist);
-        return currentArtist;
+        currentArtist.setArtistName(artistName);
+        currentArtist.setGenre(genre);
+        validatorUtil.validate(currentArtist);
+        return artistRepository.save(currentArtist);
    }

    @Transactional
    public Artist deleteArtist(Long id) {
-        final Artist currentArtist= findArtist(id);
-        int size = currentArtist.getAlbum().size();
-        for (int i = 0; i < size; i++) {
-            Album temp = currentArtist.getAlbum().get(i);
-            temp.removeArtist(currentArtist);
-            currentArtist.removeAlbum(temp);
-        }
+        final Artist currentArtist = findArtist(id);
        artistRepository.delete(currentArtist);
        return currentArtist;
    }
-    @Transactional
-    public List<Song> findAllSongsProducedArtist(Long id){
-        return artistRepository.getSongs(findArtist(id));
-    }
+
    @Transactional
    public void deleteAllArtists() {
        artistRepository.deleteAll();
--- a/src/main/java/ru/ulstu/is/sbapp/database/service/SongService.java
+++ b/src/main/java/ru/ulstu/is/sbapp/database/service/SongService.java
@ -3,53 +3,55 @@ package ru.ulstu.is.sbapp.database.service;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import ru.ulstu.is.sbapp.Repository.ISongRepository;
-import ru.ulstu.is.sbapp.controllers.SongDTO;
-import ru.ulstu.is.sbapp.controllers.AlbumDTO;
+import ru.ulstu.is.sbapp.database.model.Album;
 import ru.ulstu.is.sbapp.database.model.Song;
+import ru.ulstu.is.sbapp.database.util.validation.ValidatorUtil;

 import java.util.List;
 import java.util.Optional;

@Service
 public class SongService {
+
    private final ISongRepository songRepository;
-    public SongService(ISongRepository songRepository){
+    private final ValidatorUtil validatorUtil;
+    private final AlbumService albumService;
+
+    public SongService(ISongRepository songRepository, ValidatorUtil validatorUtil, AlbumService albumService){
        this.songRepository = songRepository;
+        this.validatorUtil = validatorUtil;
+        this.albumService = albumService;
    }
+
    @Transactional
-    public Song addSong(SongDTO songDTO) {
-        final Song song = new Song(songDTO.getSongName(), songDTO.getSongDuration());
-        songRepository.save(song);
-        return song;
+    public Song addSong(String songName, Double duration, Long albumId){
+        final Song song = new Song(songName,duration);
+        Album curAlbum = albumService.findAlbum(albumId);
+        song.setAlbum(curAlbum);
+        validatorUtil.validate(song);
+        return songRepository.save(song);
    }
+
    @Transactional(readOnly = true)
    public Song findSong(Long id) {
        final Optional<Song> song = songRepository.findById(id);
-        return song.orElseThrow(()->new SongNotFoundException(id));
-    }
-    @Transactional(readOnly = true)
-    public List<Song> findAllSongById(AlbumDTO albumDTO) {
-        return songRepository
-                .findAllById(albumDTO
-                        .getSongDTOList()
-                        .stream()
-                        .map(x->x.getId())
-                        .toList());
+        return song.orElseThrow(() -> new SongNotFoundException(id));
    }

    @Transactional(readOnly = true)
    public List<Song> findAllSongs() {
-        return songRepository
-                .findAll();
+        return songRepository.findAll();
    }

    @Transactional
-    public Song updateSong(Long id, SongDTO song) {
+    public Song updateSong(Long id, String songName, Double duration, Long albumId) {
        final Song currentSong = findSong(id);
-        currentSong.setSongName(song.getSongName());
-        currentSong.setSongDuration(song.getSongDuration());
-        songRepository.save(currentSong);
-        return currentSong;
+        currentSong.setSongName(songName);
+        currentSong.setDuration(duration);
+        Album curAlbum = albumService.findAlbum(albumId);
+        currentSong.setAlbum(curAlbum);
+        validatorUtil.validate(currentSong);
+        return songRepository.save(currentSong);
    }

    @Transactional
@ -59,11 +61,6 @@ public class SongService {
        return currentSong;
    }

-    @Transactional
-    public List<Song> findSongsInAlbum(Long id){
-        return songRepository.findSongsInAlbum(findSong(id));
-    }
-
    @Transactional
    public void deleteAllSongs() {
        songRepository.deleteAll();
--- a/src/main/java/ru/ulstu/is/sbapp/database/util/error/AdviceController.java
+++ b/src/main/java/ru/ulstu/is/sbapp/database/util/error/AdviceController.java
@ -0,0 +1,42 @@
+package ru.ulstu.is.sbapp.database.util.error;
+
+import org.springframework.context.support.DefaultMessageSourceResolvable;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.MethodArgumentNotValidException;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import ru.ulstu.is.sbapp.database.service.AlbumNotFoundException;
+import ru.ulstu.is.sbapp.database.service.ArtistNotFoundException;
+import ru.ulstu.is.sbapp.database.service.SongNotFoundException;
+import ru.ulstu.is.sbapp.database.util.validation.ValidationException;
+
+import java.util.stream.Collectors;
+
+@ControllerAdvice
+public class AdviceController {
+    @ExceptionHandler({
+            AlbumNotFoundException.class,
+            ArtistNotFoundException.class,
+            SongNotFoundException.class,
+            ValidationException.class
+    })
+    public ResponseEntity<Object> handleException(Throwable e) {
+        return new ResponseEntity<>(e.getMessage(), HttpStatus.BAD_REQUEST);
+    }
+
+    @ExceptionHandler(MethodArgumentNotValidException.class)
+    public ResponseEntity<Object> handleBindException(MethodArgumentNotValidException e) {
+        final ValidationException validationException = new ValidationException(
+                e.getBindingResult().getAllErrors().stream()
+                        .map(DefaultMessageSourceResolvable::getDefaultMessage)
+                        .collect(Collectors.toSet()));
+        return handleException(validationException);
+    }
+
+    @ExceptionHandler(Exception.class)
+    public ResponseEntity<Object> handleUnknownException(Throwable e) {
+        e.printStackTrace();
+        return new ResponseEntity<>(e.getMessage(), HttpStatus.INTERNAL_SERVER_ERROR);
+    }
+}
--- a/src/main/java/ru/ulstu/is/sbapp/database/util/validation/ValidationException.java
+++ b/src/main/java/ru/ulstu/is/sbapp/database/util/validation/ValidationException.java
@ -0,0 +1,9 @@
+package ru.ulstu.is.sbapp.database.util.validation;
+
+import java.util.Set;
+
+public class ValidationException extends RuntimeException {
+    public ValidationException(Set<String> errors) {
+        super(String.join("\n", errors));
+    }
+}
--- a/src/main/java/ru/ulstu/is/sbapp/database/util/validation/ValidatorUtil.java
+++ b/src/main/java/ru/ulstu/is/sbapp/database/util/validation/ValidatorUtil.java
@ -0,0 +1,30 @@
+package ru.ulstu.is.sbapp.database.util.validation;
+
+import jakarta.validation.ConstraintViolation;
+import jakarta.validation.Validation;
+import jakarta.validation.Validator;
+import jakarta.validation.ValidatorFactory;
+import org.springframework.stereotype.Component;
+
+import java.util.Set;
+import java.util.stream.Collectors;
+
+@Component
+public class ValidatorUtil {
+    private final Validator validator;
+
+    public ValidatorUtil() {
+        try (ValidatorFactory factory = Validation.buildDefaultValidatorFactory()) {
+            this.validator = factory.getValidator();
+        }
+    }
+
+    public <T> void validate(T object) {
+        final Set<ConstraintViolation<T>> errors = validator.validate(object);
+        if (!errors.isEmpty()) {
+            throw new ValidationException(errors.stream()
+                    .map(ConstraintViolation::getMessage)
+                    .collect(Collectors.toSet()));
+        }
+    }
+}
Author	SHA1	Message	Date
Татьяна Артамонова	9787e46afa	lab4	2023-06-01 15:51:35 +04:00
Татьяна Артамонова	f1975493d3	4лаб	2023-05-25 08:06:05 +04:00