Yana P

postify/pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>4.0.6</version>
+		<version>3.2.5</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>net.hackyourfuture.backend.week6</groupId>
@@ -27,14 +27,28 @@
 		<url/>
 	</scm>
 	<properties>
-		<java.version>25</java.version>
+		<java.version>21</java.version>
 	</properties>
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>org.testcontainers</groupId>
+				<artifactId>testcontainers-bom</artifactId>
+				<version>1.19.7</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
 	<dependencies>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter-webmvc</artifactId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-jdbc</artifactId>
 		</dependency>
-
 		<dependency>
 			<groupId>org.postgresql</groupId>
 			<artifactId>postgresql</artifactId>
@@ -45,11 +59,22 @@
 			<artifactId>lombok</artifactId>
 			<optional>true</optional>
 		</dependency>
+		<dependency>
+			<groupId>org.testcontainers</groupId>
+			<artifactId>junit-jupiter</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.testcontainers</groupId>
+			<artifactId>postgresql</artifactId>
+			<scope>test</scope>
+		</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter-webmvc-test</artifactId>
+			<artifactId>spring-boot-starter-test</artifactId>
 			<scope>test</scope>
 		</dependency>
+
 	</dependencies>
 
 	<build>

postify/src/main/java/net/hackyourfuture/backend/week6/postify/DBConnectionCheck.java

@@ -0,0 +1,20 @@
+package net.hackyourfuture.backend.week6.postify;
+
+import org.springframework.boot.context.event.ApplicationReadyEvent;
+import org.springframework.context.event.EventListener;
+import org.springframework.jdbc.core.JdbcTemplate;
+
+public class DBConnectionCheck {
+
+    private final JdbcTemplate jdbcTemplate;
+
+    public DBConnectionCheck(JdbcTemplate jdbcTemplate){
+        this.jdbcTemplate = jdbcTemplate;
+    }
+
+    @EventListener(ApplicationReadyEvent.class)
+    public void checkConnection(){
+        String result = this.jdbcTemplate.queryForObject("SELECT 'connected'", String.class);
+        System.out.println("Database status: " + result);
+    }
+}

postify/src/main/java/net/hackyourfuture/backend/week6/postify/client/LyricsApiConfiguration.java

@@ -0,0 +1,23 @@
+package net.hackyourfuture.backend.week6.postify.client;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.MediaType;
+import org.springframework.web.client.RestClient;
+
+@Configuration
+public class LyricsApiConfiguration {
+
+    @Bean
+    public RestClient.Builder restClientBuilder() {
+        return RestClient.builder();
+    }
+
+    @Bean
+    public RestClient lyricsRestClient(RestClient.Builder builder){
+        return builder.baseUrl("https://api.lyrics.ovh")
+                .defaultHeader(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE)
+                .build();
+    }
+}

postify/src/main/java/net/hackyourfuture/backend/week6/postify/client/LyricsClient.java

@@ -0,0 +1,30 @@
+package net.hackyourfuture.backend.week6.postify.client;
+
+import net.hackyourfuture.backend.week6.postify.dto.response.lyric.LyricApiResponse;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.stereotype.Service;
+import org.springframework.web.client.HttpClientErrorException;
+import org.springframework.web.client.RestClient;
+
+@Service
+public class LyricsClient {
+    private final RestClient lyricsRestClient;
+
+    public LyricsClient(@Qualifier("lyricsRestClient") RestClient lyricsRestClient){
+        this.lyricsRestClient = lyricsRestClient;
+    }
+
+    public LyricApiResponse getLyrics(String artistName, String trackTitle){
+        try {
+            return lyricsRestClient.get()
+                    .uri(uriBuilder -> uriBuilder
+                            .path("/v1/{artist}/{title}")
+                            .build(artistName, trackTitle))
+                    .retrieve()
+                    .body(LyricApiResponse.class);
+        } catch(HttpClientErrorException.NotFound ex){
+            return null;
+        }
+
+    }
+}

postify/src/main/java/net/hackyourfuture/backend/week6/postify/controllers/TrackLyricsController.java

@@ -0,0 +1,23 @@
+package net.hackyourfuture.backend.week6.postify.controllers;
+
+import net.hackyourfuture.backend.week6.postify.dto.response.lyric.TrackLyricResponse;
+import net.hackyourfuture.backend.week6.postify.services.TrackLyricsService;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/tracks")
+public class TrackLyricsController {
+    private final TrackLyricsService service;
+
+    public TrackLyricsController(TrackLyricsService service){
+        this.service = service;
+    }
+
+    @GetMapping("/{id}/lyrics")
+    public TrackLyricResponse getLyrics(@PathVariable("id") int trackId){
+        return service.getLyricsForTrack(trackId);
+    }
+}

postify/src/main/java/net/hackyourfuture/backend/week6/postify/controllers/UserStatisticsController.java

@@ -0,0 +1,24 @@
+package net.hackyourfuture.backend.week6.postify.controllers;
+
+import net.hackyourfuture.backend.week6.postify.dto.response.user.UserStatisticsResponse;
+import net.hackyourfuture.backend.week6.postify.services.UserStatisticsService;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/users")
+public class UserStatisticsController {
+
+    private final UserStatisticsService service;
+
+    public UserStatisticsController(UserStatisticsService service){
+        this.service = service;
+    }
+
+    @GetMapping("/{id}/stats")
+    public UserStatisticsResponse getUserStats(@PathVariable int id){
+        return service.getStatisticsForUser(id);
+    }
+}

postify/src/main/java/net/hackyourfuture/backend/week6/postify/dto/response/lyric/LyricApiResponse.java

@@ -0,0 +1,4 @@
+package net.hackyourfuture.backend.week6.postify.dto.response.lyric;
+
+public record LyricApiResponse(String lyrics) {
+}

postify/src/main/java/net/hackyourfuture/backend/week6/postify/dto/response/lyric/TrackBasicInfo.java

@@ -0,0 +1,4 @@
+package net.hackyourfuture.backend.week6.postify.dto.response.lyric;
+
+public record TrackBasicInfo  (int trackId, String trackTitle, String artistName){
+}

postify/src/main/java/net/hackyourfuture/backend/week6/postify/dto/response/lyric/TrackLyricResponse.java

@@ -0,0 +1,6 @@
+package net.hackyourfuture.backend.week6.postify.dto.response.lyric;
+
+import java.util.List;
+
+public record TrackLyricResponse (int trackId, String trackTitle, String artistName, List<String> lyrics){
+}

postify/src/main/java/net/hackyourfuture/backend/week6/postify/dto/response/user/UserBasicInfoResponse.java

@@ -0,0 +1,4 @@
+package net.hackyourfuture.backend.week6.postify.dto.response.user;
+
+public record UserBasicInfoResponse(int id, String name, String country) {
+}

postify/src/main/java/net/hackyourfuture/backend/week6/postify/dto/response/user/UserStatisticsResponse.java

@@ -0,0 +1,13 @@
+package net.hackyourfuture.backend.week6.postify.dto.response.user;
+
+public record UserStatisticsResponse(
+        int userId,
+        String userName,
+        String userCountry,
+        int totalStreams,
+        int uniqueTracksStreamed,
+        int uniqueArtistsStreamed,
+        String favoriteGenre,
+        int totalListeningTimeSeconds
+        ) {
+}

postify/src/main/java/net/hackyourfuture/backend/week6/postify/exceptions/GlobalExceptionHandler.java

@@ -0,0 +1,25 @@
+package net.hackyourfuture.backend.week6.postify.exceptions;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+@RestControllerAdvice
+public class GlobalExceptionHandler {
+
+    @ExceptionHandler(UserNotFoundException.class)
+    public ResponseEntity<String> handleUserNotFound(UserNotFoundException ex){
+        return ResponseEntity.status(HttpStatus.NOT_FOUND).body(ex.getMessage());
+    }
+
+    @ExceptionHandler(TrackNotFoundException.class)
+    public ResponseEntity<String> handleTrackNotFound(TrackNotFoundException ex){
+        return ResponseEntity.status(HttpStatus.NOT_FOUND).body(ex.getMessage());
+    }
+
+    @ExceptionHandler(LyricsNotFoundException.class)
+    public ResponseEntity<String> handleLyricsNotFound(LyricsNotFoundException ex){
+        return ResponseEntity.status(HttpStatus.NOT_FOUND).body(ex.getMessage());
+    }
+}

postify/src/main/java/net/hackyourfuture/backend/week6/postify/exceptions/LyricsNotFoundException.java

@@ -0,0 +1,7 @@
+package net.hackyourfuture.backend.week6.postify.exceptions;
+
+public class LyricsNotFoundException extends RuntimeException{
+    public LyricsNotFoundException(String trackTitle, String artistName){
+        super("Lyrics not found for track '" + trackTitle + "' by '" + artistName + "'");
+    }
+}

postify/src/main/java/net/hackyourfuture/backend/week6/postify/exceptions/TrackNotFoundException.java

@@ -0,0 +1,7 @@
+package net.hackyourfuture.backend.week6.postify.exceptions;
+
+public class TrackNotFoundException extends RuntimeException{
+    public TrackNotFoundException(int id){
+        super("Track with id " + id + " not found");
+    }
+}

postify/src/main/java/net/hackyourfuture/backend/week6/postify/exceptions/UserNotFoundException.java

@@ -0,0 +1,7 @@
+package net.hackyourfuture.backend.week6.postify.exceptions;
+
+public class UserNotFoundException extends RuntimeException{
+    public UserNotFoundException(int id){
+        super("User with id " + id + " not found");
+    }
+}

postify/src/main/java/net/hackyourfuture/backend/week6/postify/repository/TracksLyricsRepository.java

@@ -0,0 +1,36 @@
+package net.hackyourfuture.backend.week6.postify.repository;
+
+import net.hackyourfuture.backend.week6.postify.dto.response.lyric.TrackBasicInfo;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.stereotype.Repository;
+
+import java.util.Optional;
+
+@Repository
+public class TracksLyricsRepository {
+    private final JdbcTemplate jdbcTemplate;
+
+    public TracksLyricsRepository(JdbcTemplate jdbcTemplate){
+        this.jdbcTemplate = jdbcTemplate;
+    }
+
+    public Optional<TrackBasicInfo> findTrackWithArtist(int trackId){
+        String sql = """
+                SELECT t.track_id, t.track_title, a.artist_name
+                FROM tracks t
+                JOIN albums al ON t.album_id = al.album_id
+                JOIN artists a ON al.artist_id = a.artist_id
+                WHERE t.track_id = ?
+                """;
+
+        return jdbcTemplate.query(sql,rs -> {
+                if(rs.next()){
+                    return Optional.of(new TrackBasicInfo(
+                            rs.getInt("track_id"),
+                            rs.getString("track_title"),
+                            rs.getString("artist_name")
+                    ));
+                } return Optional.empty();
+                }, trackId);
+    }
+}