Feat/#127 ManiaDB API 를 사용하여 등록되지 않은 노래 검색 기능 구현

backend/build.gradle

@@ -27,6 +27,12 @@ dependencies {
     implementation 'org.springframework.boot:spring-boot-starter-web'
     implementation 'org.springframework.boot:spring-boot-starter-validation'
 
+    // WebClient Dependency
+    implementation 'org.springframework.boot:spring-boot-starter-webflux'
+
+    // XML parsing Dependency
+    implementation 'org.glassfish.jaxb:jaxb-runtime'
+
     compileOnly 'org.projectlombok:lombok'
 
     runtimeOnly 'com.h2database:h2'
@@ -36,6 +42,9 @@ dependencies {
 
     testImplementation 'org.springframework.boot:spring-boot-starter-test'
     testImplementation 'io.rest-assured:rest-assured:5.3.1'
+
+    // WebClient Test Dependencies
+    testImplementation 'com.squareup.okhttp3:mockwebserver'
 }
 
 tasks.named('test') {

backend/src/main/java/shook/shook/song/application/ManiaDBSearchService.java

@@ -0,0 +1,70 @@
+package shook.shook.song.application;
+
+import java.nio.charset.StandardCharsets;
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.HttpStatusCode;
+import org.springframework.http.MediaType;
+import org.springframework.stereotype.Service;
+import org.springframework.web.reactive.function.client.WebClient;
+import shook.shook.song.application.dto.UnregisteredSongSearchResponse;
+import shook.shook.song.application.dto.maniadb.ManiaDBAPISearchResponse;
+import shook.shook.song.application.dto.maniadb.UnregisteredSongResponses;
+import shook.shook.song.exception.UnregisteredSongException;
+import shook.shook.song.exception.UnregisteredSongException.EmptyResultException;
+
+@RequiredArgsConstructor
+@Service
+public class ManiaDBSearchService {
+
+    private static final String MANIA_DB_API_URI = "/%s/?sr=song&display=%d&key=example&v=0.5";
+    private static final int SEARCH_SIZE = 100;
+    private static final String SPECIAL_MARK_REGEX = "[^ㄱ-ㅎㅏ-ㅣ가-힣a-zA-Z0-9,. ]";
+    private final WebClient webClient;
+
+    public List<UnregisteredSongSearchResponse> searchSongs(final String searchWord) {
+        final String parsedSearchWord = replaceSpecialMark(searchWord);
+        final UnregisteredSongResponses searchResult = getSearchResult(parsedSearchWord);
+
+        if (Objects.isNull(searchResult.getSongs())) {
+            return Collections.emptyList();
+        }
+
+        return searchResult.getSongs().stream()
+            .map(UnregisteredSongSearchResponse::from)
+            .toList();
+    }
+
+    private String replaceSpecialMark(final String rawSearchWord) {
+        return rawSearchWord.replaceAll(SPECIAL_MARK_REGEX, "");
+    }
+
+    private UnregisteredSongResponses getSearchResult(final String searchWord) {
+        final String searchUrl = String.format(MANIA_DB_API_URI, searchWord, SEARCH_SIZE);
+        final ManiaDBAPISearchResponse result = getResultFromManiaDB(searchUrl);
+
+        if (Objects.isNull(result)) {
+            throw new EmptyResultException();
+        }
+
+        return result.getSongs();
+    }
+
+    private ManiaDBAPISearchResponse getResultFromManiaDB(final String searchUrl) {
+        return webClient.get()
+            .uri(searchUrl)
+            .accept(MediaType.TEXT_XML)
+            .acceptCharset(StandardCharsets.UTF_8)
+            .retrieve()
+            .onStatus(HttpStatusCode::is4xxClientError, (clientResponse) -> {
+                throw new UnregisteredSongException.ManiaDBClientException();
+            })
+            .onStatus(HttpStatusCode::is5xxServerError, (clientResponse) -> {
+                throw new UnregisteredSongException.ManiaDBServerException();
+            })
+            .bodyToMono(ManiaDBAPISearchResponse.class)
+            .block();
+    }
+}

backend/src/main/java/shook/shook/song/application/dto/UnregisteredSongSearchResponse.java

@@ -0,0 +1,45 @@
+package shook.shook.song.application.dto;
+
+import java.util.stream.Collectors;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import shook.shook.song.application.dto.maniadb.SongArtistResponse;
+
+@AllArgsConstructor
+@Getter
+public class UnregisteredSongSearchResponse {
+
+    private static final String EMPTY_SINGER = "";
+    private static final String SINGER_DELIMITER = ", ";
+    private String title;
+    private String singer;
+    private String albumImageUrl;
+
+    public static UnregisteredSongSearchResponse from(
+        final shook.shook.song.application.dto.maniadb.UnregisteredSongResponse unregisteredSongResponse) {
+        if (unregisteredSongResponse.getTrackArtists() == null
+            || unregisteredSongResponse.getTrackArtists().getArtists() == null) {
+            return new UnregisteredSongSearchResponse(
+                unregisteredSongResponse.getTitle().trim(),
+                EMPTY_SINGER,
+                unregisteredSongResponse.getAlbum().getImage().trim()
+            );
+        }
+
+        final String singers = collectToString(unregisteredSongResponse);
+
+        return new UnregisteredSongSearchResponse(
+            unregisteredSongResponse.getTitle().trim(),
+            singers,
+            unregisteredSongResponse.getAlbum().getImage().trim()
+        );
+    }
+
+    private static String collectToString(
+        final shook.shook.song.application.dto.maniadb.UnregisteredSongResponse unregisteredSongResponse) {
+        return unregisteredSongResponse.getTrackArtists().getArtists().stream()
+            .map(SongArtistResponse::getName)
+            .map(String::trim)
+            .collect(Collectors.joining(SINGER_DELIMITER));
+    }
+}

backend/src/main/java/shook/shook/song/application/dto/maniadb/ManiaDBAPISearchResponse.java

@@ -0,0 +1,13 @@
+package shook.shook.song.application.dto.maniadb;
+
+import jakarta.xml.bind.annotation.XmlElement;
+import jakarta.xml.bind.annotation.XmlRootElement;
+import lombok.Getter;
+
+@Getter
+@XmlRootElement(name = "rss")
+public class ManiaDBAPISearchResponse {
+
+    @XmlElement(name = "channel")
+    private UnregisteredSongResponses songs;
+}

backend/src/main/java/shook/shook/song/application/dto/maniadb/SongAlbumResponse.java

@@ -0,0 +1,13 @@
+package shook.shook.song.application.dto.maniadb;
+
+import jakarta.xml.bind.annotation.XmlElement;
+import jakarta.xml.bind.annotation.XmlRootElement;
+import lombok.Getter;
+
+@Getter
+@XmlRootElement(name = "album", namespace = "http://www.maniadb.com/api")
+public class SongAlbumResponse {
+
+    @XmlElement(name = "image")
+    private String image;
+}

backend/src/main/java/shook/shook/song/application/dto/maniadb/SongArtistResponse.java

@@ -0,0 +1,13 @@
+package shook.shook.song.application.dto.maniadb;
+
+import jakarta.xml.bind.annotation.XmlElement;
+import jakarta.xml.bind.annotation.XmlRootElement;
+import lombok.Getter;
+
+@Getter
+@XmlRootElement(name = "artist", namespace = "http://www.maniadb.com/api")
+public class SongArtistResponse {
+
+    @XmlElement(name = "name")
+    private String name;
+}

backend/src/main/java/shook/shook/song/application/dto/maniadb/SongTrackArtistsResponse.java

@@ -0,0 +1,14 @@
+package shook.shook.song.application.dto.maniadb;
+
+import jakarta.xml.bind.annotation.XmlElement;
+import jakarta.xml.bind.annotation.XmlRootElement;
+import java.util.List;
+import lombok.Getter;
+
+@Getter
+@XmlRootElement(name = "trackartists", namespace = "http://www.maniadb.com/api")
+public class SongTrackArtistsResponse {
+
+    @XmlElement(name = "artist", namespace = "http://www.maniadb.com/api")
+    private List<SongArtistResponse> artists;
+}

backend/src/main/java/shook/shook/song/application/dto/maniadb/UnregisteredSongResponse.java

@@ -0,0 +1,19 @@
+package shook.shook.song.application.dto.maniadb;
+
+import jakarta.xml.bind.annotation.XmlElement;
+import jakarta.xml.bind.annotation.XmlRootElement;
+import lombok.Getter;
+
+@Getter
+@XmlRootElement(name = "item")
+public class UnregisteredSongResponse {
+
+    @XmlElement(name = "title")
+    private String title;
+
+    @XmlElement(name = "trackartists", namespace = "http://www.maniadb.com/api")
+    private SongTrackArtistsResponse trackArtists;
+
+    @XmlElement(name = "album", namespace = "http://www.maniadb.com/api")
+    private SongAlbumResponse album;
+}

backend/src/main/java/shook/shook/song/application/dto/maniadb/UnregisteredSongResponses.java

@@ -0,0 +1,14 @@
+package shook.shook.song.application.dto.maniadb;
+
+import jakarta.xml.bind.annotation.XmlElement;
+import jakarta.xml.bind.annotation.XmlRootElement;
+import java.util.List;
+import lombok.Getter;
+
+@Getter
+@XmlRootElement(name = "channel")
+public class UnregisteredSongResponses {
+
+    @XmlElement(name = "item")
+    private List<UnregisteredSongResponse> songs;
+}

backend/src/main/java/shook/shook/song/config/ManiaDBConfiguration.java

@@ -0,0 +1,30 @@
+package shook.shook.song.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.codec.xml.Jaxb2XmlDecoder;
+import org.springframework.web.reactive.function.client.ExchangeStrategies;
+import org.springframework.web.reactive.function.client.WebClient;
+
+@Configuration
+public class ManiaDBConfiguration {
+
+    private static final String MANIA_DB_BASE_URL = "http://www.maniadb.com/api/search";
+
+    @Bean
+    public WebClient getWebClient() {
+        return WebClient.builder()
+            .baseUrl(MANIA_DB_BASE_URL)
+            .exchangeStrategies(
+                ExchangeStrategies.builder()
+                    .codecs(configurer ->
+                        configurer.defaultCodecs().jaxb2Decoder(new Jaxb2XmlDecoder())
+                    )
+                    .codecs(configurer ->
+                        configurer.defaultCodecs().maxInMemorySize(4 * 1024 * 1024)
+                    )
+                    .build()
+            )
+            .build();
+    }
+}

backend/src/main/java/shook/shook/song/exception/UnregisteredSongException.java

@@ -0,0 +1,25 @@
+package shook.shook.song.exception;
+
+public class UnregisteredSongException extends RuntimeException {
+
+    public static class EmptyResultException extends UnregisteredSongException {
+
+        public EmptyResultException() {
+            super();
+        }
+    }
+
+    public static class ManiaDBServerException extends UnregisteredSongException {
+
+        public ManiaDBServerException() {
+            super();
+        }
+    }
+
+    public static class ManiaDBClientException extends UnregisteredSongException {
+
+        public ManiaDBClientException() {
+            super();
+        }
+    }
+}

backend/src/main/java/shook/shook/song/ui/ManiaDBApiController.java

@@ -0,0 +1,29 @@
+package shook.shook.song.ui;
+
+import java.util.List;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+import shook.shook.song.application.ManiaDBSearchService;
+import shook.shook.song.application.dto.UnregisteredSongSearchResponse;
+
+@RequiredArgsConstructor
+@RequestMapping("/songs/unregistered/search")
+@RestController
+public class ManiaDBApiController {
+
+    private final ManiaDBSearchService maniaDBSearchService;
+
+    @GetMapping
+    public ResponseEntity<List<UnregisteredSongSearchResponse>> searchUnregisteredSong(
+        final @RequestParam("keyword") String searchWord
+    ) {
+        final List<UnregisteredSongSearchResponse> songs = maniaDBSearchService.searchSongs(
+            searchWord);
+
+        return ResponseEntity.ok(songs);
+    }
+}