feat: implement search by manga's alternative titles

src/main/java/com/magamochi/mangamochi/model/dto/MangaDTO.java

@@ -3,6 +3,7 @@ package com.magamochi.mangamochi.model.dto;
 import static java.util.Objects.isNull;
 
 import com.magamochi.mangamochi.model.entity.Manga;
+import com.magamochi.mangamochi.model.entity.MangaAlternativeTitle;
 import com.magamochi.mangamochi.model.entity.MangaChapter;
 import com.magamochi.mangamochi.model.entity.MangaProvider;
 import jakarta.validation.constraints.NotBlank;
@@ -35,7 +36,7 @@ public record MangaDTO(
         manga.getPublishedTo(),
         manga.getSynopsis(),
         manga.getMangaProviders().size(),
-        manga.getAlternativeTitles(),
+        manga.getAlternativeTitles().stream().map(MangaAlternativeTitle::getTitle).toList(),
         manga.getMangaGenres().stream().map(mangaGenre -> mangaGenre.getGenre().getName()).toList(),
         manga.getMangaAuthors().stream()
             .map(mangaAuthor -> mangaAuthor.getAuthor().getName())

src/main/java/com/magamochi/mangamochi/model/entity/Manga.java

@@ -1,13 +1,11 @@
 package com.magamochi.mangamochi.model.entity;
 
-import io.hypersistence.utils.hibernate.type.array.ListArrayType;
 import jakarta.persistence.*;
 import java.time.Instant;
 import java.time.OffsetDateTime;
 import java.util.List;
 import lombok.*;
 import org.hibernate.annotations.CreationTimestamp;
-import org.hibernate.annotations.Type;
 import org.hibernate.annotations.UpdateTimestamp;
 
 @Entity
@@ -26,10 +24,6 @@ public class Manga {
 
   private String title;
 
-  @Type(ListArrayType.class)
-  @Column(name = "alternative_titles", columnDefinition = "text[]")
-  private List<String> alternativeTitles;
-
   //  @Enumerated(EnumType.STRING)
   private String status;
 
@@ -61,5 +55,8 @@ public class Manga {
   @OneToMany(mappedBy = "manga")
   private List<UserFavoriteManga> userFavoriteMangas;
 
+  @OneToMany(mappedBy = "manga")
+  private List<MangaAlternativeTitle> alternativeTitles;
+
   private Integer chapterCount;
 }

src/main/java/com/magamochi/mangamochi/model/entity/MangaAlternativeTitle.java

@@ -0,0 +1,23 @@
+package com.magamochi.mangamochi.model.entity;
+
+import jakarta.persistence.*;
+import lombok.*;
+
+@Entity
+@Table(name = "manga_alternative_titles")
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+@Getter
+@Setter
+public class MangaAlternativeTitle {
+  @Id
+  @GeneratedValue(strategy = GenerationType.IDENTITY)
+  private Long id;
+
+  @ManyToOne
+  @JoinColumn(name = "manga_id")
+  private Manga manga;
+
+  private String title;
+}

src/main/java/com/magamochi/mangamochi/model/repository/MangaAlternativeTitlesRepository.java

@@ -0,0 +1,7 @@
+package com.magamochi.mangamochi.model.repository;
+
+import com.magamochi.mangamochi.model.entity.MangaAlternativeTitle;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface MangaAlternativeTitlesRepository
+    extends JpaRepository<MangaAlternativeTitle, Long> {}

src/main/java/com/magamochi/mangamochi/model/specification/MangaSpecification.java

@@ -27,9 +27,14 @@ public class MangaSpecification {
         var titlePredicate =
             criteriaBuilder.like(criteriaBuilder.lower(root.get("title")), searchPattern);
 
-        var authorsPredicate = searchInAuthors(root, query, criteriaBuilder, searchPattern);
+        var alternativeTitlesPredicate =
+            searchInAlternativeTitles(root, criteriaBuilder, searchPattern);
 
-        var searchPredicate = criteriaBuilder.or(titlePredicate, authorsPredicate);
+        var authorsPredicate = searchInAuthors(root, criteriaBuilder, searchPattern);
+
+        var searchPredicate =
+            criteriaBuilder.or(
+                criteriaBuilder.or(titlePredicate, alternativeTitlesPredicate), authorsPredicate);
 
         predicates.add(searchPredicate);
       }
@@ -64,11 +69,16 @@ public class MangaSpecification {
     };
   }
 
+  private static Predicate searchInAlternativeTitles(
+      Root<Manga> root, CriteriaBuilder criteriaBuilder, String searchPattern) {
+    Join<Manga, ?> alternativeTitlesJoin = root.join("alternativeTitles", JoinType.LEFT);
+
+    return criteriaBuilder.like(
+        criteriaBuilder.lower(alternativeTitlesJoin.get("title")), searchPattern);
+  }
+
   private static Predicate searchInAuthors(
-      Root<Manga> root,
+      Root<Manga> root, CriteriaBuilder criteriaBuilder, String searchPattern) {
-      CriteriaQuery<?> query,
-      CriteriaBuilder criteriaBuilder,
-      String searchPattern) {
     Join<Manga, ?> mangaAuthorsJoin = root.join("mangaAuthors", JoinType.LEFT);
     Join<Object, Author> authorJoin = mangaAuthorsJoin.join("author", JoinType.LEFT);
 

src/main/java/com/magamochi/mangamochi/service/MangaImportService.java

@@ -42,6 +42,7 @@ public class MangaImportService {
 
   private final JikanClient jikanClient;
   private final MangaChapterImageRepository mangaChapterImageRepository;
+  private final MangaAlternativeTitlesRepository mangaAlternativeTitlesRepository;
 
   RateLimiter rateLimiter = RateLimiter.create(1);
 
@@ -125,7 +126,6 @@ public class MangaImportService {
       rateLimiter.acquire();
       var mangaData = jikanClient.getMangaById(manga.getMalId());
 
-      manga.setAlternativeTitles(mangaData.data().title_synonyms());
       manga.setSynopsis(mangaData.data().synopsis());
       manga.setStatus(mangaData.data().status());
       manga.setScore(DoubleUtil.round((double) mangaData.data().score(), 2));
@@ -205,7 +205,12 @@ public class MangaImportService {
         manga.setCoverImage(image);
       }
 
-      mangaRepository.save(manga);
+      var mangaEntity = mangaRepository.save(manga);
+      var alternativeTitles =
+          mangaData.data().title_synonyms().stream()
+              .map(at -> MangaAlternativeTitle.builder().manga(mangaEntity).title(at).build())
+              .toList();
+      mangaAlternativeTitlesRepository.saveAll(alternativeTitles);
 
     } catch (Exception e) {
       log.warn("Error updating manga data for manga {}. {}", manga.getTitle(), e);

src/main/resources/db/migration/V0014__MANGA_ALTERNATIVE_TITLES_TABLE.sql

@@ -0,0 +1,18 @@
+CREATE TABLE manga_alternative_titles
+(
+    id       BIGSERIAL PRIMARY KEY,
+    manga_id BIGINT REFERENCES mangas (id),
+    title    VARCHAR NOT NULL
+);
+
+INSERT INTO manga_alternative_titles (manga_id, title)
+SELECT id                         as manga_id,
+       unnest(alternative_titles) as title
+FROM mangas
+WHERE alternative_titles IS NOT NULL;
+
+CREATE INDEX idx_manga_alternative_titles_manga_id ON manga_alternative_titles (manga_id);
+
+CREATE INDEX idx_manga_alternative_titles_title ON manga_alternative_titles (title);
+
+ALTER TABLE mangas DROP COLUMN alternative_titles;