feat(media): 支持后台转码配置与缩略图轴

fruitshorts-app-api/src/main/java/com/fruitshorts/app/service/AppCatalogService.java

@@ -20,6 +20,7 @@ import com.fruitshorts.content.service.DramaService;
 import com.fruitshorts.content.service.EpisodeService;
 import com.fruitshorts.interaction.service.CommentService;
 import com.fruitshorts.media.service.PlaybackSigner;
+import com.fruitshorts.media.service.ThumbnailUrlResolver;
 import com.fruitshorts.content.vo.DramaCategoryRespVO;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
@@ -50,6 +51,7 @@ public class AppCatalogService {
     private final DramaCategoryService dramaCategoryService;
     private final PlaybackSigner playbackSigner;
     private final CommentService commentService;
+    private final ThumbnailUrlResolver thumbnailUrlResolver;
 
     public AppFeedVO homeFeed() {
         Map<Long, String> categoryNames = categoryNameMap();
@@ -110,6 +112,8 @@ public class AppCatalogService {
         List<DramaEpisode> episodes = episodeService.listPublishedByDrama(dramaId);
         Map<Long, Long> episodeCommentCounts = commentService.countByEpisodes(
                 episodes.stream().map(DramaEpisode::getId).sorted().toList());
+        Map<Long, String> thumbnailUrls = thumbnailUrlResolver.resolveAll(
+                episodes.stream().map(DramaEpisode::getId).sorted().toList());
         String categoryName = categoryNameMap().getOrDefault(drama.getCategoryId(), "");
 
         AppDramaDetailVO detail = new AppDramaDetailVO();
@@ -128,7 +132,7 @@ public class AppCatalogService {
         detail.setFavoriteCount(drama.getFavoriteCount());
         detail.setCommentCount(commentService.countByDrama(dramaId));
         detail.setEpisodes(episodes.stream()
-                .map(episode -> toEpisode(episode, episodeCommentCounts))
+                .map(episode -> toEpisode(episode, episodeCommentCounts, thumbnailUrls))
                 .toList());
         return detail;
     }
@@ -176,14 +180,18 @@ public class AppCatalogService {
         Map<Long, DramaEpisode> previews = episodeService.firstPlayableByDramas(ids);
         Map<Long, Long> commentCounts = commentService.countByEpisodes(
                 previews.values().stream().map(DramaEpisode::getId).sorted().toList());
+        Map<Long, String> thumbnailUrls = thumbnailUrlResolver.resolveAll(
+                previews.values().stream().map(DramaEpisode::getId).sorted().toList());
         return dramas.stream()
                 .map(drama -> toCard(
-                        drama, categoryNames, previews.get(drama.getId()), commentCounts))
+                        drama, categoryNames, previews.get(drama.getId()), commentCounts,
+                        thumbnailUrls))
                 .toList();
     }
 
     private AppDramaCardVO toCard(Drama drama, Map<Long, String> categoryNames,
-                                  DramaEpisode preview, Map<Long, Long> commentCounts) {
+                                  DramaEpisode preview, Map<Long, Long> commentCounts,
+                                  Map<Long, String> thumbnailUrls) {
         AppDramaCardVO card = new AppDramaCardVO();
         card.setId(drama.getId());
         card.setTitle(drama.getTitle());
@@ -201,11 +209,13 @@ public class AppCatalogService {
                 ? 0L : commentCounts.getOrDefault(preview.getId(), 0L));
         card.setLanguage(drama.getLanguage());
         card.setDramaType(drama.getDramaType());
-        card.setPreview(preview == null ? null : toEpisode(preview, commentCounts));
+        card.setPreview(preview == null
+                ? null : toEpisode(preview, commentCounts, thumbnailUrls));
         return card;
     }
 
-    private AppEpisodeVO toEpisode(DramaEpisode episode, Map<Long, Long> commentCounts) {
+    private AppEpisodeVO toEpisode(DramaEpisode episode, Map<Long, Long> commentCounts,
+                                   Map<Long, String> thumbnailUrls) {
         AppEpisodeVO vo = new AppEpisodeVO();
         vo.setId(episode.getId());
         vo.setNumber(episode.getEpNo());
@@ -219,6 +229,7 @@ public class AppCatalogService {
         vo.setUnlockCoin(episode.getUnlockCoin());
         vo.setLikeCount(episode.getLikeCount() == null ? 0L : episode.getLikeCount());
         vo.setCommentCount(commentCounts.getOrDefault(episode.getId(), 0L));
+        vo.setThumbnailsUrl(thumbnailUrls.get(episode.getId()));
         if (free) {
             // 播放地址统一在这里签名：客户端拿不到可长期复用的裸地址
             vo.setPlayUrl(playbackSigner.sign(playableSource(episode)));

fruitshorts-app-api/src/main/java/com/fruitshorts/app/vo/AppEpisodeVO.java

@@ -24,4 +24,6 @@ public class AppEpisodeVO {
      * 详情页拿到就能直接播，不必按集再请求一次播放票据。
      */
     private String playUrl;
+    /** 雪碧图 WebVTT 时间轴地址；没有产物时为 null */
+    private String thumbnailsUrl;
 }