Generate thumbnails for Jellyfin shows

src/main/java/sh/rhiobet/lalafin/file/ThumbnailService.java

@@ -30,6 +30,8 @@ public class ThumbnailService {
             FileInfo fileInfo = (FileInfo) fileInfoBase;
             if (fileInfo.filename.endsWith(".zip")) {
                 return this.generateThumbnailFromZip(fileInfo, thumbPath);
+            } else {
+                return this.generateThumbnailForFile(fileInfo, thumbPath);
             }
         } else if (fileInfoBase instanceof FolderInfo) {
             return this.generateThumbnailForFolder((FolderInfo) fileInfoBase, thumbPath);
@@ -37,6 +39,32 @@ public class ThumbnailService {
         return false;
     }
 
+    public boolean generateThumbnailForFile(FileInfo fileInfo, Path thumbPath) {
+        Path filePath = Paths.get(fileApiConfiguration.directory()
+                + URLDecoder.decode(fileInfo.directUrl, StandardCharsets.UTF_8));
+
+        Path imgPath = filePath.resolveSibling(
+                filePath.getFileName().toString().replaceAll("\\.[^.]*$", "-thumb.jpg"));
+        if (Files.exists(imgPath)) {
+            try {
+                thumbPath.getParent().toFile().mkdirs();
+
+                ConvertCmd convert = new ConvertCmd();
+                IMOperation op = new IMOperation();
+                op.addImage(imgPath.toString());
+                op.resize(200, null);
+                op.addImage(thumbPath.toString());
+                convert.run(op);
+
+                return true;
+            } catch (IOException | InterruptedException | IM4JavaException e) {
+                e.printStackTrace();
+            }
+        }
+
+        return false;
+    }
+
     public boolean generateThumbnailFromZip(FileInfo fileInfo, Path thumbPath) {
         Path zipPath = Paths.get(fileApiConfiguration.directory()
                 + URLDecoder.decode(fileInfo.directUrl, StandardCharsets.UTF_8));
@@ -77,10 +105,30 @@ public class ThumbnailService {
                 + URLDecoder.decode(folderInfo.directUrl, StandardCharsets.UTF_8));
 
         try {
-            Optional<Path> imgPath = Files.list(folderPath).sorted()
+            Optional<Path> imgPath;
+
+            Path posterPath = folderPath.resolve("poster.jpg");
+            if (Files.exists(posterPath)) {
+                // Check for series poster
+                imgPath = Optional.of(posterPath);
+            } else if (folderPath.getFileName().toString().startsWith("Season ")
+                    || (folderPath.getFileName().toString().equals("Specials"))) {
+                // Season folder
+                String folderName = folderPath.getFileName().toString();
+                if (folderName.startsWith("Season ")) {
+                    String seasonNumber =
+                            String.format("%02d", Integer.parseInt(folderName.substring(7)));
+                    imgPath = Optional
+                            .of(folderPath.resolveSibling("season" + seasonNumber + "-poster.jpg"));
+                } else {
+                    imgPath = Optional.of(folderPath.resolveSibling("season-specials-poster.jpg"));
+                }
+            } else {
+                imgPath = Files.list(folderPath).sorted()
                         .filter(p -> !Files.isDirectory(p)
                                 && (p.toString().endsWith(".png") || p.toString().endsWith(".jpg")))
                         .findFirst();
+            }
             if (imgPath.isPresent()) {
                 thumbPath.getParent().toFile().mkdirs();
 
@@ -93,8 +141,8 @@ public class ThumbnailService {
 
                 return true;
             }
-        } catch (IOException | InterruptedException | IM4JavaException ignored) {
-            ignored.printStackTrace();
+        } catch (IOException | InterruptedException | IM4JavaException e) {
+            e.printStackTrace();
         }
 
         return false;