Generate thumbnails for folders

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

@@ -7,6 +7,7 @@ import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.NoSuchElementException;
+import java.util.Optional;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipFile;
 import javax.enterprise.context.ApplicationScoped;
@@ -17,6 +18,7 @@ import org.im4java.core.IMOperation;
 import sh.rhiobet.lalafin.api.configuration.FileApiConfiguration;
 import sh.rhiobet.lalafin.api.model.FileInfo;
 import sh.rhiobet.lalafin.api.model.FileInfoBase;
+import sh.rhiobet.lalafin.api.model.FolderInfo;
 
 @ApplicationScoped
 public class ThumbnailService {
@@ -29,6 +31,8 @@ public class ThumbnailService {
             if (fileInfo.filename.endsWith(".zip")) {
                 return this.generateThumbnailFromZip(fileInfo, thumbPath);
             }
+        } else if (fileInfoBase instanceof FolderInfo) {
+            return this.generateThumbnailForFolder((FolderInfo) fileInfoBase, thumbPath);
         }
         return false;
     }
@@ -68,4 +72,32 @@ public class ThumbnailService {
         return false;
     }
 
+    public boolean generateThumbnailForFolder(FolderInfo folderInfo, Path thumbPath) {
+        Path folderPath = Paths.get(fileApiConfiguration.directory()
+                + URLDecoder.decode(folderInfo.directUrl, StandardCharsets.UTF_8));
+
+        try {
+            Optional<Path> 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();
+
+                ConvertCmd convert = new ConvertCmd();
+                IMOperation op = new IMOperation();
+                op.addImage(imgPath.get().toString());
+                op.resize(200, null);
+                op.addImage(thumbPath.toString());
+                convert.run(op);
+
+                return true;
+            }
+        } catch (IOException | InterruptedException | IM4JavaException ignored) {
+            ignored.printStackTrace();
+        }
+
+        return false;
+    }
+
 }