feat: create get attahcment types api.

src/main/java/run/halo/app/controller/admin/api/AttachmentController.java

@@ -9,6 +9,7 @@ import org.springframework.web.bind.annotation.*;
 import org.springframework.web.multipart.MultipartFile;
 import run.halo.app.model.dto.AttachmentDTO;
 import run.halo.app.model.entity.Attachment;
+import run.halo.app.model.enums.AttachmentType;
 import run.halo.app.model.params.AttachmentParam;
 import run.halo.app.model.params.AttachmentQuery;
 import run.halo.app.service.AttachmentService;
@@ -112,4 +113,10 @@ public class AttachmentController {
     public List<String> listMediaTypes() {
         return attachmentService.listAllMediaType();
     }
+
+    @GetMapping("types")
+    @ApiOperation("Lists all of types.")
+    public List<AttachmentType> listTypes() {
+        return attachmentService.listAllType();
+    }
 }

src/main/java/run/halo/app/repository/AttachmentRepository.java

@@ -4,6 +4,7 @@ import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
 import org.springframework.data.jpa.repository.Query;
 import org.springframework.lang.NonNull;
 import run.halo.app.model.entity.Attachment;
+import run.halo.app.model.enums.AttachmentType;
 import run.halo.app.repository.base.BaseRepository;
 
 import java.util.List;
@@ -12,6 +13,7 @@ import java.util.List;
  * Attachment repository
  *
  * @author johnniang
+ * @author ryanwang
  * @date 2019-04-03
  */
 public interface AttachmentRepository extends BaseRepository<Attachment, Integer>, JpaSpecificationExecutor<Attachment> {
@@ -24,6 +26,14 @@ public interface AttachmentRepository extends BaseRepository<Attachment, Integer
     @Query(value = "select distinct a.mediaType from Attachment a")
     List<String> findAllMediaType();
 
+    /**
+     * Find all attachment type.
+     *
+     * @return list of type.
+     */
+    @Query(value = "select distinct a.type from Attachment a")
+    List<AttachmentType> findAllType();
+
     /**
      * Counts by attachment path.
      *

src/main/java/run/halo/app/service/AttachmentService.java

@@ -7,6 +7,7 @@ import org.springframework.web.multipart.MultipartFile;
 import run.halo.app.exception.FileOperationException;
 import run.halo.app.model.dto.AttachmentDTO;
 import run.halo.app.model.entity.Attachment;
+import run.halo.app.model.enums.AttachmentType;
 import run.halo.app.model.params.AttachmentQuery;
 import run.halo.app.service.base.CrudService;
 
@@ -74,4 +75,11 @@ public interface AttachmentService extends CrudService<Attachment, Integer> {
      * @return list of media type
      */
     List<String> listAllMediaType();
+
+    /**
+     * List all type.
+     *
+     * @return list of type.
+     */
+    List<AttachmentType> listAllType();
 }

src/main/java/run/halo/app/service/impl/AttachmentServiceImpl.java

@@ -178,6 +178,11 @@ public class AttachmentServiceImpl extends AbstractCrudService<Attachment, Integ
         return attachmentRepository.findAllMediaType();
     }
 
+    @Override
+    public List<AttachmentType> listAllType() {
+        return attachmentRepository.findAllType();
+    }
+
     @Override
     public Attachment create(Attachment attachment) {
         Assert.notNull(attachment, "Attachment must not be null");