From d99f68a8994a52a173faa37ede6442af9111cd0a Mon Sep 17 00:00:00 2001
From: chinlinlee <a5566qq2581@gmail.com>
Date: Mon, 1 Jan 2024 20:44:03 +0800
Subject: [PATCH] refactor: split `getThumbnailAndResponse` into two
 responsibility things

- remove `getThumbnailAndResponse` method in wado uri service
- for right responsibility:
  - response should in controller, not in service
  - so, move `response.end` into controller
  - in service, throw error instead of response
---
 .../WADO-RS/service/thumbnail.service.js      | 25 ++++++-------------
 .../WADO-RS/thumbnail/base.controller.js      | 16 ++++--------
 2 files changed, 12 insertions(+), 29 deletions(-)

diff --git a/api/dicom-web/controller/WADO-RS/service/thumbnail.service.js b/api/dicom-web/controller/WADO-RS/service/thumbnail.service.js
index 539f877a..d18ec8a1 100644
--- a/api/dicom-web/controller/WADO-RS/service/thumbnail.service.js
+++ b/api/dicom-web/controller/WADO-RS/service/thumbnail.service.js
@@ -3,6 +3,7 @@ const errorResponse = require("../../../../../utils/errorResponse/errorResponseM
 const renderedService = require("@api/dicom-web/controller/WADO-RS/service/rendered.service");
 const _ = require("lodash");
 const { getUidsString } = require("./WADO-RS.service");
+const { NotFoundInstanceError } = require("@error/dicom-instance");
 class ThumbnailService {
 
     /**
@@ -18,21 +19,19 @@ class ThumbnailService {
         this.apiLogger = apiLogger;
     }
 
-    async getThumbnailAndResponse() {
+    async getThumbnail() {
         if (!_.get(this.request, "query.viewport")) {
             _.set(this.request, "query.viewport", "100,100");
         }
 
         let instanceFramesObj = await this.thumbnailFactory.getThumbnailInstance();
-        if (this.checkInstanceExists(instanceFramesObj)) {
-            return;
-        }
+        this.checkInstanceExists(instanceFramesObj);
 
         let thumbnail = await this.getThumbnailByInstance(instanceFramesObj);
-        if (thumbnail) {
-            return this.response.end(thumbnail, "binary");
+        if (!thumbnail) {
+            throw new Error(`Can not process this image, instanceUID: ${instanceFramesObj.instanceUID}`);
         }
-        throw new Error(`Can not process this image, instanceUID: ${instanceFramesObj.instanceUID}`);
+        return thumbnail;
     }
 
     async getThumbnailByInstance(instanceFramesObj) {
@@ -57,18 +56,8 @@ class ThumbnailService {
 
     checkInstanceExists(instanceFramesObj) {
         if (!instanceFramesObj) {
-            this.response.writeHead(404, {
-                "Content-Type": "application/dicom+json"
-            });
-            let notFoundMessage = errorResponse.getNotFoundErrorMessage(`Not Found, ${getUidsString(this.thumbnailFactory.uids)}`);
-
-            let notFoundMessageStr = JSON.stringify(notFoundMessage);
-
-            this.apiLogger.logger.warn(`[${notFoundMessageStr}]`);
-
-            return this.response.end(notFoundMessageStr);
+            throw new NotFoundInstanceError(`Not Found, ${getUidsString(this.thumbnailFactory.uids)}`);
         }
-        return undefined;
     }
 }
 
diff --git a/api/dicom-web/controller/WADO-RS/thumbnail/base.controller.js b/api/dicom-web/controller/WADO-RS/thumbnail/base.controller.js
index c657a3ba..c96cb0df 100644
--- a/api/dicom-web/controller/WADO-RS/thumbnail/base.controller.js
+++ b/api/dicom-web/controller/WADO-RS/thumbnail/base.controller.js
@@ -2,6 +2,7 @@ const { Controller } = require("@root/api/controller.class");
 const { StudyImagePathFactory } = require("@api/dicom-web/controller/WADO-RS/service/WADO-RS.service");
 const { ThumbnailService } = require("../service/thumbnail.service");
 const { ApiLogger } = require("@root/utils/logs/api-logger");
+const { ApiErrorArrayHandler } = require("@error/api-errors.handler");
 
 class BaseThumbnailController extends Controller {
     constructor(req, res) {
@@ -19,18 +20,11 @@ class BaseThumbnailController extends Controller {
         try {
             this.logAction();
             let thumbnailService = new ThumbnailService(this.request, this.response, this.apiLogger, this.factory);
-            return thumbnailService.getThumbnailAndResponse();
+            let thumbnail = await thumbnailService.getThumbnail();
+            return this.response.end(thumbnail, "binary");
         } catch (e) {
-            let errorStr = JSON.stringify(e, Object.getOwnPropertyNames(e));
-            this.apiLogger.logger.error(errorStr);
-
-            this.response.writeHead(500, {
-                "Content-Type": "application/dicom+json"
-            });
-            return this.response.end({
-                code: 500,
-                message: "An exception occurred"
-            });
+            let apiErrorArrayHandler = new ApiErrorArrayHandler(this.response, this.apiLogger, e);
+            return apiErrorArrayHandler.doErrorResponse();
         }
     }
 }