code refactor

src/models/transaction_picture_info.ts

@@ -1,3 +1,27 @@
+export class TransactionPicture implements TransactionPictureInfoBasicResponse {
+    public pictureId: string;
+    public originalUrl: string;
+
+    private constructor(pictureId: string, originalUrl: string) {
+        this.pictureId = pictureId;
+        this.originalUrl = originalUrl;
+    }
+
+    public static of(picture: TransactionPictureInfoBasicResponse): TransactionPicture {
+        return new TransactionPicture(picture.pictureId, picture.originalUrl);
+    }
+
+    public static ofMulti(pictureResponses: TransactionPictureInfoBasicResponse[]): TransactionPicture[] {
+        const pictures: TransactionPicture[] = [];
+
+        for (const pictureResponse of pictureResponses) {
+            pictures.push(TransactionPicture.of(pictureResponse));
+        }
+
+        return pictures;
+    }
+}
+
 export interface TransactionPictureUnusedDeleteRequest {
     readonly id: string;
 }