From 109b9a117276235d156b97ffe1de0d11734bdcb3 Mon Sep 17 00:00:00 2001
From: Lucas Oliveira <lucas.edu.oli@hotmail.com>
Date: Tue, 5 Sep 2023 14:21:47 -0300
Subject: [PATCH] Added error checking when file is not a JSON

---
 .../components/PageComponent/index.tsx        |  9 +++++++-
 src/frontend/src/pages/MainPage/index.tsx     | 21 +++++++++++++++----
 2 files changed, 25 insertions(+), 5 deletions(-)

diff --git a/src/frontend/src/pages/FlowPage/components/PageComponent/index.tsx b/src/frontend/src/pages/FlowPage/components/PageComponent/index.tsx
index 620170fbb..4d8a4b3f4 100644
--- a/src/frontend/src/pages/FlowPage/components/PageComponent/index.tsx
+++ b/src/frontend/src/pages/FlowPage/components/PageComponent/index.tsx
@@ -298,7 +298,14 @@ export default function Page({
         setNodes((nds) => nds.concat(newNode));
       } else if (event.dataTransfer.types.some((types) => types === "Files")) {
         takeSnapshot();
-        uploadFlow(false, event.dataTransfer.files.item(0)!);
+        if (event.dataTransfer.files.item(0)!.type === "application/json") {
+          uploadFlow(true, event.dataTransfer.files.item(0)!);
+        } else {
+          setErrorData({
+            title: "Invalid file type",
+            list: ["Please upload a JSON file"],
+          });
+        }
       }
     },
     // Specify dependencies for useCallback
diff --git a/src/frontend/src/pages/MainPage/index.tsx b/src/frontend/src/pages/MainPage/index.tsx
index a599844eb..f45e4cfc8 100644
--- a/src/frontend/src/pages/MainPage/index.tsx
+++ b/src/frontend/src/pages/MainPage/index.tsx
@@ -7,6 +7,7 @@ import Header from "../../components/headerComponent";
 import { SkeletonCardComponent } from "../../components/skeletonCardComponent";
 import { Button } from "../../components/ui/button";
 import { USER_PROJECTS_HEADER } from "../../constants/constants";
+import { alertContext } from "../../contexts/alertContext";
 import { TabsContext } from "../../contexts/tabsContext";
 export default function HomePage(): JSX.Element {
   const {
@@ -19,6 +20,7 @@ export default function HomePage(): JSX.Element {
     uploadFlow,
     isLoading,
   } = useContext(TabsContext);
+  const { setErrorData } = useContext(alertContext);
   const dropdownOptions = [
     {
       name: "Import from JSON",
@@ -55,7 +57,14 @@ export default function HomePage(): JSX.Element {
     e.preventDefault();
     setIsDragging(false);
     if (e.dataTransfer.types.some((types) => types === "Files")) {
-      uploadFlow(true, e.dataTransfer.files.item(0)!);
+      if (e.dataTransfer.files.item(0).type === "application/json") {
+        uploadFlow(true, e.dataTransfer.files.item(0)!);
+      } else {
+        setErrorData({
+          title: "Invalid file type",
+          list: ["Please upload a JSON file"],
+        });
+      }
     }
   };
 
@@ -108,14 +117,18 @@ export default function HomePage(): JSX.Element {
           onDragLeave={dragLeave}
           onDrop={fileDrop}
           className={
-            "h-full w-full " + (isDragging
-              ? "flex flex-col items-center justify-center mb-24 gap-4 text-2xl font-light"
+            "h-full w-full " +
+            (isDragging
+              ? "mb-24 flex flex-col items-center justify-center gap-4 text-2xl font-light"
               : "")
           }
         >
           {isDragging ? (
             <>
-              <IconComponent name="ArrowUpToLine" className="h-12 w-12 stroke-1" />
+              <IconComponent
+                name="ArrowUpToLine"
+                className="h-12 w-12 stroke-1"
+              />
               Drop your flow here
             </>
           ) : (