add function to upload files to seqta's storage

src/seqta/utils/FileUpload.js

@@ -0,0 +1,43 @@
+/**
+ * Uploads an image file to a specified endpoint using a POST request.
+ *
+ * @param {File} file - The image file to be uploaded.
+ * @returns {Promise} A promise that resolves to the response from the server.
+ * @throws {Error} If no file is provided or if there is an error during upload.
+ */
+export async function UploadImage(file) {
+  // Ensuring that file is provided
+  if (!file) {
+    throw new Error("No file provided");
+  }
+
+  // Extracting the filename
+  const fileName = file.name;
+
+  // Assuming 'document.cookie' contains all the cookies in the format you provided
+  const cookies = document.cookie;
+
+  // Setting up the request options
+  const requestOptions = {
+    method: 'POST',
+    headers: {
+      'Cookie': cookies,
+      'X-File-Name': fileName
+    },
+    body: file // Binary file data
+  };
+
+  // Making the fetch request and returning the promise
+  return fetch('/seqta/student/file/upload/xhr2', requestOptions)
+    .then(response => {
+      if (!response.ok) {
+        throw new Error(`HTTP error! Status: ${response.status}`);
+      }
+      const json = response.json();
+      return `/seqta/student/load/file?type=message&file=${json.uuid}`;
+    })
+    .catch(error => {
+      console.error('Error during file upload:', error);
+      throw error;
+    });
+}