fix: Check uploaded file size in widget and dashboard (#1975)

* File size check logic in widget

* set maxium file size

* update locale texts

* file size check in dashboard

* dynamincally set file size limit error message

* code climate review fixes

* add alert mixin

* move attahcment bus event to constants

* Move file size check logic to helper

* add specs for file size limit check helper

* changes as per review

app/javascript/shared/helpers/FileHelper.js

@@ -0,0 +1,25 @@
+export const formatBytes = (bytes, decimals = 2) => {
+  if (bytes === 0) return '0 Bytes';
+
+  const k = 1024;
+  const dm = decimals < 0 ? 0 : decimals;
+  const sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
+
+  const i = Math.floor(Math.log(bytes) / Math.log(k));
+
+  return parseFloat((bytes / Math.pow(k, i)).toFixed(dm)) + ' ' + sizes[i];
+};
+
+export const fileSizeInMegaBytes = bytes => {
+  if (bytes === 0) {
+    return 0;
+  }
+  const sizeInMB = (bytes / (1024 * 1024)).toFixed(2);
+  return sizeInMB;
+};
+
+export const checkFileSizeLimit = (file, maximumUploadLimit) => {
+  const fileSize = file?.file?.size;
+  const fileSizeInMB = fileSizeInMegaBytes(fileSize);
+  return fileSizeInMB <= maximumUploadLimit;
+};