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calcom/packages/lib/sanitizeCalendarObject.ts

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+import type { DAVObject } from "tsdav";
+
+/**
+ * sanitizeCalendarObject is a utility function that cleans up and normalizes
+ * the iCalendar data from a DAVObject before parsing it using the ICAL.js library.
+ * It addresses issues with incorrect line endings, line folding, and unwanted line
+ * breaks before colons, semicolons, and equal signs.
+ *
+ * @param {DAVObject} obj - The DAVObject containing the iCalendar data to be sanitized.
+ * @returns {string} The sanitized iCalendar data.
+ *
+ * NOTE: This function is a workaround for handling improperly formatted iCalendar
+ * data. It is recommended to use a well-formed iCalendar data source to avoid
+ * the need for these manual corrections. This function may not cover all edge cases
+ * and might still cause issues with specific inputs.
+ */
+
+export const sanitizeCalendarObject = (obj: DAVObject) => {
+  return obj.data
+    .replaceAll("\r\n", "\n")
+    .replaceAll("\r", "\n")
+    .replaceAll("\n ", "")
+    .replaceAll("\n\t", "")
+    .replaceAll("\n", "\r\n")
+    .replaceAll(/(:[ \t]*\r\n[ \t]*:)/gm, ":")
+    .replaceAll(/(;[ \t]*\r\n[ \t]*;)/gm, ";")
+    .replaceAll(/(=[ \t]*\r\n[ \t]*=)/gm, "=");
+};
+
+export default sanitizeCalendarObject;