restore repo structure

client/src/Utils/stringUtils.js

@@ -0,0 +1,46 @@
+/**
+ * Helper function to get first letter capitalized string
+ * @param {string} str String whose first letter is to be capitalized
+ * @returns A string with first letter capitalized
+ */
+export const capitalizeFirstLetter = (str) => {
+	if (str === null || str === undefined) {
+		return "";
+	}
+	if (typeof str !== "string") {
+		throw new TypeError("Input must be a string");
+	}
+	if (str.length === 0) {
+		return "";
+	}
+	return str.charAt(0).toUpperCase() + str.slice(1);
+};
+
+/**
+ * Helper function to get first letter as a lower case string
+ * @param {string} str String whose first letter is to be lower cased
+ * @returns A string with first letter lower cased
+ */
+
+export const toLowerCaseFirstLetter = (str) => {
+	if (str === null || str === undefined) {
+		return "";
+	}
+	if (typeof str !== "string") {
+		throw new TypeError("Input must be a string");
+	}
+	if (str.length === 0) {
+		return "";
+	}
+	return str.charAt(0).toLowerCase() + str.slice(1);
+};
+
+/**
+ * Checks if a string is null, undefined, or empty (including strings with only whitespace).
+ * @param {string} str - The string to check.
+ * @returns {boolean} - Returns true if the string is null, undefined, or empty.
+ */
+export const isEmpty = (str) => {
+	// Check if string is null, undefined, or empty (including whitespace only)
+	return str === null || typeof str === "undefined" || str.trim().length === 0;
+};