Strengthen password requirement

frontend/src/components/utilities/checks/PasswordCheck.ts

@@ -17,6 +17,7 @@ const passwordCheck = ({
   setPasswordErrorLowerCase,
   errorCheck
 }: PasswordCheckProps) => {
+  
   if (!password || password.length < 14) {
     setPasswordErrorLength(true);
     errorCheck = true;

frontend/src/components/utilities/checks/checkPassword.ts

@@ -0,0 +1,65 @@
+type Errors = {
+    length?: string,
+    upperCase?: string,
+    lowerCase?: string,
+    number?: string,
+    specialChar?: string,
+    repeatedChar?: string,
+  };
+
+interface CheckPasswordParams {
+    password: string;
+    setErrors: (value: Errors) => void;
+}
+
+/**
+ * Validate that the password [password] is at least:
+ * - 8 characters long
+ * - Contains 1 uppercase character (A-Z)
+ * - Contains 1 lowercase character (a-z)
+ * - Contains 1 number (0-9)
+ * - Does not contain 3 repeat, consecutive characters
+ * 
+ * The function returns whether or not the password [password]
+ * passes the minimum requirements above. It sets errors on 
+ * an erorr object via [setErrors].
+ * 
+ * @param {Object} obj
+ * @param {String} obj.password - the password to check
+ * @param {Function} obj.setErrors - set state function to set error object
+ */
+const checkPassword = ({
+    password,
+    setErrors
+}: CheckPasswordParams): boolean => {
+    let errors: Errors = {}; 
+    
+    if (password.length < 8) {
+        errors.length = "8 characters";
+    }
+
+    if (!/[A-Z]/.test(password)) {
+        errors.upperCase = "1 uppercase character (A-Z)";
+    }
+
+    if (!/[a-z]/.test(password)) {
+        errors.lowerCase = "1 lowercase character (a-z)";
+    }
+
+    if (!/[0-9]/.test(password)) {
+        errors.number = "1 number (0-9)";
+    }
+
+    if (!/[!@#$%^&*(),.?":{}|<>]/.test(password)) {
+        errors.specialChar = "1 special character (!@#$%^&*(),.?)";
+    }
+
+    if (/([A-Za-z0-9])\1\1\1/.test(password)) {
+        errors.repeatedChar = "No 3 repeat, consecutive characters";
+    }
+    
+    setErrors(errors);
+    return Object.keys(errors).length > 0;
+}
+
+export default checkPassword;