From be8ceb2652d061db359575671e9df6b5b0128c8e Mon Sep 17 00:00:00 2001
From: fdai7057 <julius-philipp.engel@informatik.hs-fulda.de>
Date: Sat, 4 Feb 2023 14:06:14 +0100
Subject: [PATCH] Modified error handling. The error for invalid input for
 forename and surname when creating a new customer account is caught.

---
 src/createCustomer.c |  9 ++++++++-
 src/error.c          | 10 ++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/src/createCustomer.c b/src/createCustomer.c
index d6226ee..e3a9920 100644
--- a/src/createCustomer.c
+++ b/src/createCustomer.c
@@ -31,10 +31,14 @@ void collectCustomerProperties()
 	}
 	if(inputTooLong){
 		errorMessage(-7);
-	}else{
+	}
+	else{
 	*(instance.forename+letterCounter) = '\0';
 	letterCounter = 0;
 	}
+	if(!isLetterOfAlphabet(instance.forename)){
+		errorMessage(-10);
+	}
 	printf("Enter surname (max. 15 letters):\n");
 	while(letterCounter<letterMaximum && (userInput=getchar())!='\n'){
 		*(instance.surname+letterCounter) = userInput;
@@ -50,6 +54,9 @@ void collectCustomerProperties()
 	*(instance.surname+letterCounter) = '\0';
 	letterCounter = 0;
 	}
+	if(!isLetterOfAlphabet(instance.surname)){
+		errorMessage(-11);
+	}
 	printf("Enter password (max. 20 letters):\n");
 	while(letterCounter<letterMaximum && (userInput=getchar())!='\n'){
 		*(instance.password+letterCounter) = userInput;
diff --git a/src/error.c b/src/error.c
index 137b60c..68294c1 100644
--- a/src/error.c
+++ b/src/error.c
@@ -45,6 +45,16 @@ int errorMessage(int errorCode)
 		returnValue = -9;
 		exit(-1);
 		break;
+	case -10:
+		puts("You have entered a digit for your forename. This is not allowed. Aborting!");
+		returnValue = -10;
+		exit(-1);
+		break;
+	case -11:
+		puts("You have entered a digit for your surname. This is not allowed. Aborting!");
+		returnValue = -11;
+		exit(-1);
+		break;
 	default:
 		puts("Error code unknown.");
 	}