From 3267a8d6f1c7226715c6697ddf5bcb3b6c4be7d0 Mon Sep 17 00:00:00 2001
From: Michael Stapelberg <michael@stapelberg.de>
Date: Sat, 29 Sep 2012 17:10:48 +0200
Subject: [PATCH] implement depositing when the user cannot purchase an item

---
 include/credit_manager.h |  1 +
 src/credit_manager.c     | 20 +++++++++++---------
 src/kasse.c              | 12 ++++++++----
 3 files changed, 20 insertions(+), 13 deletions(-)

diff --git a/include/credit_manager.h b/include/credit_manager.h
index 60eea81..c5dfb99 100644
--- a/include/credit_manager.h
+++ b/include/credit_manager.h
@@ -1,5 +1,6 @@
 #ifndef CREDIT_MANAGER_H_
 #define CREDIT_MANAGER_H_
 struct credits_t *find_credit(char *name);
+void deposit_credit();
 void credit_manager();
 #endif
diff --git a/src/credit_manager.c b/src/credit_manager.c
index ac6fb0a..277df54 100644
--- a/src/credit_manager.c
+++ b/src/credit_manager.c
@@ -52,20 +52,22 @@ struct credits_t *find_credit(char *name){
 }
 
 /*
- * when depositing money with this and returning to the main menu, the program
- * will crash with a message like the following:
+ * Deposits credit for a user. Called in the credit manager (with input ==
+ * NULL) or interactively when the user does not have enough money for his
+ * intended purchase (with input == nickname).
  * 
  */
-static void deposit_credit() {
+void deposit_credit(char *input) {
 	char *time = get_time();
-	char *input;
 	struct credits_t *credit;
 	unsigned int deposit;
 
-	cprintf("\r\nName:\r\n");
-	if ((input = get_input()) == NULL || *input == '\0')
-		return; // no name given
-		
+	if (input == NULL) {
+		cprintf("\r\nName:\r\n");
+		if ((input = get_input()) == NULL || *input == '\0')
+			return; // no name given
+	}
+
 	if ((credit = find_credit(input)) == NULL)
 		return; // cannot find named credit
 	
@@ -163,7 +165,7 @@ void credit_manager(){
 					current_credits_page--;
 				break;
 			case 'p':
-				deposit_credit(); break;
+				deposit_credit(NULL); break;
 			case 'g':
 				cprintf("Filter eingeben:\r\n");
 				filter = get_input();
diff --git a/src/kasse.c b/src/kasse.c
index 5c0ddb9..40bfbf5 100644
--- a/src/kasse.c
+++ b/src/kasse.c
@@ -151,10 +151,14 @@ static signed int buy(char *name, unsigned int price) {
 		 * to NULL if no such credit could be found */
 		credit = find_credit(nickname);
 		if (credit != NULL) {
-			if ((signed int)credit->credit < ((signed int)price * einheiten)) {
-				cprintf("Sorry, %s hat nicht genug Geld :-(\r\n", nickname);
-				get_input();
-				return 0;
+			while ((signed int)credit->credit < ((signed int)price * einheiten)) {
+				cprintf("%s hat nicht genug Geld. e) einzahlen a) abbruch \r\n", nickname);
+				c = cgetc();
+				if (c == 'e') {
+					deposit_credit(nickname);
+				} else {
+					return 0;
+				}
 			}
 			/* substract money */
 			credit->credit -= (price * einheiten);
-- 
2.39.2