inproved -1counter function

Author: serghey-rodin

func/shared.func

@@ -730,29 +730,22 @@ is_type_valid() {
 
 decrease_user_value() {
     USER="$1"
-    key="$2"
-    conf="$V_USERS/$USER/user.conf"
-
-    # Deleting $
-    key=$(echo "${key//$/}")
+    key="${2//$}"
 
     # Parsing current value
-    current_value=$(grep "$key=" $conf |cut -f 2 -d \')
-
-    # Checking result
-    if [ -z "$current_value" ]; then
-        echo "Error: Parsing error"
-        log_event 'debug' "$E_PARSING $V_EVENT"
-        exit $E_PARSING
+    conf="$V_USERS/$USER/user.conf"
+    old=$(grep "$key=" $conf | cut -f 2 -d \')
+    if [ -z "$old" ]; then
+        old=0
     fi
 
-    # Checking zero val
-    if [ "$current_value" -gt 0 ]; then
-        # Minus one
-        new_value=$(expr $current_value - 1 )
-        # Changing config
-        sed -i "s/$key='$current_value'/$key='$new_value'/g" $conf
+    # Decreasing
+    if [ "$old" -le 1 ]; then
+        new=0
+    else
+        new=$((old - 1 ))
     fi
+    sed -i "s/$key='$old'/$key='$new'/g" $conf
 }