From e2fdc6aee4baf5939266a68938c359bf635f2d05 Mon Sep 17 00:00:00 2001
From: Ben Harris <ben@tilde.team>
Date: Wed, 1 Dec 2021 10:22:00 -0500
Subject: [PATCH] use current date(1) if $1 is missing

---
 aoc2021/getday.sh | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/aoc2021/getday.sh b/aoc2021/getday.sh
index eb7faa0..e9d8d6a 100644
--- a/aoc2021/getday.sh
+++ b/aoc2021/getday.sh
@@ -5,9 +5,18 @@
 if [ -z "$session" ]; then
   printf "missing session cookie\n"
 fi
-  
-curl -s https://adventofcode.com/2021/day/"$1"/input \
-  --cookie "session=$session" \
-  -o "$(printf "input/day%02d.in" "$1")"
 
-sed "s/XX/$1/g" DayXX.cs.txt > "$(printf "Day%02d.cs" "$1")"
+if [ -z "$1" ]; then
+  day=$(date +"%e" | xargs)
+else
+  day="$1"
+fi
+  
+curl -s https://adventofcode.com/2021/day/"$day"/input \
+  --cookie "session=$session" \
+  -o "$(printf "input/day%02d.in" "$day")"
+
+class=$(printf "Day%02d.cs" "$day")
+if [ ! -f "$class" ]; then
+  sed "s/XX/$1/g" DayXX.cs.txt > "$class"
+fi