fixed ask_yn

spells/cantrips/ask_yn

@@ -1,35 +1,47 @@
 #!/bin/sh
 
-# Define ask_yn, which asks a yes or no question and outputs the result as 1 for Yes and 0 for No.
-# Takes two arguments:
-# $1: The question to be asked.
-# $2: The default answer, either "y" or "n".
+# Define ask_yn, which asks a yes or no question and defaults to the specified choice.
+# Outputs 1 for yes and 0 for no
 
 ask_yn() {
-    question=$1
-    default_answer=$2
-
-    # Capitalize the default option correctly
-    if [ "$default_answer" = "n" ] || [ "$default_answer" = "N" ]; then
-        prompt="${question} (y/N): "
+    default=${2:-"y"}
+    default=$(echo "$default" | tr '[:upper:]' '[:lower:]')
+    if [ "$default" = "y" ]; then
+        prompt="${1} (Y/n): "
+        default_output=1
     else
-        prompt="${question} (Y/n): "
+        prompt="${1} (y/N): "
+        default_output=0
     fi
-
+    
     while true; do
+        # Show prompt and get user input
         printf "%s" "$prompt"
-        STTY_CONFIG=$(stty -g)	# Save current stty config
-        stty raw -echo		# Disable echo
-        ANSWER=$(head -c 1)		# Scrape terminal input
-        stty $STTY_CONFIG		# Restore stty config
+        if [ "$(uname)" = "Darwin" ]; then
+            # On macOS, use "read -n 1"
+            read -n 1 -r REPLY
+        else
+            # On Linux and others, use "read -n 1 -s"
+            read -r -n 1 -s REPLY
+        fi
 
-        case $ANSWER in
-            [Yy] ) echo "Y"; exit 1;;   # Yes: exit with 1
-            [Nn] ) echo "N"; exit 0;;   # No: exit with 0
-            "" ) if [ "$default_answer" = "n" ] || [ "$default_answer" = "N" ]; then echo "N"; exit 0; else echo "Y"; exit 1; fi;;   # Default: exit with the default value
-            * ) printf "\nPlease answer Yes or No.\n";;
+        # If user hits Ctrl+C or Enter, break and return default output
+        if [ -z "$REPLY" ] || [ "$REPLY" = "$(printf '\003')" ]; then
+            REPLY=$default
+            printf "\n"
+            break
+        fi
+        
+        case "$REPLY" in
+            y|Y ) printf "\n"; return 1;;
+            n|N ) printf "\n"; return 0;;
+            * ) printf "\nInvalid input. Please type 'y' or 'n'.";;
         esac
     done
+    return $default_output
 }
 
-ask_yn "$@"
+# Call the function if this script is being run directly
+if [ "${BASH_SOURCE[0]}" = "$0" ]; then
+    ask_yn "$@"
+fi