refactor: Tidy if statement into concatenation

auto-notify.plugin.zsh

@@ -62,19 +62,17 @@ function _auto_notify_message() {
         fi
 
     elif [[ "$platform" == "Darwin" ]]; then
-        if [[ -z "$AUTO_NOTIFY_SOUND" ]]; then
-            osascript \
-              -e 'on run argv' \
-              -e 'display notification (item 1 of argv) with title (item 2 of argv)' \
-              -e 'end run' \
-              "$body" "$title"
-        else
-            osascript \
-              -e 'on run argv' \
-              -e 'display notification (item 1 of argv) with title (item 2 of argv) sound name (item 3 of argv)' \
-              -e 'end run' \
-              "$body" "$title" "$AUTO_NOTIFY_SOUND"
+        notification_command="display notification (item 1 of argv) with title (item 2 of argv)"
+        notification_body=($body $title)
+        if [[ ! -z "$AUTO_NOTIFY_SOUND" ]]; then
+            notification_command+=" sound name (item 3 of argv)"
+            notification_body+=("$AUTO_NOTIFY_SOUND")
         fi
+         osascript \
+              -e 'on run argv' \
+              -e ${notification_command[@]} \
+              -e 'end run' \
+              ${notification_body[@]}
     else
         printf "Unknown platform for sending notifications: $platform\n"
         printf "Please post an issue on gitub.com/MichaelAquilina/zsh-auto-notify/issues/\n"