[MIRROR] Admin lua scripting (#65635) (#15118)

[Ready for Review] Admin lua scripting (#65635)

Co-authored-by: Mothblocks <35135081+Mothblocks@users.noreply.github.com>

Co-authored-by: Y0SH1M4S73R <legoboyo@earthlink.net>
Co-authored-by: Mothblocks <35135081+Mothblocks@users.noreply.github.com>

code/modules/admin/verbs/lua/helpers.dm

@@ -0,0 +1,32 @@
+#define PROMISE_PENDING 0
+#define PROMISE_RESOLVED 1
+#define PROMISE_REJECTED 2
+
+/**
+ * Auxtools hooks act as "set waitfor = 0" procs. This means that whenever
+ * a proc directly called from auxtools sleeps, the hook returns with whatever
+ * the called proc had as its return value at the moment it slept. This may not
+ * be desired behavior, so this datum exists to wrap these procs.
+ */
+/datum/auxtools_promise
+	var/datum/callback/callback
+	var/return_value
+	var/runtime_message
+	var/status = PROMISE_PENDING
+
+/datum/auxtools_promise/New(...)
+	callback = CALLBACK(arglist(args))
+	perform()
+
+/datum/auxtools_promise/proc/perform()
+	set waitfor = 0
+	try
+		return_value = callback.Invoke()
+		status = PROMISE_RESOLVED
+	catch(var/exception/e)
+		runtime_message = e.name
+		status = PROMISE_REJECTED
+
+#undef PROMISE_PENDING
+#undef PROMISE_RESOLVED
+#undef PROMISE_REJECTED