From f490cdf35765813ea23b15ae248853f76a5da172 Mon Sep 17 00:00:00 2001
From: WJ Liu <2306079+multiSnow@users.noreply.github.com>
Date: Wed, 3 May 2023 21:04:23 +0800
Subject: Add alert function to pacrunner (#196)

* add alert function to pacrunners

* code style and commentgoit
---
 .../plugins/pacrunner-duktape/pacrunner-duktape.c   | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/src/backend/plugins/pacrunner-duktape/pacrunner-duktape.c b/src/backend/plugins/pacrunner-duktape/pacrunner-duktape.c
index 3676e48..3845fca 100644
--- a/src/backend/plugins/pacrunner-duktape/pacrunner-duktape.c
+++ b/src/backend/plugins/pacrunner-duktape/pacrunner-duktape.c
@@ -103,6 +103,24 @@ my_ip_address (duk_context *ctx)
   return duk_error (ctx, DUK_ERR_ERROR, "Unable to find hostname!");
 }
 
+static duk_ret_t
+alert (duk_context *ctx)
+{
+  const char *str = NULL;
+
+  /* do nothing if PX_DEBUG_PACALERT environment is not set */
+  if (!getenv ("PX_DEBUG_PACALERT"))
+    return 0;
+
+  /* only get first argument of alert() as string */
+  str = duk_get_string (ctx, 0);
+  if (!str)
+    return 0;
+
+  fprintf (stderr, "PAC-alert: %s\n", str);
+  return 0;
+}
+
 static void
 px_pacrunner_duktape_init (PxPacRunnerDuktape *self)
 {
@@ -116,6 +134,9 @@ px_pacrunner_duktape_init (PxPacRunnerDuktape *self)
   duk_push_c_function (self->ctx, my_ip_address, 1);
   duk_put_global_string (self->ctx, "myIpAddress");
 
+  duk_push_c_function (self->ctx, alert, 1);
+  duk_put_global_string (self->ctx, "alert");
+
   duk_push_string (self->ctx, JAVASCRIPT_ROUTINES);
   if (duk_peval_noresult (self->ctx))
     goto error;
-- 
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