From a8eb1a9f1fd59741f4b4a8c1c79155161f574857 Mon Sep 17 00:00:00 2001
From: Vsevolod Stakhov <vsevolod@highsecure.ru>
Date: Mon, 18 Mar 2019 17:23:22 +0000
Subject: [PATCH] [Minor] Add task:get_reply_sender method

---
 src/lua/lua_task.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/src/lua/lua_task.c b/src/lua/lua_task.c
index 8e1a851b4..c762eb173 100644
--- a/src/lua/lua_task.c
+++ b/src/lua/lua_task.c
@@ -424,6 +424,16 @@ LUA_FUNCTION_DEF (task, get_recipients);
  * @return {string} principal recipient
  */
 LUA_FUNCTION_DEF (task, get_principal_recipient);
+/***
+ * @method task:get_reply_sender()
+ * Returns a single string with address that should be used to reply on a message
+ *
+ * - reply-to header
+ * - from header
+ * - smtp from as a last resort
+ * @return {address} email address
+ */
+LUA_FUNCTION_DEF (task, get_sender);
 
 /***
  * @method task:set_recipients([type], {rcpt1, rcpt2...})
@@ -1039,6 +1049,7 @@ static const struct luaL_reg tasklib_m[] = {
 	LUA_INTERFACE_DEF (task, get_recipients),
 	LUA_INTERFACE_DEF (task, set_recipients),
 	LUA_INTERFACE_DEF (task, get_principal_recipient),
+	LUA_INTERFACE_DEF (task, get_reply_sender),
 	LUA_INTERFACE_DEF (task, has_from),
 	LUA_INTERFACE_DEF (task, get_from),
 	LUA_INTERFACE_DEF (task, set_from),
@@ -3274,6 +3285,44 @@ lua_task_get_principal_recipient (lua_State *L)
 	return 1;
 }
 
+static gint
+lua_task_get_reply_sender (lua_State *L)
+{
+	LUA_TRACE_POINT;
+	struct rspamd_task *task = lua_check_task (L, 1);
+	struct rspamd_mime_header *rh;
+
+	if (task) {
+		GPtrArray *ar;
+
+		ar = rspamd_message_get_header_array (task, "Reply-To", false);
+
+		if (ar && ar->len == 1) {
+			rh = (struct rspamd_mime_header *)g_ptr_array_index (ar, 0);
+			lua_pushstring (L, rh->decoded);
+		}
+		else if (task->from_mime && task->from_mime->len == 1) {
+			struct rspamd_email_address *addr;
+
+			addr = (struct rspamd_email_address *)g_ptr_array_index (task->from_mime, 0);
+
+			lua_pushlstring (L, addr->addr, addr->addr_len);
+		}
+		else if (task->from_envelope) {
+			lua_pushlstring (L, task->from_envelope->addr,
+					task->from_envelope->addr_len);
+		}
+		else {
+			lua_pushnil (L);
+		}
+	}
+	else {
+		return luaL_error (L, "invalid arguments");
+	}
+
+	return 1;
+}
+
 static gint
 lua_task_get_user (lua_State *L)
 {
-- 
2.39.5