Add timezone offset setting

Clarify timezone offset tooltip

Co-authored-by: y5nw <[email protected]>

ui/message.lua

@@ -58,7 +58,8 @@ function mail.show_message(name, id)
 	local cc = minetest.formspec_escape(message.cc) or ""
 	if string.len(cc) > 50 then cc = string.sub(cc, 1, 47) .. "..." end
 	local date = type(message.time) == "number"
-		and minetest.formspec_escape(os.date(mail.get_setting(name, "date_format"), message.time)) or ""
+		and minetest.formspec_escape(os.date(mail.get_setting(name, "date_format"),
+		message.time+3600*mail.get_setting(name, "timezone_offset"))) or ""
 	local subject = minetest.formspec_escape(message.subject) or ""
 	local body = minetest.formspec_escape(message.body) or ""
 	formspec = string.format(formspec, from, to, cc, date, subject, body)

util/settings.lua

@@ -45,6 +45,10 @@ mail.settings = {
         type = "string", default = "%Y-%m-%d %X", group = "other", index = 3, label = S("Date format"),
         dataset = {"%Y-%m-%d %X", "%d/%m/%y %X", "%A %d %B %Y %X"}, format = os.date
     },
+    timezone_offset = {
+        type = "number", default = 0, group = "other", index = 4,
+        label = S("Timezone offset"), tooltip = S("Offset to add to server time."),
+    },
     mute_list = {
         type = "list", default = {}, group = "spam", index = 1,
         label = S("Mute list")