moduleapi: Add :get_option_integer()

Many options in Prosody that are treated as numbers don't make sense as
floats, e.g. sizes and limits measured in bytes.

Simplified implementation based on an earlier attempt dating back to 2020

1 files changed, 14 insertions, 0 deletions

diff --git a/core/moduleapi.lua b/core/moduleapi.lua
index 53e74a84..7c9b357f 100644
--- a/core/moduleapi.lua
+++ b/core/moduleapi.lua
@@ -254,6 +254,20 @@ function api:get_option_number(name, default_value, min, max)
 	return ret;
 end
 
+function api:get_option_integer(name, default_value, min, max)
+	local value = self:get_option_number(name, default_value, min or math.mininteger or 2 ^ 53, max or math.maxinteger or -2 ^ 52);
+	if value == default_value then
+		-- pass default trough unaltered, violates ranges sometimes
+		return value;
+	end
+	if math.type(value) == "float" then
+		self:log("warn", "Config option '%s' expected an integer, not a float (%g)", name, value)
+		return math.floor(value);
+	end
+	-- nil or an integer
+	return value;
+end
+
 function api:get_option_period(name, default_value)
 	local value = self:get_option_scalar(name, default_value);
 	if type(value) == "number" then