feat: add window_type for limit-count

Signed-off-by: Sihyeon Jang <[email protected]>

Author: sihyeonn

apisix/plugins/limit-count/init.lua

@@ -72,6 +72,11 @@ local schema = {
     properties = {
         count = {type = "integer", exclusiveMinimum = 0},
         time_window = {type = "integer",  exclusiveMinimum = 0},
+        window_type = {
+            type = "string",
+            enum = {"fixed", "sliding"},
+            default = "fixed",
+        },
         group = {type = "string"},
         key = {type = "string", default = "remote_addr"},
         key_type = {type = "string",
@@ -137,6 +142,12 @@ function _M.check_schema(conf, schema_type)
         return false, err
     end
 
+    if (not conf.policy or conf.policy == "local")
+       and conf.window_type and conf.window_type ~= "fixed"
+    then
+        return false, "window_type \"sliding\" is only supported when policy is \"redis\" or \"redis-cluster\""
+    end
+
     if conf.group then
         -- means that call by some plugin not support
         if conf._vid then
@@ -184,12 +195,12 @@ local function create_limit_obj(conf, plugin_name)
 
     if conf.policy == "redis" then
         return limit_redis_new("plugin-" .. plugin_name,
-                               conf.count, conf.time_window, conf)
+                               conf.count, conf.time_window, conf.window_type, conf)
     end
 
     if conf.policy == "redis-cluster" then
         return limit_redis_cluster_new("plugin-" .. plugin_name, conf.count,
-                                       conf.time_window, conf)
+                                       conf.time_window, conf.window_type, conf)
     end
 
     return nil