From e937f5ff67eaf1dc87f8d9b0502dd0825ed9b5bd Mon Sep 17 00:00:00 2001
From: Thomas Rudin <thomas@rudin.li>
Date: Thu, 6 Jun 2019 18:54:46 +0200
Subject: [PATCH] Add /xban_cleanup command to purge unbanned entries (#20)

Add documentation for /xban_cleanup
---
 README.md |  6 ++++++
 init.lua  | 25 +++++++++++++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/README.md b/README.md
index 90eed0d..75f8e88 100644
--- a/README.md
+++ b/README.md
@@ -104,3 +104,9 @@ the supported import plugins at the time of writing:
 * `v2`: Old format used by xban (`players.iplist.v2`).
 
 **Example:** `/xban_dbi minetest`
+
+### `xban_cleanup`
+
+Removes all non-banned entries from the xban db.
+
+**Usage:** `/xban_cleanup`
diff --git a/init.lua b/init.lua
index 6f15f14..68a3508 100644
--- a/init.lua
+++ b/init.lua
@@ -314,6 +314,7 @@ minetest.register_chatcommand("xban_wl", {
 	end,
 })
 
+
 local function check_temp_bans()
 	minetest.after(60, check_temp_bans)
 	local to_rm = { }
@@ -374,6 +375,30 @@ local function load_db()
 	end
 end
 
+minetest.register_chatcommand("xban_cleanup", {
+	description = "Removes all non-banned entries from the xban db",
+	privs = { server=true },
+	func = function(name, params)
+		local old_count = #db
+
+		local i = 1
+		while i <= #db do
+			if not db[i].banned then
+				-- not banned, remove from db
+				table.remove(db, i)
+			else
+				-- banned, hold entry back
+				i = i + 1
+			end
+		end
+
+		-- save immediately
+		save_db()
+
+		return true, "Removed " .. (old_count - #db) .. " entries, new db entry-count: " .. #db
+	end,
+})
+
 minetest.register_on_shutdown(save_db)
 minetest.after(SAVE_INTERVAL, save_db)
 load_db()