Add //drain

ChatCommands.md

@@ -291,6 +291,12 @@ Fixes the lighting in the current WorldEdit region.
 
     //fixlight
 
+### `//drain`
+
+Removes any fluid node within the current WorldEdit region.
+
+    //drain
+
 ### `//hide`
 
 Hide all nodes in the current WorldEdit region non-destructively.

worldedit_commands/init.lua

@@ -838,6 +838,30 @@ minetest.register_chatcommand("/fixlight", {
 	end),
 })
 
+minetest.register_chatcommand("/drain", {
+	params = "",
+	description = "Remove any fluid node within the current WorldEdit region",
+	privs = {worldedit=true},
+	func = safe_region(function(name, param)
+		-- TODO: make an API function for this
+		local count = 0
+		local pos1, pos2 = worldedit.sort_pos(worldedit.pos1[name], worldedit.pos2[name])
+		for x = pos1.x, pos2.x do
+		for y = pos1.y, pos2.y do
+		for z = pos1.z, pos2.z do
+			local n = minetest.get_node({x=x, y=y, z=z}).name
+			local d = minetest.registered_nodes[n]
+			if d ~= nil and (d["drawtype"] == "liquid" or d["drawtype"] == "flowingliquid") then
+				minetest.remove_node({x=x, y=y, z=z})
+				count = count + 1
+			end
+		end
+		end
+		end
+		worldedit.player_notify(name, count .. " nodes updated")
+	end),
+})
+
 minetest.register_chatcommand("/hide", {
 	params = "",
 	description = "Hide all nodes in the current WorldEdit region non-destructively",