Rollback fixes and get_node_actions

builtin/chatcommands.lua

@@ -515,34 +515,45 @@ minetest.register_on_punchnode(function(pos, node, puncher)
 end)
 
 minetest.register_chatcommand("rollback_check", {
-	params = "[<range>] [<seconds>]",
+	params = "[<range>] [<seconds>] [limit]",
 	description = "check who has last touched a node or near it, "..
-			"max. <seconds> ago (default range=0, seconds=86400=24h)",
+			"max. <seconds> ago (default range=0, seconds=86400=24h, limit=5)",
 	privs = {rollback=true},
 	func = function(name, param)
-		local range, seconds = string.match(param, "(%d+) *(%d*)")
+		local range, seconds, limit =
+			param:match("(%d+) *(%d*) *(%d*)")
 		range = tonumber(range) or 0
 		seconds = tonumber(seconds) or 86400
-		minetest.chat_send_player(name, "Punch a node (limits set: range="..
-				dump(range).." seconds="..dump(seconds).."s)")
-		minetest.rollback_punch_callbacks[name] = function(pos, node, puncher)
-			local name = puncher:get_player_name()
-			minetest.chat_send_player(name, "Checking...")
-			local actor, act_p, act_seconds =
-					minetest.rollback_get_last_node_actor(pos, range, seconds)
-			if actor == "" then
-				minetest.chat_send_player(name, "Nobody has touched the "..
-						"specified location in "..dump(seconds).." seconds")
+		limit = tonumber(limit) or 5
+		if limit > 100 then
+			minetest.chat_send_player(name, "That limit is too high!")
 			return
 		end
-			local nodedesc = "this node"
-			if act_p.x ~= pos.x or act_p.y ~= pos.y or act_p.z ~= pos.z then
-				nodedesc = minetest.pos_to_string(act_p)
+		minetest.chat_send_player(name, "Punch a node (range="..
+				range..", seconds="..seconds.."s, limit="..limit..")")
+
+		minetest.rollback_punch_callbacks[name] = function(pos, node, puncher)
+			local name = puncher:get_player_name()
+			minetest.chat_send_player(name, "Checking "..minetest.pos_to_string(pos).."...")
+			local actions = minetest.rollback_get_node_actions(pos, range, seconds, limit)
+			local num_actions = #actions
+			if num_actions == 0 then
+				minetest.chat_send_player(name, "Nobody has touched the "..
+						"specified location in "..seconds.." seconds")
+				return
+			end
+			local time = os.time()
+			for i = num_actions, 1, -1 do
+				local action = actions[i]
+				minetest.chat_send_player(name,
+					("%s %s %s -> %s %d seconds ago.")
+						:format(
+							minetest.pos_to_string(action.pos),
+							action.actor,
+							action.oldnode.name,
+							action.newnode.name,
+							time - action.time))
 			end
-			local nodename = minetest.get_node(act_p).name
-			minetest.chat_send_player(name, "Last actor on "..nodedesc..
-					" was "..actor..", "..dump(act_seconds)..
-					"s ago (node is now "..nodename..")")
 		end
 	end,
 })
@@ -554,7 +565,7 @@ minetest.register_chatcommand("rollback", {
 	func = function(name, param)
 		local target_name, seconds = string.match(param, ":([^ ]+) *(%d*)")
 		if not target_name then
-			local player_name = nil;
+			local player_name = nil
 			player_name, seconds = string.match(param, "([^ ]+) *(%d*)")
 			if not player_name then
 				minetest.chat_send_player(name, "Invalid parameters. See /help rollback and /help rollback_check")
@@ -564,13 +575,13 @@ minetest.register_chatcommand("rollback", {
 		end
 		seconds = tonumber(seconds) or 60
 		minetest.chat_send_player(name, "Reverting actions of "..
-				dump(target_name).." since "..dump(seconds).." seconds.")
+				target_name.." since "..seconds.." seconds.")
 		local success, log = minetest.rollback_revert_actions_by(
 				target_name, seconds)
-		if #log > 10 then
+		if #log > 100 then
 			minetest.chat_send_player(name, "(log is too long to show)")
 		else
-			for _,line in ipairs(log) do
+			for _, line in pairs(log) do
 				minetest.chat_send_player(name, line)
 			end
 		end

builtin/deprecated.lua

@@ -46,3 +46,8 @@ setmetatable(minetest.env, {
 		return rawget(table, key)
 	end
 })
+
+function minetest.rollback_get_last_node_actor(pos, range, seconds)
+	return minetest.rollback_get_node_actions(pos, range, seconds, 1)[1]
+end
+

doc/lua_api.txt

@@ -1402,8 +1402,8 @@ minetest.handle_node_drops(pos, drops, digger)
 ^ Can be overridden to get different functionality (eg. dropping items on
   ground)
 
-Rollbacks:
-minetest.rollback_get_last_node_actor(p, range, seconds) -> actor, p, seconds
+Rollback:
+minetest.rollback_get_node_actions(pos, range, seconds, limit) -> {{actor, pos, time, oldnode, newnode}, ...}
 ^ Find who has done something to a node, or near a node
 ^ actor: "player:<name>", also "liquid".
 minetest.rollback_revert_actions_by(actor, seconds) -> bool, log messages

src/rollback.h

@@ -40,13 +40,13 @@ public:
 
 	virtual ~IRollbackManager() {}
 	virtual void flush() = 0;
-	// Get last actor that did something to position p, but not further than
+	// Get all actors that did something to position p, but not further than
 	// <seconds> in history
-	virtual std::string getLastNodeActor(v3s16 p, int range, int seconds,
-			v3s16 *act_p, int *act_seconds) = 0;
+	virtual std::list<RollbackAction> getNodeActors(v3s16 pos, int range,
+	                time_t seconds, int limit) = 0;
 	// Get actions to revert <seconds> of history made by <actor>
 	virtual std::list<RollbackAction> getRevertActions(const std::string &actor,
-			int seconds) = 0;
+	                time_t seconds) = 0;
 };
 
 IRollbackManager *createRollbackManager(const std::string &filepath, IGameDef *gamedef);

src/rollback_interface.h

@@ -63,7 +63,7 @@ struct RollbackAction
 		TYPE_MODIFY_INVENTORY_STACK,
 	} type;
 
-	int unix_time;
+	time_t unix_time;
 	std::string actor;
 	bool actor_is_guess;
 

src/script/lua_api/l_rollback.cpp

@@ -24,21 +24,54 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "rollback.h"
 
 
-// rollback_get_last_node_actor(p, range, seconds) -> actor, p, seconds
-int ModApiRollback::l_rollback_get_last_node_actor(lua_State *L)
+void push_RollbackNode(lua_State *L, RollbackNode &node)
 {
-	v3s16 p = read_v3s16(L, 1);
+	lua_createtable(L, 0, 3);
+	lua_pushstring(L, node.name.c_str());
+	lua_setfield(L, -2, "name");
+	lua_pushnumber(L, node.param1);
+	lua_setfield(L, -2, "param1");
+	lua_pushnumber(L, node.param2);
+	lua_setfield(L, -2, "param2");
+}
+
+// rollback_get_node_actions(pos, range, seconds, limit) -> {{actor, pos, time, oldnode, newnode}, ...}
+int ModApiRollback::l_rollback_get_node_actions(lua_State *L)
+{
+	v3s16 pos = read_v3s16(L, 1);
 	int range = luaL_checknumber(L, 2);
-	int seconds = luaL_checknumber(L, 3);
+	time_t seconds = (time_t) luaL_checknumber(L, 3);
+	int limit = luaL_checknumber(L, 4);
 	Server *server = getServer(L);
 	IRollbackManager *rollback = server->getRollbackManager();
-	v3s16 act_p;
-	int act_seconds = 0;
-	std::string actor = rollback->getLastNodeActor(p, range, seconds, &act_p, &act_seconds);
-	lua_pushstring(L, actor.c_str());
-	push_v3s16(L, act_p);
-	lua_pushnumber(L, act_seconds);
-	return 3;
+
+	std::list<RollbackAction> actions = rollback->getNodeActors(pos, range, seconds, limit);
+	std::list<RollbackAction>::iterator iter = actions.begin();
+
+	lua_createtable(L, actions.size(), 0);
+	for (unsigned int i = 1; iter != actions.end(); ++iter, ++i) {
+		lua_pushnumber(L, i); // Push index
+		lua_createtable(L, 0, 5); // Make a table with enough space pre-allocated
+
+		lua_pushstring(L, iter->actor.c_str());
+		lua_setfield(L, -2, "actor");
+
+		push_v3s16(L, iter->p);
+		lua_setfield(L, -2, "pos");
+
+		lua_pushnumber(L, iter->unix_time);
+		lua_setfield(L, -2, "time");
+
+		push_RollbackNode(L, iter->n_old);
+		lua_setfield(L, -2, "oldnode");
+
+		push_RollbackNode(L, iter->n_new);
+		lua_setfield(L, -2, "newnode");
+
+		lua_settable(L, -3); // Add action table to main table
+	}
+
+	return 1;
 }
 
 // rollback_revert_actions_by(actor, seconds) -> bool, log messages
@@ -53,28 +86,19 @@ int ModApiRollback::l_rollback_revert_actions_by(lua_State *L)
 	bool success = server->rollbackRevertActions(actions, &log);
 	// Push boolean result
 	lua_pushboolean(L, success);
-	// Get the table insert function and push the log table
-	lua_getglobal(L, "table");
-	lua_getfield(L, -1, "insert");
-	int table_insert = lua_gettop(L);
-	lua_newtable(L);
-	int table = lua_gettop(L);
-	for(std::list<std::string>::const_iterator i = log.begin();
-			i != log.end(); i++)
-	{
-		lua_pushvalue(L, table_insert);
-		lua_pushvalue(L, table);
-		lua_pushstring(L, i->c_str());
-		if(lua_pcall(L, 2, 0, 0))
-			script_error(L);
+	lua_createtable(L, log.size(), 0);
+	unsigned long i = 0;
+	for(std::list<std::string>::const_iterator iter = log.begin();
+			iter != log.end(); ++i, ++iter) {
+		lua_pushnumber(L, i);
+		lua_pushstring(L, iter->c_str());
+		lua_settable(L, -3);
 	}
-	lua_remove(L, -2); // Remove table
-	lua_remove(L, -2); // Remove insert
 	return 2;
 }
 
 void ModApiRollback::Initialize(lua_State *L, int top)
 {
-	API_FCT(rollback_get_last_node_actor);
+	API_FCT(rollback_get_node_actions);
 	API_FCT(rollback_revert_actions_by);
 }

src/script/lua_api/l_rollback.h

@@ -22,10 +22,11 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 
 #include "lua_api/l_base.h"
 
-class ModApiRollback : public ModApiBase {
+class ModApiRollback : public ModApiBase
+{
 private:
-	// rollback_get_last_node_actor(p, range, seconds) -> actor, p, seconds
-	static int l_rollback_get_last_node_actor(lua_State *L);
+	// rollback_get_node_actions(pos, range, seconds) -> {{actor, pos, time, oldnode, newnode}, ...}
+	static int l_rollback_get_node_actions(lua_State *L);
 
 	// rollback_revert_actions_by(actor, seconds) -> bool, log messages
 	static int l_rollback_revert_actions_by(lua_State *L);