summaryrefslogtreecommitdiff
path: root/src/modules/m_spanningtree/override_map.cpp
blob: b5da112806d0b5c347627c468bf4a525ed43e8b2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
/*
 * InspIRCd -- Internet Relay Chat Daemon
 *
 *   Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
 *   Copyright (C) 2007-2008 Craig Edwards <craigedwards@brainbox.cc>
 *   Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
 *
 * This file is part of InspIRCd.  InspIRCd is free software: you can
 * redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation, version 2.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */


#include "inspircd.h"

#include "main.h"
#include "utils.h"
#include "treeserver.h"
#include "commands.h"

CommandMap::CommandMap(Module* Creator)
	: Command(Creator, "MAP", 0, 1)
{
	Penalty = 2;
}

std::string CommandMap::MapOperInfo(TreeServer* Current)
{
	time_t secs_up = ServerInstance->Time() - Current->age;
	return " [Up: " + ModuleSpanningTree::TimeToStr(secs_up) + (Current->rtt == 0 ? "]" : " Lag: " + ConvToStr(Current->rtt) + "ms]");
}

void CommandMap::ShowMap(TreeServer* Current, User* user, int depth, int &line, char* names, int &maxnamew, char* stats)
{
	ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "ShowMap depth %d on line %d", depth, line);
	float percent;

	if (ServerInstance->Users->clientlist->size() == 0)
	{
		// If there are no users, WHO THE HELL DID THE /MAP?!?!?!
		percent = 0;
	}
	else
	{
		percent = Current->UserCount * 100.0 / ServerInstance->Users->clientlist->size();
	}

	const std::string operdata = user->IsOper() ? MapOperInfo(Current) : "";

	char* myname = names + 100 * line;
	char* mystat = stats + 50 * line;
	memset(myname, ' ', depth);
	int w = depth;

	if (user->IsOper())
	{
		w += snprintf(myname + depth, 99 - depth, "%s (%s)", Current->GetName().c_str(), Current->GetID().c_str());
	}
	else
	{
		w += snprintf(myname + depth, 99 - depth, "%s", Current->GetName().c_str());
	}
	memset(myname + w, ' ', 100 - w);
	if (w > maxnamew)
		maxnamew = w;
	snprintf(mystat, 49, "%5d [%5.2f%%]%s", Current->UserCount, percent, operdata.c_str());

	line++;

	if (user->IsOper() || !Utils->FlatLinks)
		depth = depth + 2;

	const TreeServer::ChildServers& servers = Current->GetChildren();
	for (TreeServer::ChildServers::const_iterator i = servers.begin(); i != servers.end(); ++i)
	{
		TreeServer* child = *i;
		if (!user->IsOper()) {
			if (child->Hidden)
				continue;
			if ((Utils->HideULines) && (ServerInstance->ULine(child->GetName())))
				continue;
		}
		ShowMap(child, user, depth, line, names, maxnamew, stats);
	}
}


// Ok, prepare to be confused.
// After much mulling over how to approach this, it struck me that
// the 'usual' way of doing a /MAP isnt the best way. Instead of
// keeping track of a ton of ascii characters, and line by line
// under recursion working out where to place them using multiplications
// and divisons, we instead render the map onto a backplane of characters
// (a character matrix), then draw the branches as a series of "L" shapes
// from the nodes. This is not only friendlier on CPU it uses less stack.
CmdResult CommandMap::Handle(const std::vector<std::string>& parameters, User* user)
{
	if (parameters.size() > 0)
	{
		/* Remote MAP, the server is within the 1st parameter */
		TreeServer* s = Utils->FindServerMask(parameters[0]);
		if (!s)
		{
			user->WriteNumeric(ERR_NOSUCHSERVER, "%s %s :No such server", user->nick.c_str(), parameters[0].c_str());
			return CMD_FAILURE;
		}

		if (!s->IsRoot())
			return CMD_SUCCESS;
	}

	// These arrays represent a virtual screen which we will
	// "scratch" draw to, as the console device of an irc
	// client does not provide for a proper terminal.
	int totusers = ServerInstance->Users->clientlist->size();
	int totservers = Utils->serverlist.size();
	int maxnamew = 0;
	int line = 0;
	char* names = new char[totservers * 100];
	char* stats = new char[totservers * 50];

	// The only recursive bit is called here.
	ShowMap(Utils->TreeRoot,user,0,line,names,maxnamew,stats);

	// Process each line one by one.
	for (int l = 1; l < line; l++)
	{
		char* myname = names + 100 * l;
		// scan across the line looking for the start of the
		// servername (the recursive part of the algorithm has placed
		// the servers at indented positions depending on what they
		// are related to)
		int first_nonspace = 0;

		while (myname[first_nonspace] == ' ')
		{
			first_nonspace++;
		}

		first_nonspace--;

		// Draw the `- (corner) section: this may be overwritten by
		// another L shape passing along the same vertical pane, becoming
		// a |- (branch) section instead.

		myname[first_nonspace] = '-';
		myname[first_nonspace-1] = '`';
		int l2 = l - 1;

		// Draw upwards until we hit the parent server, causing possibly
		// other corners (`-) to become branches (|-)
		while ((names[l2 * 100 + first_nonspace-1] == ' ') || (names[l2 * 100 + first_nonspace-1] == '`'))
		{
			names[l2 * 100 + first_nonspace-1] = '|';
			l2--;
		}
	}

	float avg_users = totusers * 1.0 / line;

	for (int t = 0; t < line; t++)
	{
		// terminate the string at maxnamew characters
		names[100 * t + maxnamew] = '\0';
		user->SendText(":%s %03d %s :%s %s", ServerInstance->Config->ServerName.c_str(),
			RPL_MAP, user->nick.c_str(), names + 100 * t, stats + 50 * t);
	}
	user->SendText(":%s %03d %s :%d server%s and %d user%s, average %.2f users per server",
		ServerInstance->Config->ServerName.c_str(), RPL_MAPUSERS, user->nick.c_str(),
		line, (line > 1 ? "s" : ""), totusers, (totusers > 1 ? "s" : ""), avg_users);
	user->SendText(":%s %03d %s :End of /MAP", ServerInstance->Config->ServerName.c_str(),
		RPL_ENDMAP, user->nick.c_str());

	delete[] names;
	delete[] stats;

	return CMD_SUCCESS;
}

RouteDescriptor CommandMap::GetRouting(User* user, const std::vector<std::string>& parameters)
{
	if (!parameters.empty())
		return ROUTE_UNICAST(parameters[0]);
	return ROUTE_LOCALONLY;
}