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/*
* CommandParser.cpp
*
* Copyright (C) 2008 Matthias Schiffer <matthias@gamezock.de>
*
* This program 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, either version 3 of the License, or
* (at your option) any later version.
*
* 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 "CommandParser.h"
#include "Request/CoreStatusRequest.h"
#include <Common/Request/DisconnectRequest.h>
#include <iostream>
#include <cstdio>
namespace Mad {
namespace Client {
const CommandParser::Command CommandParser::commands[] = {
{{"help", "?", 0}, "help [command]", "Displays usage information about commands", "Displays usage information about a command. If no command is given, a list of all available commands is displayed.", &CommandParser::helpCommand},
{{"status", "st", 0}, "status", "Displays server status information", "Displays server status information.", &CommandParser::statusCommand},
{{"exit", "quit", 0}, "exit", "Closes the connection and quits the client", "Closes the connection and quits the client.", &CommandParser::exitCommand},
{{0}, 0, 0, 0, 0}
};
const CommandParser::Command* CommandParser::findCommand(const std::string& command) {
for(int i = 0; commands[i].commands[0] != 0; ++i) {
for(int j = 0; commands[i].commands[j] != 0; ++j) {
if(command == commands[i].commands[j]) {
return &commands[i];
}
}
}
return 0;
}
void CommandParser::printUsage(const std::string& command) {
const CommandParser::Command *cmd = findCommand(command);
if(cmd)
std::cerr << "Usage: " << cmd->cmdline << std::endl;
}
void CommandParser::helpCommand(const std::vector<std::string> &args) {
if(args.size() == 1) {
std::cout << "Available commands:" << std::endl << std::endl;
for(int i = 0; commands[i].commands[0] != 0; ++i) {
std::cout << commands[i].commands[0];
for(int j = 1; commands[i].commands[j] != 0; ++j)
std::cout << ", " << commands[i].commands[j];
std::cout << std::endl << "\t" << commands[i].desc << std::endl;
}
}
else if(args.size() == 2) {
const Command* command = findCommand(args[1]);
if(command) {
std::cout << "Usage: " << command->cmdline << std::endl << std::endl;
std::cout << command->longdesc << std::endl;
}
else
std::cerr << args[0] << ": Command '" << args[1] << "' doesn't exist." << std::endl;
}
else {
std::cerr << args[0] << ": Too many arguments." << std::endl;
printUsage("help");
}
}
void CommandParser::statusCommand(const std::vector<std::string>&) {
activeRequests++;
Request::CoreStatusRequest::send(connection, *requestManager, sigc::mem_fun(this, &CommandParser::coreStatusRequestFinished));
}
void CommandParser::exitCommand(const std::vector<std::string>&) {
activeRequests++;
disconnect = true;
Common::Request::DisconnectRequest::send(connection, *requestManager, sigc::mem_fun(this, &CommandParser::requestFinished));
}
void CommandParser::coreStatusRequestFinished(const Net::Packets::HostStatusPacket &packet) {
std::cout << "Server status:" << std::endl;
if(packet.getUptime()) {
unsigned long days = packet.getUptime()/86400;
unsigned long hours = (packet.getUptime()%86400)/3600;
unsigned long minutes = (packet.getUptime()%3600)/60;
std::printf("\tUptime:\t\t");
if(days) std::printf("%lu days ", days);
std::printf("%lu:%02lu", hours, minutes);
if(packet.getIdleTime())
std::printf(" (load average: %.1f%%)", 100.0f-(packet.getIdleTime()*100.0f/packet.getUptime()));
std::printf("\n\n");
}
if(packet.getTotalMem() && packet.getFreeMem()) {
const std::string units[] = {
"kB", "MB", "GB", "TB", ""
};
unsigned unit = 0;
float totalMem = packet.getTotalMem(), usedMem = packet.getTotalMem()-packet.getFreeMem();
while(totalMem >= 1024 && !units[unit+1].empty()) {
++unit;
totalMem /= 1024;
usedMem /= 1024;
}
std::printf("\tMemory usage:\t%.*f/%.*f %s", (usedMem < 10) ? 2 : 1, usedMem, (totalMem < 10) ? 2 : 1, totalMem, units[unit].c_str());
std::printf(" (%.1f%%)\n", usedMem*100.0f/totalMem);
if(packet.getTotalSwap() && packet.getFreeSwap()) {
unit = 0;
totalMem = packet.getTotalSwap(); usedMem = packet.getTotalSwap()-packet.getFreeSwap();
while(totalMem >= 1024 && !units[unit+1].empty()) {
++unit;
totalMem /= 1024;
usedMem /= 1024;
}
std::printf("\tSwap usage:\t%.*f/%.*f %s", (usedMem < 10) ? 2 : 1, usedMem, (totalMem < 10) ? 2 : 1, totalMem, units[unit].c_str());
std::printf(" (%.1f%%)\n", usedMem*100.0f/totalMem);
}
std::printf("\n");
}
requestFinished();
}
bool CommandParser::split(const std::string &str, std::vector<std::string> &ret) {
std::string temp;
bool quoteSingle = false, quoteDouble = false, escape = false;
size_t beg = 0;
for(size_t cur = 0; cur < str.length(); ++cur) {
if(!escape) {
if(str[cur] == ' ' && !quoteSingle && !quoteDouble) {
if(cur == beg && temp.empty()) {
++beg;
}
else {
temp += str.substr(beg, cur-beg);
ret.push_back(temp);
temp.clear();
beg = cur+1;
}
continue;
}
if(str[cur] == '"' && !quoteSingle) {
temp += str.substr(beg, cur-beg);
beg = cur+1;
quoteDouble = !quoteDouble;
continue;
}
if(str[cur] == '\'' && !quoteDouble) {
temp += str.substr(beg, cur-beg);
beg = cur+1;
quoteSingle = !quoteSingle;
continue;
}
if(str[cur] == '\\') {
escape = true;
continue;
}
}
if(escape && ((!quoteSingle && !quoteDouble) || (quoteSingle && str[cur] == '\'') || (quoteDouble && (str[cur] == '"' || str[cur] == '\\')))) {
temp += str.substr(beg, cur-beg-1);
beg = cur;
}
escape = false;
}
temp += str.substr(beg, std::string::npos);
ret.push_back(temp);
return true;
}
bool CommandParser::parse(const std::string &cmd) {
std::vector<std::string> splitCmd;
split(cmd, splitCmd);
if(splitCmd.empty())
return true;
const Command* command = findCommand(splitCmd[0]);
if(command)
(this->*command->funcPtr)(splitCmd);
else
std::cerr << "Unknown command '" << splitCmd[0] << "'." << std::endl;
return true;
}
}
}
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