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SearchManager.cpp

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/* 
 * Copyright (C) 2001-2005 Jacek Sieka, arnetheduck on gmail point com
 *
 * 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 2 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include "stdinc.h"
#include "DCPlusPlus.h"

#include "SearchManager.h"
#include "UploadManager.h"

#include "ClientManager.h"
#include "ShareManager.h"

SearchResult::SearchResult(Client* aClient, Types aType, int64_t aSize, const string& aFile, const TTHValue* aTTH, bool aUtf8) :
      file(aFile), hubName(aClient->getName()), hubIpPort(aClient->getIpPort()), user(aClient->getMe()), 
      size(aSize), type(aType), slots(SETTING(SLOTS)), freeSlots(UploadManager::getInstance()->getFreeSlots()),  
      tth(aTTH == NULL ? NULL : new TTHValue(*aTTH)), utf8(aUtf8), ref(1) { }

SearchResult::SearchResult(Types aType, int64_t aSize, const string& aFile, const TTHValue* aTTH) :
      file(aFile), size(aSize), type(aType), slots(SETTING(SLOTS)), freeSlots(UploadManager::getInstance()->getFreeSlots()),  
      tth(aTTH == NULL ? NULL : new TTHValue(*aTTH)), utf8(true), ref(1) { }

string SearchResult::toSR() const {
      // File:          "$SR %s %s%c%s %d/%d%c%s (%s)|"
      // Directory:     "$SR %s %s %d/%d%c%s (%s)|"
      string tmp;
      tmp.reserve(128);
      tmp.append("$SR ", 4);
      tmp.append(Text::utf8ToAcp(user->getNick()));
      tmp.append(1, ' ');
      string acpFile = utf8 ? Text::utf8ToAcp(file) : file;
      if(type == TYPE_FILE) {
            tmp.append(acpFile);
            tmp.append(1, '\x05');
            tmp.append(Util::toString(size));
      } else {
            tmp.append(acpFile, 0, acpFile.length() - 1);
      }
      tmp.append(1, ' ');
      tmp.append(Util::toString(freeSlots));
      tmp.append(1, '/');
      tmp.append(Util::toString(slots));
      tmp.append(1, '\x05');
      if(getTTH() == NULL) {
            tmp.append(Text::utf8ToAcp(hubName));
      } else {
            tmp.append("TTH:" + getTTH()->toBase32());
      }
      tmp.append(" (", 2);
      tmp.append(hubIpPort);
      tmp.append(")|", 2);
      return tmp;
}

AdcCommand SearchResult::toRES(char type) const {
      AdcCommand cmd(AdcCommand::CMD_RES, type);
      cmd.addParam("SI", Util::toString(size));
      cmd.addParam("SL", Util::toString(freeSlots));
      cmd.addParam("FN", Util::toAdcFile(utf8 ? file : Text::acpToUtf8(file)));
      if(getTTH() != NULL) {
            cmd.addParam("TR", getTTH()->toBase32());
      }
      return cmd;
}

void SearchManager::search(const string& aName, int64_t aSize, TypeModes aTypeMode /* = TYPE_ANY */, SizeModes aSizeMode /* = SIZE_ATLEAST */, const string& aToken /* = Util::emptyString */) {
      if(okToSearch()) {
            ClientManager::getInstance()->search(aSizeMode, aSize, aTypeMode, aName, aToken);
            lastSearch = GET_TICK();
      }
}

void SearchManager::search(StringList& who, const string& aName, int64_t aSize /* = 0 */, TypeModes aTypeMode /* = TYPE_ANY */, SizeModes aSizeMode /* = SIZE_ATLEAST */, const string& aToken /* = Util::emptyString */) {
      if(okToSearch()) {
            ClientManager::getInstance()->search(who, aSizeMode, aSize, aTypeMode, aName, aToken);
            lastSearch = GET_TICK();
      }
}

string SearchResult::getFileName() const { 
      if(getType() == TYPE_FILE) 
            return Util::getFileName(getFile()); 

      if(getFile().size() < 2)
            return getFile();

      string::size_type i = getFile().rfind('\\', getFile().length() - 2);
      if(i == string::npos)
            return getFile();

      return getFile().substr(i + 1);
}

void SearchManager::setPort(short aPort) throw(SocketException) {
      port = aPort;
      if(socket != NULL) {
            disconnect();
      } else {
            socket = new Socket();
      }

      socket->create(Socket::TYPE_UDP, true);
      socket->bind(aPort);
      start();
}

void SearchManager::disconnect() throw() {
      if(socket != NULL) {
            stop = true;
            socket->disconnect();
#ifdef _WIN32
            join();
#endif
            stop = false;
      }
}

#define BUFSIZE 8192
int SearchManager::run() {
      
      AutoArray<u_int8_t> buf(BUFSIZE);
      int len;

      while(true) {

            string remoteAddr;
            try {
                  while( (len = socket->read((u_int8_t*)buf, BUFSIZE, remoteAddr)) != 0) {
                        onData(buf, len, remoteAddr);
                  }
            } catch(const SocketException& e) {
                  dcdebug("SearchManager::run Error: %s\n", e.getError().c_str());
            }
            if(stop) {
                  return 0;
            }

            try {
                  socket->disconnect();
                  socket->create(Socket::TYPE_UDP, true);
                  socket->bind(port);
            } catch(const SocketException& e) {
                  // Oops, fatal this time...
                  dcdebug("SearchManager::run Stopped listening: %s\n", e.getError().c_str());
                  return 1;
            }
      }
      
      return 0;
}

void SearchManager::onData(const u_int8_t* buf, size_t aLen, const string& address) {
      string x((char*)buf, aLen);
      if(x.compare(0, 4, "$SR ") == 0) {
            string::size_type i, j;
            // Directories: $SR <nick><0x20><directory><0x20><free slots>/<total slots><0x05><Hubname><0x20>(<Hubip:port>)
            // Files:       $SR <nick><0x20><filename><0x05><filesize><0x20><free slots>/<total slots><0x05><Hubname><0x20>(<Hubip:port>)
            i = 4;
            if( (j = x.find(' ', i)) == string::npos) {
                  return;
            }
            string nick = Text::acpToUtf8(x.substr(i, j-i));
            i = j + 1;

            // A file has 2 0x05, a directory only one
            size_t cnt = count(x.begin() + j, x.end(), 0x05);
            
            SearchResult::Types type = SearchResult::TYPE_FILE;
            string file;
            int64_t size = 0;

            if(cnt == 1) {
                  // We have a directory...find the first space beyond the first 0x05 from the back 
                  // (dirs might contain spaces as well...clever protocol, eh?)
                  type = SearchResult::TYPE_DIRECTORY;
                  // Get past the hubname that might contain spaces
                  if((j = x.rfind(0x05)) == string::npos) {
                        return;
                  }
                  // Find the end of the directory info
                  if((j = x.rfind(' ', j-1)) == string::npos) {
                        return;
                  }
                  if(j < i + 1) {
                        return;
                  }
                  file = x.substr(i, j-i) + '\\';
            } else if(cnt == 2) {
                  if( (j = x.find((char)5, i)) == string::npos) {
                        return;
                  }
                  file = x.substr(i, j-i);
                  i = j + 1;
                  if( (j = x.find(' ', i)) == string::npos) {
                        return;
                  }
                  size = Util::toInt64(x.substr(i, j-i));
            }
            i = j + 1;
            
            if( (j = x.find('/', i)) == string::npos) {
                  return;
            }
            int freeSlots = Util::toInt(x.substr(i, j-i));
            i = j + 1;
            if( (j = x.find((char)5, i)) == string::npos) {
                  return;
            }
            int slots = Util::toInt(x.substr(i, j-i));
            i = j + 1;
            if( (j = x.rfind(" (")) == string::npos) {
                  return;
            }
            // the hub's name will get replaced later (with a UTF-8 version) if there's a TTH in the result
            string hubName = Text::acpToUtf8(x.substr(i, j-i));
            i = j + 2;
            if( (j = x.rfind(')')) == string::npos) {
                  return;
            }
            string hubIpPort = x.substr(i, j-i);
            User::Ptr user = ClientManager::getInstance()->getUser(nick, hubIpPort);

            SearchResult* sr = new SearchResult(user, type, slots, freeSlots, size,
                  file, hubName, hubIpPort, address, false);
            fire(SearchManagerListener::SR(), sr);
            sr->decRef();
      } else if(x.compare(1, 4, "RES ") == 0 && x[x.length() - 1] == 0x0a) {
            AdcCommand c(x.substr(0, x.length()-1));
            if(c.getParameters().empty())
                  return;

            User::Ptr p = ClientManager::getInstance()->getUser(c.getFrom(), false);
            if(!p)
                  return;

            int freeSlots = -1;
            int64_t size = -1;
            string name;

            for(StringIter i = c.getParameters().begin(); i != c.getParameters().end(); ++i) {
                  string& str = *i;
                  if(str.compare(0, 2, "FN") == 0) {
                        name = Util::toNmdcFile(str.substr(2));
                  } else if(str.compare(0, 2, "SL") == 0) {
                        freeSlots = Util::toInt(str.substr(2));
                  } else if(str.compare(0, 2, "SI") == 0) {
                        size = Util::toInt64(str.substr(2));
                  }
            }

            if(!name.empty() && freeSlots != -1 && size != -1) {
                  SearchResult::Types type = (name[name.length() - 1] == '\\' ? SearchResult::TYPE_DIRECTORY : SearchResult::TYPE_FILE);
                  SearchResult* sr = new SearchResult(p, type, p->getSlots(), freeSlots, size, name, p->getClientName(), "0.0.0.0", NULL, true);
                  fire(SearchManagerListener::SR(), sr);
                  sr->decRef();
            }
      } else if(x.compare(1, 4, "SCH ") == 0 && x[x.length() - 1] == 0x0a) {
            try {
                  respond(AdcCommand(x.substr(0, x.length()-1)));
            } catch(ParseException& ) {
            }
      }
}

void SearchManager::respond(const AdcCommand& adc) {
      // Filter own searches
      if(adc.getFrom().toBase32() == SETTING(CLIENT_ID))
            return;

      User::Ptr p = ClientManager::getInstance()->getUser(adc.getFrom(), false);
      if(!p)
            return;

      SearchResult::List results;
      ShareManager::getInstance()->search(results, adc.getParameters(), 10);

      string token;

      adc.getParam("TO", 0, token);

      if(results.empty())
            return;

      if(!p->getIp().empty() && p->getUDPPort() != 0) {
            Socket s;
            try {
                  s.create(Socket::TYPE_UDP);
                  for(SearchResult::Iter i = results.begin(); i != results.end(); ++i) {
                        if(token.empty())
                              s.writeTo(p->getIp(), p->getUDPPort(), (*i)->toRES(AdcCommand::TYPE_UDP).toString());
                        else
                              s.writeTo(p->getIp(), p->getUDPPort(), (*i)->toRES(AdcCommand::TYPE_UDP).addParam("TO", token).toString());
                        (*i)->decRef();
                  }
            } catch(const SocketException&) {
                  dcdebug("Search caught error\n");
            }
      } else {
            for(SearchResult::Iter i = results.begin(); i != results.end(); ++i) {
                  AdcCommand cmd = (*i)->toRES(AdcCommand::TYPE_DIRECT);
                  cmd.setTo(adc.getFrom());
                  if(!token.empty())
                        cmd.addParam("TO", token);
                  p->send(cmd.toString());
                  (*i)->decRef();
            }
      }
}

string SearchManager::clean(const string& aSearchString) {
      static const char* badChars = "$|.[]()-_+";
      string::size_type i = aSearchString.find_first_of(badChars);
      if(i == string::npos)
            return aSearchString;

      string tmp = aSearchString;
      // Remove all strange characters from the search string
      do {
            tmp[i] = ' ';
      } while ( (i = tmp.find_first_of(badChars, i)) != string::npos);

      return tmp;
}


/**
 * @file
 * $Id: SearchManager.cpp,v 1.2 2005/08/21 14:03:43 olof Exp $
 */


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