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 //
 // C++ Implementation: cCmdQueue
 //
 // Description: one command queue
 //
 /*
 Copyright 2005-2011 Tomas Mecir <kmuddy@kmuddy.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, see <http://www.gnu.org/licenses/>.
 */
 
 #include "ccmdqueue.h"
 
 #include "cactionmanager.h"
 #include "ccmdparser.h"
 #include "ccmdprocessor.h"
 #include "cmacromanager.h"
 #include "cpattern.h"
 #include "cvalue.h"
 
 
 cCmdQueue::cCmdQueue (int _sess) : sess(_sess)
 {
   parser = nullptr;
   preproc = nullptr;
 }
 
 cCmdQueue::~cCmdQueue()
 {
   deleteAllCommands ();
   deleteAllVariables ();
   std::map<QString, cExecStack *>::iterator it;
   for (it = stacks.begin(); it != stacks.end(); ++it)
     delete it->second;
   stacks.clear ();
   delete preproc;
 }
 
 void cCmdQueue::deleteAllCommands ()
 {
   if (!commands.empty()) {
     // delete the queue is needed
     std::list<cCmdQueueEntry *>::iterator it;
     for (it = commands.begin(); it != commands.end(); ++it)
       delete *it;
   }
   commands.clear ();
 }
 
 void cCmdQueue::fillFromPattern (const cPattern *p)
 {
   setValue ("prefix", p->getVariable ("prefix"));
   setValue ("suffix", p->getVariable ("suffix"));
   setValue ("prefixtrim", p->getVariable ("prefixtrim"));
   setValue ("suffixtrim", p->getVariable ("suffixtrim"));
   setValue ("matched", p->getVariable ("matched"));
   if (p->matching() == cPattern::regexp)
     for (int i = 0; i < p->getBackRefList().count(); ++i)
       setValue (QString::number (i), p->getBackRefList()[i]);
 }
 
 bool cCmdQueue::finished ()
 {
   return commands.empty();
 }
 
 bool cCmdQueue::waiting ()
 {
   // TODO: make the real thing, not just this stub !!!
   return false;
 }
 
 QString cCmdQueue::getValue (const QString &name)
 {
   QString vn = name;
   if (vn[0] == '$')
     vn = vn.mid(1);
   if (variables.count (vn))
     return variables[vn]->asString();
   return QString();
 }
 
 bool cCmdQueue::varExists (const QString &name)
 {
   QString vn = name;
   if (vn[0] == '$')
     vn = vn.mid(1);
   return (variables.count (vn) != 0);
 }
 
 cValue *cCmdQueue::value (const QString &name)
 {
   QString vn = name;
   if (vn[0] == '$')
     vn = vn.mid(1);
   if (variables.count (vn))
     return variables[vn];
   return nullptr;
 }
 
 void cCmdQueue::setValue (const QString &name, const QString &value)
 {
   QString vn = name;
   if (vn[0] == '$')
     vn = vn.mid(1);
   delValue (vn);
   cValue *val = new cValue (value);
   variables[vn] = val;
 }
 
 void cCmdQueue::setValue (const QString &name, const cValue &value)
 {
   QString vn = name;
   if (vn[0] == '$')
     vn = vn.mid(1);
   delValue (vn);
   cValue *val = new cValue (value);
   variables[vn] = val;
 }
 
 void cCmdQueue::delValue (const QString &name)
 {
   QString vn = name;
   if (vn[0] == '$')
     vn = vn.mid(1);
   if (!variables.count (vn)) return;
   delete variables[vn];
   variables.erase (vn);
 }
 
 void cCmdQueue::deleteAllVariables ()
 {
   std::map<QString, cValue *>::iterator it;
   for (it = variables.begin(); it != variables.end(); ++it)
     delete it->second;
   variables.clear ();
 }
 
 cExecStack *cCmdQueue::execStack (const QString &name)
 {
   if (!stacks.count (name))
     stacks[name] = new cExecStack;
   return stacks[name];
 }
 
 void cCmdQueue::addCommand (const QString &command, bool parsing, bool expandAliases)
 {
   if (!parser)
     parser = dynamic_cast<cCmdParser *>(cActionManager::self()->object ("cmdparser", sess));
   if (!parser) return;
   
   if (parsing && (parser->parsing())) {
     // split the text into individual commands
     QStringList cmds = parser->parse (command, expandAliases);
     QStringList::iterator it;
     for (it = cmds.begin(); it != cmds.end(); ++it) {
       bool raw = parser->mustSendRaw (*it);
       QString mname, mparams;
       if ((!raw) && parser->isMacroCall (*it, mname, mparams)) {
         cCmdQueueEntry *entry = new cCmdQueueEntry;
         entry->isMacro = true;
         entry->canParse = true;
         entry->macroName = mname;
         entry->macroParams = mparams;
         commands.push_back (entry);
       } else {
         cCmdQueueEntry *entry = new cCmdQueueEntry;
         entry->isMacro = false;
         entry->canParse = !raw;
         entry->command = raw ? parser->fixRaw (*it) : (*it);
         commands.push_back (entry);
       }
     }
   }
   else {
     cCmdQueueEntry *entry = new cCmdQueueEntry;
     entry->isMacro = false;
     entry->canParse = false;
     entry->command = command;
     commands.push_back (entry);
   }
 }
 
 void cCmdQueue::executeNext ()
 {
   if (finished()) return;
 
   cCmdQueueEntry *qe = commands.front();
   commands.pop_front();
   
   // call preprocessor commands on the entry
   bool ok = preprocess (qe);
   
   if (!ok) {
     // preprocessor command said, don't execute. So we won't.
     delete qe;
     return;
   }
   
   cActionManager *am = cActionManager::self();
   cCmdProcessor *cmdproc = dynamic_cast<cCmdProcessor *>(am->object ("cmdprocessor", sess));
   if (qe->isMacro)
     cmdproc->processMacro (qe->macroName, qe->macroParams, this);
   else {
     // send command; if we cannot parse, it gets sent directly without further parsing
     if (qe->canParse)
       cmdproc->processCommand (qe->command, this);
     else
       am->invokeEvent ("send-command", sess, qe->command);
   }
 
   delete qe;
 }
 
 void cCmdQueue::addPreprocessMacro (cMacro *macro)
 {
   if (hasPreprocessMacro (macro)) return;
   if (!preproc) preproc = new std::list<cMacro *>;
   preproc->push_back (macro);
 }
 
 void cCmdQueue::removePreprocessMacro (cMacro *macro)
 {
   if (!preproc) return;
   if (!hasPreprocessMacro (macro)) return;
   
   std::list<cMacro *>::iterator it;
   for (it = preproc->begin(); it != preproc->end(); ++it)
     if (*it == macro) {
       preproc->erase (it);
       return;
     }
 }
 
 bool cCmdQueue::hasPreprocessMacro (cMacro *macro)
 {
   if (!preproc) return false;
   std::list<cMacro *>::iterator it;
   for (it = preproc->begin(); it != preproc->end(); ++it)
     if (*it == macro)
       return true;
   return false;
 }
 
 bool cCmdQueue::preprocess (cCmdQueueEntry *qe)
 {
   if (!preproc) return true;
   
   bool ret = true;
   std::list<cMacro *>::iterator it;
   for (it = preproc->begin(); it != preproc->end(); ++it)
     if (!(*it)->preprocess (this, qe))
       ret = false;
   // If any preprocess command fails, we report failure. All preprocess commands get executed.
   return ret;
 }
 
 
 cExecStack::cExecStack ()
 {
 }
 
 cExecStack::~cExecStack ()
 {
   clear ();
 }
 
 void cExecStack::push (const cExecStackItem &item)
 {
   stack.push_back (item);
 }
 
 cExecStackItem cExecStack::pop ()
 {
   cExecStackItem item = top();
   stack.pop_back ();
   return item;
 }
 
 cExecStackItem cExecStack::top ()
 {
   return stack.back();
 }
 
 bool cExecStack::empty ()
 {
   return stack.empty();
 }
 
 void cExecStack::clear ()
 {
   stack.clear ();
 }
 
 cExecStackItem::cExecStackItem ()
 {
 }
 
 cExecStackItem::~cExecStackItem ()
 {
   attribs.clear ();
 }
 
 int cExecStackItem::attrib (const QString &name)
 {
   if (attribs.count (name))
     return attribs[name];
   return 0;
 }
 
 void cExecStackItem::setAttrib (const QString &name, int val)
 {
   if ((val == 0) && (attribs.count (name)))
     attribs.erase (name);
   attribs[name] = val;
 }