// -*- mode: cpp; mode: fold -*-
// Description								/*{{{*/
/* #####################################################################
   apt-mark - show and change auto-installed bit information
   ##################################################################### */
									/*}}}*/
// Include Files							/*{{{*/
#include <config.h>

#include <apt-pkg/cachefile.h>
#include <apt-pkg/cacheset.h>
#include <apt-pkg/cmndline.h>
#include <apt-pkg/error.h>
#include <apt-pkg/fileutl.h>
#include <apt-pkg/init.h>
#include <apt-pkg/pkgsystem.h>
#include <apt-pkg/strutl.h>
#include <apt-pkg/statechanges.h>
#include <apt-pkg/cacheiterators.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/depcache.h>
#include <apt-pkg/macros.h>
#include <apt-pkg/pkgcache.h>

#include <apt-private/private-cmndline.h>
#include <apt-private/private-output.h>
#include <apt-private/private-main.h>

#include <errno.h>
#include <fcntl.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/wait.h>
#include <unistd.h>
#include <algorithm>
#include <fstream>
#include <iostream>
#include <string>
#include <vector>

#include <apti18n.h>
									/*}}}*/
using namespace std;

/* DoAuto - mark packages as automatically/manually installed		{{{*/
static bool DoAuto(CommandLine &CmdL)
{
   pkgCacheFile CacheFile;
   pkgCache *Cache = CacheFile.GetPkgCache();
   pkgDepCache *DepCache = CacheFile.GetDepCache();
   if (unlikely(Cache == NULL || DepCache == NULL))
      return false;

   APT::PackageList pkgset = APT::PackageList::FromCommandLine(CacheFile, CmdL.FileList + 1);
   if (pkgset.empty() == true)
      return _error->Error(_("No packages found"));

   bool MarkAuto = strcasecmp(CmdL.FileList[0],"auto") == 0;
   int AutoMarkChanged = 0;

   for (APT::PackageList::const_iterator Pkg = pkgset.begin(); Pkg != pkgset.end(); ++Pkg)
   {
      if (Pkg->CurrentVer == 0)
      {
	 ioprintf(c1out,_("%s can not be marked as it is not installed.\n"), Pkg.FullName(true).c_str());
	 continue;
      }
      else if ((((*DepCache)[Pkg].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto) == MarkAuto)
      {
	 if (MarkAuto == false)
	    ioprintf(c1out,_("%s was already set to manually installed.\n"), Pkg.FullName(true).c_str());
	 else
	    ioprintf(c1out,_("%s was already set to automatically installed.\n"), Pkg.FullName(true).c_str());
	 continue;
      }

      if (MarkAuto == false)
	 ioprintf(c1out,_("%s set to manually installed.\n"), Pkg.FullName(true).c_str());
      else
	 ioprintf(c1out,_("%s set to automatically installed.\n"), Pkg.FullName(true).c_str());

      DepCache->MarkAuto(Pkg, MarkAuto);
      ++AutoMarkChanged;
   }
   if (AutoMarkChanged > 0 && _config->FindB("APT::Mark::Simulate", false) == false)
      return DepCache->writeStateFile(NULL);
   return true;
}
									/*}}}*/
/* DoMarkAuto - mark packages as automatically/manually installed	{{{*/
/* Does the same as DoAuto but tries to do it exactly the same why as
   the python implementation did it so it can be a drop-in replacement */
static bool DoMarkAuto(CommandLine &CmdL)
{
   pkgCacheFile CacheFile;
   pkgCache *Cache = CacheFile.GetPkgCache();
   pkgDepCache *DepCache = CacheFile.GetDepCache();
   if (unlikely(Cache == NULL || DepCache == NULL))
      return false;

   APT::PackageList pkgset = APT::PackageList::FromCommandLine(CacheFile, CmdL.FileList + 1);
   if (pkgset.empty() == true)
      return _error->Error(_("No packages found"));

   bool const MarkAuto = strcasecmp(CmdL.FileList[0],"markauto") == 0;
   bool const Verbose = _config->FindB("APT::MarkAuto::Verbose", false);
   int AutoMarkChanged = 0;

   for (APT::PackageList::const_iterator Pkg = pkgset.begin(); Pkg != pkgset.end(); ++Pkg)
   {
      if (Pkg->CurrentVer == 0 ||
	  (((*DepCache)[Pkg].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto) == MarkAuto)
	 continue;

      if (Verbose == true)
	 ioprintf(c1out, "changing %s to %d\n", Pkg.Name(), (MarkAuto == false) ? 0 : 1);

      DepCache->MarkAuto(Pkg, MarkAuto);
      ++AutoMarkChanged;
   }
   if (AutoMarkChanged > 0 && _config->FindB("APT::Mark::Simulate", false) == false)
      return DepCache->writeStateFile(NULL);

   _error->Notice(_("This command is deprecated. Please use 'apt-mark auto' and 'apt-mark manual' instead."));

   return true;
}
									/*}}}*/
/* ShowAuto - show automatically installed packages (sorted)		{{{*/
static bool ShowAuto(CommandLine &CmdL)
{
   pkgCacheFile CacheFile;
   pkgCache *Cache = CacheFile.GetPkgCache();
   pkgDepCache *DepCache = CacheFile.GetDepCache();
   if (unlikely(Cache == NULL || DepCache == NULL))
      return false;

   std::vector<string> packages;

   bool const ShowAuto = strcasecmp(CmdL.FileList[0],"showauto") == 0;

   if (CmdL.FileList[1] == 0)
   {
      packages.reserve(Cache->HeaderP->PackageCount / 3);
      for (pkgCache::PkgIterator P = Cache->PkgBegin(); P.end() == false; ++P)
	 if (P->CurrentVer != 0 &&
	     (((*DepCache)[P].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto) == ShowAuto)
	    packages.push_back(P.FullName(true));
   }
   else
   {
      APT::CacheSetHelper helper(false); // do not show errors
      APT::PackageSet pkgset = APT::PackageSet::FromCommandLine(CacheFile, CmdL.FileList + 1, helper);
      packages.reserve(pkgset.size());
      for (APT::PackageSet::const_iterator P = pkgset.begin(); P != pkgset.end(); ++P)
	 if (P->CurrentVer != 0 &&
	     (((*DepCache)[P].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto) == ShowAuto)
	    packages.push_back(P.FullName(true));
   }

   std::sort(packages.begin(), packages.end());

   for (vector<string>::const_iterator I = packages.begin(); I != packages.end(); ++I)
      std::cout << *I << std::endl;

   return true;
}
									/*}}}*/
// DoSelection - wrapping around dpkg selections			/*{{{*/
static bool DoSelection(CommandLine &CmdL)
{
   pkgCacheFile CacheFile;
   pkgCache *Cache = CacheFile.GetPkgCache();
   if (unlikely(Cache == NULL))
      return false;

   APT::VersionVector pkgset = APT::VersionVector::FromCommandLine(CacheFile, CmdL.FileList + 1, APT::CacheSetHelper::INSTCAND);
   if (pkgset.empty() == true)
      return _error->Error(_("No packages found"));

   APT::StateChanges marks;
   if (strcasecmp(CmdL.FileList[0], "hold") == 0 || strcasecmp(CmdL.FileList[0], "unhold") == 0)
   {
      auto const part = std::stable_partition(pkgset.begin(), pkgset.end(),
	    [](pkgCache::VerIterator const &V) { return V.ParentPkg()->SelectedState == pkgCache::State::Hold; });

      bool const MarkHold = strcasecmp(CmdL.FileList[0],"hold") == 0;
      auto const doneBegin = MarkHold ? pkgset.begin() : part;
      auto const doneEnd = MarkHold ? part : pkgset.end();
      std::for_each(doneBegin, doneEnd, [&MarkHold](pkgCache::VerIterator const &V) {
	    if (MarkHold == true)
	    ioprintf(c1out, _("%s was already set on hold.\n"), V.ParentPkg().FullName(true).c_str());
	    else
	    ioprintf(c1out, _("%s was already not hold.\n"), V.ParentPkg().FullName(true).c_str());
	    });

      if (doneBegin == pkgset.begin() && doneEnd == pkgset.end())
	 return true;

      auto const changeBegin = MarkHold ? part : pkgset.begin();
      auto const changeEnd = MarkHold ? pkgset.end() : part;
      std::move(changeBegin, changeEnd, std::back_inserter(MarkHold ? marks.Hold() : marks.Unhold()));
   }
   else
   {
      // FIXME: Maybe show a message for unchanged states here as well?
      if (strcasecmp(CmdL.FileList[0], "purge") == 0)
	 std::swap(marks.Purge(), pkgset);
      else if (strcasecmp(CmdL.FileList[0], "deinstall") == 0 || strcasecmp(CmdL.FileList[0], "remove") == 0)
	 std::swap(marks.Remove(), pkgset);
      else //if (strcasecmp(CmdL.FileList[0], "install") == 0)
	 std::swap(marks.Install(), pkgset);
   }
   pkgset.clear();

   bool success = true;
   if (_config->FindB("APT::Mark::Simulate", false) == false)
   {
      success = marks.Save();
      if (success == false)
	 _error->Error(_("Executing dpkg failed. Are you root?"));
   }
   for (auto Ver : marks.Hold())
      ioprintf(c1out,_("%s set on hold.\n"), Ver.ParentPkg().FullName(true).c_str());
   for (auto Ver : marks.Unhold())
      ioprintf(c1out,_("Canceled hold on %s.\n"), Ver.ParentPkg().FullName(true).c_str());
   for (auto Ver : marks.Purge())
      ioprintf(c1out,_("Selected %s for purge.\n"), Ver.ParentPkg().FullName(true).c_str());
   for (auto Ver : marks.Remove())
      ioprintf(c1out,_("Selected %s for removal.\n"), Ver.ParentPkg().FullName(true).c_str());
   for (auto Ver : marks.Install())
      ioprintf(c1out,_("Selected %s for installation.\n"), Ver.ParentPkg().FullName(true).c_str());
   return success;
}
									/*}}}*/
static bool ShowSelection(CommandLine &CmdL)				/*{{{*/
{
   pkgCacheFile CacheFile;
   pkgCache *Cache = CacheFile.GetPkgCache();
   if (unlikely(Cache == NULL))
      return false;

   pkgCache::State::PkgSelectedState selector;
   if (strncasecmp(CmdL.FileList[0], "showpurge", strlen("showpurge")) == 0)
      selector = pkgCache::State::Purge;
   else if (strncasecmp(CmdL.FileList[0], "showdeinstall", strlen("showdeinstall")) == 0 ||
	 strncasecmp(CmdL.FileList[0], "showremove", strlen("showremove")) == 0)
      selector = pkgCache::State::DeInstall;
   else if (strncasecmp(CmdL.FileList[0], "showhold", strlen("showhold")) == 0)
      selector = pkgCache::State::Hold;
   else //if (strcasecmp(CmdL.FileList[0], "showinstall", strlen("showinstall")) == 0)
      selector = pkgCache::State::Install;

   std::vector<string> packages;

   if (CmdL.FileList[1] == 0)
   {
      packages.reserve(50); // how many holds are realistic? I hope just a few…
      for (pkgCache::PkgIterator P = Cache->PkgBegin(); P.end() == false; ++P)
	 if (P->SelectedState == selector)
	    packages.push_back(P.FullName(true));
   }
   else
   {
      APT::CacheSetHelper helper(false); // do not show errors
      APT::PackageSet pkgset = APT::PackageSet::FromCommandLine(CacheFile, CmdL.FileList + 1, helper);
      packages.reserve(pkgset.size());
      for (APT::PackageSet::const_iterator P = pkgset.begin(); P != pkgset.end(); ++P)
	 if (P->SelectedState == selector)
	    packages.push_back(P.FullName(true));
   }

   std::sort(packages.begin(), packages.end());

   for (vector<string>::const_iterator I = packages.begin(); I != packages.end(); ++I)
      std::cout << *I << std::endl;

   return true;
}
									/*}}}*/
// ShowHelp - Show a help screen					/*{{{*/
bool ShowHelp(CommandLine &, CommandLine::DispatchWithHelp const * Cmds)
{
   ioprintf(std::cout, "%s %s (%s)\n", PACKAGE, PACKAGE_VERSION, COMMON_ARCH);

   std::cout <<
    _("Usage: apt-mark [options] {auto|manual} pkg1 [pkg2 ...]\n"
      "\n"
      "apt-mark is a simple command line interface for marking packages\n"
      "as manually or automatically installed. It can also list marks.\n")
    << std::endl
    << _("Commands:") << std::endl;

   for (; Cmds->Handler != nullptr; ++Cmds)
   {
      if (Cmds->Help == nullptr)
	 continue;
      std::cout << "   " << Cmds->Match << " - " << Cmds->Help << std::endl;
   }

   std::cout << std::endl
   << _("Options:\n"
      "  -h  This help text.\n"
      "  -q  Loggable output - no progress indicator\n"
      "  -qq No output except for errors\n"
      "  -s  No-act. Just prints what would be done.\n"
      "  -f  read/write auto/manual marking in the given file\n"
      "  -c=? Read this configuration file\n"
      "  -o=? Set an arbitrary configuration option, eg -o dir::cache=/tmp\n"
      "See the apt-mark(8) and apt.conf(5) manual pages for more information.")
      << std::endl;
   return true;
}
									/*}}}*/
std::vector<CommandLine::DispatchWithHelp> GetCommands()		/*{{{*/
{
   return {
      {"auto",&DoAuto, _("Mark the given packages as automatically installed")},
      {"manual",&DoAuto, _("Mark the given packages as manually installed")},
      {"hold",&DoSelection, _("Mark a package as held back")},
      {"unhold",&DoSelection, _("Unset a package set as held back")},
      {"install",&DoSelection, nullptr},
      {"remove",&DoSelection, nullptr}, // dpkg uses deinstall, but we use remove everywhere else
      {"deinstall",&DoSelection, nullptr},
      {"purge",&DoSelection, nullptr},
      {"showauto",&ShowAuto, _("Print the list of automatically installed packages")},
      {"showmanual",&ShowAuto, _("Print the list of manually installed packages")},
      {"showhold",&ShowSelection, _("Print the list of package on hold")}, {"showholds",&ShowSelection, nullptr},
      {"showinstall",&ShowSelection, nullptr}, {"showinstalls",&ShowSelection, nullptr},
      {"showdeinstall",&ShowSelection, nullptr}, {"showdeinstalls",&ShowSelection, nullptr},
      {"showremove",&ShowSelection, nullptr}, {"showremoves",&ShowSelection, nullptr},
      {"showpurge",&ShowSelection, nullptr}, {"showpurges",&ShowSelection, nullptr},
      // obsolete commands for compatibility
      {"markauto", &DoMarkAuto, nullptr},
      {"unmarkauto", &DoMarkAuto, nullptr},
      {nullptr, nullptr, nullptr}
   };
}
									/*}}}*/
int main(int argc,const char *argv[])					/*{{{*/
{
   InitLocale();

   CommandLine CmdL;
   auto const Cmds = ParseCommandLine(CmdL, APT_CMD::APT_MARK, &_config, &_system, argc, argv);

   InitOutput();

   return DispatchCommandLine(CmdL, Cmds);
}
									/*}}}*/