/*
 * module.C: Module management.
 *
 * Copyright © 2007 Pippijn van Steenhoven / The Ermyth Team
 * Rights to this code are as documented in COPYING.
 */
#include <svsconfig.h>
#include <common.h>
#include <ermyth/module.h>

modules::modules (impl::srcinf const &si, char const * const name, bool norestart, bool (*init)(module *), void (*fini)(),
        char const * const vendor, char const * const modversion)
{
  if (provides (name))
    throw module_exception (si, "Trying to register two modules with the same name: %s", name);
  module *mod = new module (name, norestart, init, fini, vendor, modversion);
  modlist ().push_back (mod);
  provides (name);
}

bool
modules::provides (char const * const name)
{
  if (find (name) != NULL)
    return true;
  return false;
}

fault::code
modules::enable (char const * const name)
{
  module *m = find (name);

  if (!m)
    return fault::nosuch_target;
  
  if (m->enabled)
    return fault::nochange;

  m->enabled = m->init (m);

  return m->enabled ? fault::ok : fault::failed;
}

fault::code
modules::disable (char const * const name)
{
  module *m = find (name);

  if (!m)
    return fault::nosuch_target;

  if (m->norestart)
    return fault::noprivs;

  if (m->enabled)
    m->fini ();
  else
    return fault::nochange;

  m->enabled = false;

  return fault::ok;
}

module *
modules::find (char const * const name)
{
  foreach (module *m, modlist ())
    if (!strcmp (m->name, name))
      return m;

  return NULL;
}

void
modules::cleanup ()
{
  while (!modlist ().empty ())
    {
      module *m = modlist ().back ();

      if (m->enabled)
        m->fini ();
      delete m;

      modlist ().pop_back ();
    }
}