ledger/src/py_journal.cc

/*
 * Copyright (c) 2003-2010, John Wiegley.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of New Artisans LLC nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <system.hh>

#include "pyinterp.h"
#include "pyutils.h"
#include "journal.h"
#include "xact.h"
#include "post.h"
#include "chain.h"
#include "filters.h"
#include "iterators.h"
#include "scope.h"
#include "report.h"

namespace ledger {

using namespace boost::python;

namespace {

  account_t& py_account_master(journal_t& journal) {
    return *journal.master;
  }

  long xacts_len(journal_t& journal)
  {
    return journal.xacts.size();
  }

  xact_t& xacts_getitem(journal_t& journal, long i)
  {
    static long last_index = 0;
    static journal_t * last_journal = NULL;
    static xacts_list::iterator elem;

    long len = journal.xacts.size();

    if (labs(i) >= len) {
      PyErr_SetString(PyExc_IndexError, _("Index out of range"));
      throw_error_already_set();
    }

    if (&journal == last_journal && i == last_index + 1) {
      last_index = i;
      return **++elem;
    }

    long x = i < 0 ? len + i : i;
    elem = journal.xacts.begin();
    while (--x >= 0)
      elem++;

    last_journal = &journal;
    last_index   = i;

    return **elem;
  }

  long accounts_len(account_t& account)
  {
    return account.accounts.size();
  }

  account_t& accounts_getitem(account_t& account, long i)
  {
    static long last_index = 0;
    static account_t * last_account = NULL;
    static accounts_map::iterator elem;

    long len = account.accounts.size();

    if (labs(i) >= len) {
      PyErr_SetString(PyExc_IndexError, _("Index out of range"));
      throw_error_already_set();
    }

    if (&account == last_account && i == last_index + 1) {
      last_index = i;
      return *(*++elem).second;
    }

    long x = i < 0 ? len + i : i;
    elem = account.accounts.begin();
    while (--x >= 0)
      elem++;

    last_account = &account;
    last_index   = i;

    return *(*elem).second;
  }

  account_t * py_find_account_1(journal_t& journal, const string& name)
  {
    return journal.find_account(name);
  }

  account_t * py_find_account_2(journal_t& journal, const string& name,
				const bool auto_create)
  {
    return journal.find_account(name, auto_create);
  }

  std::size_t py_read(journal_t& journal, const string& pathname)
  {
    return journal.read(pathname);
  }

  struct collector_wrapper
  {
    journal_t&	     journal;
    report_t         report;
    collect_posts *  posts_collector;
    post_handler_ptr chain;

    collector_wrapper(journal_t& _journal, report_t& base)
      : journal(_journal), report(base),
	posts_collector(new collect_posts) {}
    ~collector_wrapper() {
      journal.clear_xdata();
    }

    std::size_t length() const {
      return posts_collector->length();
    }

    std::vector<post_t *>::iterator begin() {
      return posts_collector->begin();
    }
    std::vector<post_t *>::iterator end() {
      return posts_collector->end();
    }
  };

  shared_ptr<collector_wrapper>
  py_collect(journal_t& journal, const string& query)
  {
    if (journal.has_xdata()) {
      PyErr_SetString(PyExc_RuntimeError,
		      _("Cannot have multiple journal collections open at once"));
      throw_error_already_set();
    }

    report_t& current_report(downcast<report_t>(*scope_t::default_scope));
    shared_ptr<collector_wrapper> coll(new collector_wrapper(journal,
							     current_report));
    std::auto_ptr<journal_t> save_journal
      (current_report.session.journal.release());
    current_report.session.journal.reset(&journal);

    try {
      strings_list remaining =
	process_arguments(split_arguments(query.c_str()), coll->report);
      coll->report.normalize_options("register");

      value_t args;
      foreach (const string& arg, remaining)
	args.push_back(string_value(arg));
      coll->report.parse_query_args(args, "@Journal.collect");

      journal_posts_iterator walker(coll->journal);
      coll->chain =
	chain_post_handlers(coll->report,
			    post_handler_ptr(coll->posts_collector));
      pass_down_posts(coll->chain, walker);
    }
    catch (...) {
      current_report.session.journal.release();
      current_report.session.journal.reset(save_journal.release());
      throw;
    }
    current_report.session.journal.release();
    current_report.session.journal.reset(save_journal.release());

    return coll;
  }

  post_t * posts_getitem(collector_wrapper& collector, long i)
  {
    post_t * post = collector.posts_collector->posts[i];
    std::cerr << typeid(post).name() << std::endl;
    std::cerr << typeid(*post).name() << std::endl;
    std::cerr << typeid(post->account).name() << std::endl;
    std::cerr << typeid(*post->account).name() << std::endl;
    return post;
  }

} // unnamed namespace

void export_journal()
{
  class_< item_handler<post_t>, shared_ptr<item_handler<post_t> >,
          boost::noncopyable >("PostHandler")
    ;

  class_< collect_posts, bases<item_handler<post_t> >,
          shared_ptr<collect_posts>, boost::noncopyable >("PostCollector")
    .def("__len__", &collect_posts::length)
    .def("__iter__", range<return_internal_reference<1,
	                     with_custodian_and_ward_postcall<1, 0> > >
	 (&collect_posts::begin, &collect_posts::end))
    ;

  class_< collector_wrapper, shared_ptr<collector_wrapper>,
          boost::noncopyable >("PostCollectorWrapper", no_init)
    .def("__len__", &collector_wrapper::length)
    .def("__getitem__", posts_getitem, return_internal_reference<1,
	                     with_custodian_and_ward_postcall<0, 1> >())
    .def("__iter__", range<return_value_policy<reference_existing_object,
	                     with_custodian_and_ward_postcall<0, 1> > >
	 (&collector_wrapper::begin, &collector_wrapper::end))
    ;

  class_< journal_t::fileinfo_t > ("FileInfo")
    .def(init<path>())

    .add_property("filename",
		  make_getter(&journal_t::fileinfo_t::filename),
		  make_setter(&journal_t::fileinfo_t::filename))
    .add_property("size",
		  make_getter(&journal_t::fileinfo_t::size),
		  make_setter(&journal_t::fileinfo_t::size))
    .add_property("modtime",
		  make_getter(&journal_t::fileinfo_t::modtime),
		  make_setter(&journal_t::fileinfo_t::modtime))
    .add_property("from_stream",
		  make_getter(&journal_t::fileinfo_t::from_stream),
		  make_setter(&journal_t::fileinfo_t::from_stream))
    ;

  class_< journal_t, boost::noncopyable > ("Journal")
    .def(init<path>())
    .def(init<string>())

    .add_property("master",
		  make_getter(&journal_t::master,
			      return_internal_reference<1,
			          with_custodian_and_ward_postcall<1, 0> >()))
    .add_property("bucket",
		  make_getter(&journal_t::bucket,
			      return_internal_reference<1,
			          with_custodian_and_ward_postcall<1, 0> >()),
		  make_setter(&journal_t::bucket))
    .add_property("was_loaded", make_getter(&journal_t::was_loaded))

    .def("add_account", &journal_t::add_account)
    .def("remove_account", &journal_t::remove_account)

    .def("find_account", py_find_account_1,
	 return_internal_reference<1,
	     with_custodian_and_ward_postcall<0, 1> >())
    .def("find_account", py_find_account_2,
	 return_internal_reference<1,
	     with_custodian_and_ward_postcall<0, 1> >())
    .def("find_account_re", &journal_t::find_account_re,
	 return_internal_reference<1,
	     with_custodian_and_ward_postcall<0, 1> >())

    .def("add_xact", &journal_t::add_xact)
    .def("remove_xact", &journal_t::remove_xact)

    .def("__len__", xacts_len)
#if 0
    .def("__getitem__", xacts_getitem,
	 return_internal_reference<1,
	     with_custodian_and_ward_postcall<0, 1> >())
#endif

    .def("__iter__", range<return_internal_reference<> >
	 (&journal_t::xacts_begin, &journal_t::xacts_end))
    .def("xacts", range<return_internal_reference<> >
	 (&journal_t::xacts_begin, &journal_t::xacts_end))
    .def("auto_xacts", range<return_internal_reference<> >
	 (&journal_t::auto_xacts_begin, &journal_t::auto_xacts_end))
    .def("period_xacts", range<return_internal_reference<> >
	 (&journal_t::period_xacts_begin, &journal_t::period_xacts_end))
    .def("sources", range<return_internal_reference<> >
	 (&journal_t::sources_begin, &journal_t::sources_end))

    .def("read", py_read)

    .def("has_xdata", &journal_t::has_xdata)
    .def("clear_xdata", &journal_t::clear_xdata)

    .def("collect", py_collect, with_custodian_and_ward_postcall<0, 1>())

    .def("valid", &journal_t::valid)
    ;
}

} // namespace ledger