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path: root/src/sugar/feedback.py
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# Copyright (C) 2011, Aleksey Lim
#
# 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/>.

import os
import sys
import atexit
import logging

import dbus
import cjson


_SHELL_SERVICE = "org.laptop.Shell"
_SHELL_PATH = "/org/laptop/Shell"
_SHELL_IFACE = "org.laptop.Shell"

_report = {}
_need_log = False
_log_formatter = None


def start(activity_id, log_path=None):
    if log_path is None:
        # TODO more portable solution
        stdout_file = os.readlink('/proc/self/fd/%s' % sys.stdout.fileno())
        if os.path.isfile(stdout_file):
            log_path = stdout_file
        else:
            log_path = ''

    atexit.register(_send, activity_id, log_path)


def trigger(key, need_log=False):
    global _need_log

    if key not in _report:
        _report[key] = 0
    _report[key] += 1
    _need_log = _need_log or need_log

    logging.debug('Feedback[%s] == %s', key, _report[key])


def flush():
    global _report
    global _need_log

    report = _report
    need_log = _need_log
    _report = {}
    _need_log = False

    return report, need_log


def _send(activity_id, log_path):
    if not _report:
        return

    report, need_log = flush()

    bus = dbus.SessionBus()
    bus_object = bus.get_object(_SHELL_SERVICE, _SHELL_PATH)
    shell = dbus.Interface(bus_object, _SHELL_IFACE)
    shell.Feedback(activity_id, cjson.encode(report),
            log_path if need_log else '')


def _excepthook(exctype, value, tb):
    global _log_formatter

    if _log_formatter is None:
        try:
            # Attempt to provide verbose IPython tracebacks.
            # Importing IPython is slow, so we import it lazily.
            from IPython.ultraTB import AutoFormattedTB
            formatter = AutoFormattedTB(mode='Verbose', color_scheme='NoColor')
            _log_formatter = formatter.text
        except ImportError:
            import traceback
            _log_formatter = \
                    lambda * args: ''.join(traceback.format_exception(*args))

    message = _log_formatter(exctype, value, tb)
    logging.error(message)

    trigger('unhandled_exception', need_log=True)


sys.excepthook = _excepthook