First check for threaded network checks.

TODO: tests.

4 files changed, 116 insertions, 0 deletions

diff --git a/src/leap/base/constants.py b/src/leap/base/constants.py
index 7a1415fb..8a76b6b4 100644
--- a/src/leap/base/constants.py
+++ b/src/leap/base/constants.py
@@ -28,3 +28,5 @@ DEFAULT_PROVIDER_DEFINITION = {
     u'version': u'0.1.0'}
 
 MAX_ICMP_PACKET_LOSS = 10
+
+ROUTE_CHECK_INTERVAL = 120
diff --git a/src/leap/base/network.py b/src/leap/base/network.py
new file mode 100644
index 00000000..58f903e1
--- /dev/null
+++ b/src/leap/base/network.py
@@ -0,0 +1,55 @@
+# -*- coding: utf-8 -*-
+from __future__ import (print_function)
+
+from leap.base.checks import LeapNetworkChecker
+from leap.base.constants import ROUTE_CHECK_INTERVAL
+from leap.util.coroutines import (launch_thread, process_events)
+
+from time import sleep
+
+class NetworkChecker(object):
+    """
+    Manages network checking thread that makes sure we have a working network
+    connection.
+    """
+    def __init__(self, *args, **kwargs):
+        self.status_signals = kwargs.pop('status_signals', None)
+        self.watcher_cb = kwargs.pop('status_signals', None)
+
+    def start(self):
+        self._launch_recurrent_network_checks((self.watcher_cb,))
+
+    def stop(self):
+        raise NotImplementedError
+
+    def run_checks(self):
+        pass
+
+    #private methods
+
+    #here all the observers in fail_callbacks expect one positional argument,
+    #which is exception so we can try by passing a lambda with logger to
+    #check it works.
+    def _network_checks_thread(self, fail_callbacks):
+        print('fail_callbacks: %s' % fail_callbacks)
+        print(len(fail_callbacks))
+        observer_dict = dict(((
+            observer, process_events(observer)) for observer in fail_callbacks))
+        netchecker = LeapNetworkChecker()
+        while True:
+            try:
+                netchecker.check_internet_connection()
+                sleep(ROUTE_CHECK_INTERVAL)
+            except Exception as exc:
+                for obs in observer_dict:
+                    observer_dict[obs].send(exc)
+
+
+    def _launch_recurrent_network_checks(fail_callbacks):
+        print(type(fail_callbacks))
+        watcher = launch_thread(
+            network_checks_thread,
+            (fail_callbacks,))
+        return watcher
+
+
diff --git a/src/leap/baseapp/mainwindow.py b/src/leap/baseapp/mainwindow.py
index 10b23d9a..7b2ecb1d 100644
--- a/src/leap/baseapp/mainwindow.py
+++ b/src/leap/baseapp/mainwindow.py
@@ -8,6 +8,7 @@ from PyQt4 import QtGui
 from leap.baseapp.eip import EIPConductorAppMixin
 from leap.baseapp.log import LogPaneMixin
 from leap.baseapp.systray import StatusAwareTrayIconMixin
+from leap.baseapp.network import NetworkCheckerAppMixin
 from leap.baseapp.leap_app import MainWindowMixin
 
 logger = logging.getLogger(name=__name__)
@@ -16,6 +17,7 @@ logger = logging.getLogger(name=__name__)
 class LeapWindow(QtGui.QMainWindow,
                  MainWindowMixin, EIPConductorAppMixin,
                  StatusAwareTrayIconMixin,
+                 NetworkCheckerAppMixin,
                  LogPaneMixin):
     """
     main window for the leap app.
@@ -36,6 +38,7 @@ class LeapWindow(QtGui.QMainWindow,
             self.createLogBrowser()
         EIPConductorAppMixin.__init__(self, opts=opts)
         StatusAwareTrayIconMixin.__init__(self)
+        NetworkCheckerAppMixin.__init__(self)
         MainWindowMixin.__init__(self)
 
         # bind signals
diff --git a/src/leap/baseapp/network.py b/src/leap/baseapp/network.py
new file mode 100644
index 00000000..42a42fcd
--- /dev/null
+++ b/src/leap/baseapp/network.py
@@ -0,0 +1,56 @@
+from __future__ import print_function
+import logging
+import time
+logger = logging.getLogger(name=__name__)
+
+from leap.base.network import NetworkChecker
+from leap.baseapp.dialogs import ErrorDialog
+
+
+class NetworkCheckerAppMixin(object):
+    """
+    initialize an instance of the Network Checker,
+    which gathers error and passes them on.
+    """
+
+    def __init__(self, *args, **kwargs):
+        opts = kwargs.pop('opts', None)
+        config_file = getattr(opts, 'config_file', None)
+
+        self.network_checker_started = False
+
+        self.network_checker = NetworkChecker(
+            watcher_cb=self.newLogLine.emit,
+            status_signals=(self.statusChange.emit, ),
+            debug=self.debugmode)
+
+        self.network_checker.run_checks()
+        self.error_check()
+
+    def error_check(self):
+        """
+        consumes the conductor error queue.
+        pops errors, and acts accordingly (launching user dialogs).
+        """
+        logger.debug('error check')
+
+        errq = self.conductor.error_queue
+        while errq.qsize() != 0:
+            logger.debug('%s errors left in conductor queue', errq.qsize())
+            # we get exception and original traceback from queue
+            error, tb = errq.get()
+
+            # redundant log, debugging the loop.
+            logger.error('%s: %s', error.__class__.__name__, error.message)
+
+            if issubclass(error.__class__, eip_exceptions.EIPClientError):
+                self.handle_eip_error(error)
+
+            else:
+                # deprecated form of raising exception.
+                raise error, None, tb
+
+            if error.failfirst is True:
+                break
+
+