is_lagging indicator and internet connection check

-adds is_lagging indicator as a key from daemon_status, which is set to
True during a phase of the startup sequence, presently only during
loading_wallet if catching up with the blockchain takes longer than a
minute.

-checks if connected to internet before trying to start

lbrynet/core/LBRYcrdWallet.py

@@ -70,6 +70,8 @@ class LBRYWallet(object):
         self.max_expected_payment_time = datetime.timedelta(minutes=3)
         self.stopped = True
 
+        self.is_lagging = None
+
         self.manage_running = False
         self._manage_count = 0
         self._balance_refresh_time = 3
@@ -996,15 +998,17 @@ class LBRYumWallet(LBRYWallet):
                 self._catch_up_check = None
                 blockchain_caught_d.callback(True)
             elif remote_height != 0:
+                self.blocks_behind_alert = remote_height - local_height
+                if self.blocks_behind_alert > self.max_behind:
+                    self.max_behind = self.blocks_behind_alert
+                self.catchup_progress = int(100 * (self.blocks_behind_alert / (5 + self.max_behind)))
                 if self._caught_up_counter == 0:
                     alert.info('Catching up to the blockchain...showing blocks left...')
                 if self._caught_up_counter % 30 == 0:
-                    self.blocks_behind_alert = remote_height - local_height
-                    if self.blocks_behind_alert > self.max_behind:
-                        self.max_behind = self.blocks_behind_alert
-                    self.catchup_progress = int(100 * (self.blocks_behind_alert / (5 + self.max_behind)))
                     alert.info('%d...', (remote_height - local_height))
-                    alert.info("Catching up: " + str(int(100 * (self.blocks_behind_alert / (5 + self.max_behind)))) + "%")
+                    alert.info("Catching up: " + str(self.catchup_progress) + "%")
+                if self._caught_up_counter >= 600:
+                    self.is_lagging = True
 
                 self._caught_up_counter += 1
 

lbrynet/lbrynet_daemon/LBRYDaemon.py

@@ -928,10 +928,12 @@ class LBRYDaemon(jsonrpc.JSONRPC):
             if status_code is 'loading_wallet', also contains key 'progress': blockchain catchup progress
         """
 
-        r = {'code': self.startup_status[0], 'message': self.startup_status[1], 'progress': None}
+        r = {'code': self.startup_status[0], 'message': self.startup_status[1], 'progress': None, 'is_lagging': None}
         if self.startup_status[0] == 'loading_wallet':
             r['message'] = r['message'] % (str(self.session.wallet.blocks_behind_alert) + " blocks behind")
             r['progress'] = self.session.wallet.catchup_progress
+            r['is_lagging'] = self.session.wallet.is_lagging
+
         log.info("[" + str(datetime.now()) + "] daemon status: " + str(r))
         return self._render_response(r, OK_CODE)
 

lbrynet/lbrynet_daemon/LBRYDaemonControl.py

@@ -6,6 +6,8 @@ import os
 import shutil
 import webbrowser
 import sys
+import socket
+
 
 from StringIO import StringIO
 from zipfile import ZipFile
@@ -34,6 +36,16 @@ handler = logging.handlers.RotatingFileHandler(LOG_FILENAME, maxBytes=262144, ba
 log.addHandler(handler)
 logging.basicConfig(level=logging.INFO)
 
+REMOTE_SERVER = "www.google.com"
+
+def test_internet_connection():
+    try:
+        host = socket.gethostbyname(REMOTE_SERVER)
+        s = socket.create_connection((host, 80), 2)
+        return True
+    except:
+        return False
+
 
 def stop():
     def _disp_shutdown():
@@ -104,6 +116,10 @@ def start():
         version_dir = os.path.join(data_dir, "ui_version_history")
 
         git_version = subprocess.check_output(GIT_CMD_STRING, shell=True)
+        if not git_version:
+            log.info("You should have been notified to install xcode command line tools, once it's installed you can start LBRY")
+            sys.exit(0)
+
         ui_version_info = git_version
 
         if not os.path.isdir(data_dir):
@@ -113,15 +129,11 @@ def start():
             os.mkdir(version_dir)
 
         if not os.path.isfile(os.path.join(version_dir, git_version)):
-            try:
-                f = open(os.path.join(version_dir, git_version), "w")
-                version_message = "[" + str(datetime.now()) + "] Updating UI --> " + git_version
-                f.write(version_message)
-                f.close()
-                log.info(version_message)
-            except:
-                log.info("You should have been notified to install xcode command line tools, once it's installed you can start LBRY")
-                sys.exit(0)
+            f = open(os.path.join(version_dir, git_version), "w")
+            version_message = "[" + str(datetime.now()) + "] Updating UI --> " + git_version
+            f.write(version_message)
+            f.close()
+            log.info(version_message)
 
             if os.path.isdir(os.path.join(data_dir, "lbry-web-ui")):
                 shutil.rmtree(os.path.join(data_dir, "lbry-web-ui"))
@@ -149,9 +161,12 @@ def start():
         reactor.listenTCP(API_PORT, server.Site(root), interface=API_INTERFACE)
         return daemon.setup()
 
-    d = getui(args.ui)
-    d.addCallback(lambda r: setupserver(r[0], r[1]))
-    d.addCallback(lambda r: setupapi(r[0], args.wallet, r[1]))
-    d.addCallback(lambda _: webbrowser.open(UI_ADDRESS))
-
-    reactor.run()
+    if test_internet_connection():
+        d = getui(args.ui)
+        d.addCallback(lambda r: setupserver(r[0], r[1]))
+        d.addCallback(lambda r: setupapi(r[0], args.wallet, r[1]))
+        d.addCallback(lambda _: webbrowser.open(UI_ADDRESS))
+        reactor.run()
+    else:
+        log.info("Not connected to internet, unable to start")
+        return