From a183f681013dc6cb344e452bb58f8a5590939fad Mon Sep 17 00:00:00 2001
From: nicolargo <nicolas@nicolargo.com>
Date: Fri, 21 Oct 2016 22:06:02 +0200
Subject: [PATCH] Add thresholds and update docs (issue #937)

---
 conf/glances.conf                 |   5 ++++
 docs/_static/wifi.png             | Bin 9385 -> 8692 bytes
 docs/aoa/wifi.rst                 |  17 +++++++++---
 glances/plugins/glances_plugin.py |  16 ++++++------
 glances/plugins/glances_wifi.py   |  42 ++++++++++++++++++++++--------
 5 files changed, 58 insertions(+), 22 deletions(-)

diff --git a/conf/glances.conf b/conf/glances.conf
index 6ada518a..41c6702f 100644
--- a/conf/glances.conf
+++ b/conf/glances.conf
@@ -114,6 +114,11 @@ critical=90
 [wifi]
 # Define the list of hidden wireless network interfaces (comma-separated regexp)
 hide=lo,docker.*
+# Define SIGNAL thresholds in db (lower is better...)
+# Based on: http://serverfault.com/questions/501025/industry-standard-for-minimum-wifi-signal-strength
+careful=-65
+warning=-75
+critical=-85
 
 #[diskio]
 # Define the list of hidden disks (comma-separated regexp)
diff --git a/docs/_static/wifi.png b/docs/_static/wifi.png
index 1b865b2a2301a8c80ebc13107b3402a7ce6e0e89..328c556ebfb1a06873583ef5d4722f1aceccd87a 100644
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diff --git a/docs/aoa/wifi.rst b/docs/aoa/wifi.rst
index 6a91721d..46ffdef8 100644
--- a/docs/aoa/wifi.rst
+++ b/docs/aoa/wifi.rst
@@ -5,14 +5,25 @@ Wifi
 
 .. image:: ../_static/wifi.png
 
-Glances displays the Wifi hotspot name and quality where the host is connected.
+Glances displays the Wifi hotspots' name and signal quality.
 If Glances is ran as root, then all the available hotspots are displayed.
 
+In the configuration file, you can define signal quality thresholds.
+"Poor" quality is between -100 and -85dBm, "Good" quality between -85
+and -60dBm, and "Excellent" between -60 and -40dBm.
+
 It's also possible to disable the scan on a specific interface from the
-configuration file (``[network]`` section). For example, if you want to
-hide the loopback interface (lo) and all the virtual docker interface:
+configuration file (``[wifi]`` section). For example, if you want to
+hide the loopback interface (lo) and all the virtual docker interfaces:
 
 .. code-block:: ini
 
     [wifi]
     hide=lo,docker.*
+    # Define SIGNAL thresholds in dBm (lower is better...)
+    careful=-65
+    warning=-75
+    critical=-85
+
+You can disable this plugin using the --disable-wifi option or by heating
+the 'W' from the user interface.
diff --git a/glances/plugins/glances_plugin.py b/glances/plugins/glances_plugin.py
index 63b80742..6ab2fc49 100644
--- a/glances/plugins/glances_plugin.py
+++ b/glances/plugins/glances_plugin.py
@@ -503,11 +503,11 @@ class GlancesPlugin(object):
         # If is_max is set then display the value in MAX
         ret = 'MAX' if is_max else 'OK'
         try:
-            if value > self.__get_limit('critical', stat_name=stat_name):
+            if value >= self.get_limit('critical', stat_name=stat_name):
                 ret = 'CRITICAL'
-            elif value > self.__get_limit('warning', stat_name=stat_name):
+            elif value >= self.get_limit('warning', stat_name=stat_name):
                 ret = 'WARNING'
-            elif value > self.__get_limit('careful', stat_name=stat_name):
+            elif value >= self.get_limit('careful', stat_name=stat_name):
                 ret = 'CAREFUL'
             elif current < minimum:
                 ret = 'CAREFUL'
@@ -516,7 +516,7 @@ class GlancesPlugin(object):
 
         # Manage log
         log_str = ""
-        if self.__get_limit_log(stat_name=stat_name, default_action=log):
+        if self.get_limit_log(stat_name=stat_name, default_action=log):
             # Add _LOG to the return string
             # So stats will be highlited with a specific color
             log_str = "_LOG"
@@ -537,7 +537,7 @@ class GlancesPlugin(object):
         """Manage the action for the current stat"""
         # Here is a command line for the current trigger ?
         try:
-            command = self.__get_limit_action(trigger, stat_name=stat_name)
+            command = self.get_limit_action(trigger, stat_name=stat_name)
         except KeyError:
             # Reset the trigger
             self.actions.set(stat_name, trigger)
@@ -578,7 +578,7 @@ class GlancesPlugin(object):
                               action_key=action_key,
                               log=True)
 
-    def __get_limit(self, criticity, stat_name=""):
+    def get_limit(self, criticity, stat_name=""):
         """Return the limit value for the alert."""
         # Get the limit for stat + header
         # Exemple: network_wlan0_rx_careful
@@ -594,7 +594,7 @@ class GlancesPlugin(object):
         # Return the limit
         return limit
 
-    def __get_limit_action(self, criticity, stat_name=""):
+    def get_limit_action(self, criticity, stat_name=""):
         """Return the action for the alert."""
         # Get the action for stat + header
         # Exemple: network_wlan0_rx_careful_action
@@ -608,7 +608,7 @@ class GlancesPlugin(object):
         # Return the action list
         return ret
 
-    def __get_limit_log(self, stat_name, default_action=False):
+    def get_limit_log(self, stat_name, default_action=False):
         """Return the log tag for the alert."""
         # Get the log tag for stat + header
         # Exemple: network_wlan0_rx_log
diff --git a/glances/plugins/glances_wifi.py b/glances/plugins/glances_wifi.py
index a7036fab..b42939f1 100644
--- a/glances/plugins/glances_wifi.py
+++ b/glances/plugins/glances_wifi.py
@@ -129,19 +129,36 @@ class Plugin(GlancesPlugin):
 
         return self.stats
 
+    def get_alert(self, value):
+        """Overwrite the default get_alert method.
+        Alert is on signal quality where lower is better...
+
+        :returns: string -- Signal alert
+        """
+
+        ret = 'OK'
+        try:
+            if value <= self.get_limit('critical', stat_name=self.plugin_name):
+                ret = 'CRITICAL'
+            elif value <= self.get_limit('warning', stat_name=self.plugin_name):
+                ret = 'WARNING'
+            elif value <= self.get_limit('careful', stat_name=self.plugin_name):
+                ret = 'CAREFUL'
+        except KeyError:
+            ret = 'DEFAULT'
+
+        return ret
+
     def update_views(self):
         """Update stats views."""
         # Call the father's method
         super(Plugin, self).update_views()
 
         # Add specifics informations
-        # Alert
-        # for i in self.stats:
-        #     ifrealname = i['interface_name'].split(':')[0]
-        #     self.views[i[self.get_key()]]['rx']['decoration'] = self.get_alert(int(i['rx'] // i['time_since_update'] * 8),
-        #                                                                        header=ifrealname + '_rx')
-        #     self.views[i[self.get_key()]]['tx']['decoration'] = self.get_alert(int(i['tx'] // i['time_since_update'] * 8),
-        #                                                                        header=ifrealname + '_tx')
+        # Alert on signal thresholds
+        for i in self.stats:
+            self.views[i[self.get_key()]]['signal']['decoration'] = self.get_alert(i['signal'])
+            self.views[i[self.get_key()]]['quality']['decoration'] = self.views[i[self.get_key()]]['signal']['decoration']
 
     def msg_curse(self, args=None, max_width=None):
         """Return the dict to display in the curse interface."""
@@ -163,15 +180,15 @@ class Plugin(GlancesPlugin):
         # Header
         msg = '{:{width}}'.format('WIFI', width=ifname_max_width)
         ret.append(self.curse_add_line(msg, "TITLE"))
-        msg = '{:>6}'.format('Quality')
+        msg = '{:>7}'.format('dBm')
         ret.append(self.curse_add_line(msg))
 
         # Hotspot list (sorted by name)
         for i in sorted(self.stats, key=operator.itemgetter(self.get_key())):
-            ret.append(self.curse_new_line())
             # Do not display hotspot with no name (/ssid)
             if i['ssid'] == '':
                 continue
+            ret.append(self.curse_new_line())
             # New hotspot
             hotspotname = i['ssid']
             # Add the encryption type (if it is available)
@@ -183,7 +200,10 @@ class Plugin(GlancesPlugin):
             # Add the new hotspot to the message
             msg = '{:{width}}'.format(hotspotname, width=ifname_max_width)
             ret.append(self.curse_add_line(msg))
-            msg = '{:>7}'.format(i['quality'], width=ifname_max_width)
-            ret.append(self.curse_add_line(msg))
+            msg = '{:>7}'.format(i['signal'], width=ifname_max_width)
+            ret.append(self.curse_add_line(msg,
+                                           self.get_views(item=i[self.get_key()],
+                                                          key='signal',
+                                                          option='decoration')))
 
         return ret