Factor ping interval and ping timeout in to the main loop's minimum interval

IRCBot.py

@@ -65,7 +65,7 @@ class Bot(object):
         next = None
         for timer in self.timers:
             time_left = timer.time_left()
-            if not next or time_left < next:
+            if next == None or time_left < next:
                 next = time_left
 
         if next == None:
@@ -83,18 +83,28 @@ class Bot(object):
         next = None
         for server in self.servers.values():
             timeout = server.send_throttle_timeout()
-            if server.waiting_send() and (not next or timeout < next):
+            if server.waiting_send() and (next == None or timeout < next):
                 next = timeout
-        if next == None:
-            return None
-        if next < 0:
-            return 0
         return next
 
+    def next_ping(self):
+        timeouts = []
+        for server in self.servers.values():
+            timeouts.append(server.until_next_ping())
+        return min(timeouts)
+    def next_read_timeout(self):
+        timeouts = []
+        for server in self.servers.values():
+            timeouts.append(server.until_read_timeout())
+        return min(timeouts)
+
     def get_poll_timeout(self):
-        next_timer = self.next_timer() or 30
+        timeouts = []
-        next_write = self.next_send() or 30
+        timeouts.append(self.next_timer())
-        return min(next_timer, next_write)
+        timeouts.append(self.next_send())
+        timeouts.append(self.next_ping())
+        timeouts.append(self.next_read_timeout())
+        return min([timeout for timeout in timeouts if not timeout == None])
 
     def register_read(self, server):
         self.poll.modify(server.fileno(), select.EPOLLIN)
@@ -104,10 +114,6 @@ class Bot(object):
         self.poll.modify(server.fileno(),
             select.EPOLLIN|select.EPOLLOUT)
 
-    def since_last_read(self, server):
-        return None if not server.last_read else time.monotonic(
-            )-server.last_read
-
     def disconnect(self, server):
         try:
             self.poll.unregister(server.fileno())
@@ -157,12 +163,10 @@ class Bot(object):
                         server.disconnect()
 
             for server in list(self.servers.values()):
-                since_last_read = self.since_last_read(server)
+                if server.read_timed_out():
-                if since_last_read:
-                    if since_last_read > 120:
                     print("pingout from %s" % str(server))
                     server.disconnect()
-                    elif since_last_read > 30 and not server.ping_sent:
+                elif server.ping_due() and not server.ping_sent:
                         server.send_ping()
                         server.ping_sent = True
                 if not server.connected:

IRCServer.py

@@ -1,9 +1,12 @@
 import collections, socket, ssl, sys, time
 import IRCChannel, IRCUser
 
-OUR_TLS_PROTOCOL = ssl.PROTOCOL_SSLv23
 THROTTLE_LINES = 4
 THROTTLE_SECONDS = 1
+READ_TIMEOUT_SECONDS = 120
+PING_INTERVAL_SECONDS = 30
+
+OUR_TLS_PROTOCOL = ssl.PROTOCOL_SSLv23
 if hasattr(ssl, "PROTOCOL_TLS"):
     OUR_TLS_PROTOCOL = ssl.PROTOCOL_TLS
 
@@ -38,7 +41,7 @@ class Server(object):
         self.channel_modes = []
         self.channel_types = []
 
-        self.last_read = None
+        self.last_read = time.monotonic()
         self.last_send = None
 
         self.attempted_join = {}
@@ -204,6 +207,19 @@ class Server(object):
         self.last_read = time.monotonic()
         self.ping_sent = False
         return decoded_lines
+
+    def until_next_ping(self):
+        return max(0, (self.last_read+PING_INTERVAL_SECONDS
+            )-time.monotonic())
+    def ping_due(self):
+        return self.until_next_ping() == 0
+
+    def until_read_timeout(self):
+        return max(0, (self.last_read+READ_TIMEOUT_SECONDS
+            )-time.monotonic())
+    def read_timed_out(self):
+        return self.until_read_timeout == 0
+
     def send(self, data):
         encoded = data.split("\n")[0].strip("\r").encode("utf8")
         if len(encoded) > 450: