From e91e14e894196642532c0b7be50b01c1354ad702 Mon Sep 17 00:00:00 2001
From: Alex Auvolat <alex.auvolat@ens.fr>
Date: Wed, 17 Jun 2015 09:23:47 -0400
Subject: Connect it to IRC ; add GFGRU model

---
 ircext.py | 125 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 125 insertions(+)
 create mode 100644 ircext.py

(limited to 'ircext.py')

diff --git a/ircext.py b/ircext.py
new file mode 100644
index 0000000..3e38ac2
--- /dev/null
+++ b/ircext.py
@@ -0,0 +1,125 @@
+from irc.client import SimpleIRCClient
+
+import logging
+
+import numpy
+
+import theano
+from theano import tensor
+
+from blocks.extensions import SimpleExtension
+from blocks.graph import ComputationGraph
+
+logging.basicConfig(level='INFO')
+logger = logging.getLogger('irc_ext')
+
+class IRCClient(SimpleIRCClient):
+    def __init__(self, chans, nick):
+        super(IRCClient, self).__init__()
+
+        self.chans = chans
+        self.nick = nick
+        self.server = None
+
+    def on_welcome(self, server, ev):
+        logger.info("Welcomed to " + repr(server))
+        for ch in self.chans:
+            if ch != '' and ch[0] == '#':
+                server.join(ch)
+
+    def on_join(self, server, ev):
+        self.server = server
+
+    def pred_line(self, pred_f, prob):
+        s = ''
+        while True:
+            prob = prob / 1.00001
+            pred = numpy.random.multinomial(1, prob[0, :]).nonzero()[0][0]
+
+            s = s + chr(int(pred))
+
+            prob, = pred_f(pred[None, None])
+
+            if s[-1] == '\n':
+                break
+        return s[:-1]
+
+    def privmsg(self, chan, msg):
+        logger.info("%s >> %s" % (chan, msg))
+        self.server.privmsg(chan, msg.decode('utf-8', 'ignore'))
+
+    def on_pubmsg(self, server, ev):
+        chan = ev.target.encode('utf-8')
+        nick = ev.source.split('!')[0].encode('utf-8')
+        msg = ev.arguments[0].encode('utf-8')
+
+        logger.info("%s <%s> %s" % (chan, nick, msg))
+
+        s0 = nick+'\t'+msg
+
+        rep = None
+
+        if chan in self.chans:
+            pred_f, _ = self.chans[chan]
+            if s0[-2:] == '^I':
+                prob, = pred_f(numpy.array([ord(x) for x in s0[:-2]], dtype='int16')[None, :])
+                s = self.pred_line(pred_f, prob)
+                rep = s0[:-2] + s
+            else:
+                # feed phrase to bot
+                prob, = pred_f(numpy.array([ord(x) for x in s0+'\n'], dtype='int16')[None, :])
+                if msg[:len(self.nick)+1] == self.nick+':':
+                    #TODO: make it so that it predicts a message beginning by 'nick: '
+                    # (ie it responds to the person who pinged it)
+                    rep = self.pred_line(pred_f, prob) 
+        else:
+            pass
+
+        if rep != None:
+            rep = rep.split('\t', 1)[1]
+            self.privmsg(chan, rep)
+
+class IRCClientExt(SimpleExtension):
+    def __init__(self, model, sample_temperature, server, port, nick, channels, **kwargs):
+        super(IRCClientExt, self).__init__(**kwargs)
+
+        # model output
+        out = model.out[:, -1, :] / numpy.float32(sample_temperature)
+        prob = tensor.nnet.softmax(out)
+
+        cg = ComputationGraph([prob])
+        assert(len(cg.inputs) == 1)
+        assert(cg.inputs[0].name == 'bytes')
+
+        # channel functions & state
+        chfun = {}
+        for ch in channels + ['']:
+            state_vars = [theano.shared(v[0:1, :].zeros_like().eval(), v.name+'-'+ch)
+                                    for v, _ in model.states]
+            givens = [(v, x) for (v, _), x in zip(model.states, state_vars)]
+            updates= [(x, upd) for x, (_, upd) in zip(state_vars, model.states)] 
+
+            pred = theano.function(inputs=cg.inputs, outputs=[prob],
+                                   givens=givens, updates=updates)
+            reset_states = theano.function(inputs=[], outputs=[],
+                                           updates=[(v, v.zeros_like()) for v in state_vars])
+            chfun[ch] = (pred, reset_states)
+
+        self.irc = IRCClient(chfun, nick)
+        self.irc.connect(server, port, nick)
+
+    def __getstate__(self):
+        state = dict(self.__dict__)
+        del state['irc']
+        return state
+
+    def __setstate__(self, state):
+        irc = self.irc
+        self.__dict__.update(state)
+        self.irc = irc
+
+    def do(self, which_callback, *args):
+        logger.info('Polling...')
+        self.irc.reactor.process_once()
+
+
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