Added basic chat example.

examples/chat app/client/client.py

@@ -0,0 +1,26 @@
+# -*- coding: utf-8 -*-
+""" client communication for this simple chat example application.
+This is a class derived from enetcomponents.client.client, which sends all data over pubsub via the topic response.
+"""
+from enetcomponents import client
+from pubsub import pub
+
+class client(client.client):
+
+	def network(self, event, data):
+		""" This functions receives data from an enet server in the following protocol:
+		dict(action="some_command", **kwargs)
+		This function will send all data to whatever listener in the pubsub stack by using the topic "response".
+	"""
+		f = data.get("action")
+		if f == None:
+			print("Error: Invalid data in protocol. %r" % (data))
+			return
+		pub.sendMessage("response", data=data)
+
+	def connected(self, peer):
+		pub.sendMessage("ask_login")
+
+	def disconnected(self, peer):
+		pub.sendMessage("disconnected")
+

examples/chat app/client/gui.py

@@ -0,0 +1,90 @@
+# -*- coding: utf-8 -*-
+""" Dfinition of all GUI components. """
+import wx
+
+class loginDialog(wx.Dialog):
+
+	def __init__(self, title="Login"):
+		super(loginDialog, self).__init__(parent=None, id=wx.ID_ANY)
+		self.SetTitle(title)
+		panel = wx.Panel(self)
+		sizer = wx.BoxSizer(wx.VERTICAL)
+		label1 = wx.StaticText(panel, wx.ID_ANY, "Username: ")
+		self.username = wx.TextCtrl(panel, wx.ID_ANY, size=(380, -1))
+		s = wx.BoxSizer(wx.HORIZONTAL)
+		s.Add(label1, 0, wx.ALL, 5)
+		s.Add(self.username, 0, wx.ALL, 5)
+		sizer.Add(s, 0, wx.ALL, 5)
+		label1 = wx.StaticText(panel, wx.ID_ANY, "Server: ")
+		self.server = wx.TextCtrl(panel, wx.ID_ANY, "localhost", size=(380, -1))
+		s = wx.BoxSizer(wx.HORIZONTAL)
+		s.Add(label1, 0, wx.ALL, 5)
+		s.Add(self.server, 0, wx.ALL, 5)
+		sizer.Add(s, 0, wx.ALL, 5)
+		label1 = wx.StaticText(panel, wx.ID_ANY, "Port: ")
+		self.port = wx.SpinCtrl(panel, wx.ID_ANY, size=(380, -1))
+		self.port.SetRange(1024, 65000)
+		self.port.SetValue(33333)
+		s = wx.BoxSizer(wx.HORIZONTAL)
+		s.Add(label1, 0, wx.ALL, 5)
+		s.Add(self.port, 0, wx.ALL, 5)
+		sizer.Add(s, 0, wx.ALL, 5)
+
+#		label2 = wx.StaticText(panel, wx.ID_ANY, "Password: ")
+#		self.password = wx.TextCtrl(panel, wx.ID_ANY, size=(380, -1), style=wx.TE_PASSWORD)
+#		ss = wx.BoxSizer(wx.HORIZONTAL)
+#		ss.Add(label2, 0, wx.ALL, 5)
+#		ss.Add(self.password, 0, wx.ALL, 5)
+#		sizer.Add(ss, 0, wx.ALL, 5)
+		ok = wx.Button(panel, wx.ID_OK, "Log in")
+		ok.SetDefault()
+		cancel = wx.Button(panel, wx.ID_CANCEL)
+		self.SetEscapeId(wx.ID_CANCEL)
+		bs = wx.BoxSizer(wx.HORIZONTAL)
+		bs.Add(ok, 0, wx.ALL, 5)
+		bs.Add(cancel, 0, wx.ALL, 5)
+		sizer.Add(bs, 0, wx.ALL, 5)
+		panel.SetSizer(sizer)
+		self.SetClientSize(sizer.CalcMin())
+
+class appFrame(wx.Frame):
+	def __init__(self):
+		super(appFrame, self).__init__(parent=None, title="Chat Window")
+		self.Maximize(True)
+		self.panel = wx.Panel(self)
+		self.sizer = wx.BoxSizer(wx.VERTICAL)
+		self.sb = self.CreateStatusBar()
+		lbl = wx.StaticText(self.panel, wx.ID_ANY, "menu")
+		self.list = wx.ListBox(self.panel, wx.ID_ANY)
+		self.sizer.Add(lbl, 0, wx.GROW)
+		self.sizer.Add(self.list, 1, wx.GROW)
+		lbl = wx.StaticText(self.panel, -1, "Chat")
+		self.chat = wx.TextCtrl(self.panel, -1)
+		sizerchat = wx.BoxSizer(wx.HORIZONTAL)
+		sizerchat.Add(lbl, 0, wx.ALL, 5)
+		sizerchat.Add(self.chat, 0, wx.ALL, 5)
+		self.sizer.Add(sizerchat, 0, wx.ALL, 5)
+		lbl1 = wx.StaticText(self.panel, wx.ID_ANY, "History")
+		self.history = wx.TextCtrl(self.panel, wx.ID_ANY, style=wx.TE_READONLY|wx.TE_MULTILINE, size=(500, 300))
+		box = wx.BoxSizer(wx.HORIZONTAL)
+		box.Add(lbl1, 0, wx.ALL, 5)
+		box.Add(self.history, 0, wx.ALL, 5)
+		self.sizer.Add(box, 0, wx.ALL, 5)
+		self.panel.SetSizerAndFit(self.sizer)
+
+	def get_item(self):
+		return self.list.GetSelection()
+
+	def add_message(self, message, reverse=False):
+		old_line = self.history.GetNumberOfLines()
+		point = self.history.GetInsertionPoint()
+		if reverse:
+			self.history.SetValue(message+"\n"+self.history.GetValue())
+		else:
+			self.history.AppendText(message+"\n")
+		self.history.SetInsertionPoint(point)
+		new_line = self.history.GetNumberOfLines()#.count("\n")
+		return (old_line, new_line)
+
+	def  show_connection_error(self):
+		msg = wx.MessageDialog(None, "Connection error. Try again", "error", style=wx.ICON_ERROR).ShowModal()

examples/chat app/client/main.py

@@ -0,0 +1,91 @@
+# -*- coding: utf-8 -*-
+import sys
+import threading
+import wx
+import client
+import output
+import gui
+from pubsub import pub
+
+# Client instance.
+c = None
+
+# thread to keep the client running.
+t = None
+
+class controller(object):
+	def __init__(self, window):
+		super(controller, self).__init__()
+		self.window = window
+		self.connect_events()
+		self.window.Show()
+
+	def connect_events(self):
+		self.window.chat.Bind(wx.EVT_CHAR_HOOK, self.on_process)
+		pub.subscribe(self.response, "response")
+		pub.subscribe(self.ask_login, "ask_login")
+		pub.subscribe(self.disconnected, "disconnected")
+
+	def on_process(self, event):
+		key = event.GetKeyCode()
+		if key == wx.WXK_RETURN:
+			self.send_message()
+		event.Skip()
+
+	def send_message(self):
+		global c
+		message = self.window.chat.GetValue()
+		if message == "" or message == None:
+			return wx.Bell()
+		# Otherwise, message does exist.
+		data = dict(action="send_message", message=message)
+		c.send_data(0, data)
+		self.window.chat.ChangeValue("")
+
+	def response(self, data):
+		command = data.get("action")
+		if hasattr(self, "cmd_"+command):
+			getattr(self, "cmd_"+command)(data)
+
+	def cmd_connected(self, data):
+		connected = data.get("nickname")
+		msg = "{} has entered this platform".format(connected)
+		self.window.add_message(msg)
+
+	def cmd_message(self, data):
+		msg = data.get("message")
+		nickname = data.get("nickname")
+		msg = "{0}: {1}".format(nickname, msg)
+		output.speak(msg)
+		self.window.add_message(msg)
+
+	def ask_login(self):
+		global c
+		data = dict(action="login", nickname=self.username)
+		c.send_data(0, data)
+
+	def disconnected(self):
+		self.window.show_connection_error()
+		wx.GetApp().ExitMainLoop()
+
+def setup():
+	global c, t
+	output.setup()
+	app = wx.App()
+	d = gui.loginDialog()
+	f = gui.appFrame()
+	mainController = controller(f)
+	if d.ShowModal() != wx.ID_OK:
+		return
+	username = d.username.GetValue()
+	server = bytes(d.server.GetValue(), "utf-8")
+	port = int(d.port.GetValue())
+	mainController.username = username
+	d.Destroy()
+	c = client.client(host=server, port=port)
+	t = threading.Thread(target=c.run)
+	t.start()
+	app.MainLoop()
+	c.close()
+
+setup()

examples/chat app/client/output.py

@@ -0,0 +1,31 @@
+# *- coding: utf-8 -*-
+""" Simple (really simple) module to provide text to speech output in a chat window."""
+import logging as original_logging
+logger = original_logging.getLogger('core.output')
+from accessible_output2 import outputs
+import sys
+
+speaker = None
+retries = 0
+
+def speak(text, interrupt=0):
+	global speaker, retries
+	if not speaker:
+		setup()
+	try:
+		speaker.speak(text, interrupt)
+	except:
+		if retries < 5:
+			retries = retries + 1
+			speak(text)
+
+def setup ():
+	global speaker
+	logger.debug("Initializing output subsystem.")
+	try:
+		speaker = outputs.auto.Auto()
+	except:
+		logger.exception("Output: Error during initialization.")
+
+def enable_sapi():
+	speaker = outputs.sapi.SAPI5()

examples/chat app/requirements.txt

@@ -0,0 +1,7 @@
+pyenet
+wxpython==4.0.3
+pypubsub
+pywin32
+git+https://code.manuelcortez.net/manuelcortez/libloader
+git+https://code.manuelcortez.net/manuelcortez/platform_utils
+git+https://code.manuelcortez.net/manuelcortez/accessible_output2

examples/chat app/server/server.py

@@ -0,0 +1,51 @@
+from enetcomponents import server
+
+class channel(server.channel):
+
+	def __init__(self, *args, **kwargs):
+		super(channel, self).__init__(*args, **kwargs)
+		self.nickname = None
+
+	def network(self, event, data):
+		f = data.get("action")
+		if f == None:
+			print("Error: Invalid data in protocol. %r" % (data))
+			return
+		if hasattr(self, "cmd_"+f) == False:
+			print("Error: function cmd_{} does not exist".format(f))
+			return
+		getattr(self, "cmd_"+f)(data)
+
+	def cmd_login(self, data):
+		nickname = data.get("nickname")
+		self.nickname = nickname
+		self.room = "public"
+		d = dict(action="connected", nickname=nickname)
+		self.server.send_to_all(0, d)
+
+	def cmd_send_message(self, data):
+		data.update(nickname=self.nickname, action="message")
+		for channel in self.server.peers:
+			if channel.room == self.room:
+				channel.send_data(0, data)
+
+class server(server.server):
+
+	def __init__(self, *args, **kwargs):
+		super(server, self).__init__(*args, **kwargs)
+		self.rooms = list()
+
+	def connected(self, peer):
+		p = channel(self, peer)
+		self.peers[p] = True
+
+	def disconnected(self, peer):
+		for channel in self.peers:
+			if peer.incomingPeerID == channel.peer.incomingPeerID:
+				del self.peers[channel]
+				break
+
+if __name__ == "__main__":
+	print("Starting chat server...")
+	s = server()
+	s.run()