ChatdServerClientExample: Difference between revisions

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'''You can find the current version of this page at [[ClientServerChatExample]].'''

A very simple example for you, the lazy reader, who can't be bothered to read the manual!<br>

But note, this example is by no way a substitute of [[HowToWriteGamesUsingArianne]] and it is only intended for readers that want a light introduction to Arianne.

=Server=

First we create the server class using python.

<pre>

import marauroa.game.python.PythonRP

class ChatServer(marauroa.game.python.PythonRP):

def __init__(self, zone):

self._zone=zone

self._removeAttributes=[]

def execute(self, id, action):

result=0

player=self._zone.get(id)

action_code=action.get("type")

if action_code='chat':

player.put('text',action.get('text'))

self._zone.modify(player)

self._removeAttributes.append(player)

result=1

return result

def nextTurn(self):

for player in self._removeAttributes:

if player.has('text'):

player.remove('text')

self._zone.modify(player)

def onInit(self, object):

self._zone.add(object)

return 1

def onExit(self, objectid):

self._zone.remove(objectid)

return 1

def onTimeout(self, objectid):

return onExit(self,objectid)

</pre>

Ok, most of it is just trivial stuff. The core code is at execute and nextTurn.<br>

The execute method is the one called to execute the actions the client sends and it is really simple, it adds the messages content as a player attribute, and the trick thing is that is add the player a list so that it can be deleted the attribute in the next turn.

The nextTurn just delete the attributes that now are useless.

=Client=

The client is a bit more complex. We need to make it login and choose a character. We will use a curses wrapper for python.

'''TODO:''' Improve it

<pre>

import pyarianne

import curses

import os

import time

import signal

import sys

def sendMessage(lines):

text = ""

for i in lines:

text = text + i + "\n"

action=pyarianne.RPAction()

action.put("type","chat")

action.put("content",text)

pyarianne.send(action)

def paintStatusArea(text):

statusArea.clear()

statusArea.border()

statusArea.addstr(1,1,text)

statusArea.refresh()

def paintTextArea(history_lines):

textArea.clear()

textArea.border()

textArea.addstr(0,3," The first marauroa-python-curses-chat client ")

row=1

for line_entry in history_lines:

name = line_entry['name']

text = line_entry['text']

name = name.rjust(16)+": "

textArea.addstr(row,1,name,curses.color_pair(1))

textArea.addstr(text,curses.color_pair(2))

row=row+1

textArea.refresh()

def paintInputArea(text):

inputArea.clear()

inputArea.border()

inputArea.addstr(1,1,">"+text)

inputArea.refresh()

def repaintInputArea():

global text

paintInputArea(text)

def dostuffonCallback():

if False:

winmain.addstr(0,0,"Calling from Python!")

def printChatMessage(world):

global history_lines

if True:

for i in world.objects:

if world.objects[i].get("type") == "character":

name = world.objects[i].get("name")

if world.objects[i].has("?text"):

text = world.objects[i].get("?text")

text_lines = text.split("\n")

for line in text_lines:

if line != "":

history_lines.append({'name': name,'text': line})

#if overflow - remove first element

while len(history_lines) > 18:

history_lines.pop(0)

paintTextArea(history_lines)

repaintInputArea()

def initCurses():

stdscr = curses.initscr()

curses.noecho()

curses.cbreak()

stdscr.keypad(True)

stdscr.nodelay(True)

if curses.has_colors():

curses.start_color()

curses.init_pair(1, curses.COLOR_BLUE, curses.COLOR_BLACK);

curses.init_pair(2, curses.COLOR_GREEN, curses.COLOR_BLACK);

curses.init_pair(3, curses.COLOR_YELLOW, curses.COLOR_BLACK);

curses.init_pair(4, curses.COLOR_RED, curses.COLOR_BLACK);

curses.init_pair(5, curses.COLOR_CYAN, curses.COLOR_BLACK);

curses.init_pair(6, curses.COLOR_MAGENTA,curses.COLOR_BLACK);

curses.init_pair(7, curses.COLOR_WHITE, curses.COLOR_BLACK);

return stdscr

def uninitCurses(sign,arg2):

signal.signal(sign, signal.SIG_IGN)

try:

curses.nocbreak()

stdscr.keypad(0)

stdscr.nodelay(0)

curses.echo()

curses.endwin()

print "Exiting by signal "+ str(sign)

except err:

print "Exception: " +str(err)

sys.exit(0)

stdscr = initCurses()

#register singal handler to be able to restore the console

signal.signal(signal.SIGINT, uninitCurses)

signal.signal(signal.SIGTERM, uninitCurses)

begin_x = 0 ; begin_y = 0

height = 20 ; width = 100

textArea = curses.newwin(height, width, begin_y, begin_x)

begin_x = 0 ; begin_y = 20

height = 3 ; width = 100

inputArea = curses.newwin(height, width, begin_y, begin_x)

inputArea.keypad(True)

inputArea.nodelay(True)

begin_x = 0 ; begin_y = 23

height = 3 ; width = 100

statusArea = curses.newwin(height, width, begin_y, begin_x)

world=pyarianne.World()

perceptionHandler=pyarianne.PerceptionHandler()

pyarianne.setIdleMethod(dostuffonCallback)

pyarianne.connectToArianne("marauroa.ath.cx",3214)

paintStatusArea("Connecting to server...")

text = ""

history_lines = []

if pyarianne.login("root777","root777"):

chars=pyarianne.availableCharacters()

paintStatusArea("Logged in, choosing character "+chars[0]+"...")

if pyarianne.chooseCharacter(chars[0]):

paintStatusArea("Choosed character "+chars[0])

exit = False

repaintInputArea()

while True:

time.sleep(0.2)

if pyarianne.hasPerception():

perception=pyarianne.getPerception()

perceptionHandler.applyPerception(perception, world)

printChatMessage(world)

ch = inputArea.getch()

if ch != curses.ERR :

if ch == 10 or ch == curses.KEY_ENTER: #enter

if text == "/quit":

break

if text != "":

sendMessage([text])

text = ""

else:

text = text + str(chr(ch))

repaintInputArea()

pyarianne.logout()

else:

paintStatusArea("CAN'T CHOOSE: "+pyarianne.errorReason())

else:

paintStatusArea("CAN'T LOGIN: "+pyarianne.errorReason())

paintStatusArea("Finishing pyclient")

uninitCurses(1,2)

</pre>

And here you can see how it looks:

[http://tribus.dyndns.org/~keiner/cursed-chat-client.png Chat Client Screenshot]

[[Category:Marauroa]]