mirror of
https://github.com/pkali/piradio-mini.git
synced 2026-05-21 06:39:47 +02:00
Jakub Husak
154 lines
4.7 KiB
Python
154 lines
4.7 KiB
Python
import telnetlib
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import urllib
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import select
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from screen import Screen
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class Server(object):
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""" LCDproc Server Object """
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def __init__(self, hostname="localhost", port=13666, debug=False):
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""" Constructor """
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self.debug = debug
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self.hostname = hostname
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self.port = port
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self.tn = telnetlib.Telnet(self.hostname, self.port)
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self.server_info = dict()
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self.screens = dict()
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self.keys = list()
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def start_session(self):
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""" Start Session """
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response = self.request("hello")
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print(response)
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bits = response.split(" ")
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self.server_info.update({
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"server_version": bits[2],
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"protocol_version": bits[4],
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"screen_width": int(bits[7]),
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"screen_height": int(bits[9]),
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"cell_width": int(bits[11]),
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"cell_height": int(bits[13])
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})
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return response
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def request(self, command_string):
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""" Request """
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#self.tn.write((command_string + "\n").encode())
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self.tn.write((command_string + "\n"))
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if self.debug: print "Telnet Request: %s" % (command_string)
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while True:
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response = urllib.unquote(self.tn.read_until(b"\n").decode())
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if "success" in response: # Normal successful reply
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break
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if "huh" in response: # Something went wrong
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break
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if "connect" in response: # Special reply to "hello"
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break
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# TODO Keep track of which screen is displayed
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# Try again if response was key, menu or visibility notification.
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if "huh" in response or self.debug: print "Telnet Response: %s" % (response[:-1])
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return response
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def poll(self):
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"""
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Poll
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Check for a non-response string generated by LCDd and return any string read.
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LCDd generates strings for key presses, menu events & screen visibility changes.
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"""
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if select.select([self.tn], [], [], 0) == ([self.tn], [], []):
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response = urllib.unquote(self.tn.read_until(b"\n").decode())
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if self.debug: print "Telnet Poll: %s" % (response[:-1])
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# TODO Keep track of which screen is displayed
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return response
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else:
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return None
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def add_screen(self, ref):
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""" Add Screen """
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if ref not in self.screens:
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screen = Screen(self, ref)
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screen.clear() # TODO Check this is needed, new screens should be clear.
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self.screens[ref] = screen
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return self.screens[ref]
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return self.screens[ref]
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def del_screen(self, ref):
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""" Delete/Remove Screen """
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self.request("screen_del %s" % (ref))
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del(self.screens[ref])
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def add_key(self, ref, mode = "shared"):
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"""
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Add a key.
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(ref)
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Return key name or None on error
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"""
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if ref not in self.keys:
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response = self.request("client_add_key %s -%s" % (ref, mode))
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if "success" not in response: return None
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self.keys.append(ref)
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return ref
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def del_key(self, ref):
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"""
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Delete a key.
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(ref)
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Return None or LCDd response on error
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"""
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if ref not in self.keys:
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response = self.request("client_del_key %s" % (ref))
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self.keys.remove(ref)
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if "success" in response:
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return None
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else:
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return response
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def output(self, value):
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"""
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Sets the client's output (on, off, int)
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Sets the general purpose output on some display modules to this value.
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Use on to set all outputs to high state, and off to set all to low state.
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The meaning of the integer value depends on your specific device, usually
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it is a bit pattern describing the state of each output line.
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Return None or LCDd response on error
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"""
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response = self.request(("output %s" % (value)).encode())
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if "success" in response:
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return None
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else:
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return response
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def get_server_info(self):
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"""
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Returns information about the server and the connected
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LCD as a dictionary with the following keys:
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"server_version", "protocol_version",
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"screen_width", "screen_height",
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"cell_width", "cell_height"
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"""
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return self.server_info
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