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buslights.py
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buslights.py
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import json, requests, time, hmac, hashlib, math, socket, os, datetime
from subprocess import Popen, PIPE
import subprocess
import socket
import sys
import time
import random
import base64
import platform
import signal
configdir = os.path.join(os.path.dirname(os.path.abspath(__file__)))
with open(configdir+'/config.json') as f:
config = json.load(f)
NODE_PATH = config["executables"]["node"]
PYTHON_PATH = config["executables"]["python"]
class BusController:
"""BusLights Controller class"""
def __init__(self, master_url):
""" Initialize """
import socket
self._master_url = master_url
self._httpClient = requests.Session()
self._running = True
self._subprocess = None
self._script_name = None
self._fallback_script_name = None
def api_call(self, remote_method, data = {}):
request_url = self._master_url + remote_method
s = self._httpClient
if len(data) > 0:
try:
r = s.post(request_url, json=data)
except requests.exceptions.ConnectionError as e:
r = s.post(request_url, json=data)
pass
else:
try:
r = s.get(request_url)
except requests.exceptions.ConnectionError as e:
r = s.get(request_url)
pass
Debug('api_call:'+str(r.text))
Debug('returning')
return r.json()
def GetRunningScript(self):
request_result = self.api_call('running')
self._fallback_script_name = request_result['script_name']
return request_result['script_name']
def stopScript(self):
if not self._subprocess:
return
Debug("Signalling STOP")
os.kill(self._subprocess.pid,signal.SIGKILL)
Debug("Waiting for subprocess to stop...")
self._subprocess.wait()
Debug("Killed!")
# Send black screen update
self.sendBlackScreen()
# Reset subprocess handle
self._subprocess = None
def sendBlackScreen(self):
self.runScript( 'blackscreen.py' )
def updateServerPatterns(self):
script_files = [f for f in os.listdir("scripts") if os.path.isfile(os.path.join("scripts", f)) and f[-3:] != "pyc" and f != "lovebus.py" and f[-3:] != "jpg"]
self.api_call('update',script_files)
def run(self):
Debug("Updating script files to server")
self.updateServerPatterns()
while True:
Debug("Loop...")
script_name = self.GetRunningScript()
Debug( "Controller State: " + str( script_name ) )
if self._script_name != None and script_name != self._script_name:
Debug( "Changing states from " + self._script_name + " to " + script_name )
self.stopScript()
self._script_name = script_name
sleep = 1
Debug("Subprocess: " + str(self._subprocess))
if script_name == '':
Debug("Player is set down, sleeping for 60 seconds")
sleep = 60
self.updateServerPatterns()
self.runScript( config["default_script"] )
elif self._script_name != script_name:
# Send stop
self.stopScript()
Debug("Spawning script player")
self.runScript( script_name )
sleep = 5
Debug( self._subprocess.poll() )
Debug( self._subprocess.stdout )
(sod,sed) = self._subprocess.communicate()
print sod
elif self._subprocess != None and self._subprocess.poll() == None:
Debug("Animation player already running")
sleep = 5
else:
Debug("Animation player not running")
Debug("Spawning script player")
self.runScript( script_name )
sleep = 5
Debug( "Sleeping[" + str(sleep) + "]..." )
for per in range(0, sleep):
time.sleep(1)
def runScript(self,script_name):
self._script_name = script_name
script_file = "scripts/" + script_name
Debug("Spawning scripted animation: " + script_file)
self._subprocess = None
if script_file[-3:] == ".js":
self._subprocess = subprocess.Popen([ NODE_PATH, script_file ], stdout=PIPE, stdin=PIPE, stderr=PIPE)
elif script_file[-3:] == ".py":
self._subprocess = subprocess.Popen([ PYTHON_PATH, script_file ], stdout=PIPE, stdin=PIPE, stderr=PIPE)
def Debug(message):
if Debug: print datetime.datetime.now(), message