<?xml version='1.0' encoding='utf-8'?>
<PyFile xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <variables>
    <variable name="AlarmNotify" type="HMI_INT"/>
    <variable name="SendAlarm" type="HMI_BOOL" onchange="TriggerAlarm"/>
    <variable name="AlarmText" type="HMI_STRING" initial="'POS'"/>
    <variable name="AlarmStatus" type="HMI_STRING" initial="'alarm'"/>
  </variables>
  <globals>
    <xhtml:p><![CDATA[
from twisted.web.resource import Resource
import json, time, random

Alarms = []

def TriggerAlarm(changed_var_name):
    global Alarms
    if(getattr(PLCGlobals, changed_var_name)):
        Alarms.append((time.time(), PLCGlobals.AlarmText, PLCGlobals.AlarmStatus))
        PLCGlobals.AlarmNotify = random.randint(0, 4294967296)

class AlarmJsonResource(Resource):
    def render_GET(self, request):
        return ''

    def render_POST(self, request):
        newstr = request.content.getvalue()
        newdata = json.loads(newstr)
        print newdata
        vars = newdata[u'vars']
        args = newdata[u'args']
        visible = newdata[u'visible']
        svars = (vars + [0,0])[:3]
        range_feedback = svars[1]
        slider_position = svars[2]
        answer = self.renderTable(range_feedback, slider_position, visible, *(args+svars[3:]))
        janswer = json.dumps(answer)
        print janswer
        return janswer

    def renderTable(self, old_range, old_position, visible, *options):
        new_range = len(Alarms)
        delta = new_range - visible
        new_position = 0 if delta <= 0 else delta if old_position > delta else old_position
        new_visible = new_range if delta <= 0 else visible
        
        visible_alarms = []
        for ts, text, status in Alarms[new_position:new_position + new_visible]:
            visible_alarms.append({
                "time": time.ctime(ts),
                "text": text, # TODO translate text
                "status": status
            })

        return new_range, new_position, visible_alarms


]]></xhtml:p>
  </globals>
  <init>
    <xhtml:p><![CDATA[
]]></xhtml:p>
  </init>
  <cleanup>
    <xhtml:p><![CDATA[
]]></xhtml:p>
  </cleanup>
  <start>
    <xhtml:p><![CDATA[

svghmi_root.putChild("alarms", AlarmJsonResource())


]]></xhtml:p>
  </start>
  <stop>
    <xhtml:p><![CDATA[
]]></xhtml:p>
  </stop>
</PyFile>