<?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_INT" 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, collections

Alarms = []
AlarmIndex = {}
lastid = 0

def TriggerAlarm(changed_var_name):
    global Alarms, lastid
    new_entry = [time.time(), PLCGlobals.AlarmText, PLCGlobals.AlarmStatus, lastid]
    Alarms.append(new_entry)
    AlarmIndex[lastid] = new_entry
    lastid = lastid + 1
    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)
        args = newdata['args']
        range_feedback = newdata['range']
        slider_position = newdata['position']
        visible = newdata['visible']
        extra = newdata['extra']
        options = newdata['options']

        if len(options) == 1 :
            action, = options
            if action == "action_reset":
                del Alarms[:]
                AlarmIndex.clear()
        elif len(options) == 2 :
            action, alarmid = options
            if action == "onClick[acknowledge]":
                AlarmIndex[int(alarmid)][2] = "ack"

        answer = self.renderTable(range_feedback, slider_position, visible, extra)
        janswer = json.dumps(answer)
        return janswer.encode()

    def renderTable(self, old_range, old_position, visible, extra):
        if len(extra) > 0 and extra[0] != "":
            fAlarms = [alrm for alrm in Alarms if alrm[1].find(extra[0])!=-1]
        else:
            fAlarms = Alarms[:]
        fAlarms.reverse()
        new_range = len(fAlarms)
        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, alarmid in fAlarms[new_position:new_position + new_visible]:
            visible_alarms.append({
                "time": time.ctime(ts),
                "text": text, # TODO translate text
                "status": status,
                "alarmid": alarmid
            })

        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[

AddPathToSVGHMIServers(b"alarms", AlarmJsonResource)


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