# LoRaWAN Decoder file for Dragino LDS02
#
# References
#  LHT52 User Manual:     https://wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDS02%20-%20LoRaWAN%20Door%20Sensor%20User%20Manual/
#  TTN Device Repository: https://github.com/TheThingsNetwork/lorawan-devices/blob/master/vendor/dragino/lds02.js

import string

if !global.lds02Nodes      # data survive to decoder reload
  global.lds02Nodes = {}
end

class LwDecoLDS02
  static def decodeUplink(Name, Node, RSSI, FPort, Bytes)
    var data = {"Device":"Dragino LDS02"}

    var valid_values = false
    var last_seen = 1451602800
    var battery_last_seen = 1451602800
    var battery
    var rssi = RSSI
    var door_open
    var door_open_last_seen = 1451602800
    if global.lds02Nodes.find(Node)
      door_open           = global.lds02Nodes.item(Node)[6]
      door_open_last_seen = global.lds02Nodes.item(Node)[7]
    end
    ## SENSOR DATA ##
    if 10 == FPort && Bytes.size() == 10
      last_seen = tasmota.rtc('local')

      var last_door_open = door_open
      door_open = ( Bytes[0] & 0x80 ) ? 1 : 0
      data.insert("DoorOpen", ( door_open ) ? true : false)
      if last_door_open != door_open
        door_open_last_seen = tasmota.rtc('local')
      end

      data.insert("BattV", ( Bytes[1] | (Bytes[0] << 8) & 0x3FFF ) / 1000.0)
      battery_last_seen = tasmota.rtc('local')
      battery = ( Bytes[1] | (Bytes[0] << 8) & 0x3FFF ) / 1000.0
      data.insert("DoorOpenEvents", Bytes[5] | (Bytes[4] << 8) | (Bytes[3] << 16 ))
      data.insert("DoorOpenLastDuration_mins", Bytes[8] | (Bytes[7] << 8) | (Bytes[6] << 16))
      data.insert("Alarm", (Bytes[9] & 0x01 ) ? true : false)
      valid_values = true
    else
      # Ignore other Fports
    end #Fport

    if valid_values
      if global.lds02Nodes.find(Node)
        global.lds02Nodes.remove(Node)
      end
      #                         sensor[0]   [1]   [2]        [3]                [4]      [5]   [6]        [7]
      global.lds02Nodes.insert(Node, [Name, Node, last_seen, battery_last_seen, battery, RSSI, door_open, door_open_last_seen])
    end

    return data
  end #decodeUplink()

  static def add_web_sensor()
    var fmt = global.LwSensorFormatter_cls()
    var msg = ""
    for sensor: global.lds02Nodes
      var name = sensor[0]
      if string.find(name, "LDS02") > -1                                    # If LoRaWanName contains LDS02 use LDS02-<node>
        name = string.format("LDS02-%i", sensor[1])
      end
      var name_tooltip = "Dragino LDS02"
      var last_seen = sensor[2]
      var battery_last_seen = sensor[3]
      var battery = sensor[4]
      var rssi = sensor[5]
      msg += fmt.header(name, name_tooltip, battery, battery_last_seen, rssi, last_seen)

      # Sensors
      var door_open = sensor[6]
      var door_open_last_seen = sensor[7]
      msg += "<tr class='htr'><td colspan='4'>&#9478;"                      # |
      msg += string.format(" %s %s", (door_open) ? "&#x1F513" : "&#x1F512", # Open or Closed lock - Door
                                     fmt.dhm(door_open_last_seen))
      msg += "{e}"                                                          # = </td></tr>
    end
    return msg
  end #add_web_sensor()
end #class

global.LwDeco = LwDecoLDS02