2023-07-09 15:10:24 +02:00
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from math import inf
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from pysnmp.entity.engine import SnmpEngine
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from pysnmp.hlapi import getCmd, CommunityData, UdpTransportTarget, ContextData
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from pysnmp.smi.rfc1902 import ObjectType, ObjectIdentity
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from labeler.domain.objects import MediaDefinition, Dimension
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from labeler.infra.e550w_printer.media_definitions import (
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media_width,
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tape_color,
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text_color,
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media_type,
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WIDTH_BYTE,
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COLOR_BYTE,
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TEXT_COLOR_BYTE,
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TYPE_BYTE,
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)
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from labeler.interfaces import Printer
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class E550W(Printer):
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def __init__(self, ip_address: str):
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self.ip_address = ip_address
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self.snmp_port = 161
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def get_installed_media(self) -> MediaDefinition:
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2023-07-09 15:30:10 +02:00
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return self.__get_printer_status()
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2023-07-09 15:10:24 +02:00
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def __get_printer_status(self):
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raw_snmp_data = self.__get_snmp_status().asNumbers()
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width = media_width(raw_snmp_data[WIDTH_BYTE])
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media_tape_color = tape_color(raw_snmp_data[COLOR_BYTE])
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media_text_color = text_color(raw_snmp_data[TEXT_COLOR_BYTE])
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tape_type = media_type(raw_snmp_data[TYPE_BYTE])
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return MediaDefinition(
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width=Dimension(mm=width),
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length=Dimension(mm=inf),
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minimal_margin_vertical=Dimension(mm=1),
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minimal_margin_horizontal=Dimension(mm=2),
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dpi=600,
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description=f"{tape_type} - {width}mm, {media_text_color} on {media_tape_color} background",
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)
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def __get_snmp_status(self):
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"""
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This oid was found by using wireshark, however it's also documented here:
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https://support.brother.com/g/s/es/dev/en/command/faq/index.html?c=eu_ot&lang=en&navi=offall&comple=on&redirect=on
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just not for the E550W model.
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"""
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oid = "1.3.6.1.4.1.2435.3.3.9.1.6.1.0"
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error_indication, error_status, error_index, var_binds = next(
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getCmd(
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SnmpEngine(),
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CommunityData("public", mpModel=0),
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UdpTransportTarget((self.ip_address, self.snmp_port)),
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ContextData(),
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ObjectType(ObjectIdentity(oid)),
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)
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)
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if error_indication:
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raise Exception(error_indication)
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elif error_status:
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raise Exception(
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"%s at %s"
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% (
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error_status.prettyPrint(),
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error_index and var_binds[int(error_index) - 1][0] or "?",
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)
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)
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else:
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return var_binds[0][1]
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