90 lines
2.7 KiB
Python
90 lines
2.7 KiB
Python
"""Functions to print a label to a mixin printer"""
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import logging
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import sys
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import traceback
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from django.conf import settings
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from django.utils.translation import gettext_lazy as _
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from django.views.debug import ExceptionReporter
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import pdf2image
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from error_report.models import Error
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import common.notifications
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from plugin.registry import registry
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logger = logging.getLogger('inventree')
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def print_label(plugin_slug, pdf_data, filename=None, label_instance=None, user=None):
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"""
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Print label with the provided plugin.
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This task is nominally handled by the background worker.
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If the printing fails (throws an exception) then the user is notified.
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Arguments:
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plugin_slug: The unique slug (key) of the plugin
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pdf_data: Binary PDF data
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filename: The intended name of the printed label
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"""
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logger.info(f"Plugin '{plugin_slug}' is printing a label '{filename}'")
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plugin = registry.plugins.get(plugin_slug, None)
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if plugin is None: # pragma: no cover
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logger.error(f"Could not find matching plugin for '{plugin_slug}'")
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return
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# In addition to providing a .pdf image, we'll also provide a .png file
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png_file = pdf2image.convert_from_bytes(
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pdf_data,
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dpi=300,
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)[0]
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try:
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plugin.print_label(
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pdf_data=pdf_data,
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png_file=png_file,
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filename=filename,
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label_instance=label_instance,
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width=label_instance.width,
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height=label_instance.height,
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user=user
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)
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except Exception as e: # pragma: no cover
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# Plugin threw an error - notify the user who attempted to print
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ctx = {
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'name': _('Label printing failed'),
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'message': str(e),
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}
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# Log an error message to the database
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kind, info, data = sys.exc_info()
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Error.objects.create(
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kind=kind.__name__,
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info=info,
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data='\n'.join(traceback.format_exception(kind, info, data)),
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path='print_label',
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html=ExceptionReporter(None, kind, info, data).get_traceback_html(),
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)
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logger.error(f"Label printing failed: Sending notification to user '{user}'") # pragma: no cover
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# Throw an error against the plugin instance
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common.notifications.trigger_notification(
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plugin.plugin_config(),
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'label.printing_failed',
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targets=[user],
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context=ctx,
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delivery_methods=set([common.notifications.UIMessageNotification])
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)
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if settings.TESTING:
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# If we are in testing mode, we want to know about this exception
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raise e
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