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https://github.com/inventree/InvenTree.git
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Oliver
d84b67ddf4
* Updates for label printing settings: - Make LABEL_ENABLE a global setting - Add LABEL_DPI setting (default = 300) - Add new global settings tab * Use the configured DPI when printing labels
80 lines
2.6 KiB
Python
80 lines
2.6 KiB
Python
"""Functions to print a label to a mixin printer."""
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import logging
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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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import pdf2image
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import common.notifications
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from common.models import InvenTreeSetting
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from InvenTree.exceptions import log_error
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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: str, pdf_data, filename=None, label_instance=None, user=None):
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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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Args:
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plugin_slug (str): 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. Defaults to None.
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label_instance (Union[LabelTemplate, None], optional): The template instance that should be printed. Defaults to None.
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user (Union[User, None], optional): User that should be informed of errors. Defaults to None.
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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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dpi = InvenTreeSetting.get_setting('LABEL_DPI', 300)
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png_file = pdf2image.convert_from_bytes(
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pdf_data,
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dpi=dpi,
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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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log_error('plugin.print_label')
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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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