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https://github.com/inventree/InvenTree.git
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8bcf72fbb2
* Fix barcode scanning in web interface * Improve error handling for barcode scan dialog * JS linting
117 lines
3.5 KiB
Python
117 lines
3.5 KiB
Python
"""The InvenTreeBarcodePlugin validates barcodes generated by InvenTree itself. It can be used as a template for developing third-party barcode plugins.
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The data format is very simple, and maps directly to database objects,
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via the "id" parameter.
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Parsing an InvenTree barcode simply involves validating that the
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references model objects actually exist in the database.
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"""
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import json
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from company.models import SupplierPart
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from InvenTree.helpers import hash_barcode
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from part.models import Part
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from plugin import InvenTreePlugin
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from plugin.mixins import BarcodeMixin
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from stock.models import StockItem, StockLocation
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class InvenTreeBarcodePlugin(BarcodeMixin, InvenTreePlugin):
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"""Generic base class for handling InvenTree barcodes"""
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@staticmethod
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def get_supported_barcode_models():
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"""Returns a list of database models which support barcode functionality"""
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return [
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Part,
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StockItem,
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StockLocation,
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SupplierPart,
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]
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def format_matched_response(self, label, model, instance):
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"""Format a response for the scanned data"""
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data = {
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'pk': instance.pk
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}
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# Add in the API URL if available
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if hasattr(model, 'get_api_url'):
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data['api_url'] = f"{model.get_api_url()}{instance.pk}/"
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# Add in the web URL if available
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if hasattr(instance, 'get_absolute_url'):
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url = instance.get_absolute_url()
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data['web_url'] = url
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else:
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url = None
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response = {
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label: data
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}
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if url is not None:
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response['url'] = url
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return response
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class InvenTreeInternalBarcodePlugin(InvenTreeBarcodePlugin):
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"""Builtin BarcodePlugin for matching and generating internal barcodes."""
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NAME = "InvenTreeInternalBarcode"
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def scan(self, barcode_data):
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"""Scan a barcode against this plugin.
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Here we are looking for a dict object which contains a reference to a particular InvenTree database object
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"""
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if type(barcode_data) is dict:
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pass
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elif type(barcode_data) is str:
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try:
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barcode_data = json.loads(barcode_data)
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except json.JSONDecodeError:
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return None
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else:
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return None
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if type(barcode_data) is not dict:
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return None
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# Look for various matches. First good match will be returned
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for model in self.get_supported_barcode_models():
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label = model.barcode_model_type()
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if label in barcode_data:
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try:
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instance = model.objects.get(pk=barcode_data[label])
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return self.format_matched_response(label, model, instance)
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except (ValueError, model.DoesNotExist):
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pass
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class InvenTreeExternalBarcodePlugin(InvenTreeBarcodePlugin):
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"""Builtin BarcodePlugin for matching arbitrary external barcodes."""
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NAME = "InvenTreeExternalBarcode"
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def scan(self, barcode_data):
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"""Scan a barcode against this plugin.
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Here we are looking for a dict object which contains a reference to a particular InvenTree databse object
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"""
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for model in self.get_supported_barcode_models():
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label = model.barcode_model_type()
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barcode_hash = hash_barcode(barcode_data)
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instance = model.lookup_barcode(barcode_hash)
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if instance is not None:
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return self.format_matched_response(label, model, instance)
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