135 lines
5.9 KiB
Python
135 lines
5.9 KiB
Python
import re
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from odoo import models, fields, api
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from odoo.tools import check_barcode_encoding, get_barcode_check_digit
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UPC_EAN_CONVERSIONS = [
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('none', 'Never'),
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('ean2upc', 'EAN-13 to UPC-A'),
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('upc2ean', 'UPC-A to EAN-13'),
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('always', 'Always'),
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]
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class BarcodeNomenclature(models.Model):
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_name = 'barcode.nomenclature'
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_description = 'Barcode Nomenclature'
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name = fields.Char(string='Barcode Nomenclature', size=32, required=True, help='An internal identification of the barcode nomenclature')
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rule_ids = fields.One2many('barcode.rule', 'barcode_nomenclature_id', string='Rules', help='The list of barcode rules')
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upc_ean_conv = fields.Selection(
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UPC_EAN_CONVERSIONS, string='UPC/EAN Conversion', required=True, default='always',
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help="UPC Codes can be converted to EAN by prefixing them with a zero. This setting determines if a UPC/EAN barcode should be automatically converted in one way or another when trying to match a rule with the other encoding.")
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@api.model
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def sanitize_ean(self, ean):
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""" Returns a valid zero padded EAN-13 from an EAN prefix.
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:type ean: str
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"""
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ean = ean[0:13].zfill(13)
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return ean[0:-1] + str(get_barcode_check_digit(ean))
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@api.model
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def sanitize_upc(self, upc):
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""" Returns a valid zero padded UPC-A from a UPC-A prefix.
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:type upc: str
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"""
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return self.sanitize_ean('0' + upc)[1:]
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def match_pattern(self, barcode, pattern):
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"""Checks barcode matches the pattern and retrieves the optional numeric value in barcode.
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:param barcode:
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:type barcode: str
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:param pattern:
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:type pattern: str
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:return: an object containing:
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- value: the numerical value encoded in the barcode (0 if no value encoded)
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- base_code: the barcode in which numerical content is replaced by 0's
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- match: boolean
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:rtype: dict
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"""
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match = {
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'value': 0,
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'base_code': barcode,
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'match': False,
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}
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barcode = barcode.replace('\\', '\\\\').replace('{', '\\{').replace('}', '\\}').replace('.', '\\.')
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numerical_content = re.search("[{][N]*[D]*[}]", pattern) # look for numerical content in pattern
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if numerical_content: # the pattern encodes a numerical content
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num_start = numerical_content.start() # start index of numerical content
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num_end = numerical_content.end() # end index of numerical content
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value_string = barcode[num_start:num_end - 2] # numerical content in barcode
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whole_part_match = re.search("[{][N]*[D}]", numerical_content.group()) # looks for whole part of numerical content
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decimal_part_match = re.search("[{N][D]*[}]", numerical_content.group()) # looks for decimal part
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whole_part = value_string[:whole_part_match.end() - 2] # retrieve whole part of numerical content in barcode
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decimal_part = "0." + value_string[decimal_part_match.start():decimal_part_match.end() - 1] # retrieve decimal part
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if whole_part == '':
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whole_part = '0'
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if whole_part.isdigit():
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match['value'] = int(whole_part) + float(decimal_part)
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match['base_code'] = barcode[:num_start] + (num_end - num_start - 2) * "0" + barcode[num_end - 2:] # replace numerical content by 0's in barcode
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match['base_code'] = match['base_code'].replace("\\\\", "\\").replace("\\{", "{").replace("\\}", "}").replace("\\.", ".")
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pattern = pattern[:num_start] + (num_end - num_start - 2) * "0" + pattern[num_end:] # replace numerical content by 0's in pattern to match
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match['match'] = re.match(pattern, match['base_code'][:len(pattern)])
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return match
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def parse_barcode(self, barcode):
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""" Attempts to interpret and parse a barcode.
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:param barcode:
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:type barcode: str
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:return: A object containing various information about the barcode, like as:
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- code: the barcode
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- type: the barcode's type
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- value: if the id encodes a numerical value, it will be put there
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- base_code: the barcode code with all the encoding parts set to
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zero; the one put on the product in the backend
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:rtype: dict
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"""
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parsed_result = {
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'encoding': '',
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'type': 'error',
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'code': barcode,
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'base_code': barcode,
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'value': 0,
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}
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for rule in self.rule_ids:
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cur_barcode = barcode
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if rule.encoding == 'ean13' and check_barcode_encoding(barcode, 'upca') and self.upc_ean_conv in ['upc2ean', 'always']:
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cur_barcode = '0' + cur_barcode
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elif rule.encoding == 'upca' and check_barcode_encoding(barcode, 'ean13') and barcode[0] == '0' and self.upc_ean_conv in ['ean2upc', 'always']:
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cur_barcode = cur_barcode[1:]
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if not check_barcode_encoding(barcode, rule.encoding):
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continue
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match = self.match_pattern(cur_barcode, rule.pattern)
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if match['match']:
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if rule.type == 'alias':
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barcode = rule.alias
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parsed_result['code'] = barcode
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else:
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parsed_result['encoding'] = rule.encoding
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parsed_result['type'] = rule.type
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parsed_result['value'] = match['value']
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parsed_result['code'] = cur_barcode
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if rule.encoding == "ean13":
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parsed_result['base_code'] = self.sanitize_ean(match['base_code'])
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elif rule.encoding == "upca":
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parsed_result['base_code'] = self.sanitize_upc(match['base_code'])
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else:
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parsed_result['base_code'] = match['base_code']
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return parsed_result
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return parsed_result
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