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odoo.define('barcodes.BarcodeParser', function (require) {
"use strict";
var Class = require('web.Class');
var rpc = require('web.rpc');
// The BarcodeParser is used to detect what is the category
// of a barcode (product, partner, ...) and extract an encoded value
// (like weight, price, etc.)
var BarcodeParser = Class.extend({
init: function(attributes) {
this.nomenclature_id = attributes.nomenclature_id;
this.loaded = this.load();
},
// This loads the barcode nomenclature and barcode rules which are
// necessary to parse the barcodes. The BarcodeParser is operational
// only when those data have been loaded
load: function(){
var self = this;
if (!this.nomenclature_id) {
return;
}
var id = this.nomenclature_id[0];
return rpc.query({
model: 'barcode.nomenclature',
method: 'read',
args: [[id], ['name','rule_ids','upc_ean_conv']],
})
.then(function (nomenclatures){
self.nomenclature = nomenclatures[0];
var args = [
[['barcode_nomenclature_id', '=', self.nomenclature.id]],
['name', 'sequence', 'type', 'encoding', 'pattern', 'alias'],
];
return rpc.query({
model: 'barcode.rule',
method: 'search_read',
args: args,
});
}).then(function(rules){
rules = rules.sort(function(a, b){ return a.sequence - b.sequence; });
self.nomenclature.rules = rules;
});
},
// resolves when the barcode parser is operational.
is_loaded: function() {
return this.loaded;
},
// returns the checksum of the ean13, or -1 if the ean has not the correct length, ean must be a string
ean_checksum: function(ean){
var code = ean.split('');
if(code.length !== 13){
return -1;
}
var oddsum = 0, evensum = 0, total = 0;
code = code.reverse().splice(1);
for(var i = 0; i < code.length; i++){
if(i % 2 === 0){
oddsum += Number(code[i]);
}else{
evensum += Number(code[i]);
}
}
total = oddsum * 3 + evensum;
return Number((10 - total % 10) % 10);
},
// returns the checksum of the ean8, or -1 if the ean has not the correct length, ean must be a string
ean8_checksum: function(ean){
var code = ean.split('');
if (code.length !== 8) {
return -1;
}
var sum1 = Number(code[1]) + Number(code[3]) + Number(code[5]);
var sum2 = Number(code[0]) + Number(code[2]) + Number(code[4]) + Number(code[6]);
var total = sum1 + 3 * sum2;
return Number((10 - total % 10) % 10);
},
// returns true if the ean is a valid EAN barcode number by checking the control digit.
// ean must be a string
check_ean: function(ean){
return /^\d+$/.test(ean) && this.ean_checksum(ean) === Number(ean[ean.length-1]);
},
// returns true if the barcode string is encoded with the provided encoding.
check_encoding: function(barcode, encoding) {
var len = barcode.length;
var allnum = /^\d+$/.test(barcode);
var check = Number(barcode[len-1]);
if (encoding === 'ean13') {
return len === 13 && allnum && this.ean_checksum(barcode) === check;
} else if (encoding === 'ean8') {
return len === 8 && allnum && this.ean8_checksum(barcode) === check;
} else if (encoding === 'upca') {
return len === 12 && allnum && this.ean_checksum('0'+barcode) === check;
} else if (encoding === 'any') {
return true;
} else {
return false;
}
},
// returns a valid zero padded ean13 from an ean prefix. the ean prefix must be a string.
sanitize_ean: function(ean){
ean = ean.substr(0,13);
for(var n = 0, count = (13 - ean.length); n < count; n++){
ean = '0' + ean;
}
return ean.substr(0,12) + this.ean_checksum(ean);
},
// Returns a valid zero padded UPC-A from a UPC-A prefix. the UPC-A prefix must be a string.
sanitize_upc: function(upc) {
return this.sanitize_ean('0'+upc).substr(1,12);
},
// Checks if barcode matches the pattern
// Additionnaly retrieves the optional numerical content in barcode
// Returns an object containing:
// - value: the numerical value encoded in the barcode (0 if no value encoded)
// - base_code: the barcode in which numerical content is replaced by 0's
// - match: boolean
match_pattern: function (barcode, pattern, encoding){
var match = {
value: 0,
base_code: barcode,
match: false,
};
barcode = barcode.replace("\\", "\\\\").replace("{", '\{').replace("}", "\}").replace(".", "\.");
var numerical_content = pattern.match(/[{][N]*[D]*[}]/); // look for numerical content in pattern
var base_pattern = pattern;
if(numerical_content){ // the pattern encodes a numerical content
var num_start = numerical_content.index; // start index of numerical content
var num_length = numerical_content[0].length; // length of numerical content
var value_string = barcode.substr(num_start, num_length-2); // numerical content in barcode
var whole_part_match = numerical_content[0].match("[{][N]*[D}]"); // looks for whole part of numerical content
var decimal_part_match = numerical_content[0].match("[{N][D]*[}]"); // looks for decimal part
var whole_part = value_string.substr(0, whole_part_match.index+whole_part_match[0].length-2); // retrieve whole part of numerical content in barcode
var decimal_part = "0." + value_string.substr(decimal_part_match.index, decimal_part_match[0].length-1); // retrieve decimal part
if (whole_part === ''){
whole_part = '0';
}
match['value'] = parseInt(whole_part) + parseFloat(decimal_part);
// replace numerical content by 0's in barcode and pattern
match['base_code'] = barcode.substr(0,num_start);
var base_pattern = pattern.substr(0,num_start);
for(var i=0;i<(num_length-2);i++) {
match['base_code'] += "0";
base_pattern += "0";
}
match['base_code'] += barcode.substr(num_start+num_length-2,barcode.length-1);
base_pattern += pattern.substr(num_start+num_length,pattern.length-1);
match['base_code'] = match['base_code']
.replace("\\\\", "\\")
.replace("\{", "{")
.replace("\}","}")
.replace("\.",".");
var base_code = match.base_code.split('')
if (encoding === 'ean13') {
base_code[12] = '' + this.ean_checksum(match.base_code);
} else if (encoding === 'ean8') {
base_code[7] = '' + this.ean8_checksum(match.base_code);
} else if (encoding === 'upca') {
base_code[11] = '' + this.ean_checksum('0' + match.base_code);
}
match.base_code = base_code.join('')
}
if (base_pattern[0] !== '^') {
base_pattern = "^" + base_pattern;
}
match.match = match.base_code.match(base_pattern);
return match;
},
// attempts to interpret a barcode (string encoding a barcode Code-128)
// it will return an object containing various information about the barcode.
// most importantly :
// - code : the barcode
// - type : the type of the barcode (e.g. alias, unit product, weighted product...)
//
// - value : if the barcode encodes a numerical value, it will be put there
// - base_code : the barcode with all the encoding parts set to zero; the one put on
// the product in the backend
parse_barcode: function(barcode){
var parsed_result = {
encoding: '',
type:'error',
code:barcode,
base_code: barcode,
value: 0,
};
if (!this.nomenclature) {
return parsed_result;
}
var rules = this.nomenclature.rules;
for (var i = 0; i < rules.length; i++) {
var rule = rules[i];
var cur_barcode = barcode;
if ( rule.encoding === 'ean13' &&
this.check_encoding(barcode,'upca') &&
this.nomenclature.upc_ean_conv in {'upc2ean':'','always':''} ){
cur_barcode = '0' + cur_barcode;
} else if (rule.encoding === 'upca' &&
this.check_encoding(barcode,'ean13') &&
barcode[0] === '0' &&
this.upc_ean_conv in {'ean2upc':'','always':''} ){
cur_barcode = cur_barcode.substr(1,12);
}
if (!this.check_encoding(cur_barcode,rule.encoding)) {
continue;
}
var match = this.match_pattern(cur_barcode, rules[i].pattern, rule.encoding);
if (match.match) {
if(rules[i].type === 'alias') {
barcode = rules[i].alias;
parsed_result.code = barcode;
parsed_result.type = 'alias';
}
else {
parsed_result.encoding = rules[i].encoding;
parsed_result.type = rules[i].type;
parsed_result.value = match.value;
parsed_result.code = cur_barcode;
if (rules[i].encoding === "ean13"){
parsed_result.base_code = this.sanitize_ean(match.base_code);
}
else{
parsed_result.base_code = match.base_code;
}
return parsed_result;
}
}
}
return parsed_result;
},
});
return BarcodeParser;
});
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