1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
/**
* Copyright 2009 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS-IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
var billing = {};
billing.CC = function(shortName, prefixes, length) {
this.type = shortName;
this.prefixes = prefixes;
this.length = length;
function validateLuhn(number) {
var digits = [];
var sum = 0;
for (var i = 0; i < number.length; ++i) {
var c = Number(number.charAt(number.length-1-i));
sum += c;
if (i % 2 == 1) { // every second digit
sum += c;
if (2*c >= 10) {
sum -= 9;
}
}
}
return (sum % 10 == 0);
}
this.validatePrefix = function(number) {
for (var i = 0; i < this.prefixes.length; ++i) {
if (number.indexOf(String(this.prefixes[i])) == 0) {
return true;
}
}
return false;
}
this.validateLength = function(number) {
return number.length == this.length;
}
this.validateNumber = function(number) {
return this.validateLength(number) &&
this.validatePrefix(number) &&
validateLuhn(number);
}
}
billing.ccTypes = [
new billing.CC('amex', [34, 37], 15),
new billing.CC('disc', [6011, 644, 645, 646, 647, 648, 649, 65], 16),
new billing.CC('mc', [51, 52, 53, 54, 55], 16),
new billing.CC('visa', [4], 16)];
billing.validateCcNumber = function(number) {
if (! (/^\d+$/.test(number))) {
return false;
}
for (var i = 0; i < billing.ccTypes.length; ++i) {
var ccType = billing.ccTypes[i];
if (ccType.validatePrefix(number)) {
return ccType.validateNumber(number);
}
}
return false;
}
billing.validateCcLength = function(number) {
for (var i = 0; i < billing.ccTypes.length; ++i) {
var ccType = billing.ccTypes[i];
if (ccType.validatePrefix(number)) {
return ccType.validateLength(number);
}
}
return false;
}
billing.getCcType = function(number) {
for (var i = 0; i < billing.ccTypes.length; ++i) {
var ccType = billing.ccTypes[i];
if (ccType.validatePrefix(number)) {
return ccType.type;
}
}
return false;
}
|
