File size: 3,601 Bytes
2fcec7b | 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 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 | // GPLv3 or later
// Copyright (c) 2015 Genome Research Limited
var isJSType = require('./isJSType'),
parseEMail = require('email-addresses');
// Convert subtype specification string into object
module.exports = (function() {
// Complex patterns
var is = {
regExp: function(type) {
var pattern = /^\/(.*)$/;
return (type.match(pattern) || [, false])[1];
},
mediaType: function(type) {
// per RFC6838
var pattern = /^[a-z0-9][a-z0-9!#$&^_.+-]{0,126}\/[a-z0-9][a-z0-9!#$&^_.+-]{0,126}$/i;
return pattern.test(type) && type;
}
};
// Standard patterns
['datetime', 'iri', 'email'].forEach(function(t) {
is[t] = function(type) { return type == t && type; };
});
// Subtype classifier
var classify = function(type) {
return type && Object.keys(is).reduce(function(a, t) {
return !a && is[t](type) !== false ? t : a;
}, undefined);
};
// Validation functions
var validate = {
// Validate by regular expression
regExp: function(pattern) {
var re = new RegExp(pattern);
return function(input) { return re.test(input); }
},
// Validate base64 encoded data
mediaType: function() {
var re = /^(?:[a-z0-9+/]{4})*(?:[a-z0-9+/]{2}==|[a-z0-9+/]{3}=)?$/i;
return function(input) { return re.test(input); }
},
// Validate ISO 8601 date-time per RFC3339
datetime: function() {
var fullDate = /^\d{4}-\d{2}-\d{2}$/,
fullTime = /^(\d{2}):(\d{2}):(\d{2})(?:\.\d+)?z[+-](\d{2}):(\d{2})$/i;
var between = function(x, a, b) {
return x >= a && x <= b;
};
var checkDate = function(input) {
// Check the format by regexp, but use JS to parse...
// That said, Date.parse is really bloody stupid: It will parse
// every month as having 31 days, then just add the difference
// to the next month! For example, 2000-02-31 = 2nd March 2000
return fullDate.test(input)
&& Date.parse(input) ? true : false;
};
var checkDateTime = function(input) {
// Check the time by regexp
var parts = input.split(/t/i),
match = (parts[1] || '').match(fullTime);
// $1 = hours
// $2 = minutes
// $3 = seconds
// $4 = hour offset
// $5 = minute offset
return checkDate(parts[0])
&& (match ? true : false)
&& between(parseInt(match[1], 10), 0, 23)
&& between(parseInt(match[2], 10), 0, 59)
&& between(parseInt(match[3], 10), 0, 59)
&& between(parseInt(match[4], 10), 0, 23)
&& between(parseInt(match[5], 10), 0, 59);
};
return function(input) {
return checkDate(input) || checkDateTime(input);
}
},
// Vacuously validate IRIs
// i.e., Any string could be an IRI, but we just mark it as such
// so that is has semantics that differ from free text
iri: function() { return function() { return true; } },
// Validate e-mails
email: function() {
return function(input) {
return parseEMail(input) ? true : false;
}
}
};
// Classify and Checker
return function(subtype) {
var output = {}
t = classify(subtype);
if (t) {
output.pattern = is[t](subtype);
output.test = function(x) {
return isJSType.string(x)
&& validate[t](output.pattern)(x);
}
} else {
// Vacuously validate free text (presuming it's a string)
output.test = isJSType.string;
}
return output;
};
})();
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