node-ldapjs/lib/attribute.js

169 lines
3.6 KiB
JavaScript

// Copyright 2011 Mark Cavage, Inc. All rights reserved.
var assert = require('assert');
var asn1 = require('asn1');
var Protocol = require('./protocol');
///--- API
function Attribute(options) {
if (options) {
if (typeof (options) !== 'object')
throw new TypeError('options must be an object');
if (options.type && typeof (options.type) !== 'string')
throw new TypeError('options.type must be a string');
} else {
options = {};
}
var self = this;
this.type = options.type || '';
this._vals = [];
this.__defineGetter__('vals', function () {
var _vals = [];
self._vals.forEach(function (v) {
/* JSSTYLED */
if (/;binary$/.test(self.type)) {
_vals.push(v.toString('base64'));
} else {
_vals.push(v.toString('utf8'));
}
});
return _vals;
});
this.__defineSetter__('vals', function (vals) {
if (Array.isArray(vals)) {
vals.forEach(function (v) {
self.addValue(v);
});
} else {
self.addValue(vals);
}
});
this.__defineGetter__('buffers', function () {
return self._vals;
});
this.__defineGetter__('json', function () {
return {
type: self.type,
vals: self.vals
};
});
if (options.vals)
this.vals = options.vals;
}
module.exports = Attribute;
Attribute.prototype.addValue = function (val) {
if (Buffer.isBuffer(val)) {
this._vals.push(val);
} else {
var encoding = 'utf8';
/* JSSTYLED */
if (/;binary$/.test(this.type))
encoding = 'base64';
this._vals.push(new Buffer(val + '', encoding));
}
};
/* BEGIN JSSTYLED */
Attribute.compare = function compare(a, b) {
if (!(a instanceof Attribute) || !(b instanceof Attribute))
throw new TypeError('can only compare Attributes');
if (a.type < b.type) return -1;
if (a.type > b.type) return 1;
if (a.vals.length < b.vals.length) return -1;
if (a.vals.length > b.vals.length) return 1;
for (var i = 0; i < a.vals.length; i++) {
if (a.vals[i] < b.vals[i]) return -1;
if (a.vals[i] > b.vals[i]) return 1;
}
return 0;
};
/* END JSSTYLED */
Attribute.prototype.parse = function (ber) {
assert.ok(ber);
ber.readSequence();
this.type = ber.readString();
if (ber.peek() === Protocol.LBER_SET) {
if (ber.readSequence(Protocol.LBER_SET)) {
var end = ber.offset + ber.length;
while (ber.offset < end)
this._vals.push(ber.readString(asn1.Ber.OctetString, true));
}
}
return true;
};
Attribute.prototype.toBer = function (ber) {
assert.ok(ber);
ber.startSequence();
ber.writeString(this.type);
ber.startSequence(Protocol.LBER_SET);
if (this._vals.length) {
this._vals.forEach(function (b) {
ber.writeByte(asn1.Ber.OctetString);
ber.writeLength(b.length);
for (var i = 0; i < b.length; i++)
ber.writeByte(b[i]);
});
} else {
ber.writeStringArray([]);
}
ber.endSequence();
ber.endSequence();
return ber;
};
Attribute.toBer = function (attr, ber) {
return Attribute.prototype.toBer.call(attr, ber);
};
/* BEGIN JSSTYLED */
Attribute.isAttribute = function (attr) {
if (!attr) return false;
if (typeof (attr) !== 'object') return false;
if (attr instanceof Attribute) return true;
if (!attr.type || typeof (attr.type) !== 'string') return false;
if (!attr.vals || !Array.isArray(attr.vals)) return false;
for (var i = 0; i < attr.vals.length; i++) {
if (typeof (attr.vals[i]) !== 'string' && !Buffer.isBuffer(attr.vals[i]))
return false;
}
return true;
};
/* END JSSTLYED */
Attribute.prototype.toString = function () {
return JSON.stringify(this.json);
};