120 lines
2.9 KiB
JavaScript
120 lines
2.9 KiB
JavaScript
// Copyright 2011 Mark Cavage, Inc. All rights reserved.
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var assert = require('assert');
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var Attribute = require('./attribute');
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var Protocol = require('./protocol');
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///--- API
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function Change(options) {
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if (options) {
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if (typeof(options) !== 'object')
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throw new TypeError('options must be an object');
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if (options.operation && typeof(options.operation) !== 'string')
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throw new TypeError('options.operation must be a string');
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} else {
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options = {};
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}
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var self = this;
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this.__defineGetter__('operation', function() {
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switch (self._operation) {
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case 0x00: return 'add';
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case 0x01: return 'delete';
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case 0x02: return 'replace';
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default:
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throw new Error('0x' + self._operation.toString(16) + ' is invalid');
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}
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});
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this.__defineSetter__('operation', function(val) {
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if (typeof(val) !== 'string')
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throw new TypeError('operation must be a string');
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switch (val.toLowerCase()) {
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case 'add':
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self._operation = 0x00;
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break;
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case 'delete':
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self._operation = 0x01;
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break;
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case 'replace':
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self._operation = 0x02;
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break;
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default:
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throw new Error('Invalid operation type: 0x' + val.toString(16));
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}
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});
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this.__defineGetter__('modification', function() {
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return self._modification;
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});
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this.__defineSetter__('modification', function(attr) {
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if (Attribute.isAttribute(attr)) {
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self._modification = attr;
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return;
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}
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var keys = Object.keys(attr);
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if (keys.length > 1)
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throw new Error('Only one attribute per Change allowed');
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keys.forEach(function(k) {
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var _attr = new Attribute({type: k});
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if (Array.isArray(attr[k])) {
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attr[k].forEach(function(v) {
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_attr.addValue(v.toString());
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});
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} else {
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_attr.addValue(attr[k].toString());
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}
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self._modification = _attr;
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});
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});
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this.__defineGetter__('json', function() {
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return {
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operation: self.operation,
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modification: self._modification ? self._modification.json : {}
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};
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});
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this.operation = options.operation || options.type || 'add';
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this.modification = options.modification || {};
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}
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module.exports = Change;
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Change.compare = function(a, b) {
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if (!(a instanceof Change) || !(b instanceof Change))
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throw new TypeError('can only compare Changes');
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if (a.operation < b.operation) return -1;
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if (a.operation > b.operation) return 1;
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return Attribute.compare(a.modification, b.modification);
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};
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Change.prototype.parse = function(ber) {
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assert.ok(ber);
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ber.readSequence();
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this._operation = ber.readEnumeration();
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this._modification = new Attribute();
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this._modification.parse(ber);
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return true;
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};
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Change.prototype.toBer = function(ber) {
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assert.ok(ber);
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ber.startSequence();
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ber.writeEnumeration(this._operation);
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ber = this._modification.toBer(ber);
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ber.endSequence();
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return ber;
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};
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