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* Resolve issue #59: Better message UUID generation and dupe checks

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This commit is contained in:
Bryan Ashby 2016-07-05 22:18:43 -06:00
parent 9e573e6810
commit f87e9917a0
4 changed files with 85 additions and 78 deletions
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43
core/ftn_util.js
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@ -4,10 +4,8 @@
let Config = require('./config.js').config;
let Address = require('./ftn_address.js');
let FNV1a = require('./fnv1a.js');
let createNamedUUID = require('./uuid_util.js').createNamedUUID;
let _ = require('lodash');
let assert = require('assert');
let iconv = require('iconv-lite');
let moment = require('moment');
let uuid = require('node-uuid');
@ -18,8 +16,6 @@ let packageJson = require('../package.json');
// :TODO: Remove "Ftn" from most of these -- it's implied in the module
exports.stringToNullPaddedBuffer = stringToNullPaddedBuffer;
exports.getMessageSerialNumber = getMessageSerialNumber;
exports.createMessageUuid = createMessageUuid;
exports.createMessageUuidAlternate = createMessageUuidAlternate;
exports.getDateFromFtnDateTime = getDateFromFtnDateTime;
exports.getDateTimeString = getDateTimeString;
@ -96,45 +92,6 @@ function getDateTimeString(m) {
return m.format('DD MMM YY HH:mm:ss');
}
//
// Create a v5 named UUID given a message ID ("MSGID") and
// FTN area tag ("AREA").
//
// This is similar to CrashMail
// See https://github.com/larsks/crashmail/blob/master/crashmail/dupe.c
//
function createMessageUuid(ftnMsgId, ftnArea) {
assert(_.isString(ftnMsgId));
assert(_.isString(ftnArea));
ftnMsgId = iconv.encode(ftnMsgId, 'CP437');
ftnArea = iconv.encode(ftnArea.toUpperCase(), 'CP437');
return uuid.unparse(createNamedUUID(ENIGMA_FTN_MSGID_NAMESPACE, Buffer.concat( [ ftnMsgId, ftnArea ] )));
};
//
// Create a v5 named UUID given a FTN area tag ("AREA"),
// create/modified date, subject, and message body
//
// This method should be used as a backup for when a MSGID is
// not available in which createMessageUuid() above should be
// used instead.
//
function createMessageUuidAlternate(ftnArea, modTimestamp, subject, msgBody) {
assert(_.isString(ftnArea));
assert(_.isDate(modTimestamp) || moment.isMoment(modTimestamp));
assert(_.isString(subject));
assert(_.isString(msgBody));
ftnArea = iconv.encode(ftnArea.toUpperCase(), 'CP437');
modTimestamp = iconv.encode(getDateTimeString(modTimestamp), 'CP437');
subject = iconv.encode(subject.toUpperCase().trim(), 'CP437');
msgBody = iconv.encode(msgBody.replace(/\r\n|[\n\v\f\r\x85\u2028\u2029]/g, '').trim(), 'CP437');
return uuid.unparse(createNamedUUID(ENIGMA_FTN_MSGID_NAMESPACE, Buffer.concat( [ ftnArea, modTimestamp, subject, msgBody ] )));
}
function getMessageSerialNumber(messageId) {
const msSinceEnigmaEpoc = (Date.now() - Date.UTC(2016, 1, 1));
const hash = Math.abs(new FNV1a(msSinceEnigmaEpoc + messageId).value).toString(16);