Subj : RE: Dupe Detection
To   : nugax
From : NuSkooler
Date : Thu Oct 13 2022 10:33 am


On Thursday, October 13th nugax was heard saying...
Nu> Hello All, So I need to write some duplication detection in echomail. My
Nu> question is: Do you use MSG ID identifier, parse the actual msg body, or
Nu> some other way to determine if a message is duplicated?

Yep, use MSGID if present. In enigma, imported messages also get a named UUID assigned (which must be unique) based on the following code:

static createMessageUUID(areaTag, modTimestamp, subject, body) {
       assert(_.isString(areaTag));
       assert(_.isDate(modTimestamp) || moment.isMoment(modTimestamp));
       assert(_.isString(subject));
       assert(_.isString(body));

       if (!moment.isMoment(modTimestamp)) {
           modTimestamp = moment(modTimestamp);
       }

       areaTag = iconvEncode(areaTag.toUpperCase(), 'CP437');
       modTimestamp = iconvEncode(modTimestamp.format('DD MMM YY  HH:mm:ss'), 'CP437');
       subject = iconvEncode(subject.toUpperCase().trim(), 'CP437');
       body = iconvEncode(
           body.replace(/\r\n|[\n\v\f\r\x85\u2028\u2029]/g, '').trim(),
           'CP437'
       );

       return uuidParse.unparse(
           createNamedUUID(
               ENIGMA_MESSAGE_UUID_NAMESPACE,
               Buffer.concat([areaTag, modTimestamp, subject, body])
           )
       );
   }


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