Function: fixEmailDomains

Enterprise Edition

Goal: Redact Sensitive Data prior to sharing.

This function fixEmailDomains will fix email domains by ensuring only a top level domain is used.
Example given an Email address like jack.smith@mailhost.company.com we update it to use only the top level domain jack.smith@company.com.
Requires a metadata bucket and a source bucket, and a source bucket aliased to "src_bkt" in mode read+write.
Will operate on all documents where doc.type === "employees".

fixEmailDomains
Input Data/Mutation
Output Data/Mutation

function fixEmailDomain(doc,fieldname,emaildomain) {
    /*
    * doc:         the mutated document
    * fieldname:   the name of the email field in "doc" to update
    * emaildomain: the domain to use, for example @mycompany.com
    */
    if (emaildomain.charAt(0) !== '@') return false;
    var domary = emaildomain.substr(1).split(".");
    var re = new RegExp('@.+?\.' + domary[0] +  '\.' + domary[1] + '$');
    if (re.test(doc[fieldname])) {
        var tmp = doc[fieldname].replace(re, emaildomain);
        doc[fieldname] = tmp;
        return true;
    }
    return false;
}

function OnUpdate(doc, meta) {
    if (doc.type !== "employees") return;

    // normalize email addresses
    if (fixEmailDomain(doc,'email',"@bigmovies.com")) {
        try {
            log('OnUpdate: updated field email',doc.email);
            src_bkt[meta.id] = doc;
        } catch (e) {
            log('OnUpdate: error',e);
        }
    }
}

INPUT: KEY employees::1001

{
  "type": "employees",
  "id": 1001,
  "email": "will.smith@mailhost.bigmovies.com"
}

UPDATED/OUTPUT: KEY employees::1001

{
  "type": "employees",
  "id": 1001,
  "email": "will.smith@bigmovies.com"
}