Split fromEmail into local part and domain substitution variables

setDynamicFromReplyTo.js

'use strict';

/*
 * Update a SparkPost template to use substitution variables
 * in content.from.name, content.from.email and content.reply_to
 *
 * Usage: node setDynamicFromReplyTo.js <API KEY> <template ID>
 *
 * Note: your API KEY must have template write privileges.
 *
 */

var SparkPost = require('sparkpost')
  , key = process.argv[2]
  , templateID = process.argv[3]
  , client = new SparkPost(key)
  , sampleTrans = {
      recipients: ['...'],
      content: {
        template_id: ""
      },
      substitution_data: {
        fromName: "Your Name",
        fromEmailLocalPart: "you",
        fromEmailDomain: "yourdomain.com",
        replyTo: "youagain@yourotherdomain.com"
      }
  };

function msg(s) {
  console.log(s);
}

function err(s) {
  console.log('Error: ' + s);
}

msg('Extracting template: ' + templateID + ' ...');
client.templates.find({id: templateID}, function(error, res) {
  if (error) {
    err("Unable to fetch template named " + templateID);
    err(error);
  } else {
    msg('Template extracted.  Updating fields: ');
    msg('\tcontent.from.name = "{{fromName}}"');
    msg('\tcontent.from.email = "{{fromEmailLocalPart}}@{{fromEmailDomain}}"');
    msg('\tcontent.reply_to = "{{replyTo}}"');
    var tpl;
    try {
      tpl = JSON.parse(res.body).results;
    } catch(e) {
      err('Failed to parse template JSON');
      err(e);
      return;
    }

    tpl.content.from = {
      name: '{{fromName}}',
      email: '{{fromEmailLocalPart}}@{{fromEmailDomain}}'
    };
    tpl.content.reply_to = '{{replyTo}}';

    msg('Saving...');
    client.templates.update({
      template: tpl
    }, function(error, res) {
      if (error) {
        err('Failed to save updated template');
        err(error);
      } else {
        msg('Template updated!\n');
        msg('You can use use this template with custom from and reply to addresses with a transmission like this:');
        sampleTrans.content.template_id = templateID;
        msg(JSON.stringify(sampleTrans, null, '  '));
        msg('\nNote: your fromEmail domain must be a valid sending domain within SparkPost');
      }
    });
  }
});