Mailspring/packages/nylas-message-processor/processors/contact.js

class ContactProcessor {

  verified(contact) {
    // some suggestions: http://stackoverflow.com/questions/6317714/apache-camel-mail-to-identify-auto-generated-messages
    const regex = new RegExp(/^(noreply|no-reply|donotreply|mailer|support|webmaster|news(letter)?@)/ig)

    if (!contact.email) {
      return false;
    }
    if (regex.test(contact.email) || contact.email.length > 60) {
      return false
    }
    return true
  }

  processMessage({db, message}) {
    const {Contact} = db;

    let allContacts = []
    const fields = ['to', 'from', 'bcc', 'cc']
    fields.forEach((field) => {
      allContacts = allContacts.concat(message[field])
    })

    const upserts = allContacts.filter(this.verified).map((contact) =>
      Contact.upsert({
        name: contact.name,
        email: contact.email,
        accountId: message.accountId,
      })
    )

    return Promise.all(upserts)
    .then(() => {
      return message
    })
  }
}

const processor = new ContactProcessor()

module.exports = {
  order: 3,
  processMessage: processor.processMessage.bind(processor),
}