Scriptable script that imports contacts from Slack. Existing contacts will also have their avatar and social profiles updated. The contacts must have their phone number set in Slack.

Import Contacts from Slack.js

// In order to use the script,
// you must create a Slack bot
// with the user:read scope and
// generate an accesss token.
// The script will prompt you
// to copy the access token in.
// The token is stored securely
// in the keychain.
let containers = await ContactsContainer.all()
let contacts = await Contact.all(containers)
let users = await loadSlackUsers()
for (user of users) {
  let profile = user["profile"]
  let phone = trimPhone(profile["phone"])
  if (phone.length <= 0) {
    continue
  }
  let contact = contacts.find(e => {
    return e.phoneNumbers
      .filter(p => trimPhone(p.value) == phone)
      .length > 0
  })
  let firstName = profile["first_name"]
  if (firstName == null) {
    continue
  }
  if (contact == null) {
    let lastName = profile["last_name"]
    contact = new Contact()
    contact.givenName = firstName
    contact.familyName = lastName
    contact.phoneNumbers = [{
      "label": "Work",
      "value": phone
    }]
    await update(contact, user)
    Contact.add(contact)
    log("Added " + firstName)
  } else {
    await update(contact, user)
    Contact.update(contact)
    log("Updated " + firstName)
  }
}
Contact.persistChanges()

async function update(contact, user) {
  contact.image = await image(contact, user)
  contact.socialProfiles = socialProfiles(contact, user)
}

function socialProfiles(contact, user) {
  let all = contact.socialProfiles || []
  let idx = all.findIndex(e => {
    return e["label"] == "Slack"
  })
  let url = "slack://user?team="
    + user["team_id"]
    + "&id=" + user["id"]
  let entry = {
    "label": "Slack",
    "service": "Slack",
    "username": user["name"],
    "url": url
  }
  if (idx != -1) {
    all[idx] = entry
  } else {
    all.push(entry)
  }
  return all
}

async function image(contact, user) {
  let profile = user["profile"]
  let imgURL = profile["image_192"]
  let imgReq = new Request(imgURL)
  return await imgReq.loadImage()
}

async function loadSlackUsers() {
  let token = await getToken()
  let baseURL = "https://slack.com/api/users.list"
  let url = baseURL + "?token=" + token
  let req = new Request(url)
  let json = await req.loadJSON()
  let users = json["members"]
  return users
}

async function getToken() {
  let key = "import_contacts.slack.token"
  if (Keychain.contains(key)) {
    return Keychain.get(key)
  } else {
    let alert = new Alert()
    alert.title = "Paste access token"
    alert.message = "Create a Slack bot with the users:read scope, generate an access token and copy it here."
    alert.addTextField("Token")
    alert.addAction("Save in keychain")
    alert.addCancelAction("Cancel")
    let idx = await alert.present()
    if (idx == -1) {
      return null
    }
    let val = alert.textFieldValue(0)
    if (val != null && val.length > 0) {
      Keychain.set(key, val)
      return val
    } else {
      return null
    }
  }
}

function trimPhone(phone) {
  let result = phone
  result = result.replace(/ /g, "")
  if (result.startsWith("+45")) {
    return result.slice(3)
  } else {
    return result
  }
}