AnalyticsHelper.rb

require 'mixpanel-ruby'

class AnalyticsHelper
    def initialize
        @@tracker = Mixpanel::Tracker.new Rails.application.secrets.mixpanel_token
    end

    def track user_id, action, properties=nil
        Rails.logger.debug "Tracking: #{action}"
        @@tracker.track(user_id, action, properties || {})
    end

# => USER
    def user_registered user, label="User Registered"
        log "User registered: #{user.email}"

        self.update_user user

        self.track user.id, label
    end

    def user_profile_changed user, label="User Profile Updated"
        log "User profile changed: #{user.email}"

        self.update_user user
        self.track user.id, label
    end

    def user_signed_in user, label="User Signed In"
        log "User signed in: #{user.email}"

        @@tracker.people.set(user.id, {
            'Logins' => user.sign_in_count,
            '$first_name' => user.first_name, # these fields are here for pre-analytics users
            '$last_name' => user.last_name,
            '$email' => user.email
        })

        @@tracker.people.set_once(user.id, {
            '$created' => user.created_at
        })

        self.track user.id, label
    end

# => Utility
    def log message
        Rails.logger.debug "ANALYTICS: #{message}"
    end

protected
    def update_user user
        log "Updating User: #{user.email}"

        @@tracker.people.set(user.id, {
            '$first_name' => user.first_name,
            '$last_name' => user.last_name,
            '$email' => user.email,
            '$created' => user.created_at,
            'account_id' => user.account_id,
        })
    end
end