aa.liquid

{% assign is_self_referral_by_email = false %}
{% if advocate_info.email != blank and friend_info.email != blank %}
  {% assign is_similar = advocate_info.email | similar_to_email: friend_info.email %}
  {% assign plus_in_fr_email = friend_info.email | regexp_captures: '(\+[\d\w]+)?\@' %}
  {% assign plus_in_ad_email = advocate_info.email | regexp_captures: '(\+[\d\w]+)?\@' %}
  {% assign fr_email = friend_info.email | remove: plus_in_fr_email[0] %}
  {% assign ad_email = advocate_info.email | remove: plus_in_ad_email[0] %}
  {% if fr_email != blank and ad_email != blank %}
    {% if is_similar or fr_email == ad_email %}
      {% assign is_self_referral = true %}
      {% assign is_self_referral_by_email = true %}
    {% endif %}
  {% endif %}
{% endif %}

{% assign is_detect_by_fingerprint = false %}
{% if friend_custom_properties.fp_hash != blank and friend_custom_properties.fp_hash == advocate_custom_properties.fp_hash %}
  {% assign is_detect_by_fingerprint = true %}
{% endif %}

{% assign is_detect_by_facebook_id = false %}
{% if friend_custom_properties.fb_id != blank and friend_custom_properties.fb_id == advocate_custom_properties.fb_id %}
  {% assign is_detect_by_facebook_id = true %}
{% endif %}

{% assign is_self_referral_by_ip = false %}
{% if advocate_origin.ip.address and friend_offer.ip.address and advocate_origin.ip.address == friend_offer.ip.address %}
  {% assign is_self_referral_by_ip = true %}
{% endif %}

{% if is_detect_by_fingerprint %}
  block by fingerprint
{% elsif is_detect_by_facebook_id %}
  block by facebook id
{% elsif is_self_referral_by_ip %}
  block by IP
{% elsif is_self_referral_by_email %}
  block similar email
{% else %}
  true
{% endif %}