extension-email-marketing

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---
name: extension-email-marketing
description: Send personalised marketing emails to subscribers with an unsubscribe link.
version: 0.1.6
compatibility:
  mops:
    caffeineai-email-marketing: "~0.1.1"
    caffeineai-authorization: "~1.0.1"
    caffeineai-email-verification: "~0.1.1"
caffeineai-subscription: [plus, pro]
---

# Email — Marketing
Marketing email extension for [Caffeine AI](https://caffeine.ai?utm_source=caffeine-skill&utm_medium=referral).

## Overview

This skill adds direct marketing email support with subscriber management, topic-based subscriptions, and automatic unsubscribe links. Requires email verification before users can receive marketing emails.

# Backend

## This component is for sending direct marketing emails and managing subscribers to marketing topics.

- Users MUST have verified their email address AND MUST be subscribed to a marketing topic before they can receive marketing emails on that topic
- Marketing emails MUST contain an unsubscribe link which will unsubscribe the user from the given topic
- This component depends on the [extension-email-verification](../extension-email-verification/SKILL.md) for verifying email addresses, be sure to check that too.

### To subscribe users to marketing topics and manage lists of subscribers

- Use the prefabricated module `mo:caffeineai-email-marketing/subscribers.mo` which cannot be modified.
- Marketing email subscribers MUST be handled solely through this subscribers module
- Do NOT also store a subscribed status against user profiles

```mo:caffeineai-email-marketing/subscribers.mo
module {
  public type State = {
    var topics : Map.Map<Nat, TopicRecord>;
    var topicsByName : Map.Map<Text, Nat>;
  };

  // Add a new topic by name or get an existing topic if it already exists. Returns the topic ID.
  public func addTopic(state : State, name : Text) : Nat;

  // Rename a topic. Returns false if a topic with the new name already exists or the topic ID does not exist.
  public func renameTopic(state : State, topicId : Nat, newName : Text) : Bool;

  // Remove a topic. Also removes all subscribers from that topic.
  public func removeTopic(state : State, topicId : Nat);

  // List all topics (id, name).
  public func listTopics(state : State) : [Topic];

  // Get a topic ID by name
  public func getTopicId(state : State, name : Text) : ?Nat;

  // Get a topic name by ID
  public func getTopicName(state : State, topicId : Nat) : ?Text;

  // Add a subscriber to a topic. Returns false if the topic doesn't exist
  public func add(state : State, topicId : Nat, email : Text) : Bool;

  // Remove a subscriber from a topic
  public func remove(state : State, topicId : Nat, email : Text);

  // Remove a subscriber from all topics
  public func removeFromAllTopics(state : State, email : Text);

  // List all subscribers alongside their verification status for a given topic. Returns null if the topic doesn't exist.
  public func list(state : State, verifiedEmails : VerifiedEmails.State, topicId : Nat) : ?[(Text, Bool)];

  // List all verified subscribers for a given topic. Returns null if the topic doesn't exist.
  public func verified(state : State, verifiedEmails : VerifiedEmails.State, topicId : Nat) : ?[Text];

  // Return whether a subscriber is subscribed to a topic
  public func isSubscribed(state : State, topicId : Nat, email : Text) : Bool;

  // List all topics a subscriber is subscribed to.
  public func listTopicsForSubscriber(state : State, email : Text) : [Topic];

  // Returns the count of subscribers for a given topic
  public func count(state : State, topicId : Nat) : Nat;

  // Returns the count of verified subscribers for a given topic
  public func verifiedCount(state : State, verifiedEmails : VerifiedEmails.State, topicId : Nat) : Nat;
};
```

### To handle the unsubscribe link

Use the prefabricated module `caffeineai-email-marketing/unsubscribeMixin.mo` which cannot be modified.

The MixinEmailUnsubscribe module handles calls to the u