manager: add Mailjet emails to the sent emails list

app/lib/mailjet/api.rb

@@ -0,0 +1,37 @@
+class Mailjet::API
+  def properly_configured?
+    [Mailjet.config.api_key, Mailjet.config.secret_key].all?(&:present?)
+  end
+
+  # Get messages sent to a user through SendInBlue.
+  #
+  # Returns an array of SentMail objects.
+  def sent_mails(email_address)
+    contact = Mailjet::Contact.find(email_address)
+    if contact.nil?
+      Rails.logger.info "Mailjet::API: no contact found for email address '#{email_address}'"
+      return []
+    end
+
+    messages = Mailjet::Message.all(
+      contact: contact.attributes['id'],
+      from_ts: 30.days.ago.to_datetime.rfc3339,
+      show_subject: true
+    )
+
+    messages.map do |message|
+      SentMail.new(
+        from: nil,
+        to: email_address,
+        subject: message.attributes['subject'],
+        delivered_at: message.attributes['arrived_at'],
+        status: message.attributes['status'],
+        service_name: 'Mailjet',
+        external_url: 'https://app.mailjet.com/contacts/subscribers/contact_list'
+      )
+    end
+  rescue Mailjet::ApiError => e
+    Rails.logger.error e.message
+    []
+  end
+end