Feat: Include previous messages in mention/assign notifications email (#3385)

app/drops/conversation_drop.rb

@@ -1,5 +1,17 @@
 class ConversationDrop < BaseDrop
+  include MessageFormatHelper
+
   def display_id
     @obj.try(:display_id)
   end
+
+  def recent_messages
+    @obj.try(:recent_messages).map do |message|
+      {
+        'sender' => message.sender&.available_name || message.sender&.name,
+        'content' => transform_user_mention_content(message.content),
+        'attachments' => message.attachments.map(&:file_url)
+      }
+    end
+  end
 end

app/models/conversation.rb

@@ -147,6 +147,10 @@ class Conversation < ApplicationRecord
     inbox.inbox_type == 'Twitter' && additional_attributes['type'] == 'tweet'
   end
 
+  def recent_messages
+    messages.chat.last(5)
+  end
+
   private
 
   def execute_after_update_commit_callbacks

app/views/mailers/agent_notifications/conversation_notifications_mailer/conversation_assignment.liquid

@@ -2,6 +2,30 @@
 
 <p>Time to save the world. A new conversation has been assigned to you</p>
 
+{% for chat_message in conversation.recent_messages %}
+  <div>
+    {% if chat_message.sender == user.available_name %}
+      <h4 style="margin: 0;">You</h4>
+    {% else %}
+      <h4 style="margin: 0;">{{chat_message.sender}}</h4>
+    {% endif %}
+  </div>
+
+  <div>
+    <p style="padding: 10px 20px; margin: 5px 0 20px 0; background: #F2F3F7; border-radius: 10px; display: inline-block; font-family: "Helvetica Neue",Tahoma,Arial,sans-serif; text-align: start; unicode-bidi: plaintext;">
+      {% if chat_message.content %}
+        {{chat_message.content}}
+      {% endif %}
+
+      {% if chat_message.attachments %}
+        {% for attachment in chat_message.attachments %}
+          Attachment [<a href="{{ attachment }}" _target="blank">Click here to view</a>]
+        {% endfor %}
+      {% endif %}
+    </p>
+  </div>
+{% endfor %}
+
 <p>
 Click <a href="{{action_url}}">here</a> to get cracking.
 </p>

app/views/mailers/agent_notifications/conversation_notifications_mailer/conversation_mention.liquid

@@ -5,4 +5,28 @@
   {{message.text_content}}
 </blockquote>
 
+{% for chat_message in conversation.recent_messages %}
+  <div>
+    {% if chat_message.sender == user.available_name %}
+      <h4 style="margin: 0;">You</h4>
+    {% else %}
+      <h4 style="margin: 0;">{{chat_message.sender}}</h4>
+    {% endif %}
+  </div>
+
+  <div>
+    <p style="padding: 10px 20px; margin: 5px 0 20px 0; background: #F2F3F7; border-radius: 10px; display: inline-block; font-family: "Helvetica Neue",Tahoma,Arial,sans-serif; text-align: start; unicode-bidi: plaintext;">
+      {% if chat_message.content %}
+        {{chat_message.content}}
+      {% endif %}
+
+      {% if chat_message.attachments %}
+        {% for attachment in chat_message.attachments %}
+          Attachment [<a href="{{ attachment }}" _target="blank">Click here to view</a>]
+        {% endfor %}
+      {% endif %}
+    </p>
+  </div>
+{% endfor %}
+
 <p><a href="{{ action_url }}">View Message</a></p>

spec/models/conversation_spec.rb

@@ -340,6 +340,30 @@ RSpec.describe Conversation, type: :model do
     end
   end
 
+  describe 'recent_messages' do
+    subject(:recent_messages) { conversation.recent_messages }
+
+    let(:conversation) { create(:conversation, agent_last_seen_at: 1.hour.ago) }
+    let(:message_params) do
+      {
+        conversation: conversation,
+        account: conversation.account,
+        inbox: conversation.inbox,
+        sender: conversation.assignee
+      }
+    end
+    let!(:messages) do
+      create_list(:message, 10, **message_params) do |message, i|
+        message.created_at = i.minute.ago
+      end
+    end
+
+    it 'returns upto 5 recent messages' do
+      expect(recent_messages.length).to be < 6
+      expect(recent_messages).to eq messages.last(5)
+    end
+  end
+
   describe 'unread_incoming_messages' do
     subject(:unread_incoming_messages) { conversation.unread_incoming_messages }