chore: add whatsapp typing indicators

app/models/channel/whatsapp.rb

@@ -54,6 +54,7 @@ class Channel::Whatsapp < ApplicationRecord
 
   delegate :send_message, to: :provider_service
   delegate :send_template, to: :provider_service
+  delegate :send_typing_indicator, to: :provider_service
   delegate :sync_templates, to: :provider_service
   delegate :media_url, to: :provider_service
   delegate :api_headers, to: :provider_service

app/services/conversations/typing_status_manager.rb

@@ -18,9 +18,22 @@ class Conversations::TypingStatusManager
     case params[:typing_status]
     when 'on'
       trigger_typing_event(CONVERSATION_TYPING_ON, params[:is_private])
+      send_whatsapp_typing_indicator if conversation.inbox.whatsapp? && conversation.inbox.channel.provider == 'whatsapp_cloud'
     when 'off'
       trigger_typing_event(CONVERSATION_TYPING_OFF, params[:is_private])
     end
     # Return the head :ok response from the controller
   end
+
+  private
+
+  def send_whatsapp_typing_indicator
+    last_incoming_message = @conversation.messages&.incoming&.last
+    return if last_incoming_message.blank?
+
+    conversation.inbox.channel.send_typing_indicator(
+      last_incoming_message.conversation.contact_inbox.source_id,
+      last_incoming_message.source_id
+    )
+  end
 end

app/services/whatsapp/providers/base_service.rb

@@ -23,6 +23,10 @@ class Whatsapp::Providers::BaseService
     raise 'Overwrite this method in child class'
   end
 
+  def send_typing_indicator(_phone_number, _message_id)
+    raise 'Overwrite this method in child class'
+  end
+
   def validate_provider_config
     raise 'Overwrite this method in child class'
   end

app/services/whatsapp/providers/whatsapp_cloud_service.rb

@@ -157,4 +157,21 @@ class Whatsapp::Providers::WhatsappCloudService < Whatsapp::Providers::BaseServi
 
     process_response(response)
   end
+
+  def send_typing_indicator(_phone_number, message_id)
+    response = HTTParty.post(
+      "#{phone_id_path}/messages",
+      headers: api_headers,
+      body: {
+        messaging_product: 'whatsapp',
+        status: 'read',
+        message_id: message_id,
+        typing_indicator: {
+          type: 'text'
+        }
+      }.to_json
+    )
+
+    process_response(response)
+  end
 end