chore: Whatsapp templates fix for 360 dialog (#3479)

Fixes: #3426

app/models/channel/whatsapp.rb

@@ -2,13 +2,15 @@
 #
 # Table name: channel_whatsapp
 #
-#  id              :bigint           not null, primary key
-#  phone_number    :string           not null
-#  provider        :string           default("default")
-#  provider_config :jsonb
-#  created_at      :datetime         not null
-#  updated_at      :datetime         not null
-#  account_id      :integer          not null
+#  id                             :bigint           not null, primary key
+#  message_templates              :jsonb
+#  message_templates_last_updated :datetime
+#  phone_number                   :string           not null
+#  provider                       :string           default("default")
+#  provider_config                :jsonb
+#  created_at                     :datetime         not null
+#  updated_at                     :datetime         not null
+#  account_id                     :integer          not null
 #
 # Indexes
 #
@@ -43,6 +45,10 @@ class Channel::Whatsapp < ApplicationRecord
     end
   end
 
+  def send_template(phone_number, template_info)
+    send_template_message(phone_number, template_info)
+  end
+
   def media_url(media_id)
     "#{api_base_path}/media/#{media_id}"
   end
@@ -55,27 +61,34 @@ class Channel::Whatsapp < ApplicationRecord
     true
   end
 
+  def message_templates
+    sync_templates
+    super
+  end
+
   private
 
   def send_text_message(phone_number, message)
-    HTTParty.post(
+    response = HTTParty.post(
       "#{api_base_path}/messages",
-      headers: { 'D360-API-KEY': provider_config['api_key'], 'Content-Type': 'application/json' },
+      headers: api_headers,
       body: {
         to: phone_number,
         text: { body: message.content },
         type: 'text'
       }.to_json
     )
+
+    response.success? ? response['messages'].first['id'] : nil
   end
 
   def send_attachment_message(phone_number, message)
     attachment = message.attachments.first
     type = %w[image audio video].include?(attachment.file_type) ? attachment.file_type : 'document'
     attachment_url = attachment.file_url
-    HTTParty.post(
+    response = HTTParty.post(
       "#{api_base_path}/messages",
-      headers: { 'D360-API-KEY': provider_config['api_key'], 'Content-Type': 'application/json' },
+      headers: api_headers,
       body: {
         'to' => phone_number,
         'type' => type,
@@ -85,6 +98,46 @@ class Channel::Whatsapp < ApplicationRecord
         }
       }.to_json
     )
+
+    response.success? ? response['messages'].first['id'] : nil
+  end
+
+  def send_template_message(phone_number, template_info)
+    response = HTTParty.post(
+      "#{api_base_path}/messages",
+      headers: api_headers,
+      body: {
+        to: phone_number,
+        template: template_body_parameters(template_info),
+        type: 'template'
+      }.to_json
+    )
+
+    response.success? ? response['messages'].first['id'] : nil
+  end
+
+  def template_body_parameters(template_info)
+    {
+      name: template_info[:name],
+      namespace: template_info[:namespace],
+      language: {
+        policy: 'deterministic',
+        code: template_info[:lang_code]
+      },
+      components: [{
+        type: 'body',
+        parameters: template_info[:parameters]
+      }]
+    }
+  end
+
+  def sync_templates
+    # to prevent too many api calls
+    last_updated = message_templates_last_updated || 1.day.ago
+    return if Time.current < (last_updated + 12.hours)
+
+    response = HTTParty.get("#{api_base_path}/configs/templates", headers: api_headers)
+    update(message_templates: response['waba_templates'], message_templates_last_updated: Time.now.utc) if response.success?
   end
 
   # Extract later into provider Service