feat: Add support for Whatsapp template messages in the UI (#4711)

Co-authored-by: Pranav Raj S <pranav@chatwoot.com>

spec/services/whatsapp/send_on_whatsapp_service_spec.rb

@@ -1,6 +1,13 @@
 require 'rails_helper'
 
 describe Whatsapp::SendOnWhatsappService do
+  template_params = {
+    name: 'sample_shipping_confirmation',
+    namespace: '23423423_2342423_324234234_2343224',
+    language: 'en_US',
+    processed_params: { '1' => '3' }
+  }
+
   describe '#perform' do
     before do
       stub_request(:post, 'https://waba.360dialog.io/v1/configs/webhook')
@@ -54,6 +61,30 @@ describe Whatsapp::SendOnWhatsappService do
         expect(message.reload.source_id).to eq('123456789')
       end
 
+      it 'calls channel.send_template if template_params are present' do
+        message = create(:message, additional_attributes: { template_params: template_params },
+                                   content: 'Your package will be delivered in 3 business days.', conversation: conversation, message_type: :outgoing)
+        allow(HTTParty).to receive(:post).and_return(whatsapp_request)
+        allow(whatsapp_request).to receive(:success?).and_return(true)
+        allow(whatsapp_request).to receive(:[]).with('messages').and_return([{ 'id' => '123456789' }])
+        expect(HTTParty).to receive(:post).with(
+          'https://waba.360dialog.io/v1/messages',
+          headers: { 'D360-API-KEY' => 'test_key', 'Content-Type' => 'application/json' },
+          body: {
+            to: '123456789',
+            template: {
+              name: 'sample_shipping_confirmation',
+              namespace: '23423423_2342423_324234234_2343224',
+              language: { 'policy': 'deterministic', 'code': 'en_US' },
+              components: [{ 'type': 'body', 'parameters': [{ 'type': 'text', 'text': '3' }] }]
+            },
+            type: 'template'
+          }.to_json
+        )
+        described_class.new(message: message).perform
+        expect(message.reload.source_id).to eq('123456789')
+      end
+
       it 'calls channel.send_template when template has regexp characters' do
         message = create(
           :message,