Fix: Added the backend validation for name (#3878)

- Added the backend validation for name
- Add message size constraint

spec/controllers/api/v1/accounts/contacts_controller_spec.rb

@@ -387,6 +387,18 @@ RSpec.describe 'Contacts API', type: :request do
         expect(json_response['payload']['contact']['custom_attributes']).to eq({ 'test' => 'test', 'test1' => 'test1' })
       end
 
+      it 'does not create the contact' do
+        valid_params[:contact][:name] = 'test' * 999
+
+        post "/api/v1/accounts/#{account.id}/contacts", headers: admin.create_new_auth_token,
+                                                        params: valid_params
+
+        expect(response).to have_http_status(:unprocessable_entity)
+
+        json_response = JSON.parse(response.body)
+        expect(json_response['message']).to eq('Name is too long (maximum is 255 characters)')
+      end
+
       it 'creates the contact inbox when inbox id is passed' do
         expect do
           post "/api/v1/accounts/#{account.id}/contacts", headers: admin.create_new_auth_token,

spec/controllers/api/v1/accounts/conversations/messages_controller_spec.rb

@@ -35,6 +35,21 @@ RSpec.describe 'Conversation Messages API', type: :request do
         expect(conversation.messages.first.content).to eq(params[:content])
       end
 
+      it 'does not create the message' do
+        params = { content: "#{'h' * 150 * 1000}a", private: true }
+
+        post api_v1_account_conversation_messages_url(account_id: account.id, conversation_id: conversation.display_id),
+             params: params,
+             headers: agent.create_new_auth_token,
+             as: :json
+
+        expect(response).to have_http_status(:unprocessable_entity)
+
+        json_response = JSON.parse(response.body)
+
+        expect(json_response['error']).to eq('Validation failed: Content is too long (maximum is 150000 characters)')
+      end
+
       it 'creates an outgoing text message with a specific bot sender' do
         agent_bot = create(:agent_bot)
         time_stamp = Time.now.utc.to_s