feat: add split_first_and_last_name helper

app/helpers/contact_helper.rb

@@ -0,0 +1,14 @@
+module ContactHelper
+  def split_first_and_last_name(full_name)
+    return { first_name: nil, last_name: nil } if full_name.nil?
+
+    # Remove extra spaces and split the name
+    names = full_name.squish.split
+
+    first_name = names.first || ''
+
+    last_name = names.drop(1).join(' ')
+
+    { first_name: first_name, last_name: last_name }
+  end
+end

spec/helpers/contact_helper_spec.rb

@@ -0,0 +1,47 @@
+require 'rails_helper'
+
+RSpec.describe ContactHelper do
+  describe '#split_first_and_last_name' do
+    it 'correctly splits a full name into first and last name' do
+      full_name = 'John Doe Smith'
+      expected_result = { first_name: 'John', last_name: 'Doe Smith' }
+      expect(helper.split_first_and_last_name(full_name)).to eq(expected_result)
+    end
+
+    it 'handles single-word names correctly' do
+      full_name = 'Cher'
+      expected_result = { first_name: 'Cher', last_name: '' }
+      expect(helper.split_first_and_last_name(full_name)).to eq(expected_result)
+    end
+
+    it 'handles an empty string correctly' do
+      full_name = ''
+      expected_result = { first_name: '', last_name: '' }
+      expect(helper.split_first_and_last_name(full_name)).to eq(expected_result)
+    end
+
+    it 'handles multiple consecutive spaces correctly' do
+      full_name = 'John    Doe Smith'
+      expected_result = { first_name: 'John', last_name: 'Doe Smith' }
+      expect(helper.split_first_and_last_name(full_name)).to eq(expected_result)
+    end
+
+    it 'returns nil for first and last name when input is nil' do
+      full_name = nil
+      expected_result = { first_name: nil, last_name: nil }
+      expect(helper.split_first_and_last_name(full_name)).to eq(expected_result)
+    end
+
+    it 'handles names with special characters correctly' do
+      full_name = 'John Doe-Smith'
+      expected_result = { first_name: 'John', last_name: 'Doe-Smith' }
+      expect(helper.split_first_and_last_name(full_name)).to eq(expected_result)
+    end
+
+    it 'handles non-Latin script names correctly' do
+      full_name = '李 小龙'
+      expected_result = { first_name: '李', last_name: '小龙' }
+      expect(helper.split_first_and_last_name(full_name)).to eq(expected_result)
+    end
+  end
+end