feat: Add filter APIs for Contacts and Conversations (#3264)

spec/services/contacts/filter_service_spec.rb

@@ -0,0 +1,56 @@
+require 'rails_helper'
+
+describe ::Contacts::FilterService do
+  subject(:filter_service) { described_class }
+
+  let!(:account) { create(:account) }
+  let!(:user_1) { create(:user, account: account) }
+  let!(:user_2) { create(:user, account: account) }
+  let!(:inbox) { create(:inbox, account: account, enable_auto_assignment: false) }
+  let!(:contact) { create(:contact, account: account, additional_attributes: { 'browser_language': 'en' }) }
+
+  before do
+    create(:inbox_member, user: user_1, inbox: inbox)
+    create(:inbox_member, user: user_2, inbox: inbox)
+    create(:conversation, account: account, inbox: inbox, assignee: user_1, contact: contact)
+    create(:conversation, account: account, inbox: inbox)
+    Current.account = account
+  end
+
+  describe '#perform' do
+    context 'with query present' do
+      let!(:params) { { payload: [], page: 1 } }
+      let(:payload) do
+        [
+          {
+            attribute_key: 'browser_language',
+            filter_operator: 'equal_to',
+            values: ['en'],
+            query_operator: nil
+          }.with_indifferent_access
+        ]
+      end
+
+      it 'filter contacts by additional_attributes' do
+        params[:payload] = payload
+        result = filter_service.new(params, user_1).perform
+        expect(result.length).to be 2
+      end
+
+      it 'filter conversations by tags' do
+        Contact.last.update_labels('support')
+        params[:payload] = [
+          {
+            attribute_key: 'labels',
+            filter_operator: 'equal_to',
+            values: [1],
+            query_operator: nil
+          }.with_indifferent_access
+        ]
+
+        result = filter_service.new(params, user_1).perform
+        expect(result.length).to be 2
+      end
+    end
+  end
+end