chore: Add Telemetry (#2631)

ref: https://www.chatwoot.com/docs/self-hosted/telemetry

spec/lib/chatwoot_hub_spec.rb

@@ -1,15 +1,71 @@
 require 'rails_helper'
 
 describe ChatwootHub do
-  it 'get latest version from chatwoot hub' do
-    version = '1.1.1'
-    allow(RestClient).to receive(:get).and_return({ version: version }.to_json)
-    expect(described_class.latest_version).to eq version
-    expect(RestClient).to have_received(:get).with(described_class::BASE_URL, { params: described_class.instance_config })
+  it 'generates installation identifier' do
+    installation_identifier = described_class.installation_identifier
+    expect(installation_identifier).not_to eq nil
+    expect(described_class.installation_identifier).to eq installation_identifier
   end
 
-  it 'returns nil when chatwoot hub is down' do
-    allow(RestClient).to receive(:get).and_raise(ExceptionList::REST_CLIENT_EXCEPTIONS.sample)
-    expect(described_class.latest_version).to eq nil
+  context 'when fetching latest_version' do
+    it 'get latest version from chatwoot hub' do
+      version = '1.1.1'
+      allow(RestClient).to receive(:post).and_return({ version: version }.to_json)
+      expect(described_class.latest_version).to eq version
+      expect(RestClient).to have_received(:post).with(described_class::PING_URL, described_class.instance_config
+        .merge(described_class.instance_metrics).to_json, { content_type: :json, accept: :json })
+    end
+
+    it 'will not send instance metrics when telemetry is disabled' do
+      version = '1.1.1'
+      ENV['DISABLE_TELEMETRY'] = 'true'
+      allow(RestClient).to receive(:post).and_return({ version: version }.to_json)
+      expect(described_class.latest_version).to eq version
+      expect(RestClient).to have_received(:post).with(described_class::PING_URL,
+                                                      described_class.instance_config.to_json, { content_type: :json, accept: :json })
+      ENV['DISABLE_TELEMETRY'] = nil
+    end
+
+    it 'returns nil when chatwoot hub is down' do
+      allow(RestClient).to receive(:post).and_raise(ExceptionList::REST_CLIENT_EXCEPTIONS.sample)
+      expect(described_class.latest_version).to eq nil
+    end
+  end
+
+  context 'when register instance' do
+    let(:company_name) { 'test' }
+    let(:owner_name) { 'test' }
+    let(:owner_email) { 'test@test.com' }
+
+    it 'sends info of registration' do
+      info = { company_name: company_name, owner_name: owner_name, owner_email: owner_email, subscribed_to_mailers: true }
+      allow(RestClient).to receive(:post)
+      described_class.register_instance(company_name, owner_name, owner_email)
+      expect(RestClient).to have_received(:post).with(described_class::REGISTRATION_URL,
+                                                      info.merge(described_class.instance_config).to_json, { content_type: :json, accept: :json })
+    end
+  end
+
+  context 'when sending events' do
+    let(:event_name) { 'sample_event' }
+    let(:event_data) { { 'sample_data' => 'sample_data' } }
+
+    it 'will send instance events' do
+      info = { event_name: event_name, event_data: event_data }
+      allow(RestClient).to receive(:post)
+      described_class.emit_event(event_name, event_data)
+      expect(RestClient).to have_received(:post).with(described_class::EVENTS_URL,
+                                                      info.merge(described_class.instance_config).to_json, { content_type: :json, accept: :json })
+    end
+
+    it 'will not send instance events when telemetry is disabled' do
+      ENV['DISABLE_TELEMETRY'] = 'true'
+      info = { event_name: event_name, event_data: event_data }
+      allow(RestClient).to receive(:post)
+      described_class.emit_event(event_name, event_data)
+      expect(RestClient).not_to have_received(:post).with(described_class::EVENTS_URL,
+                                                          info.merge(described_class.instance_config).to_json, { content_type: :json, accept: :json })
+      ENV['DISABLE_TELEMETRY'] = nil
+    end
   end
 end