feat: Line Channel (#2904)

- Ability to configure line bots as a channel in chatwoot
- Receive a message sent to the line bot in chatwoot
- Ability to reply to line users from chatwoot

fixes: #2738

spec/services/line/incoming_message_service_spec.rb

@@ -0,0 +1,59 @@
+require 'rails_helper'
+
+describe Line::IncomingMessageService do
+  let!(:line_channel) { create(:channel_line) }
+  let(:params) do
+    {
+      'destination': '2342234234',
+      'events': [
+        {
+          'replyToken': '0f3779fba3b349968c5d07db31eab56f',
+          'type': 'message',
+          'mode': 'active',
+          'timestamp': 1_462_629_479_859,
+          'source': {
+            'type': 'user',
+            'userId': 'U4af4980629'
+          },
+          'message': {
+            'id': '325708',
+            'type': 'text',
+            'text': 'Hello, world'
+          }
+        },
+        {
+          'replyToken': '8cf9239d56244f4197887e939187e19e',
+          'type': 'follow',
+          'mode': 'active',
+          'timestamp': 1_462_629_479_859,
+          'source': {
+            'type': 'user',
+            'userId': 'U4af4980629'
+          }
+        }
+      ]
+    }.with_indifferent_access
+  end
+
+  describe '#perform' do
+    context 'when valid text message params' do
+      it 'creates appropriate conversations, message and contacts' do
+        line_bot = double
+        line_user_profile = double
+        allow(Line::Bot::Client).to receive(:new).and_return(line_bot)
+        allow(line_bot).to receive(:get_profile).and_return(line_user_profile)
+        allow(line_user_profile).to receive(:body).and_return(
+          {
+            'displayName': 'LINE Test',
+            'userId': 'U4af4980629',
+            'pictureUrl': 'https://test.com'
+          }.to_json
+        )
+        described_class.new(inbox: line_channel.inbox, params: params).perform
+        expect(line_channel.inbox.conversations).not_to eq(0)
+        expect(Contact.all.first.name).to eq('LINE Test')
+        expect(line_channel.inbox.messages.first.content).to eq('Hello, world')
+      end
+    end
+  end
+end

spec/services/line/send_on_line_service_spec.rb

@@ -0,0 +1,18 @@
+require 'rails_helper'
+
+describe Line::SendOnLineService do
+  describe '#perform' do
+    context 'when a valid message' do
+      it 'calls @channel.client.push_message' do
+        line_client = double
+        line_channel = create(:channel_line)
+        message = create(:message, message_type: :outgoing, content: 'test',
+                                   conversation: create(:conversation, inbox: line_channel.inbox))
+        allow(line_client).to receive(:push_message)
+        allow(Line::Bot::Client).to receive(:new).and_return(line_client)
+        expect(line_client).to receive(:push_message)
+        described_class.new(message: message).perform
+      end
+    end
+  end
+end