feat: Support sending and receiving attachments in Slack Integration (#3022)

- Process incoming slack attachments
- Send attachments from chatwoot to slack

spec/lib/integrations/slack/incoming_message_builder_spec.rb

@@ -3,6 +3,7 @@ require 'rails_helper'
 describe Integrations::Slack::IncomingMessageBuilder do
   let(:account) { create(:account) }
   let(:message_params) { slack_message_stub }
+  let(:message_with_attachments) { slack_attachment_stub }
   let(:message_without_thread_ts) { slack_message_stub_without_thread_ts }
   let(:verification_params) { slack_url_verification_stub }
 
@@ -51,6 +52,17 @@ describe Integrations::Slack::IncomingMessageBuilder do
         builder.perform
         expect(conversation.messages.count).to eql(messages_count)
       end
+
+      it 'saves attachment if params files present' do
+        expect(hook).not_to eq nil
+        messages_count = conversation.messages.count
+        builder = described_class.new(message_with_attachments)
+        allow(builder).to receive(:sender).and_return(nil)
+        builder.perform
+        expect(conversation.messages.count).to eql(messages_count + 1)
+        expect(conversation.messages.last.content).to eql('this is test https://chatwoot.com Hey @Sojan Test again')
+        expect(conversation.messages.last.attachments).to be_any
+      end
     end
   end
 end

spec/lib/integrations/slack/send_on_slack_service_spec.rb

@@ -9,6 +9,7 @@ describe Integrations::Slack::SendOnSlackService do
     create(:message, account: conversation.account, inbox: conversation.inbox, conversation: conversation)
   end
   let(:slack_message) { double }
+  let(:file_attachment) { double }
   let(:slack_message_content) { double }
   let(:slack_client) { double }
   let(:builder) { described_class.new(message: message, hook: hook) }
@@ -58,6 +59,36 @@ describe Integrations::Slack::SendOnSlackService do
         expect(message.external_source_id_slack).to eq 'cw-origin-6789.12345'
       end
 
+      it 'sent attachment on slack' do
+        expect(slack_client).to receive(:chat_postMessage).with(
+          channel: hook.reference_id,
+          text: message.content,
+          username: "Contact: #{message.sender.name}",
+          thread_ts: conversation.identifier,
+          icon_url: anything
+        ).and_return(slack_message)
+
+        attachment = message.attachments.new(account_id: message.account_id, file_type: :image)
+        attachment.file.attach(io: File.open(Rails.root.join('spec/assets/avatar.png')), filename: 'avatar.png', content_type: 'image/png')
+
+        expect(slack_client).to receive(:files_upload).with(
+          channels: hook.reference_id,
+          initial_comment: 'Attached File!',
+          content: anything,
+          filename: attachment.file.filename,
+          filetype: 'png',
+          thread_ts: conversation.identifier,
+          title: anything
+        ).and_return(file_attachment)
+
+        message.save!
+
+        builder.perform
+
+        expect(message.external_source_id_slack).to eq 'cw-origin-6789.12345'
+        expect(message.attachments).to be_any
+      end
+
       it 'disables hook on Slack AccountInactive error' do
         expect(slack_client).to receive(:chat_postMessage).with(
           channel: hook.reference_id,

spec/support/slack_stubs.rb

@@ -21,6 +21,20 @@ module SlackStubs
     }
   end
 
+  def slack_attachment_stub
+    {
+      token: '[FILTERED]',
+      team_id: 'TLST3048H',
+      api_app_id: 'A012S5UETV4',
+      event: message_event,
+      type: 'event_callback',
+      event_id: 'Ev013QUX3WV6',
+      event_time: 1_588_623_033,
+      authed_users: '[FILTERED]',
+      webhook: {}
+    }
+  end
+
   def slack_message_stub_without_thread_ts
     {
       token: '[FILTERED]',
@@ -52,6 +66,7 @@ module SlackStubs
       ts: '1588623033.006000',
       team: 'TLST3048H',
       blocks: message_blocks,
+      files: file_stub,
       thread_ts: '1588623023.005900',
       channel: 'G01354F6A6Q',
       event_ts: '1588623033.006000',
@@ -59,6 +74,19 @@ module SlackStubs
     }
   end
 
+  def file_stub
+    [
+      {
+        mimetype: 'image/png',
+        url_private: 'https://via.placeholder.com/250x250.png',
+        name: 'name_of_the_file',
+        title: 'title_of_the_file',
+        filetype: 'png',
+        url_private_download: 'https://via.placeholder.com/250x250.png'
+      }
+    ]
+  end
+
   def message_blocks
     [
       {