Use generic ‘conversations’ API endpoint to enable transcripts for slack IMs and groups

lib/discourse_chat/provider/slack/slack_transcript.rb

@@ -201,12 +201,12 @@ module DiscourseChat::Provider::SlackProvider
       http = Net::HTTP.new("slack.com", 443)
       http.use_ssl = true
 
-      req = Net::HTTP::Post.new(URI('https://slack.com/api/channels.history'))
+      req = Net::HTTP::Post.new(URI('https://slack.com/api/conversations.history'))
 
       data = {
         token: SiteSetting.chat_integration_slack_access_token,
         channel: @channel_id,
-        count: count
+        limit: count
       }
 
       req.set_form_data(data)

spec/lib/discourse_chat/provider/slack/slack_command_controller_spec.rb

@@ -196,7 +196,7 @@ describe 'Slack Command Controller', type: :request do
         context "with valid slack responses" do
           before do
             stub_request(:post, "https://slack.com/api/users.list").to_return(body: '{"ok":true,"members":[{"id":"U5Z773QLS","name":"david","profile":{"icon_24":"https://example.com/avatar"}}]}')
-            stub_request(:post, "https://slack.com/api/channels.history").to_return(body: { ok: true, messages: messages_fixture }.to_json)
+            stub_request(:post, "https://slack.com/api/conversations.history").to_return(body: { ok: true, messages: messages_fixture }.to_json)
           end
 
           it 'generates the transcript UI properly' do

spec/lib/discourse_chat/provider/slack/slack_transcript_spec.rb

@@ -105,7 +105,7 @@ RSpec.describe DiscourseChat::Provider::SlackProvider::SlackTranscript do
 
     describe 'loading history' do
       it 'loads messages correctly' do
-        stub_request(:post, "https://slack.com/api/channels.history")
+        stub_request(:post, "https://slack.com/api/conversations.history")
           .with(body: hash_including(token: "abcde", channel: 'G1234'))
           .to_return(status: 200, body: { ok: true, messages: messages_fixture }.to_json)
 
@@ -113,14 +113,14 @@ RSpec.describe DiscourseChat::Provider::SlackProvider::SlackTranscript do
       end
 
       it 'handles failed connection' do
-        stub_request(:post, "https://slack.com/api/channels.history")
+        stub_request(:post, "https://slack.com/api/conversations.history")
           .to_return(status: 500, body: {}.to_json)
 
           expect(transcript.load_chat_history).to be_falsey
       end
 
       it 'handles slack failure' do
-        stub_request(:post, "https://slack.com/api/channels.history")
+        stub_request(:post, "https://slack.com/api/conversations.history")
           .to_return(status: 200, body: { ok: false }.to_json)
 
           expect(transcript.load_chat_history).to be_falsey
@@ -129,7 +129,7 @@ RSpec.describe DiscourseChat::Provider::SlackProvider::SlackTranscript do
 
     context 'with loaded messages' do
       before do
-        stub_request(:post, "https://slack.com/api/channels.history")
+        stub_request(:post, "https://slack.com/api/conversations.history")
           .with(body: hash_including(token: "abcde", channel: 'G1234'))
           .to_return(status: 200, body: { ok: true, messages: messages_fixture }.to_json)
         transcript.load_chat_history