Create event to post welcome message

app/models/slack_methods.rb

@@ -83,6 +83,24 @@ def self.start_meet!(channel_id, meet_name)
     slack_client.pins_add(channel: channel_id, timestamp: message[:ts])
   end
 
+  def self.users_name(user)
+    slack_client.users_info(
+      user: user,
+    )[:user][:profile][:first_name]
+  end
+
+  def self.user_id(user)
+    slack_client.users_info(
+      user: user,
+    )[:user][:id]
+  end
+
+  def self.channel_name(channel_id)
+    slack_client.conversations_info(
+      channel: channel_id,
+    )[:channel][:name]
+  end
+
   def self.open_the_modal(trigger_id, view_payload)
     slack_client.views_open(
       trigger_id: trigger_id,

bot/events.rb

@@ -0,0 +1 @@
+require_relative 'events/welcome_message'

bot/events/welcome_message.rb

@@ -0,0 +1,16 @@
+SlackRubyBotServer::Events.configure do |config|
+  config.on :event, ['event_callback', 'member_joined_channel'] do |event|
+
+    name = SlackMethods.users_name(event[:event][:user])
+    user_id = SlackMethods.user_id(event[:event][:user])
+
+    channel_name = SlackMethods.channel_name(event[:event][:channel])
+
+    if channel_name.include? 'incident'
+      incident_title = channel_name.split('_').drop(3).join('-')
+      SlackMethods.post_a_message_to_user(channel_name, user_id, "Welcome #{name} to the incident channel. Please review the docs and join the <http://g.co/meet/#{incident_title}| discussion>.")
+    end
+
+    { ok: true }
+  end
+end

config.ru

@@ -7,6 +7,7 @@ require_relative 'config/environment'
 
 require_relative 'bot/slash_commands'
 require_relative 'bot/actions'
+require_relative 'bot/events'
 require 'yaml'
 require 'erb'