FEATURE: support for slack custom username (#22)

* FEATURE: support for slack custom username

* make slack username setting backwards compatible

* fix slack username behavior when empty string

config/locales/server.en.yml

@@ -7,6 +7,7 @@ en:
     #######################################
     ########## SLACK SETTINGS #############
     #######################################
+    chat_integration_slack_username: "Bot's username to post to slack with"
     chat_integration_slack_enabled: 'Enable the slack chat-integration provider'
     chat_integration_slack_access_token: 'OAuth Access Token for authenticating with Slack'
     chat_integration_slack_incoming_webhook_token: 'The verification token used to authenticate incoming requests'

config/settings.yml

@@ -10,6 +10,8 @@ chat_integration:
 #######################################
 ########## SLACK SETTINGS #############
 #######################################
+  chat_integration_slack_username:
+    default: ''
   chat_integration_slack_enabled:
     default: false
     validator: "ChatIntegrationSlackEnabledSettingValidator"

lib/discourse_chat/provider/slack/slack_provider.rb

@@ -42,9 +42,16 @@ module DiscourseChat::Provider::SlackProvider
         "#{Discourse.base_url}#{url}"
       end
 
+    slack_username =
+      if SiteSetting.chat_integration_slack_username.present?
+        SiteSetting.chat_integration_slack_username
+      else
+        SiteSetting.title || "Discourse"
+      end
+
     message = {
       channel: channel,
-      username: SiteSetting.title || "Discourse",
+      username: slack_username,
       icon_url: icon_url,
       attachments: []
     }