From fb80f56a7ddf6052c1fd2de43795e03ede34f177 Mon Sep 17 00:00:00 2001
From: Devin Howard <devin@callysto.com>
Date: Wed, 13 Apr 2016 17:20:01 +0800
Subject: [PATCH] slack exception notifications

---
 .example-env                                  |  7 +++-
 Gemfile                                       |  2 +
 Gemfile.lock                                  |  6 +++
 config/initializers/exception_notification.rb | 37 +++++++++++++++++++
 4 files changed, 50 insertions(+), 2 deletions(-)
 create mode 100644 config/initializers/exception_notification.rb

diff --git a/.example-env b/.example-env
index 54039a93..f3bace35 100644
--- a/.example-env
+++ b/.example-env
@@ -16,14 +16,17 @@ export DEVISE_SECRET_KEY='f71c467e526f23d614b3b08866cad4788c502bed869c282f06e73e
 # export AWS_ACCESS_KEY_ID
 # export AWS_SECRET_ACCESS_KEY
 # export SSO_KEY
-# 
+#
 # export SMTP_DOMAIN
 # export SMTP_PASSWORD
 # export SMTP_PORT
 # export SMTP_SERVER
 # export SMTP_USERNAME
+
+# # send exception notifications to a slack incoming webhook
+# export SLACK_EN_WEBHOOK_URL
  
-#ruby garbage collection stuff
+# ruby garbage collection stuff
 
 export RUBY_GC_TUNE=0 #set to 1 to enable GC test
 export RUBY_GC_TOKEN=4f4380fc9a2857d1f008005a3eb86928
diff --git a/Gemfile b/Gemfile
index 90d55f04..815c5eee 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,6 +11,7 @@ gem 'delayed_job_active_record', '~> 4.0.1'
 gem 'devise'
 gem 'doorkeeper'
 gem 'dotenv'
+gem 'exception_notification'
 gem 'formtastic'
 gem 'formula'
 gem 'httparty'
@@ -23,6 +24,7 @@ gem 'pundit_extra'
 gem 'rack-cors'
 gem 'rails3-jquery-autocomplete'
 gem 'redis'
+gem 'slack-notifier'
 gem 'snorlax'
 gem 'uservoice-ruby'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 44873eda..59a2e295 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -89,6 +89,9 @@ GEM
       railties (>= 3.2)
     dotenv (2.1.0)
     erubis (2.7.0)
+    exception_notification (4.1.4)
+      actionmailer (~> 4.0)
+      activesupport (~> 4.0)
     execjs (2.6.0)
     ezcrypto (0.7.2)
     factory_girl (4.5.0)
@@ -229,6 +232,7 @@ GEM
       json (~> 1.8)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.0)
+    slack-notifier (1.5.1)
     slop (3.6.0)
     snorlax (0.1.5)
       rails (> 4.1)
@@ -270,6 +274,7 @@ DEPENDENCIES
   devise
   doorkeeper
   dotenv
+  exception_notification
   factory_girl_rails
   formtastic
   formula
@@ -296,6 +301,7 @@ DEPENDENCIES
   sass-rails
   shoulda-matchers
   simplecov
+  slack-notifier
   snorlax
   tunemygc
   uglifier
diff --git a/config/initializers/exception_notification.rb b/config/initializers/exception_notification.rb
new file mode 100644
index 00000000..5423334e
--- /dev/null
+++ b/config/initializers/exception_notification.rb
@@ -0,0 +1,37 @@
+require 'exception_notification/rails'
+
+ExceptionNotification.configure do |config|
+  # Ignore additional exception types.
+  # ActiveRecord::RecordNotFound, AbstractController::ActionNotFound and
+  # ActionController::RoutingError are already added.
+  config.ignored_exceptions += %w(
+    ActionView::TemplateError CustomError UnauthorizedException
+    InvalidArgumentException InvalidEntityException InvalidRequestException
+    NotFoundException ValidationException
+  )
+
+  # Adds a condition to decide when an exception must be ignored or not.
+  # The ignore_if method can be invoked multiple times to add extra conditions.
+  config.ignore_if do |_exception, _options|
+    !Rails.env.production?
+  end
+
+  # Notifiers ######
+
+  if ENV['SLACK_EN_WEBHOOK_URL']
+    config.add_notifier :slack, webhook_url: ENV['SLACK_EN_WEBHOOK_URL']
+  end
+
+  # Email notifier sends notifications by email.
+  # config.add_notifier :email, {
+  #   :email_prefix         => "[ERROR] ",
+  #   :sender_address       => %{"Notifier" <notifier@example.com>},
+  #   :exception_recipients => %w{exceptions@example.com}
+  # }
+
+  # Webhook notifier sends notifications over HTTP protocol. Requires 'httparty' gem.
+  # config.add_notifier :webhook, {
+  #   :url => 'http://example.com:5555/hubot/path',
+  #   :http_method => :post
+  # }
+end