working prototype

Author: codergeek121

.gitignore

@@ -8,3 +8,4 @@
 /test/dummy/log/*.log
 /test/dummy/storage/
 /test/dummy/tmp/
+Gemfile.lock

Gemfile

@@ -9,4 +9,4 @@ gem "puma"
 gem "sqlite3"
 
 # Start debugger with binding.b [https://github.com/ruby/debug]
-# gem "debug", ">= 1.0.0"
+gem "debug", ">= 1.0.0"

app/views/email_error_reporter/error_mailer/_frame.html.erb

@@ -0,0 +1 @@
+<li><%= frame %></li>

app/views/email_error_reporter/error_mailer/_no_backtrace.html.erb

@@ -0,0 +1 @@
+<p>No backtrace available</p>

app/views/email_error_reporter/error_mailer/error.html.erb

@@ -0,0 +1,6 @@
+<h1><%= @error.class %></h1>
+<p><%= @error.message %></p>
+
+<div>
+<%= render(partial: "frame", collection: @backtrace) || render("no_backtrace") -%>
+</div>

lib/email_error_reporter.rb

@@ -1,6 +1,10 @@
 require "email_error_reporter/version"
-require "email_error_reporter/railtie"
+require "email_error_reporter/engine"
 
 module EmailErrorReporter
-  # Your code goes here...
+  extend ActiveSupport::Autoload
+
+  autoload :ErrorMailer
+  autoload :Subscriber
+  autoload :ExceptionSerializer
 end

lib/email_error_reporter/engine.rb

@@ -0,0 +1,17 @@
+module EmailErrorReporter
+  class Engine < ::Rails::Engine
+    isolate_namespace EmailErrorReporter
+
+    config.email_error_reporter = ActiveSupport::OrderedOptions.new
+    config.email_error_reporter.to = []
+
+    initializer "email_error_reporter.error_subscribe" do
+      Rails.error.subscribe(Subscriber.new)
+    end
+
+    # ActiveJob cannot (de)-serialize exceptions by default
+    initializer "email_error_reporter.exception_serializer" do |app|
+      app.config.active_job.custom_serializers << ExceptionSerializer
+    end
+  end
+end

lib/email_error_reporter/error_mailer.rb

@@ -0,0 +1,18 @@
+module EmailErrorReporter
+  class ErrorMailer < ActionMailer::Base
+    def error(error, handled:, severity:, context:, source: nil)
+      @error = error
+      @handled = handled
+      @severity = severity
+      @context = context
+      @source = source
+
+      @backtrace = Array.wrap(error.backtrace)
+
+      mail(
+        subject: "#{error.class}",
+        to: Rails.application.config.email_error_reporter.to
+      )
+    end
+  end
+end

lib/email_error_reporter/exception_serializer.rb

@@ -0,0 +1,23 @@
+module EmailErrorReporter
+  class ExceptionSerializer < ActiveJob::Serializers::ObjectSerializer
+    def serialize(exception)
+      super(
+        exception_class: exception.class.to_s,
+        message: exception.message,
+        backtrace: exception.backtrace
+      )
+    end
+
+    def deserialize(hash)
+      hash[:exception_class].constantize.new(hash[:message]).tap do |e|
+        e.set_backtrace(hash[:backtrace])
+      end
+    end
+
+    private
+
+    def klass
+      Exception
+    end
+  end
+end