Merge 7da407e into 1b9e634

lib/send_grid_mailer/api.rb

@@ -2,27 +2,32 @@ module SendGridMailer
   class Api
     include Logger
 
-    SUCCESS_CODE = 202
+    SUCCESS_CODES = { mail: 202, template: 200 }
 
     def initialize(api_key)
       @api_key = api_key || raise(SendGridMailer::InvalidApiKey)
     end
 
     def send_mail(sg_definition)
       response = sg_api.client.mail._('send').post(request_body: sg_definition.to_json)
-      handle_response(response)
+      handle_response(response, :mail)
+    end
+
+    def get_template(sg_definition)
+      response = sg_api.client.templates._(sg_definition.mail.template_id).get()
+      handle_response(response, :template)
     end
 
     private
 
-    def handle_response(response)
-      if response.status_code.to_i != SUCCESS_CODE
+    def handle_response(response, api_call_type)
+      if response.status_code.to_i != SUCCESS_CODES[api_call_type]
         errors = response_errors(response)
-        log_api_error_response(response.status_code, errors)
+        log_api_error_response(response.status_code, errors, api_call_type)
         raise SendGridMailer::ApiError.new(response.status_code, errors)
       end
 
-      log_api_success_response(response)
+      log_api_success_response(response, api_call_type)
       response
     end
 

lib/send_grid_mailer/dev_deliverer.rb

@@ -0,0 +1,60 @@
+module SendGridMailer
+  class DevDeliverer
+    include InterceptorsHandler
+    include Logger
+    require "letter_opener"
+
+    def deliver!(sg_definition)
+      @sg_definition = sg_definition
+      execute_interceptors(@sg_definition)
+      log_definition(@sg_definition)
+      letter_opener_delivery_method.deliver!(mail)
+    end
+
+    private
+
+    def sg_api
+      @sg_api ||= Api.new(api_key)
+    end
+
+    def api_key
+      Rails.application.config.action_mailer.sendgrid_dev_settings[:api_key]
+    rescue
+      nil
+    end
+
+    def letter_opener_delivery_method
+      @letter_opener_delivery_method ||= LetterOpener::DeliveryMethod.new(location: '/tmp/mails')
+    end
+
+    def parsed_template
+      template_response = sg_api.get_template(@sg_definition)
+      template_active_version = JSON.parse(template_response.body)["versions"].find do |version|
+        version["active"] == 1
+      end
+      template_content = template_active_version["html_content"]
+      @sg_definition.personalization.substitutions.each { |k, v| template_content.gsub!(k, v) }
+      template_content
+    end
+
+    def emails(origin)
+      @emails ||= {}
+      return @emails[origin] if @emails.has_key?(origin)
+
+      @emails[origin] = @sg_definition.personalization.send(origin)&.map {|em| em["email"]}
+    end
+
+    def mail
+      template = parsed_template.html_safe
+      m = Mail.new
+      m.html_part = template
+      m.subject = @sg_definition.personalization.subject
+      m.from = @sg_definition.mail.from["email"] if @sg_definition.mail.from.present?
+      m.to = emails(:tos) if emails(:tos).present?
+      m.cc = emails(:ccs) if emails(:ccs).present?
+      m.bcc = emails(:bccs) if emails(:bccs).present?
+
+      m
+    end
+  end
+end

lib/send_grid_mailer/engine.rb

@@ -17,9 +17,11 @@ class Engine < ::Rails::Engine
       require_relative "./mailer_base_ext"
     end
 
-    initializer "add_sendgrid_deliverer", before: "action_mailer.set_configs" do
+    initializer "add_sendgrid_deliverers", before: "action_mailer.set_configs" do
+      require_relative "./dev_deliverer"
       require_relative "./deliverer"
       ActionMailer::Base.add_delivery_method(:sendgrid, SendGridMailer::Deliverer)
+      ActionMailer::Base.add_delivery_method(:sendgrid_dev, SendGridMailer::DevDeliverer)
     end
   end
 end

lib/send_grid_mailer/logger.rb

@@ -20,18 +20,36 @@ def log_definition(definition)
       log(build_definition_message(data))
     end
 
-    def log_api_success_response(response)
-      log("The E-mail was successfully sent :)\nStatus Code: #{response.status_code}")
+    def log_api_success_response(response, api_call_type)
+      log(success_message(response, api_call_type))
     end
 
-    def log_api_error_response(status_code, errors)
-      msg = "The E-mail was not sent :(\nStatus Code: #{status_code}\nErrors:"
+    def log_api_error_response(status_code, errors, api_call_type)
+      msg = failure_message(status_code, api_call_type)
       msg += log_errors(errors)
       log(msg)
     end
 
     private
 
+    def success_message(response, api_call_type)
+      case api_call_type
+      when :mail
+        "The E-mail was successfully sent :)\nStatus Code: #{response.status_code}"
+      when :template
+        "The template was succesfully fetched :)\nStatus Code: #{response.status_code}"
+      end
+    end
+
+    def failure_message(status_code, api_call_type)
+      case api_call_type
+      when :mail
+        "The E-mail was not sent :(\nStatus Code: #{status_code}\nErrors:"
+      when :template
+        "The template was not fetched :(\nStatus Code: #{status_code}\nErrors:"
+      end
+    end
+
     def log(msg)
       Rails.logger.info("\n#{msg}")
       nil

lib/send_grid_mailer/mailer_base_ext.rb

@@ -23,7 +23,7 @@ def mail(headers = {}, &_block)
 
       define_sg_mail(headers)
 
-      SendGridMailer::Deliverer.new.deliver!(sg_definition)
+      deliverer&.new&.deliver!(sg_definition)
     end
 
     private
@@ -82,8 +82,16 @@ def sg_definition
       @sg_definition ||= SendGridMailer::Definition.new
     end
 
+    def deliverer
+      if self.class.delivery_method == :sendgrid_dev
+        SendGridMailer::DevDeliverer
+      elsif self.class.delivery_method == :sendgrid
+        SendGridMailer::Deliverer
+      end
+    end
+
     def enabled_sendgrid?
-      self.class.delivery_method == :sendgrid
+      [:sendgrid, :sendgrid_dev].include?(self.class.delivery_method)
     end
   end
 end

send_grid_mailer.gemspec

@@ -21,9 +21,10 @@ Gem::Specification.new do |s|
 
   s.add_dependency "rails", ">= 4.2.0"
   s.add_dependency "sendgrid-ruby", "~> 4.0", ">= 4.0.4"
+  s.add_dependency "letter_opener", "~> 1.7.0"
   s.add_development_dependency "pry"
   s.add_development_dependency "pry-rails"
-  s.add_development_dependency "sqlite3"
+  s.add_development_dependency "sqlite3", "~> 1.3.13"
   s.add_development_dependency "rspec-rails", "~> 3.4.0"
   s.add_development_dependency "guard-rspec", "~> 4.7"
   s.add_development_dependency "factory_bot_rails"

spec/dummy/app/mailers/test_mailer.rb

@@ -78,4 +78,10 @@ def substitutions_email
     substitute "%key2%", "value2"
     mail(body: "X")
   end
+
+  def template_with_substitutions_email(value)
+    set_template_id("XXX")
+    substitute "%key%", value
+    mail(to: "r1@platan.us", body: "X")
+  end
 end