Feature/no request context

CHANGELOG.md

@@ -5,6 +5,7 @@ Contributors: please follow the recommendations outlined at [keepachangelog.com]
 
 ## [Unreleased]
 
+- React on Rails server rendering now supports contexts outside of browser rendering, such as ActionMailer templates [#486](https://github.com/shakacode/react_on_rails/pull/486) by [eacaps](https://github.com/eacaps)
 - React on Rails now correctly parses single-digit version strings from package.json [#491](https://github.com/shakacode/react_on_rails/pull/491)
 
 ## [6.0.5]

app/helpers/react_on_rails_helper.rb

@@ -341,29 +341,33 @@ def initialize_redux_stores
 
   # This is the definitive list of the default values used for the rails_context, which is the
   # second parameter passed to both component and store generator functions.
+  # rubocop:disable Metrics/AbcSize
   def rails_context(server_side:)
     @rails_context ||= begin
-      # Using Addressable instead of standard URI to better deal with
-      # non-ASCII characters (see https://github.com/shakacode/react_on_rails/pull/405)
-      uri = Addressable::URI.parse(request.original_url)
-      # uri = Addressable::URI.parse("http://foo.com:3000/posts?id=30&limit=5#time=1305298413")
-
       result = {
-        # URL settings
-        href: request.original_url,
-        location: "#{uri.path}#{uri.query.present? ? "?#{uri.query}" : ''}",
-        scheme: uri.scheme, # http
-        host: uri.host, # foo.com
-        port: uri.port,
-        pathname: uri.path, # /posts
-        search: uri.query, # id=30&limit=5
-
+        inMailer: controller.present? && controller.is_a?(ActionMailer::Base),
         # Locale settings
         i18nLocale: I18n.locale,
-        i18nDefaultLocale: I18n.default_locale,
-        httpAcceptLanguage: request.env["HTTP_ACCEPT_LANGUAGE"]
+        i18nDefaultLocale: I18n.default_locale
       }
-
+      if request.present?
+        # Using Addressable instead of standard URI to better deal with
+        # non-ASCII characters (see https://github.com/shakacode/react_on_rails/pull/405)
+        uri = Addressable::URI.parse(request.original_url)
+        # uri = Addressable::URI.parse("http://foo.com:3000/posts?id=30&limit=5#time=1305298413")
+
+        result.merge!(
+          # URL settings
+          href: request.original_url,
+          location: "#{uri.path}#{uri.query.present? ? "?#{uri.query}" : ''}",
+          scheme: uri.scheme, # http
+          host: uri.host, # foo.com
+          port: uri.port,
+          pathname: uri.path, # /posts
+          search: uri.query, # id=30&limit=5
+          httpAcceptLanguage: request.env["HTTP_ACCEPT_LANGUAGE"]
+        )
+      end
       if ReactOnRails.configuration.rendering_extension
         custom_context = ReactOnRails.configuration.rendering_extension.custom_context(self)
         result.merge!(custom_context) if custom_context

spec/dummy/app/mailers/dummy_mailer.rb

@@ -0,0 +1,8 @@
+class DummyMailer < ActionMailer::Base
+  add_template_helper(ReactOnRailsHelper)
+  default from: "nobody@nope.com"
+
+  def hello_email
+    mail(to: "otherperson@nope.com", subject: "you've got mail")
+  end
+end

spec/dummy/app/views/dummy_mailer/hello_email.html.erb

@@ -0,0 +1,7 @@
+Someone emailed this to you:
+
+<%= react_component("HelloWorld", props: {
+    helloWorldData: {
+        name: "Mr. Mailing Server Side Rendering"
+    }
+}, prerender: true) %>

spec/dummy/config/initializers/react_on_rails.rb

@@ -2,9 +2,13 @@ module RenderingExtension
   # Return a Hash that contains custom values from the view context that will get passed to
   # all calls to react_component and redux_store for rendering
   def self.custom_context(view_context)
-    {
-      somethingUseful: view_context.session[:something_useful]
-    }
+    if view_context.controller.is_a?(ActionMailer::Base)
+      {}
+    else
+      {
+        somethingUseful: view_context.session[:something_useful]
+      }
+    end
   end
 end
 

spec/dummy/spec/requests/server_render_check_spec.rb

@@ -58,6 +58,22 @@
     end
   end
 
+  describe "server render mailer" do
+    it "sends email okay" do
+      mail = DummyMailer.hello_email
+      expect(mail.subject).to match "mail"
+      expect(mail.body).to match "Mr. Mailing Server Side Rendering"
+      expect(mail.body).to match "inMailer":true"
+    end
+
+    it "sets inMailer properly" do
+      get client_side_hello_world_path
+      html_nodes = Nokogiri::HTML(response.body)
+      expect(html_nodes.css("div#js-react-on-rails-context").attr("data-rails-context").value)
+        .to match('inMailer\":false')
+    end
+  end
+
   describe "server rendering railsContext" do
     let(:http_accept_language) { "en-US,en;q=0.8" }