add embed functionality

Gemfile

@@ -66,6 +66,8 @@ gem "paperclip", "~> 6.0.0"
 
 gem 'aws-sdk', '~> 3'
 
+gem 'rack-cors', :require => 'rack/cors'
+
 group :development, :test do
   # Call 'byebug' anywhere in the code to stop execution and get a debugger console
   gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]

Gemfile.lock

@@ -804,6 +804,7 @@ GEM
     public_suffix (3.0.3)
     puma (3.12.0)
     rack (2.0.5)
+    rack-cors (1.0.2)
     rack-protection (2.0.4)
       rack
     rack-test (1.1.0)
@@ -955,6 +956,7 @@ DEPENDENCIES
   paperclip (~> 6.0.0)
   pg
   puma (~> 3.11)
+  rack-cors
   rails (~> 5.2.0)
   rest-client
   sass-rails (~> 5.0)

app/views/i/posts/show.html.haml

@@ -12,3 +12,24 @@
           %time.lighter{ datetime: @post.published }= @post.published&.strftime("%B #{@post.published.day.ordinalize}, %Y")
         %h1= @post.title
       = raw @parsed.html_safe
+
+:javascript
+  $(".article a").each(function() {
+    var node = this;
+
+    if (this.text === "embed:tweet") {
+      $.ajax({
+        url: `https://publish.twitter.com/oembed?url=${node.href}`,
+        type: "GET",
+        dataType: "jsonp",
+        success: function (response) {
+          var nodeToReplace = $(node)
+          nodeToReplace.parent().append($(response.html))
+          nodeToReplace.remove()
+        },
+        error: function (xhr, status) {
+            console.log("error");
+        }
+      });
+    }
+  });

config/application.rb

@@ -16,6 +16,13 @@ class Application < Rails::Application
     # -- all .rb files in that directory are automatically loaded after loading
     # the framework and any gems in your application.
 
+    config.middleware.insert_before 0, Rack::Cors do
+      allow do
+        origins '*'
+        resource '*', headers: :any, methods: [:get, :post, :options]
+      end
+    end
+
     Raven.configure do |config|
       config.dsn = 'https://3286d54592144330be6af85fd527f76b:[email protected]/1286413'
     end