diagnostics.rb in message_bus-2.2.0.pre

- old
+ new

@@ -1,70 +1,23 @@
 # frozen_string_literal: true
+
 module MessageBus::Rack; end
 
+# Accepts requests from clients interested in using diagnostics functionality
+# @see MessageBus::Diagnostics
 class MessageBus::Rack::Diagnostics
+  # @param [Proc] app the rack app
+  # @param [Hash] config
+  # @option config [MessageBus::Instance] :message_bus (`MessageBus`) a specific instance of message_bus
   def initialize(app, config = {})
     @app = app
     @bus = config[:message_bus] || MessageBus
   end
 
-  def js_asset(name)
-    return generate_script_tag(name) unless @bus.cache_assets
-    @@asset_cache ||= {}
-    @@asset_cache[name] ||= generate_script_tag(name)
-    @@asset_cache[name]
-  end
-
-  def  generate_script_tag(name)
-    "<script src='/message-bus/_diagnostics/assets/#{name}?#{file_hash(name)}' type='text/javascript'></script>"
-  end
-
-  def file_hash(asset)
-    require 'digest/sha1'
-    Digest::SHA1.hexdigest(asset_contents(asset))
-  end
-
-  def asset_contents(asset)
-    File.open(asset_path(asset)).read
-  end
-
-  def asset_path(asset)
-    File.expand_path("../../../../assets/#{asset}", __FILE__)
-  end
-
-  def index
-    html = <<HTML
-<!DOCTYPE html>
-<html>
-  <head>
-  </head>
-  <body>
-    <div id="app"></div>
-    #{js_asset "jquery-1.8.2.js"}
-    #{js_asset "handlebars.js"}
-    #{js_asset "ember.js"}
-    #{js_asset "message-bus.js"}
-    #{js_asset "application.handlebars"}
-    #{js_asset "index.handlebars"}
-    #{js_asset "application.js"}
-  </body>
-</html>
-HTML
-    return [200, { "content-type" => "text/html;" }, [html]]
-  end
-
-  def translate_handlebars(name, content)
-    "Ember.TEMPLATES['#{name}'] = Ember.Handlebars.compile(#{indent(content).inspect});"
-  end
-
-  # from ember-rails
-  def indent(string)
-    string.gsub(/$(.)/m, "\\1  ").strip
-  end
-
+  # Process an HTTP request from a subscriber client
+  # @param [Rack::Request::Env] env the request environment
   def call(env)
-
     return @app.call(env) unless env['PATH_INFO'].start_with? '/message-bus/_diagnostics'
 
     route = env['PATH_INFO'].split('/message-bus/_diagnostics')[1]
 
     if @bus.is_admin_lookup.nil? || !@bus.is_admin_lookup.call(env)
@@ -94,7 +47,64 @@
       end
       return [200, { 'content-type' => 'text/javascript;' }, [content]]
     end
 
     return [404, {}, ['not found']]
+  end
+
+  private
+
+  def js_asset(name)
+    return generate_script_tag(name) unless @bus.cache_assets
+
+    @@asset_cache ||= {}
+    @@asset_cache[name] ||= generate_script_tag(name)
+    @@asset_cache[name]
+  end
+
+  def generate_script_tag(name)
+    "<script src='/message-bus/_diagnostics/assets/#{name}?#{file_hash(name)}' type='text/javascript'></script>"
+  end
+
+  def file_hash(asset)
+    require 'digest/sha1'
+    Digest::SHA1.hexdigest(asset_contents(asset))
+  end
+
+  def asset_contents(asset)
+    File.open(asset_path(asset)).read
+  end
+
+  def asset_path(asset)
+    File.expand_path("../../../../assets/#{asset}", __FILE__)
+  end
+
+  def index
+    html = <<~HTML
+      <!DOCTYPE html>
+      <html>
+        <head>
+        </head>
+        <body>
+          <div id="app"></div>
+          #{js_asset "jquery-1.8.2.js"}
+          #{js_asset "handlebars.js"}
+          #{js_asset "ember.js"}
+          #{js_asset "message-bus.js"}
+          #{js_asset "application.handlebars"}
+          #{js_asset "index.handlebars"}
+          #{js_asset "application.js"}
+        </body>
+      </html>
+    HTML
+    return [200, { "content-type" => "text/html;" }, [html]]
+  end
+
+  def translate_handlebars(name, content)
+    "Ember.TEMPLATES['#{name}'] = Ember.Handlebars.compile(#{indent(content).inspect});"
+  end
+
+  # from ember-rails
+  def indent(string)
+    string.gsub(/$(.)/m, "\\1  ").strip
   end
 end