Class: Rails::ExtJS::Direct::RemotingProvider

Inherits:
Object
  • Object
show all
Defined in:
lib/rails-extjs-direct/rack/remoting_provider.rb

Overview

begin

require 'json'

rescue LoadError => load_error

raise "Error loading 'json' library. Please type 'sudo gem install json' and try again."

end

Instance Method Summary collapse

Constructor Details

#initialize(app, rpath) ⇒ RemotingProvider

Returns a new instance of RemotingProvider.



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# File 'lib/rails-extjs-direct/rack/remoting_provider.rb', line 8

def initialize(app, rpath)
    if app.kind_of?(String)
      @controllers = {}
      @type = app
    else
      @app = app
    end
    @router_path = rpath
end

Instance Method Details

#add_controller(controller_name) ⇒ Object 



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# File 'lib/rails-extjs-direct/rack/remoting_provider.rb', line 18

def add_controller(controller_name)
  @controllers[controller_name.capitalize] = "#{controller_name.capitalize}Controller".constantize.direct_actions
end

#call(env) ⇒ Object 



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# File 'lib/rails-extjs-direct/rack/remoting_provider.rb', line 26

def call(env)
    if env["PATH_INFO"].match("^"+@router_path)
        output = []
        parse(env["action_controller.request.request_parameters"]).each do |req|
          # have to dup the env for each request
          request_env = env.dup

          # pop poorly-named Ext.Direct routing-params off.
          controller = req.delete("action").downcase
          action =  req.delete("method")

          # set env URI and PATH_INFO for each request
          request_env["PATH_INFO"] = "/#{controller}/#{action}"
          request_env["REQUEST_URI"] = "/#{controller}/#{action}"

          # set request params
          request_env["action_controller.request.request_parameters"] = req

          # call the app!
          # TODO Implement begin/rescue to catch XExceptions
          status, headers, response = @app.call(request_env)

          output << response.body
        end
        # join all responses together
        res = output.join(',')

        # [wrap in array] if multiple responses.  Each controller response will have returned json already
        # so we don't want to re-encode.
        res = "[" + res + "]" if output.length > 1

        # return response
        [200, {"Content-Type" => "text/html"}, [res]]
    else
        @app.call(env)
    end
end

#parse(data) ⇒ Object 



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# File 'lib/rails-extjs-direct/rack/remoting_provider.rb', line 64

def parse(data)
    return (data["_json"]) ? data["_json"] : [data]
end

#render ⇒ Object 



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# File 'lib/rails-extjs-direct/rack/remoting_provider.rb', line 22

def render
  "<script>Ext.Direct.addProvider({type: '#{@type}', url: '#{@router_path}', actions: #{@controllers.to_json}});</script>"
end