class OpenIdController < ApplicationController
  open_id_consumer :required => [:email, :nickname]

  def begin
    # If the URL was unusable (either because of network conditions,
    # a server error, or that the response returned was not an OpenID
    # identity page), the library will return HTTP_FAILURE or PARSE_ERROR.
    # Let the user know that the URL is unusable.
    case open_id_response.status
      when OpenID::SUCCESS
        # The URL was a valid identity URL. Now we just need to send a redirect
        # to the server using the redirect_url the library created for us.

        # redirect to the server
        redirect_to open_id_response.redirect_url((request.protocol + request.host_with_port + "/"), url_for(:action => 'complete'))
      else
        flash[:error] = "Unable to find openid server for <q>#{params[:openid_url]}</q>"
        render :template => 'account/index'
    end
  end

  def complete
    case open_id_response.status
      when OpenID::FAILURE
        # In the case of failure, if info is non-nil, it is the
        # URL that we were verifying. We include it in the error
        # message to help the user figure out what happened.
        if open_id_response.identity_url
          flash[:message] = "Verification of #{open_id_response.identity_url} failed. "
        else
          flash[:message] = "Verification failed. "
        end
        flash[:message] += open_id_response.msg.to_s

      when OpenID::SUCCESS
        # Success means that the transaction completed without
        # error. If info is nil, it means that the user cancelled
        # the verification.
        flash[:message] = "You have successfully verified #{open_id_response.identity_url} as your identity."
        if open_id_fields.any?
          @user             = User.find_by_identity_url(open_id_response.identity_url)
          @user           ||= User.new(:identity_url => open_id_response.identity_url)
          @user.login       = open_id_fields['openid.sreg.nickname'] if open_id_fields['openid.sreg.nickname']
          @user.email       = open_id_fields['openid.sreg.email']    if open_id_fields['openid.sreg.email']
          if @user.save
            self.current_user = @user
            wipe_session_cache
            flash[:notice] = "Logged in successfully"
            redirect_back_or_default(:controller => 'articles', :action => 'index')
          else
            render :template => 'account/signup'
          end
        end

      when OpenID::CANCEL
        flash[:message] = "Verification cancelled."

      else
        flash[:message] = "Unknown response status: #{open_id_response.status}"
    end
    redirect_to :controller => 'account', :action => 'signup' unless performed?
  end

end