# controllers/application.rb:
# Parent class of all controllers in FOI site. Filters added to this controller
# apply to all controllers in the application. Likewise, all the methods added
# will be available for all controllers.
#
# Copyright (c) 2007 UK Citizens Online Democracy. All rights reserved.
# Email: francis@mysociety.org; WWW: http://www.mysociety.org/
#
# $Id: application.rb,v 1.21 2007-11-01 05:35:43 francis Exp $


class ApplicationController < ActionController::Base
    # Standard hearders, footers and navigation for whole site
    layout "default"

    # Pick a unique cookie name to distinguish our session data from others'
    session :session_key => '_foi_session_id'

    private

    # Check the user is logged in
    def authenticated?
        unless session[:user]
            session[:intended_uri] = request.request_uri
            session[:intended_params] = params
            redirect_to signin_url
            return false
        end
        return true
    end

    # Return logged in user
    def authenticated_user
        return User.find(session[:user])
    end

    # Do a POST redirect. This is a nasty hack - we store the posted values to
    # the controller, and when the GET redirect with "?post_redirect=1"
    # happens, load them in.
    def post_redirect(uri, params)
        session[:post_redirect_params] = params
        # XXX what is built in Ruby URI munging function?
        if uri.include?("?")
            uri += "&post_redirect=1"
        else
            uri += "?post_redirect=1"
        end
        redirect_to uri
    end

    # If we are in a faked redirect to POST request, then set post params.
    before_filter :check_in_post_redirect
    def check_in_post_redirect
        if params[:post_redirect] and session[:post_redirect_params]
            params.update(session[:post_redirect_params])
        end
    end

    # Default layout shows user in corner, so needs access to it
    before_filter :authentication_check
    def authentication_check
        if session[:user]
            @user = authenticated_user
        end
    end

    # For administration interface, return display name of authenticated user
    def admin_http_auth_user
        if not request.env["REMOTE_USER"]
            return "*unknown*";
        else
            return request.env["REMOTE_USER"]
        end
    end

    # URL generating functions are needed by all controllers (for redirects)
    # and views (for links), so include them into all of both.
    include LinkToHelper

end