app/controllers/application_controller.rb
# encoding: utf-8
class ApplicationController < ActionController::Base
include Foodsoft::ControllerExtensions::Locale
include Foodsoft::ControllerExtensions::ExceptionHandler
helper_method :available_locales
protect_from_forgery
before_filter :select_foodcoop, :authenticate, :store_controller, :items_per_page
after_filter :remove_controller
around_filter :set_time_zone, :set_currency
# Returns the controller handling the current request.
def self.current
Thread.current[:application_controller]
end
# return search data from query
# this is public because it can also be called from a view - to
# be able to initialize input fields (select2&friends)
def search_data(query, field)
# is_a? on ActiveRecord doesn't work http://stackoverflow.com/questions/7828666
if query.respond_to? :offset
limit = (params[:limit] or 10)
offset = (params[:offset] or 0)
data = query.limit(limit).offset(offset)
else
data = query
end
{
:total => query.count,
:results =>
if field.respond_to? :call
data.map {|o| {id: o.id, text: field.call(o)} }
else
# ActiveRecord.pluck() doesn't always work here because of relations
# http://meltingice.net/2013/06/11/pluck-multiple-columns-rails/
query.respond_to? :offset and query = query.select(:id).select(field)
data.map {|o| {id: o.id, text: o[field] } }
end
}
end
protected
def current_user
# check if there is a valid session and return the logged-in user (its object)
if session[:user_id] and params[:foodcoop]
# for shared-host installations. check if the cookie-subdomain fits to request.
@current_user ||= User.find_by_id(session[:user_id]) if session[:scope] == FoodsoftConfig.scope
end
end
helper_method :current_user
def deny_access
session[:return_to] = request.original_url
redirect_to root_url, alert: I18n.t('application.controller.error_denied', sign_in: ActionController::Base.helpers.link_to(t('application.controller.error_denied_sign_in'), login_path))
end
private
def login(user)
session[:user_id] = user.id
session[:scope] = FoodsoftConfig.scope # Save scope in session to not allow switching between foodcoops with one account
session[:locale] = user.locale
end
def logout
session[:user_id] = nil
session[:return_to] = nil
end
def authenticate(role = 'any')
# Attempt to retrieve authenticated user from controller instance or session...
if !current_user
# No user at all: redirect to login page.
logout
session[:return_to] = request.original_url
redirect_to_login :alert => I18n.t('application.controller.error_authn')
else
# We have an authenticated user, now check role...
# Roles gets the user through his memberships.
hasRole = case role
when "admin" then current_user.role_admin?
when "finance" then current_user.role_finance?
when "article_meta" then current_user.role_article_meta?
when "suppliers" then current_user.role_suppliers?
when "orders" then current_user.role_orders?
when "finance_or_orders" then (current_user.role_finance? || current_user.role_orders?)
when "any" then true # no role required
else false # any unknown role will always fail
end
if hasRole
current_user
else
deny_access
end
end
end
def authenticate_admin
authenticate('admin')
end
def authenticate_finance
authenticate('finance')
end
def authenticate_article_meta
authenticate('article_meta')
end
def authenticate_suppliers
authenticate('suppliers')
end
def authenticate_orders
authenticate('orders')
end
def authenticate_finance_or_orders
authenticate('finance_or_orders')
end
# checks if the current_user is member of given group.
# if fails the user will redirected to startpage
def authenticate_membership_or_admin(group_id = params[:id])
@group = (Group.find(group_id) rescue nil)
unless @current_user.role_admin?
unless @group and @group.member?(@current_user)
redirect_to root_path, alert: I18n.t('application.controller.error_members_only')
end
end
end
def authenticate_or_token(prefix, role = 'any')
if not params[:token].blank?
begin
TokenVerifier.new(prefix).verify(params[:token])
rescue ActiveSupport::MessageVerifier::InvalidSignature
redirect_to root_path, alert: I18n.t('application.controller.error_token')
end
else
authenticate(role)
end
end
# Many plugins can be turned on and off on the fly with a `use_` configuration option.
# To disable a controller in the plugin, you can use this as a `before_action`:
#
# class MypluginController < ApplicationController
# before_filter -> { require_plugin_enabled FoodsoftMyplugin }
# end
#
def require_plugin_enabled(plugin)
unless plugin.enabled?
redirect_to root_path, alert: I18n.t('application.controller.error_plugin_disabled')
end
end
# Redirect to the login page, used in authenticate, plugins can override this.
def redirect_to_login(options={})
redirect_to login_url, options
end
# Stores this controller instance as a thread local varibale to be accessible from outside ActionController/ActionView.
def store_controller
Thread.current[:application_controller] = self
end
# Sets the thread local variable that holds a reference to the current controller to nil.
def remove_controller
Thread.current[:application_controller] = nil
end
# Get supplier in nested resources
def find_supplier
@supplier = Supplier.find(params[:supplier_id]) if params[:supplier_id]
end
# Set config and database connection for each request
# It uses the subdomain to select the appropriate section in the config files
# Use this method as a before filter (first filter!) in ApplicationController
def select_foodcoop
if FoodsoftConfig[:multi_coop_install]
if params[:foodcoop].present?
begin
# Set Config and database connection
FoodsoftConfig.select_foodcoop params[:foodcoop]
rescue => error
redirect_to root_url, alert: error.message
end
else
redirect_to root_url
end
end
end
def items_per_page
if params[:per_page] && params[:per_page].to_i > 0 && params[:per_page].to_i <= 500
@per_page = params[:per_page].to_i
else
@per_page = 20
end
end
# Always stay in foodcoop url scope
def default_url_options(options = {})
{foodcoop: FoodsoftConfig.scope}
end
# Set timezone according to foodcoop preference.
# @see http://stackoverflow.com/questions/4362663/timezone-with-rails-3
# @see http://archives.ryandaigle.com/articles/2008/1/25/what-s-new-in-edge-rails-easier-timezones
def set_time_zone
old_time_zone = Time.zone
Time.zone = FoodsoftConfig[:time_zone] if FoodsoftConfig[:time_zone]
yield
ensure
Time.zone = old_time_zone
end
# Set currency according to foodcoop preference.
# @see #set_time_zone
def set_currency
old_currency = ::I18n.t('number.currency.format.unit')
new_currency = FoodsoftConfig[:currency_unit] || ''
new_currency += "\u202f" if FoodsoftConfig[:currency_space]
::I18n.backend.store_translations(::I18n.locale, number: {currency: {format: {unit: new_currency}}})
yield
ensure
::I18n.backend.store_translations(::I18n.locale, number: {currency: {format: {unit: old_currency}}})
end
end