#-- encoding: UTF-8
#-- copyright
# OpenProject is a project management system.
#
# Copyright (C) 2012-2013 the OpenProject Team
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 3.
#
# See doc/COPYRIGHT.rdoc for more details.
#++

class WatchersController < ApplicationController
  before_filter :find_watched_by_object, :except => [:destroy]
  before_filter :find_watched_by_id, :only => [:destroy]
  before_filter :find_project
  before_filter :require_login, :check_project_privacy, :only => [:watch, :unwatch]
  before_filter :authorize, :only => [:new, :create, :destroy]

  def watch
    if @watched.respond_to?(:visible?) && !@watched.visible?(User.current)
      render_403
    else
      set_watcher(User.current, true)
    end
  end

  def unwatch
    set_watcher(User.current, false)
  end

  def new
    @watcher = Watcher.new(params[:watcher])
    @watcher.watchable = @watched
    @watcher.save if request.post?

    respond_to do |format|
      format.html { redirect_to :back }
      format.js do
        render :update do |page|
          page.replace_html 'watchers', :partial => 'watchers/watchers', :locals => {:watched => @watched}
        end
      end
    end
  rescue ::ActionController::RedirectBackError
    render :text => 'Watcher added.', :layout => true
  end

  # TODO: remove this and replace with proper action
  alias :create :new

  def destroy
    @watched.set_watcher(@watch.user, false)
    respond_to do |format|
      format.html { redirect_to :back }
      format.js do
        render :update do |page|
          page.replace_html 'watchers', :partial => 'watchers/watchers', :locals => {:watched => @watched}
        end
      end
    end
  end

private
  def find_watched_by_object
    klass = params[:object_type].singularize.camelcase.constantize
    return false unless klass.respond_to?('watched_by')
    @watched = klass.find(params[:object_id])
  rescue
    render_404
  end

  def find_watched_by_id
    @watch = Watcher.find(params[:id], :include => { :watchable => [:project] } )
    @watched = @watch.watchable
  end

  def find_project
    @project = @watched.project
  end

  def set_watcher(user, watching)
    @watched.set_watcher(user, watching)

    respond_to do |format|
      format.html { redirect_to :back }
      format.js do
        if params[:replace].present?
          if params[:replace].is_a? Array
            @replace_selectors = params[:replace]
          else
            @replace_selectors = params[:replace].split(',').map(&:strip)
          end
        else
          @replace_selectors = ['#watcher']
        end
        @user = user

        render :action => 'replace_selectors'
      end
    end
  rescue ::ActionController::RedirectBackError
    render :text => (watching ? 'Watcher added.' : 'Watcher removed.'), :layout => true
  end
end