module Boxroom
  class FoldersController < Boxroom::ApplicationController
    include Boxroom::BaseController

    before_action :require_existing_folder, :only => [:show, :edit, :update, :destroy]
    before_action :require_existing_target_folder, :only => [:new, :create]
    before_action :require_folder_isnt_root_folder, :only => [:edit, :update, :destroy]

    before_action :require_create_permission, :only => [:new, :create]
    before_action :require_read_permission, :only => :show
    before_action :require_update_permission, :only => [:edit, :update]
    before_action :require_delete_permission, :only => :destroy

    def index
      redirect_to Folder.root
    end

    # Note: @folder is set in require_existing_folder
    def show
    end

    # Note: @target_folder is set in require_existing_target_folder
    def new
      @folder = @target_folder.children.build
    end

    # Note: @target_folder is set in require_existing_target_folder
    def create
      @folder = @target_folder.children.build(permitted_params.folder)

      if @folder.save
        redirect_to @target_folder
      else
        render :action => 'new'
      end
    end

    # Note: @folder is set in require_existing_folder
    def edit
    end

    # Note: @folder is set in require_existing_folder
    def update
      if @folder.update_attributes(permitted_params.folder)
        redirect_to edit_folder_url(@folder), :notice => t(:your_changes_were_saved)
      else
        render :action => 'edit'
      end
    end

    # Note: @folder is set in require_existing_folder
    def destroy
      target_folder = @folder.parent
      @folder.destroy
      redirect_to target_folder
    end

    private

    # get_folder_or_redirect is defined in ApplicationController
    def require_existing_folder
      @folder = get_folder_or_redirect(params[:id])
    end

    def require_folder_isnt_root_folder
      if @folder.is_root?
        redirect_to Folder.root, :alert => t(:cannot_delete_root_folder)
      end
    end

    # Overrides require_delete_permission in ApplicationController
    def require_delete_permission
      unless @folder.is_root? || boxroom_current_user.can_delete(@folder)
        redirect_to @folder.parent, :alert => t(:no_permissions_for_this_type, :method => t(:delete), :type => t(:this_folder))
      else
        require_delete_permissions_for(@folder.children)
      end
    end

    def require_delete_permissions_for(folders)
      folders.each do |folder|
        unless boxroom_current_user.can_delete(folder)
          redirect_to @folder.parent, :alert => t(:no_delete_permissions_for_subfolder)
        else
          # Recursive...
          require_delete_permissions_for(folder.children)
        end
      end
    end
  end
end