ListEditField.php

<?php

/**
* ListEditField is used in conjunction with ListEditForm
* to allow viewing and removing exiting list items.
* @link ListEditForm
*/
class ListEditField extends FormField
{

    private static $allowed_actions = array(
        'remove',
        'edit'
    );

    private static $url_handlers = array(
        '$Action/$ID' => '$Action',
    );
    
    protected $list;

    public function __construct($name, DataList $list)
    {
        $this->list = $list;
        parent::__construct($name);
    }

    public function Link($action = null, $id = null)
    {
        $link = parent::Link($action);
        if ($id) {
            $link = Controller::join_links($link, $id);
        }
        return $link;
    }

    /**
     * This is not a data field.
     * @return boolean
     */
    public function hasData()
    {
        return false;
    }

    /**
     * Template access for the list;
     * @return DataList list
     */
    public function getEditList()
    {
        return $this->list;
    }

    public function EditLink($id)
    {
        if ($obj = $this->list->byID($id)) {
            if ($obj->canEdit(Member::currentUser())) {
                return HTTP::setGetVar($this->ID(), $id);
            }
        }
    }

    public function RemoveLink($id)
    {
        if ($obj = $this->list->byID($id)) {
            if ($obj->canDelete(Member::currentUser())) {
                return $this->Link("remove", $id);
            }
        }
    }

    public function remove()
    {
        if ($obj = $this->list->byID($id = $this->request->param('ID'))) {
            if ($obj->canDelete(Member::currentUser())) {
                $this->list->removeById($id);
            }
        }

        return Controller::curr()->redirectBack();
    }

    /**
     * Allow DataObject specific templates,
     * using the form DataObjectName_ListEditField.ss
     * @return array templates
     */
    public function getTemplates()
    {
        $templates = parent::getTemplates();
        array_unshift($templates, $this->list->dataClass()."_ListEditField");
        return $templates;
    }
}