silverstripe-contentreview/code/extensions/ContentReviewDefaultSettings.php

<?php

/**
 * This extensions add a default schema for new pages and pages without a content
 * review setting.
 *
 * @property int $ReviewPeriodDays
 */
class ContentReviewDefaultSettings extends DataExtension
{
    /**
     * @var array
     */
    private static $db = array(
        "ReviewPeriodDays" => "Int",
    );

    /**
     *
     * @var array
     */
    private static $many_many = array(
        "ContentReviewGroups" => "Group",
        "ContentReviewUsers"  => "Member",
    );

    /**
     *
     * @return string
     */
    public function getOwnerNames()
    {
        $names = array();

        foreach ($this->OwnerGroups() as $group) {
            $names[] = $group->getBreadcrumbs(" > ");
        }

        foreach ($this->OwnerUsers() as $group) {
            $names[] = $group->getName();
        }

        return implode(", ", $names);
    }

    /**
     * @return ManyManyList
     */
    public function OwnerGroups()
    {
        return $this->owner->getManyManyComponents("ContentReviewGroups");
    }

    /**
     * @return ManyManyList
     */
    public function OwnerUsers()
    {
        return $this->owner->getManyManyComponents("ContentReviewUsers");
    }

    /**
     *
     * @param FieldList $fields
     */
    public function updateCMSFields(FieldList $fields)
    {
        $helpText = LiteralField::create("ContentReviewHelp", _t("ContentReview.DEFAULTSETTINGSHELP", "These content review settings will apply to all pages that does not have specific Content Review schedule."));

        $fields->addFieldToTab("Root.ContentReview", $helpText);

        $reviewFrequency = DropdownField::create("ReviewPeriodDays", _t("ContentReview.REVIEWFREQUENCY", "Review frequency"), SiteTreeContentReview::get_schedule())
            ->setDescription(_t("ContentReview.REVIEWFREQUENCYDESCRIPTION", "The review date will be set to this far in the future whenever the page is published"));

        $fields->addFieldToTab("Root.ContentReview", $reviewFrequency);

        $users = Permission::get_members_by_permission(array(
            "CMS_ACCESS_CMSMain",
            "ADMIN",
        ));

        $usersMap = $users->map("ID", "Title")->toArray();
        asort($usersMap);

        $userField = ListboxField::create("OwnerUsers", _t("ContentReview.PAGEOWNERUSERS", "Users"), $usersMap)
            ->setMultiple(true)
            ->setAttribute("data-placeholder", _t("ContentReview.ADDUSERS", "Add users"))
            ->setDescription(_t("ContentReview.OWNERUSERSDESCRIPTION", "Page owners that are responsible for reviews"));

        $fields->addFieldToTab("Root.ContentReview", $userField);

        $groupsMap = array();

        foreach (Group::get() as $group) {
            // Listboxfield values are escaped, use ASCII char instead of &raquo;
            $groupsMap[$group->ID] = $group->getBreadcrumbs(" > ");
        }

        asort($groupsMap);

        $groupField = ListboxField::create("OwnerGroups", _t("ContentReview.PAGEOWNERGROUPS", "Groups"), $groupsMap)
            ->setMultiple(true)
            ->setAttribute("data-placeholder", _t("ContentReview.ADDGROUP", "Add groups"))
            ->setDescription(_t("ContentReview.OWNERGROUPSDESCRIPTION", "Page owners that are responsible for reviews"));

        $fields->addFieldToTab("Root.ContentReview", $groupField);
    }

    /**
     * Get all Members that are default Content Owners. This includes checking group hierarchy
     * and adding any direct users.
     *
     * @return ArrayList
     */
    public function ContentReviewOwners() {
        return SiteTreeContentReview::merge_owners($this->OwnerGroups(), $this->OwnerUsers());
    }
}