/
Comment.php
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Comment.php
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<?php
namespace SilverStripe\Comments\Model;
use SilverStripe\Dev\Deprecation;
use HTMLPurifier;
use HTMLPurifier_Config;
use SilverStripe\Comments\Controllers\CommentingController;
use SilverStripe\Comments\Extensions\CommentsExtension;
use SilverStripe\Comments\Model\Comment\SecurityToken;
use SilverStripe\Control\Controller;
use SilverStripe\Control\Director;
use SilverStripe\Core\Injector\Injector;
use SilverStripe\Core\TempFolder;
use SilverStripe\Forms\CheckboxField;
use SilverStripe\Forms\EmailField;
use SilverStripe\Forms\FieldGroup;
use SilverStripe\Forms\FieldList;
use SilverStripe\Forms\Form;
use SilverStripe\Forms\HeaderField;
use SilverStripe\Forms\HTMLEditor\HTMLEditorField;
use SilverStripe\Forms\TextareaField;
use SilverStripe\Forms\TextField;
use SilverStripe\ORM\ArrayList;
use SilverStripe\ORM\DataObject;
use SilverStripe\ORM\FieldType\DBDatetime;
use SilverStripe\ORM\PaginatedList;
use SilverStripe\ORM\SS_List;
use SilverStripe\Security\Member;
use SilverStripe\Security\Permission;
use SilverStripe\Security\Security;
/**
* Represents a single comment object.
*
* @property string $Name
* @property string $Comment
* @property string $Email
* @property string $URL
* @property string $BaseClass
* @property boolean $Moderated
* @property boolean $IsSpam True if the comment is known as spam
* @property integer $ParentID ID of the parent page / dataobject
* @property boolean $AllowHtml If true, treat $Comment as HTML instead of plain text
* @property string $SecretToken Secret admin token required to provide moderation links between sessions
* @property integer $Depth Depth of this comment in the nested chain
*
* @method HasManyList ChildComments() List of child comments
* @method Member Author() Member object who created this comment
* @method Comment ParentComment() Parent comment this is a reply to
* @package comments
*/
class Comment extends DataObject
{
/**
* {@inheritDoc}
*/
private static $db = array(
'Name' => 'Varchar(200)',
'Comment' => 'Text',
'Email' => 'Varchar(200)',
'URL' => 'Varchar(255)',
'Moderated' => 'Boolean(0)',
'IsSpam' => 'Boolean(0)',
'AllowHtml' => 'Boolean',
'SecretToken' => 'Varchar(255)',
'Depth' => 'Int'
);
/**
* {@inheritDoc}
*/
private static $has_one = array(
'Author' => Member::class,
'ParentComment' => self::class,
'Parent' => DataObject::class
);
/**
* {@inheritDoc}
*/
private static $has_many = array(
'ChildComments' => self::class
);
/**
* {@inheritDoc}
*/
private static $default_sort = '"Created" DESC';
/**
* {@inheritDoc}
*/
private static $defaults = array(
'Moderated' => 0,
'IsSpam' => 0,
);
/**
* {@inheritDoc}
*/
private static $casting = array(
'Title' => 'Varchar',
'ParentTitle' => 'Varchar',
'ParentClassName' => 'Varchar',
'AuthorName' => 'Varchar',
'RSSName' => 'Varchar',
'DeleteLink' => 'Varchar',
'Date' => 'Datetime',
'SpamLink' => 'Varchar',
'HamLink' => 'Varchar',
'ApproveLink' => 'Varchar',
'Permalink' => 'Varchar'
);
/**
* {@inheritDoc}
*/
private static $searchable_fields = array(
'Name',
'Email',
'Comment',
'Created'
);
/**
* {@inheritDoc}
*/
private static $summary_fields = array(
'getAuthorName' => 'Submitted By',
'getAuthorEmail' => 'Email',
'Comment.LimitWordCount' => 'Comment',
'Created' => 'Date Posted',
'Parent.Title' => 'Post',
'IsSpam' => 'Is Spam'
);
/**
* {@inheritDoc}
*/
private static $field_labels = array(
'Author' => 'Author Member'
);
/**
* {@inheritDoc}
*/
private static $table_name = 'Comment';
/**
* {@inheritDoc}
*/
public function onBeforeWrite()
{
parent::onBeforeWrite();
// Sanitize HTML, because its expected to be passed to the template unescaped later
if ($this->AllowHtml) {
$this->Comment = $this->purifyHtml($this->Comment);
}
// Check comment depth
$this->updateDepth();
}
/**
* {@inheritDoc}
*/
public function onBeforeDelete()
{
parent::onBeforeDelete();
// Delete all children
foreach ($this->ChildComments() as $comment) {
$comment->delete();
}
}
/**
* @return Comment_SecurityToken
*/
public function getSecurityToken()
{
return Injector::inst()->createWithArgs(SecurityToken::class, array($this));
}
/**
* Return a link to this comment
*
* @param string $action
*
* @return string link to this comment.
*/
public function Link($action = '')
{
if ($parent = $this->Parent()) {
return $parent->Link($action) . '#' . $this->Permalink();
}
}
/**
* Returns the permalink for this {@link Comment}. Inserted into
* the ID tag of the comment
*
* @return string
*/
public function Permalink()
{
$prefix = $this->getOption('comment_permalink_prefix');
return $prefix . $this->ID;
}
/**
* Translate the form field labels for the CMS administration
*
* @param boolean $includerelations
*
* @return array
*/
public function fieldLabels($includerelations = true)
{
$labels = parent::fieldLabels($includerelations);
$labels['Name'] = _t(__CLASS__ . '.NAME', 'Author name');
$labels['Comment'] = _t(__CLASS__ . '.COMMENT', 'Comment');
$labels['Email'] = _t(__CLASS__ . '.EMAIL', 'Email');
$labels['URL'] = _t(__CLASS__ . '.URL', 'URL');
$labels['IsSpam'] = _t(__CLASS__ . '.ISSPAM', 'Spam?');
$labels['Moderated'] = _t(__CLASS__ . '.MODERATED', 'Moderated?');
$labels['ParentTitle'] = _t(__CLASS__ . '.PARENTTITLE', 'Parent');
$labels['Created'] = _t(__CLASS__ . '.CREATED', 'Date posted');
return $labels;
}
/**
* Get the commenting option
*
* @param string $key
*
* @return mixed Result if the setting is available, or null otherwise
*/
public function getOption($key)
{
// If possible use the current record
$record = $this->Parent();
if (!$record && $this->Parent()) {
// Otherwise a singleton of that record
$record = singleton($this->Parent()->dataClass());
} elseif (!$record) {
// Otherwise just use the default options
$record = singleton(CommentsExtension::class);
}
return ($record instanceof CommentsExtension || $record->hasExtension(CommentsExtension::class))
? $record->getCommentsOption($key)
: null;
}
/**
* Returns the parent {@link DataObject} this comment is attached too
*
* @deprecated 4.0.0 Use $this->Parent() instead
* @return DataObject
*/
public function getParent()
{
// this is wrapped in withNoReplacement() because it's called by ViewableData::__get()
// which looks for a `"get$property"` method, which itself is called by
// AssetControllExtension::findAssets()
Deprecation::withNoReplacement(function () {
Deprecation::notice('4.0.0', 'Use $this->Parent() instead');
});
return $this->BaseClass && $this->ParentID
? DataObject::get_by_id($this->BaseClass, $this->ParentID, true)
: null;
}
/**
* Returns a string to help identify the parent of the comment
*
* @return string
*/
public function getParentTitle()
{
if ($parent = $this->Parent()) {
return $parent->Title ?: ($parent->ClassName . ' #' . $parent->ID);
}
}
/**
* Comment-parent classnames obviously vary, return the parent classname
*
* @return string
*/
public function getParentClassName()
{
return $this->Parent()->getClassName();
}
/**
* {@inheritDoc}
*/
public function castingHelper($field)
{
// Safely escape the comment
if (in_array($field, ['EscapedComment', 'Comment'], true)) {
return $this->AllowHtml ? 'HTMLText' : 'Text';
}
return parent::castingHelper($field);
}
/**
* Content to be safely escaped on the frontend
*
* @return string
*/
public function getEscapedComment()
{
return $this->Comment;
}
/**
* Return whether this comment is a preview (has not been written to the db)
*
* @return boolean
*/
public function isPreview()
{
return !$this->exists();
}
/**
* @todo needs to compare to the new {@link Commenting} configuration API
*
* @param Member $member
* @param array $context
* @return bool
*/
public function canCreate($member = null, $context = [])
{
return false;
}
/**
* Checks for association with a page, and {@link SiteTree->ProvidePermission}
* flag being set to true.
*
* @param Member $member
* @return Boolean
*/
public function canView($member = null)
{
$member = $this->getMember($member);
$extended = $this->extendedCan('canView', $member);
if ($extended !== null) {
return $extended;
}
if (Permission::checkMember($member, 'CMS_ACCESS_CommentAdmin')) {
return true;
}
if ($parent = $this->Parent()) {
return $parent->canView($member)
&& $parent->hasExtension(CommentsExtension::class)
&& $parent->CommentsEnabled;
}
return false;
}
/**
* Checks if the comment can be edited.
*
* @param null|int|Member $member
* @return Boolean
*/
public function canEdit($member = null)
{
$member = $this->getMember($member);
if (!$member) {
return false;
}
$extended = $this->extendedCan('canEdit', $member);
if ($extended !== null) {
return $extended;
}
if (Permission::checkMember($member, 'CMS_ACCESS_CommentAdmin')) {
return true;
}
if ($parent = $this->Parent()) {
return $parent->canEdit($member);
}
return false;
}
/**
* Checks if the comment can be deleted.
*
* @param null|int|Member $member
* @return Boolean
*/
public function canDelete($member = null)
{
$member = $this->getMember($member);
if (!$member) {
return false;
}
$extended = $this->extendedCan('canDelete', $member);
if ($extended !== null) {
return $extended;
}
return $this->canEdit($member);
}
/**
* Resolves Member object.
*
* @param Member|int|null $member
* @return Member|null
*/
protected function getMember($member = null)
{
if (!$member) {
$member = Security::getCurrentUser();
}
if (is_numeric($member)) {
$member = DataObject::get_by_id(Member::class, $member, true);
}
return $member;
}
/**
* Return the authors name for the comment
*
* @return string
*/
public function getAuthorName()
{
if ($this->Name) {
return $this->Name;
} elseif ($author = $this->Author()) {
return $author->getName();
}
}
/**
* Return the comment authors email address
*
* @return string
*/
public function getAuthorEmail()
{
if ($this->Email) {
return $this->Email;
} elseif ($author = $this->Author()) {
return $author->Email;
}
}
/**
* Generate a secure admin-action link authorised for the specified member
*
* @param string $action An action on CommentingController to link to
* @param Member $member The member authorised to invoke this action
*
* @return string
*/
protected function actionLink($action, $member = null)
{
if (!$member) {
$member = Security::getCurrentUser();
}
if (!$member) {
return false;
}
/**
* @todo: How do we handle "DataObject" instances that don't have a Link to reject/spam/delete?? This may
* we have to make CMS a hard dependency instead.
*/
// if (!$this->Parent()->hasMethod('Link')) {
// return false;
// }
$url = Controller::join_links(
Director::baseURL(),
'comments',
$action,
$this->ID
);
// Limit access for this user
$token = $this->getSecurityToken();
return $token->addToUrl($url, $member);
}
/**
* Link to delete this comment
*
* @param Member $member
*
* @return string
*/
public function DeleteLink($member = null)
{
if ($this->canDelete($member)) {
return $this->actionLink('delete', $member);
}
}
/**
* Link to mark as spam
*
* @param Member $member
*
* @return string
*/
public function SpamLink($member = null)
{
if ($this->canEdit($member) && !$this->IsSpam) {
return $this->actionLink('spam', $member);
}
}
/**
* Link to mark as not-spam (ham)
*
* @param Member $member
*
* @return string
*/
public function HamLink($member = null)
{
if ($this->canEdit($member) && $this->IsSpam) {
return $this->actionLink('ham', $member);
}
}
/**
* Link to approve this comment
*
* @param Member $member
*
* @return string
*/
public function ApproveLink($member = null)
{
if ($this->canEdit($member) && !$this->Moderated) {
return $this->actionLink('approve', $member);
}
}
/**
* Mark this comment as spam
*/
public function markSpam()
{
$this->IsSpam = true;
$this->Moderated = true;
$this->write();
$this->extend('afterMarkSpam');
}
/**
* Mark this comment as approved
*/
public function markApproved()
{
$this->IsSpam = false;
$this->Moderated = true;
$this->write();
$this->extend('afterMarkApproved');
}
/**
* Mark this comment as unapproved
*/
public function markUnapproved()
{
$this->Moderated = false;
$this->write();
$this->extend('afterMarkUnapproved');
}
/**
* @return string
*/
public function SpamClass()
{
if ($this->IsSpam) {
return 'spam';
} elseif (!$this->Moderated) {
return 'unmoderated';
} else {
return 'notspam';
}
}
/**
* @return string
*/
public function getTitle()
{
$title = sprintf(_t(__CLASS__ . '.COMMENTBY', 'Comment by %s', 'Name') ?? '', $this->getAuthorName());
if ($parent = $this->Parent()) {
if ($parent->Title) {
$title .= sprintf(' %s %s', _t(__CLASS__ . '.ON', 'on'), $parent->Title);
}
}
return $title;
}
/*
* Modify the default fields shown to the user
*/
public function getCMSFields()
{
$commentField = $this->AllowHtml ? HTMLEditorField::class : TextareaField::class;
$fields = new FieldList(
$this
->obj('Created')
->scaffoldFormField($this->fieldLabel('Created'))
->performReadonlyTransformation(),
TextField::create('Name', $this->fieldLabel('Name')),
$commentField::create('Comment', $this->fieldLabel('Comment')),
EmailField::create('Email', $this->fieldLabel('Email')),
TextField::create('URL', $this->fieldLabel('URL')),
FieldGroup::create(array(
CheckboxField::create('Moderated', $this->fieldLabel('Moderated')),
CheckboxField::create('IsSpam', $this->fieldLabel('IsSpam')),
))
->setTitle(_t(__CLASS__ . '.OPTIONS', 'Options'))
->setDescription(_t(
__CLASS__ . '.OPTION_DESCRIPTION',
'Unmoderated and spam comments will not be displayed until approved'
))
);
// Show member name if given
if (($author = $this->Author()) && $author->exists()) {
$fields->insertAfter(
'Name',
TextField::create('AuthorMember', $this->fieldLabel('Author'), $author->Title)
->performReadonlyTransformation()
);
}
// Show parent comment if given
if (($parent = $this->ParentComment()) && $parent->exists()) {
$fields->push(new HeaderField(
'ParentComment_Title',
_t(__CLASS__ . '.ParentComment_Title', 'This comment is a reply to the below')
));
// Created date
// FIXME - the method setName in DatetimeField is not chainable, hence
// the lack of chaining here
$createdField = $parent
->obj('Created')
->scaffoldFormField($parent->fieldLabel('Created'));
$createdField->setName('ParentComment_Created');
$createdField->setValue($parent->Created);
$createdField->performReadonlyTransformation();
$fields->push($createdField);
// Name (could be member or string value)
$fields->push(
$parent
->obj('AuthorName')
->scaffoldFormField($parent->fieldLabel('AuthorName'))
->setName('ParentComment_AuthorName')
->setValue($parent->getAuthorName())
->performReadonlyTransformation()
);
// Comment body
$fields->push(
$parent
->obj('EscapedComment')
->scaffoldFormField($parent->fieldLabel(self::class))
->setName('ParentComment_EscapedComment')
->setValue($parent->Comment)
->performReadonlyTransformation()
);
}
$this->extend('updateCMSFields', $fields);
return $fields;
}
/**
* @param string $dirtyHtml
*
* @return string
*/
public function purifyHtml($dirtyHtml)
{
if ($service = $this->getHtmlPurifierService()) {
return $service->purify($dirtyHtml);
}
return $dirtyHtml;
}
/**
* @return HTMLPurifier (or anything with a "purify()" method)
*/
public function getHtmlPurifierService()
{
if (!class_exists(HTMLPurifier_Config::class)) {
return null;
}
$config = HTMLPurifier_Config::createDefault();
$allowedElements = (array) $this->getOption('html_allowed_elements');
if (!empty($allowedElements)) {
$config->set('HTML.AllowedElements', $allowedElements);
}
// This injector cannot be set unless the 'p' element is allowed
if (in_array('p', $allowedElements ?? [])) {
$config->set('AutoFormat.AutoParagraph', true);
}
$config->set('AutoFormat.Linkify', true);
$config->set('URI.DisableExternalResources', true);
$config->set('Cache.SerializerPath', TempFolder::getTempFolder(BASE_PATH));
return new HTMLPurifier($config);
}
/**
* Calculate the Gravatar link from the email address
*
* @return string
*/
public function Gravatar()
{
$gravatar = '';
$use_gravatar = $this->getOption('use_gravatar');
if ($use_gravatar) {
$gravatar = 'https://www.gravatar.com/avatar/' . md5(strtolower(trim($this->Email ?? '')));
$gravatarsize = $this->getOption('gravatar_size');
$gravatardefault = $this->getOption('gravatar_default');
$gravatarrating = $this->getOption('gravatar_rating');
$gravatar .= '?' . http_build_query(array(
's' => $gravatarsize,
'd' => $gravatardefault,
'r' => $gravatarrating,
));
}
return $gravatar;
}
/**
* Determine if replies are enabled for this instance
*
* @return boolean
*/
public function getRepliesEnabled()
{
// Check reply option
if (!$this->getOption('nested_comments')) {
return false;
}
// Check if depth is limited
$maxLevel = $this->getOption('nested_depth');
$notSpam = ($this->SpamClass() == 'notspam');
return $notSpam && (!$maxLevel || $this->Depth < $maxLevel);
}
/**
* Proxy for checking whether the has permission to comment on the comment parent.
*
* @param Member $member Member to check
*
* @return boolean
*/
public function canPostComment($member = null)
{
return $this->Parent()
&& $this->Parent()->exists()
&& $this->Parent()->canPostComment($member);
}
/**
* Returns the list of all replies
*
* @return SS_List
*/
public function AllReplies()
{
// No replies if disabled
if (!$this->getRepliesEnabled()) {
return new ArrayList();
}
// Get all non-spam comments
$order = $this->getOption('order_replies_by')
?: $this->getOption('order_comments_by');
$list = $this
->ChildComments()
->sort($order);
$this->extend('updateAllReplies', $list);
return $list;
}
/**
* Returns the list of replies, with spam and unmoderated items excluded, for use in the frontend
*
* @return SS_List
*/
public function Replies()
{
// No replies if disabled
if (!$this->getRepliesEnabled()) {
return new ArrayList();
}
$list = $this->AllReplies();
// Filter spam comments for non-administrators if configured
$parent = $this->Parent();
$showSpam = $this->getOption('frontend_spam') && $parent && $parent->canModerateComments();
if (!$showSpam) {
$list = $list->filter('IsSpam', 0);
}
// Filter un-moderated comments for non-administrators if moderation is enabled
$showUnmoderated = $parent && (
($parent->ModerationRequired === 'None')
|| ($this->getOption('frontend_moderation') && $parent->canModerateComments())
);
if (!$showUnmoderated) {
$list = $list->filter('Moderated', 1);
}
$this->extend('updateReplies', $list);
return $list;
}
/**
* Returns the list of replies paged, with spam and unmoderated items excluded, for use in the frontend
*
* @return PaginatedList
*/
public function PagedReplies()
{
$list = $this->Replies();
// Add pagination
$list = new PaginatedList($list, Controller::curr()->getRequest());
$list->setPaginationGetVar('repliesstart' . $this->ID);
$list->setPageLength($this->getOption('comments_per_page'));
$this->extend('updatePagedReplies', $list);
return $list;
}
/**
* Generate a reply form for this comment
*
* @return Form
*/
public function ReplyForm()
{
// Ensure replies are enabled
if (!$this->getRepliesEnabled()) {
return null;
}
// Check parent is available
$parent = $this->Parent();
if (!$parent || !$parent->exists()) {
return null;
}
// Build reply controller
$controller = CommentingController::create();
$controller->setOwnerRecord($parent);
$controller->setParentClass($parent->ClassName);
$controller->setOwnerController(Controller::curr());
return $controller->ReplyForm($this);
}
/**
* @return string
*/
public function getDate()
{
return $this->Created;
}
/**
* Refresh of this comment in the hierarchy
*/
public function updateDepth()
{
$parent = $this->ParentComment();
if ($parent && $parent->exists()) {
$parent->updateDepth();
$this->Depth = $parent->Depth + 1;
} else {
$this->Depth = 1;
}
}
}