<?php
/**
 * Management of Liberty Content
 *
 * @package  liberty
 * @version  $Header$
 * @author   spider <spider@steelsun.com>
 */

/**
 * required setup
 */
namespace Bitweaver\Liberty;

use Bitweaver\BitBase;
use Bitweaver\KernelTools;

define( 'BITCOMMENT_CONTENT_TYPE_GUID', 'bitcomment' );

/**
 * Handles all comments which are actual content objects
 *
 * @package liberty
 */

class LibertyComment extends LibertyMime {
	public $mCommentId;
	public $mRootObj;

	function __construct($pCommentId = null, $pContentId = null, $pInfo = null) {
		parent::__construct();
		$this->registerContentType( BITCOMMENT_CONTENT_TYPE_GUID, [
			'content_type_guid' => BITCOMMENT_CONTENT_TYPE_GUID,
			'content_name'      => 'Comment',
			'handler_class'     => 'LibertyComment',
			'handler_package'   => 'liberty',
			'handler_file'      => 'LibertyComment.php',
			'maintainer_url'    => 'https://www.bitweaver.org',
		] );
		$this->mCommentId = (int)$pCommentId;
		$this->mContentId = (int)$pContentId;
		$this->mInfo = $pInfo;
		$this->mContentTypeGuid = BITCOMMENT_CONTENT_TYPE_GUID;
		$this->mAdminContentPerm = 'p_liberty_admin_comments';
		$this->mRootObj = null;

		if ($this->mCommentId || $this->mContentId) {
			$this->loadComment();
		}
	}

	public function __sleep() {
		return array_merge( parent::__sleep(), [ 'mCommentId', 'mRootObj' ] );
	}

	function loadComment() {
		global $gBitSystem, $gBitUser;
		if (!$this->verifyId($this->mCommentId) && !$this->verifyId($this->mContentId)) {
			return null;
		}

		if ($this->mCommentId) {
			$mid = 'WHERE lcom.`comment_id` = ?';
			$bindVars = [ $this->mCommentId ];
		} else {
			$mid = 'WHERE lc.`content_id` = ?';
			$bindVars = [ $this->mContentId ];
		}

		$joinSql = $selectSql = $whereSql = '';
		$this->getServicesSql( 'content_load_sql_function', $selectSql, $joinSql, $whereSql, $bindVars, $this );

		$sql = "SELECT lcom.*, lc.*, uu.`email`, uu.`real_name`, uu.`login` $selectSql
				FROM `".BIT_DB_PREFIX."liberty_comments` lcom
					LEFT OUTER JOIN `".BIT_DB_PREFIX."liberty_content` lc ON (lcom.`content_id` = lc.`content_id`)
					LEFT OUTER JOIN `".BIT_DB_PREFIX."users_users` uu ON (lc.`user_id` = uu.`user_id`) $joinSql
				$mid $whereSql";
		if( $row = $this->mDb->getRow( $sql, $bindVars ) ) {
			$this->mInfo = $row;
			$this->mContentId = $row['content_id'];
			$this->mCommentId = $row['comment_id'];

			// call parent load for attachment data like other Mime derived classes, only need it if feature is active or admin
			if( $gBitSystem->isFeatureActive( 'comments_allow_attachments' ) || $gBitUser->isAdmin() ){
				LibertyMime::load();
			}
		}
		return !empty($this->mInfo) ? count( $this->mInfo ) : 0;
	}

	function verifyComment(&$pParamHash) {
		global $gBitUser, $gBitSystem;

		/* should be unnecessary
		if( !empty( $_REQUEST['format_guid'] )) {
			$storeRow['format_guid'] = $_REQUEST['format_guid'];
		}
		*/

		$pParamHash['content_id'] = BitBase::verifyId($this->mContentId) ? $this->mContentId : null;

		if( empty( $pParamHash['root_id'] ) && !empty( $pParamHash['comments_parent_id'] ) ) {
			 $pParamHash['root_id'] = $pParamHash['comments_parent_id'];
		}

		if (!$pParamHash['root_id']) {
			$this->mErrors['root_id'] = "Missing root id for comment";
		}

		if( empty( $pParamHash['parent_id'] ) ){
			$pParamHash['parent_id'] = BitBase::verifyId($this->mInfo['parent_id']) ? $this->mInfo['parent_id'] : (!BitBase::verifyId($pParamHash['post_comment_reply_id']) ? $pParamHash['comments_parent_id'] : $pParamHash['post_comment_reply_id']);
		}

		if (!$pParamHash['parent_id']) {
			$this->mErrors['parent_id'] = "Missing parent id for comment";
		}

		if (empty($pParamHash['anon_name'])) {
			$pParamHash['anon_name']=null;
		}

		if( !@$gBitUser->verifyCaptcha( $pParamHash['captcha'] ) ) {
			$this->mErrors['store'] = KernelTools::tra( 'Incorrect validation code' );
		}

		if( !empty( $pParamHash['comment_title'] ) ){
			$pParamHash['title'] = $pParamHash['comment_title'];
		}

		if( !empty( $pParamHash['comment_data'] ) ){
			$pParamHash['edit'] = $pParamHash['comment_data'];
		}

		if( empty( $pParamHash['edit'] ) ) {
			$this->mErrors['store'] = KernelTools::tra( 'Your comment was empty.' );
		} elseif( !$gBitUser->hasPermission( 'p_liberty_trusted_editor' ) && ($linkCount = preg_match_all( '/http\:\/\//', $pParamHash['edit'], $links )) > $gBitSystem->getConfig( 'liberty_unstrusted_max_http_in_content', 0 ) ) {
			$this->mErrors['store'] = KernelTools::tra( 'Links are not allowed.' );
		} else {
			$dupeQuery = "SELECT `data` FROM `".BIT_DB_PREFIX."liberty_content` lc INNER JOIN `".BIT_DB_PREFIX."liberty_comments` lcom ON (lc.`content_id`=lcom.`content_id`) WHERE `user_id`=? AND `content_type_guid`='".BITCOMMENT_CONTENT_TYPE_GUID."' AND `ip`=? AND lcom.`root_id`=? ORDER BY `created` DESC";
			if( $lastPostData = $this->mDb->getOne( $dupeQuery, [ $gBitUser->mUserId, $_SERVER['REMOTE_ADDR'], $pParamHash['root_id'] ] ) ) {
				if( empty( $this->mCommentId ) && trim( $lastPostData ) == trim( $pParamHash['edit'] ) ) {
					$this->mErrors['store'] = KernelTools::tra( 'Duplicate comment.' );
				}
			}
		}

		// verify attachments are allowed on comments
		if( ( isset( $pParamHash['_files_override'] ) || !empty( $_FILES ) ) && !$gBitSystem->isFeatureActive( 'comments_allow_attachments' ) ) {
			$this->mErrors['comment_attachments'] = KernelTools::tra( 'Files can not be uploaded with comments.' );
		}

		// if we have an error we get them all by checking parent classes for additional errors
		if( count( $this->mErrors ) > 0 ){
			parent::verify( $pParamHash );
		}

		return count($this->mErrors) == 0;
	}

	function storeComment( &$pParamHash ) {
		$this->StartTrans();
		if( $this->verifyComment($pParamHash) && LibertyMime::store( $pParamHash ) ) {
			if (!$this->mCommentId) {
				$this->mCommentId = $this->mDb->GenID( 'liberty_comment_id_seq');

				if (!empty($pParamHash['parent_id'])) {
					$parentComment = new LibertyComment(null,$pParamHash['parent_id']);
				}
				$parent_sequence_forward = '';
				$parent_sequence_reverse = '';
				if (!empty($parentComment->mInfo['thread_forward_sequence'])) {
					$parent_sequence_forward = $parentComment->mInfo['thread_forward_sequence'];
					$parent_sequence_reverse = $parentComment->mInfo['thread_reverse_sequence'];
				}
				// if nesting level > 25 deep, put it on level 25
				if (strlen($parent_sequence_forward) > 10*24) {
					$parent_sequence_forward = substr($parent_sequence_forward,0,10*24);
				}

				$this->mInfo['thread_forward_sequence'] = $parent_sequence_forward . sprintf("%09d.",$this->mCommentId);
				$this->mInfo['thread_reverse_sequence'] = strtr($parent_sequence_forward . sprintf("%09d.",$this->mCommentId),
						'0123456789', '9876543210', );

				$sql = "INSERT INTO `".BIT_DB_PREFIX."liberty_comments` (`comment_id`, `content_id`, `parent_id`, `root_id`, `anon_name`, `thread_forward_sequence`, `thread_reverse_sequence`) VALUES (?,?,?,?,?,?,?)";

				$this->mDb->query($sql, [
					$this->mCommentId,
					$pParamHash['content_id'],
					$pParamHash['parent_id'],
					$pParamHash['root_id'],
					$pParamHash['anon_name'],
					$this->mInfo['thread_forward_sequence'],
					$this->mInfo['thread_reverse_sequence'],
				]);
				$this->mInfo['parent_id'] = $pParamHash['parent_id'];
				$this->mInfo['content_id'] = $pParamHash['content_id'];
				$this->mInfo['root_id'] = $pParamHash['root_id'];
				$this->mContentId = $pParamHash['content_id'];
			} else {
				$sql = "UPDATE `".BIT_DB_PREFIX."liberty_comments` SET `parent_id` = ?, `content_id`= ? WHERE `comment_id` = ?";
				$this->mDb->query($sql, [ $pParamHash['parent_id'], $pParamHash['content_id'], $this->mCommentId ]);
				$this->mInfo['parent_id'] = $pParamHash['parent_id'];
				$this->mInfo['content_id'] = $pParamHash['content_id'];
				$this->mContentId = $pParamHash['content_id'];
			}
			$this->invokeServices( 'comment_store_function', $pParamHash );

		}

		$this->CompleteTrans();
		return count($this->mErrors) == 0;
	}

	// This is a highly specialized method only used for emailing list synchronization. If you don't know anything about this, just move along and live in bliss
	// (Hint: see mailing list integreation in boards)
	function storeMessageId( $pMessageId ) {
		if( $this->isValid() ) {
			$this->mDb->query( "UPDATE `".BIT_DB_PREFIX."liberty_comments` SET `message_guid`=? WHERE `content_id`=?", [ $pMessageId, $this->mContentId ] );
		}
	}

	// delete a single comment
	public function deleteComment(): bool {
		global $gBitSystem;
		$ret = false;
		if( $this->isValid() ) {
			$this->StartTrans();

			if( $gBitSystem->isPackageActive( 'boards' ) ) {
				// due to foreign key constraints, this has to go in the base class of BitBoardPost
				$sql = "DELETE FROM `".BIT_DB_PREFIX."boards_posts` WHERE `comment_id` = ?";
				$rs = $this->mDb->query($sql, [ $this->mCommentId ] );
//				$query = "DELETE FROM `".BIT_DB_PREFIX."boards_topics` WHERE `parent_id` = ?";
//				$result = $this->mDb->query( $query, [ $this->getField( 'content_id' ) ] );
			}

			$sql = "DELETE FROM `".BIT_DB_PREFIX."liberty_comments` WHERE `comment_id` = ?";
			$rs = $this->mDb->query($sql, [ $this->mCommentId ]);

			/*
			 * TODO: figureout why this is even here. Mime should handle this and it needs to pass in mandatory attachmentId
			 * Slated to delete for now  - wjames5
			 */
			/*
			if (method_exists($this,'expungeMetaData')) {
				$this->expungeMetaData();
			}
			*/

			if( LibertyMime::expunge() ) {
				$ret = true;
				$this->CompleteTrans();
			} else {
				$this->mDb->RollbackTrans();
			}
		}
		return $ret;
	}

	//delete the comment and all of its children
	//it should be possible to do this in a single query using the materialized path
	//this is the code from the old function which needs to be revised
	// 1) change name
	// 2) use materialized path to cut query count and eliminate recursion

	public function expunge(): bool {
		global $gBitSystem;
		if( $this->isValid() ) {
			$this->StartTrans();
			$sql = "SELECT `comment_id` FROM `".BIT_DB_PREFIX."liberty_comments` WHERE `parent_id` = ?";
			$rows = $this->mDb->getAll($sql, [ $this->mContentId ]);

			foreach ($rows as $row) {
				$comment = new LibertyComment($row['comment_id']);
				$comment->expunge();
			}

			if( $gBitSystem->isPackageActive( 'boards' ) ) {
				// due to foreign key constraints, this has to go in the base class of BitBoardPost
				$sql = "DELETE FROM `".BIT_DB_PREFIX."boards_posts` WHERE `comment_id` = ?";
				$rs = $this->mDb->query($sql, [ $this->mCommentId ] );
				$query = "DELETE FROM `".BIT_DB_PREFIX."boards_topics` WHERE `parent_id` = ?";
				$result = $this->mDb->query( $query, [ $this->getField( 'content_id' ) ] );
			}

			$sql = "DELETE FROM `".BIT_DB_PREFIX."liberty_comments` WHERE `comment_id` = ?";
			$rs = $this->mDb->query($sql, [ $this->mCommentId ]);

			/*
			 * TODO: figureout why this is even here. Mime should handle this and it needs to pass in mandatory attachmentId
			 * Slated to delete for now  - wjames5
			 */
			/*
			if (method_exists($this,'expungeMetaData')) {
				$this->expungeMetaData();
			}
			*/

			if( LibertyMime::expunge() ) {
				$this->CompleteTrans();
			} else {
				$this->mDb->RollbackTrans();
			}
		}
		return true;
	}

	function userCanEdit() {
		global $gBitUser, $gBitSystem;
		$ret = false;

		// check the allowed edit time limit - we'll use it later
		$withinEditTime = false;
		if ( $gBitSystem->getConfig( 'comments_edit_minutes', 60 ) * 60 + $this->getField( 'created' ) > time() ) {
			$withinEditTime = true;
		}
		if( $gBitUser->isRegistered() ) {
			/* get the hash of the users perms rather than call hasUserPermission which
			 * always returns true for owner which interferes with trying to time limit editing
			 */
			$checkPerms = $this->getUserPermissions();
			$ret = !empty( $checkPerms['p_liberty_edit_comments'] ) ||
					 !empty( $checkPerms['p_liberty_admin_comments'] ) ||
					 $gBitUser->hasPermission( 'p_liberty_admin_comments' ) ||
					 $gBitUser->mUserId == $this->mInfo['user_id'] && $withinEditTime;
		} elseif( $this->mInfo['user_id'] == ANONYMOUS_USER_ID ) {
			$ret = $_SERVER['REMOTE_ADDR']==$this->mInfo['ip'] && $withinEditTime;
		}
		return $ret;
	}

	function userCanUpdate( $pRootContent=null ) {
		return $this->userCanEdit() || ($pRootContent && ($pRootContent->hasUserPermission( 'p_liberty_edit_comments' ) || $pRootContent->hasUserPermission( 'p_liberty_admin_comments' )));
	}

	/**
	* @param string pLinkText name of
	* @param array pParamHash different possibilities depending on derived class
	* @return string the link to display the page.
	*/
	public static function getDisplayUrlFromHash( &$pParamHash ) {
		$ret = null;
		if( BitBase::verifyId( $pParamHash['root_id'] ) && $viewContent = LibertyBase::getLibertyObject( $pParamHash['root_id'] ) ) {
			// pass in cooment hash to the url func incase the root package needs to do something fancy
			$viewContent->mInfo['comment'] = $pParamHash;
			$ret = $viewContent->getDisplayUrl().( @static::verifyId( $pParamHash['content_id'] ) ? "#comment_".$pParamHash['content_id'] : '' );
		} elseif( BitBase::verifyId( $pParamHash['content_id'] ) ) {
			$ret = parent::getDisplayUrlFromHash( $pParamHash );
			$ret .= "#comment_{$pParamHash['content_id']}";
		}

		return $ret;
	}

	//generate a URL to directly access and display a single comment and the associated root content
	public function getDirectUrlFromHash( $pParamHash=null ) {
			if( empty( $pParamHash ) ) {
				$pParamHash = &$this->mInfo;
			}
			$ret = null;
			if( !empty( $pParamHash['root_id'] ) && $viewContent = LibertyBase::getLibertyObject( $pParamHash['root_id'] ) ) {
					$ret = $viewContent->getDisplayUrl();
					if ( strstr($ret, '?') ) {
						$ret .= "&";
					}
					else {
						$ret .= "?";
					}
					$ret .= "view_comment_id=" . $pParamHash['content_id'] .  "#comment_".$pParamHash['content_id'];
			}
			return $ret;
	}

	public static function getDisplayLinkFromHash( &$pParamHash, $pLinkText=null, $pAnchor=null ) {
		$anchor = '';
		// Override default title with something comment centric
		if( empty( $pLinkText ) ) {
			$pLinkText = KernelTools::tra( 'Comment' );
		}
		if( BitBase::verifyId( $pParamHash['content_id'] )) {
			$anchor = "&view_comment_id=".$pParamHash['content_id']."#comment_{$pParamHash['content_id']}";
		}
		return parent::getDisplayLinkFromHash( $pParamHash, $pLinkText, $anchor );
	}

	function getList( &$pParamHash ) {
		global $gBitSystem, $gLibertySystem;
		if ( !isset( $pParamHash['sort_mode']) or $pParamHash['sort_mode'] == '' ){
			$pParamHash['sort_mode'] = 'created_desc';
		}
		if( empty( $pParamHash['max_records'] ) ) {
			$pParamHash['max_records'] = $gBitSystem->getConfig( 'max_records' );
		}
		LibertyContent::prepGetList( $pParamHash );
		$sort_mode = $this->mDb->convertSortmode($pParamHash['sort_mode']);

		$joinSql = $whereSql = $selectSql = '';
		$bindVars = $ret = [];

		$pParamHash['include_comments'] = true;
		$this->getServicesSql( 'content_list_sql_function', $selectSql, $joinSql, $whereSql, $bindVars, null, $pParamHash );

		if ( !empty( $pParamHash['root_content_type_guid'] ) ) {
			if( is_string( $pParamHash['root_content_type_guid'] ) ) {
				$pParamHash['root_content_type_guid'] = [ $pParamHash['root_content_type_guid'] ];
			} elseif( is_array( $pParamHash['root_content_type_guid'] ) ) {
				$contentTypes = array_keys( $gLibertySystem->mContentTypes );
				$max = count( $pParamHash['root_content_type_guid'] );
				$guidSql = '';
				for( $i = 0; $i < $max; $i++ ) {
					if( in_array( $pParamHash['root_content_type_guid'][$i], $contentTypes ) ) {
						if( strlen( $guidSql ) ) {
							$guidSql .= ' OR ';
						}
						$guidSql .= " rlc.`content_type_guid`=? ";
						$bindVars[] = $pParamHash['root_content_type_guid'][$i];
					}
				}
				$whereSql .= " AND ( $guidSql )";
			}
		}

		if ( !empty( $pParamHash['content_type_guid'] ) ) {
			$whereSql .= " AND rlc.`content_type_guid`=? ";
			$bindVars[] = $pParamHash['content_type_guid'];
		}

		if ( !empty( $pParamHash['user_id'] ) ) {
			$whereSql .= " AND ptc.`user_id`=? ";
			$bindVars[] = $pParamHash['user_id'];
		}

		if ( !empty( $pParamHash['created_ge'] ) ) {
			$whereSql .= " AND lc.`created`>=? ";
			$bindVars[] = $pParamHash['created_ge'];
		}

		// left outer join on root so updater works

		$query = "SELECT
					lcom.`comment_id`,
					lc.`content_id`,
					lcom.`parent_id`,
					lcom.`anon_name`,
					lcom.`root_id`,
					lc.`title` AS `content_title`,
					rlc.`title` AS `root_content_title`,
					lc.`created`,
					lc.`data`,
					lc.`last_modified` as `last_modified`,
					lc.`title` as `title`,
					ptc.`content_type_guid` as `parent_content_type_guid`,
					rlc.`content_type_guid` as `root_content_type_guid`,
					lc.`content_type_guid`,
					uu.`login` AS `creator_user`,
					uu.`login`,
					uu.`real_name`,
					uu.`user_id`
					$selectSql
				  FROM `".BIT_DB_PREFIX."liberty_comments` lcom
				  		INNER JOIN `".BIT_DB_PREFIX."liberty_content` lc ON( lcom.`content_id`=lc.`content_id` )
			      		INNER JOIN `".BIT_DB_PREFIX."users_users` uu ON( uu.`user_id`=lc.`user_id`)
						LEFT OUTER JOIN `".BIT_DB_PREFIX."liberty_content` rlc ON( rlc.`content_id`=lcom.`root_id` )
						$joinSql, `".BIT_DB_PREFIX."liberty_content` ptc
				  WHERE lcom.`parent_id`=ptc.`content_id` $whereSql
				  ORDER BY $sort_mode";
		if( $result = $this->mDb->query( $query, $bindVars, $pParamHash['max_records'], $pParamHash['offset'] )) {
			while( $row = $result->FetchRow() ) {
				$row['display_link'] = $this->getDisplayLink( $row['content_title'], $row );
				$row['display_url'] = $this->getDisplayUrlFromHash( $row );
				$row['direct_url'] = $this->getDirectUrlFromHash( $row );
				if (!empty($pParamHash['parse'])) {
					$row['parsed_data'] = self::parseDataHash( $row );
				}
				$ret[] = $row;
			}
		}

		return $ret;
	}

	/**
	* Fill title with date if available
	*
	* This will normally be overwriten by extended classes to provide
	* an appropriate title title string
	* @param array mInfo type hash of data to be used to provide base data
	* @return string Descriptive title for the object
	*/
	public static function getTitleFromHash( &$pHash, $pDefault=true ) {
		global $gBitweaverExtension;

		$ret = null;
		if( !empty( $pHash['title'] ) ) {
			$ret = $pHash['title'];
		} elseif( !empty( $pHash['created'] ) ) {
			$ret = $gBitweaverExtension->smarty_modifier_bit_short_date( $pHash['created'] );
		} elseif( !empty( $pHash['content_name'] ) ) {
			$ret = $pHash['content_name'];
		}
		return $ret;
	}

	function getNumComments($pContentId = null) {
		$bindVars = null;
		if (!$pContentId && $this->mContentId) {
			$mid = '=?';
			$bindVars = [ $this->mContentId ];
		} elseif (is_array($pContentId)) {
			$mid = 'in ('.implode(',', array_fill(0, count( $pContentId ), '?')).')';
			$bindVars = $pContentId;
		} elseif ($pContentId) {
			$mid = '=?';
			$bindVars = [ $pContentId ];
		}
		$commentCount = 0;

		$joinSql = $selectSql = $whereSql = '';

		/* brute force call to liberty_content_list_sql
		 * for status enforcement
		 *
		 * here we call liberty_content_list_sql which has a
		 * restriction to enforce content_status_id. we could
		 * have called the full list_sql service, but that
		 * would be overkill for just getting a count.
		 */
		if ( !is_array($pContentId) ){
			$sqlHash = liberty_content_list_sql( $this, null );
			if( !empty( $sqlHash['select_sql'] ) ) {
				$selectSql .= $sqlHash['select_sql'];
			}
			if( !empty( $sqlHash['join_sql'] ) ) {
				$joinSql .= $sqlHash['join_sql'];
			}
			if( !empty( $sqlHash['where_sql'] ) ) {
				$whereSql .= $sqlHash['where_sql'];
			}
			if( !empty( $sqlHash['bind_vars'] ) ) {
				$bindVars = is_array( $bindVars )
					? $bindVars = array_merge( $bindVars, $sqlHash['bind_vars'] )
					: $sqlHash['bind_vars'];
			}
		}

		if ($bindVars) {
			$sql = "SELECT count(*) as comment_count $selectSql
					FROM `".BIT_DB_PREFIX."liberty_comments` lcom
						INNER JOIN `".BIT_DB_PREFIX."liberty_content` lc ON (lcom.`content_id` = lc.`content_id`) $joinSql
					WHERE lcom.`root_id` $mid $whereSql";
			$commentCount = $this->mDb->getOne($sql, $bindVars);
		}
		return $commentCount;
	 }

	// used for direct access to view a single comment
	// see usage in: liberty/comments_inc.php
	// there ought to be a better way to do this...
	function getNumComments_upto($pCommentId = null, $pContentId = null) {

		$comment = new LibertyComment($pCommentId, $pContentId);

		#assume flat mode
		$comment_fields = $comment->mInfo;
		$created = $comment_fields['created'];
		$contentId = $comment_fields['root_id'];

		$commentCount = 0;
		if ($contentId) {
			$sql = "SELECT count(*)
					FROM `".BIT_DB_PREFIX."liberty_comments` tc LEFT OUTER JOIN
					 `".BIT_DB_PREFIX."liberty_content` tcn
					 ON (tc.`content_id` = tcn.`content_id`)
				    where tc.`root_id` =? and `created` < ?";
			$commentCount = $this->mDb->getOne($sql, [ $contentId, $created ]);
		}
		return $commentCount;
	}

	// Returns a hash containing the comment tree of comments related to this content
	function getComments( $pContentId = null, $pMaxComments = null, $pOffset = null, $pSortOrder = null, $pDisplayMode = null ) {
		if( $pDisplayMode != "flat" ) {
			$pSortOrder = $pSortOrder == "commentDate_asc"
				? 'thread_asc'
				: 'thread_desc';
		}

		$contentId = null;
		$ret = [];
		if (!$pContentId && $this->mContentId) {
			$contentId = $this->mContentId;
		} elseif ($pContentId) {
			$contentId = $pContentId;
		}

		$mid = "";

		$sort_order = "ASC";
		$mid = 'created ASC';
		if (!empty($pSortOrder)) {
			if ($pSortOrder == 'commentDate_desc') {
				$mid = 'created DESC';
			} else if ($pSortOrder == 'commentDate_asc') {
				$mid = 'created ASC';
			} elseif ($pSortOrder == 'thread_asc') {
				$mid = 'thread_forward_sequence  ASC';
			// thread newest first is harder...
			} elseif ($pSortOrder == 'thread_desc') {
				$mid = 'thread_reverse_sequence  ASC';
			} else {
				$mid = $this->mDb->convertSortmode( $pSortOrder );
			}
		}
		$mid = 'order by ' . $mid;

		$bindVars = [];
		if (is_array( $pContentId ) ) {
			$mid2 = 'in ('.implode(',', array_fill(0, count( $pContentId ), '?')).')';
			$bindVars = $pContentId;
			$select1 = ', lcp.`content_type_guid` as parent_content_type_guid, lcp.`title` as parent_title ';
			$join1 = " LEFT OUTER JOIN `".BIT_DB_PREFIX."liberty_content` lcp ON (lcp.`content_id` = lcom.`parent_id`) ";
		} elseif ($pContentId) {
			$mid2 = '=?';
			$bindVars = [ $pContentId ];
			$select1 = '';
			$join1 = '';
		}

		$joinSql = $selectSql = $whereSql = '';
		$pListHash = [ 'content_id' => $contentId, 'max_records' => $pMaxComments, 'offset' => $pOffset, 'sort_mode' => $pSortOrder, 'display_mode' => $pDisplayMode, 'has_comment_view_perm' => true ];
		$this->getServicesSql( 'content_list_sql_function', $selectSql, $joinSql, $whereSql, $bindVars, $this, $pListHash );

		if ($pContentId) {
			$sql = "SELECT lcom.`comment_id`, lcom.`parent_id`, lcom.`root_id`, lcom.`thread_forward_sequence`, lcom.`thread_reverse_sequence`, lcom.`anon_name`, lc.*, uu.`email`, uu.`real_name`, uu.`login` $selectSql $select1
					FROM `".BIT_DB_PREFIX."liberty_comments` lcom
						LEFT OUTER JOIN `".BIT_DB_PREFIX."liberty_content` lc ON (lcom.`content_id` = lc.`content_id`)
						LEFT OUTER JOIN `".BIT_DB_PREFIX."users_users` uu ON (lc.`user_id` = uu.`user_id`) $joinSql $join1
				    WHERE lcom.root_id $mid2 $whereSql $mid";
			$flat_comments = [];
			if( $result = $this->mDb->query( $sql, $bindVars, $pMaxComments, $pOffset ) ) {
				while( $row = $result->FetchRow() ) {
					$row['parsed_data'] = self::parseDataHash( $row );
					$row['level'] = substr_count ( $row['thread_forward_sequence'], '.' ) - 1;
					$c = new LibertyComment();
					$c->mInfo=$row;
					$c->mRootObj = $this->getRootObj();
					$row['is_editable'] = $c->userCanUpdate( $c->mRootObj );

					global $gBitSystem;
					if( $gBitSystem->isFeatureActive( 'comments_allow_attachments' ) ){
						// get attachments for each comment
						global $gLibertySystem;
						$query = "SELECT * FROM `".BIT_DB_PREFIX."liberty_attachments` la WHERE la.`content_id`=? ORDER BY la.`pos` ASC, la.`attachment_id` ASC";
						if( $result2 = $this->mDb->query( $query,[ (int)$row['content_id'] ])) {
							while( $row2 = $result2->fetchRow() ) {
								if( $func = $gLibertySystem->getPluginFunction( $row2['attachment_plugin_guid'], 'load_function', 'mime' )) {
									// we will pass the preferences by reference that the plugin can easily update them
									if( empty( $row['storage'][$row2['attachment_id']] )) {
										$row['storage'][$row2['attachment_id']] = [];
									}
									$row['storage'][$row2['attachment_id']] = $func( $row2, $row['storage'][$row2['attachment_id']] );
								} else {
									print "No load_function for ".$row2['attachment_plugin_guid'];
								}
							}
						}
						// end get attachements for each comment
					}

					$flat_comments[$row['content_id']] = $row;
				}
			}

			# now select comments wanted
			$ret = $flat_comments;

			}
		return $ret;
	}

	function getQuoted() {
		$data = $this->mInfo['data'];
		$pattern = '/\{quote .*\}(.*)\{\/quote\}/i';
		$replacement = '';
		$data = preg_replace($pattern, $replacement, $data);
		return '{quote format_guid="'.$this->mInfo['format_guid'].'" comment_id="'.$this->mCommentId.'" user="'.$this->mInfo['login'].'"}'.trim($data).'{/quote}';
	}

	// Basic formatting for quoting comments
	function quoteComment($commentData) {
		$ret = '> '.$commentData;
		$ret = mb_eregi_replace("\n", "\n>", $ret);
		return $ret;
	}

	function getRootObj(){
		if ( !is_object( $this->mRootObj ) && !empty( $this->mInfo['root_id'] ) ){
			if ( $obj = LibertyBase::getLibertyObject( $this->mInfo['root_id'] ) ) {
				$this->mRootObj = $obj;
			}
		}
		return $this->mRootObj;
	}
}