<?php

/**
*
* Class Folder
*
* Represents as folder as the per the folders table in the database
*
* @author Rob Cherry, Jam Warehouse (Pty), Ltd, South Africa
* @date 16 Janurary 2003
* @package lib.foldermanagement
*/

require_once("$default->fileSystemRoot/lib/foldermanagement/PhysicalFolderManagement.inc");

class Folder {
	
	/** folder primary key */
	var $iId;
	/** folder name */
	var $sName;
	/** folder description */
	var $sDescription;
	/** folder parent primary key */
	var $iParentID;
	/** primary key of user who created folder */
	var $iCreatorID;	
	/** primary key of unit to which this folder belongs */
	var $iUnitID;
	/** public status of folder */
	var $bIsPublic;
	/** comma deliminated string of parent ids */
	var $sParentFolderIDs;
	/** forward slash deliminated path from file system root */
	var $sFullPath;
	
	
	/**
	* Folder class constructor
	*
	* @param $sNewName				Folder name
	* @param $sNewDescription		Folder description
	* @param $iNewParentID			Primary key of parent folder
	* @param $iNewCreatorID			Primary key of user who created folder
	* @param $iNewDocumentTypeID	Primary key of document type folder will hold
	* @param $iNewUnitID			Primary key of unit to which folder belongs
	* @param $bNewIsPublic			Folder public status (is the folder public or not?)
	*/
	function Folder($sNewName, $sNewDescription, $iNewParentID, $iNewCreatorID, $iNewUnitID, $bNewIsPublic = false) {
		//id of -1 means that the object has not yet been stored in the database
		$this->iId = -1;
		$this->sName = $sNewName;
		$this->sDescription = $sNewDescription;
		$this->iParentID = $iNewParentID;
		$this->iCreatorID = $iNewCreatorID;		
		$this->iUnitID = $iNewUnitID;
		$this->bIsPublic = $bNewIsPublic;
	}
	
    /**
	* Get the primary key of the current folder object
	*
	* @return integer primary key of folder
	*
	*/
	function getID() {
		return $this->iId;
	}
	
	/** 
	* Get the folder name 
	*
	* @return String folder name
	*/
	function getName() {
		return $this->sName;
	}
	
	/** 
	* Set the folder name 
	*
	* @param $sNewValue		New folder name
	*/
	function setName($sNewValue) {
		$this->sName = $sNewValue;
	}
	
	/**
	* Get the folder description
	*
	* @return String folder description
	*/
	function getDescription() {
		return $this->sDescription;
	}
	
	/**
	* Set the folder description
	*
	* @param $sNewValue		New folder description
	*
	*/
	function setDescription($sNewValue) {
		$this->sDescription = $sNewValue;
	}
	
	/**
	* Get the parent folder primary key
	*
	* @return integer parent folder primary key
	*
	*/
	function getParentID() {
		return $this->iParentID;
	}
	
	/**
	* Set the parent folder primary key
	*
	* @param $iNewValue		New parent folder primary key
	*
	*/
	function setParentID($iNewValue) {
		$this->iParentID = $iNewValue;
	}
	
	/**
	* Get the unit primary key
	*
	* @return integer primary key of unit to which the folder belongs
	*
	*/
	function getUnitID() {
		return $this->iUnitID;
	}
	
	/**
	* Set the unit prinary key 
	*
	* @param $iNewValue		New primary key of unit to which folder belongs
	*
	*/
	function setUnitID($iNewValue) {
		$this->iUnitID = $iNewValue;
	}
		
	/**
	* Get the folder public status
	*
	* @return boolean true if folder is public, false if folder is not
	*
	*/
	function getIsPublic() {
		return $this->bIsPublic;
	}
	
	/**
	* Set the folder public status
	*
	* @param $bNewValue 	New folder public status
	*
	*/
	function setIsPublic($bNewValue) {
		$this->bIsPublic = $bNewValue;
	}
	
	function getFullPath() {
		return $this->sFullPath;
	}
	
	function getParentFolderIDs() {
		return $this->sParentFolderIDs;
	}
	
	/**
	* Generate a comma delimited string containing
	* the parent folder ids
	* 
	* @return String	comma delimited string containing the parent folder ids
	*/
	function generateParentFolderIDS($iFolderID) {
		global $default;
		//if the folder is not the root folder
		if ($iFolderID != 0) {
			$sql = $default->db;
			$sql->query("SELECT parent_id FROM $default->owl_folders_table WHERE ID = $iFolderID");
			$sql->next_record();
			return $this->generateParentFolderIDS($sql->f("parent_id")) . ",$iFolderID";
		}
		return;
		
	}
	
	/**
	* Forward slash deliminated string giving full path of document
	* from file system root url
	* 
	*/
	function generateFullFolderPath($iFolderID) {
		global $default;
		//if the folder is not the root folder 
		if ($iFolderID != 0) {
			$sql = $default->db;
			$sql->query("SELECT name, parent_id FROM $default->owl_folders_table WHERE ID = $iFolderID");
			$sql->next_record();			
			return $this->generateFullFolderPath($sql->f("parent_id")) . "/" . stripslashes($sql->f("name"));
		}
		return;
	}
	
	/**
	* Create the current folder in the database
	*
	* @return boolean true and set $this->iId with new primary key, false otherwise and set $_SESSION["errorMessage"]
	*/
	function create() {
		global $default, $lang_err_database; $lang_err_object_exists;
		//if the object has not already been stored		
		if ($this->iId < 0) {
			$this->sFullPath = $this->generateFullFolderPath($this->iParentID);
			$this->sFullPath = substr($this->sFullPath, 1, strlen($this->sFullPath));
			$this->sParentFolderIDs = $this->generateParentFolderIDS($this->iParentID);
			$this->sParentFolderIDs = substr($this->sParentFolderIDs, 1, strlen($this->sParentFolderIDs));
			$sql = $default->db;
			$result = $sql->query("INSERT INTO " . $default->owl_folders_table . " (name, description, parent_id, creator_id, unit_id, is_public, full_path, parent_folder_ids) " .
						"VALUES ('" . addslashes($this->sName) . "', '" . addslashes($this->sDescription) . "', $this->iParentID, $this->iCreatorID, $this->iUnitID, " . ($this->bIsPublic ? 1 : 0) . ",'" . addslashes($this->sFullPath) . "','" . addslashes($this->sParentFolderIDs) . "')");
			if ($result) {
				$this->iId = $sql->insert_id();
				return true;
			}
			$_SESSION["errorMessage"] = $lang_err_database;
			return false;
		}
		$_SESSION["errorMessage"] = $lang_err_object_exists . "id = " . $this->iId . " table = folders";
		return false;
	}
	
	/**
	* Update the current folder values in the database
	*
	* @return boolean true on successful update, false otherwise and set $_SESSION["errorMessage"]
	*/
	function update($bPathChange) {
		global $default, $lang_err_database, $lang_err_object_key;
		//can only update the object if it has already been stored
		$sOldPath;
		if ($this->iId >= 0) {
			if ($bPathChange){
				$sOldPath = $default->documentRoot . "/" . $this->sFullPath . "/" . $this->sName;
			}
			$sql = $default->db;
			$sQuery = "UPDATE " . $default->owl_folders_table . " SET " .
							"name = '" . addslashes($this->sName) . "', " .
							"description = '" . addslashes($this->sDescription) . "', " .
							"parent_id = $this->iParentID, " .
							"creator_id = $this->iCreatorID, " .
							"unit_id = $this->iUnitID, ";
							if ($bPathChange) {
								$sFullPath = $this->generateFullFolderPath($this->iParentID);								
								$this->sFullPath = substr($sFullPath, 1, strlen($sFullPath));
								$sParentFolderIDs = $this->generateParentFolderIDS($this->iParentID);
								$this->sParentFolderIDs = substr($sParentFolderIDs, 1, strlen($sParentFolderIDs));
								$sQuery .= "parent_folder_ids = '" . addslashes($this->sParentFolderIDs) . "'," .
								  			"full_path = '" . addslashes($this->sFullPath) . "', ";
							}
							$sQuery .= "is_public = " . ($this->bIsPublic ? 1 : 0) . " " .
										"WHERE id = " . $this->iId;
			$result = $sql->query($sQuery);
			if ($result) {
				if ($bPathChange) {
					//must update all the children paths
					$this->updateChildPaths($this->iId, $sql);
					$this->renameFolder($sOldPath);
				}
				return true;
			}
			$_SESSION["errorMessage"] = $lang_err_database;
			return false;			
		}
		$_SESSION["errorMessage"] = $lang_err_object_key;		
	}
	
	function renameFolder($sOldPath) {
		PhysicalFolderManagement::renameFolder($sOldPath, $default->documentRoot . "/" . $this->sFullPath . "/" . $this->sName);
	}
	
	/**
	* When a folder is renamed, we must update
	* the paths of the children in the database
	* 
	*/
	function updateChildPaths($iID, $sql) {
		global $default;
		$sql->query("SELECT id from $default->owl_folders_table WHERE parent_id = $iID");
		while ($sql->next_record()) {
			$oFolder = Folder::get($sql->f("id"));
			$oFolder->update(true);
			$this->updateChildPaths($sql->f("id"), $sql);
		}
		return;
	}
	
	/**
	* Get a folder's sub-folders
	* 
	* @param int	primary key of folder to get children for
	* 
	* @return Array array of child ids
	*/
	function getChildren($iFolderID, $aChildren = array()) {		
		global $default;
		$sql = $default->db;
		$sql->query("SELECT id from $default->owl_folders_table WHERE parent_id = $iFolderID");
		while ($sql->next_record()) {
			$aChildren[count($aChildren)] = $sql->f("id");
			Folder::getChildren($sql->f("id"), & $aChildren);
			//$sChildString .= $sql->f("id") . "," . Folder::getChildren($sql->f("id"));
		}		
		//return $sChildString;
		return $aChildren;
	}
	
	
	/**
	* Delete the current object from the database
	*
	* @return boolean true and reset id to -1 on successful delete, false otherwise and set $_SESSION["errorMessage"]
	*/
	function delete() {
		global $default, $lang_err_database, $lang_err_object_key;
		if ($this->iId >= 0) {
			$sql = $default->db;
			$result = $sql->query("DELETE FROM " . $default->owl_folders_table . " WHERE id = " . $this->iId);
			if ($result) {
				$this->iId = -1;
				return true;
			}
			$_SESSION["errorMessage"] = $lang_err_database;
			return false;
		}
		$_SESSION["errorMessage"] = $lang_err_object_key;
		return false;
		
	}
	
	/**
	* Static function.  
	* Given a folder primary key will create
	* a folder object and populate it with the corresponding
	* database values
	*
	* @param $iFolderID		Primary key of folder to get
	*
	* @return Folder folder object on successful retrieval, false otherwise and set $_SESSION["errorMessage"]
	*/
	function get($iFolderID) {		
		global $default,  $lang_err_object_not_exist;
		$sql = $default->db;		
		$sql->query("SELECT * FROM " . $default->owl_folders_table . " WHERE id = " . $iFolderID);
		if ($sql->next_record()) {
			$oFolder = & new Folder(stripslashes($sql->f("name")), stripslashes($sql->f("description")), $sql->f("parent_id"), $sql->f("creator_id"), $sql->f("unit_id"), $sql->f("is_public"));
            $oFolder->iId = $iFolderID;
			$oFolder->sFullPath = stripslashes($sql->f("full_path"));
			$oFolder->sParentFolderIDs = stripslashes($sql->f("parent_folder_ids"));
			return $oFolder;
		} 
 		$_SESSION["errorMessage"] = $lang_err_object_not_exist . "id = " . $iFolderID . " table = folders";
		return false;
	}
	
	/**
    * Static function
    * Get a list of Documents
    *
    * @param  String  Where clause (not required)
    *
    * @return Array array of Documents objects, false otherwise and set $_SESSION["errorMessage"]
    */
    function getList($sWhereClause = null) {
        global $default, $lang_err_database;
        $aFolderArray;
        settype($aFolderArray, "array");
        $sql = $default->db;
        // TODO: join on sys_deleted
        $result = $sql->query("SELECT * FROM " . $default->owl_folders_table  . (isset($sWhereClause) ? " WHERE " . $sWhereClause : ""));
        if ($result) {
            $iCount = 0;
            while ($sql->next_record()) {
                $oFolder = & Folder::get($sql->f("id"));
                $aFolderArray[$iCount] = $oFolder;
                $iCount++;
            }
            return $aFolderArray;
        }
        $_SESSION["errorMessage"] = $lang_err_database;
        return false;
    }
	
	/**
	* Static function.
	* Get the full path for a folder
	* 
	* @param 	Primary key of folder to generate path for	
	*
	* @return String full path of folder
	*/
	function getFolderPath($iFolderID) {
		global $default;		
		//if the folder has a parent
		/*if (Folder::getParentFolderID($iFolderID) != 0) {			
			$sCurrentPath = Folder::getFolderPath(Folder::getParentFolderID($iFolderID)) . Folder::getFolderName($iFolderID) . "/" . $sCurrentPath;
			return $sCurrentPath;
		}	
		return $default->documentRoot . "/" . Folder::getFolderName($iFolderID) . "/";*/
		$oFolder = Folder::get($iFolderID);
		return $default->documentRoot . "/" . $oFolder->sFullPath . "/" . $oFolder->getName() . "/";
	}

	/**
     * Static function.
     * Get the full path for a folder as an array
     * 
     * @param int primary key of folder to generate path for	
     *
     * @return array full path of folder as an array of folderIDs
     */
    function getFolderPathNamesAsArray($iFolderID) {
		global $default;		
		$oFolder = Folder::get($iFolderID);
		$aPathArray;
		if (strlen($oFolder->sFullPath) > 0) {
			if (strlen($oFolder->sFullPath) > 1) {				
				$aPathArray = explode("/",$oFolder->sFullPath);				
			} else {
				$aPathArray = array($oFolder->sFullPath);
			}
			$aPathArray[count($aPathArray)] = $oFolder->getName();
		} else {
			$aPathArray = array($oFolder->getName());
		}
		return $aPathArray;
    }
	
	/**
     * Static function.
     * Get the full path for a folder as an array
     * 
     * @param int primary key of folder to generate path for	
     *
     * @return array full path of folder as an array of folderIDs
     */
    function getFolderPathAsArray($iFolderID) {
		global $default;		
		$oFolder = Folder::get($iFolderID);
		$aPathArray;
		if (strlen($oFolder->sParentFolderIDs) > 0) {
			if (strlen($oFolder->sParentFolderIDs) > 1) {				
				$aPathArray = explode(",",$oFolder->sParentFolderIDs);				
			} else {
				$aPathArray = array($oFolder->sParentFolderIDs);
			}
			$aPathArray[count($aPathArray)] = $oFolder->getID();
		} else {			
			$aPathArray = array($oFolder->getID());
		}		
		return $aPathArray;
    }
	
	/**
	* Static function.
	* Get the path for a folder that will be displated to the user
	* 
	* @param 	Primary key of folder to generate path for	
	*
	* @return String full path of folder
	*/
	function getFolderDisplayPath($iFolderID) {
		global $default;		
		//if the folder has a parent		
		$oFolder = Folder::get($iFolderID);
		return (strlen($oFolder->sFullPath) > 0 ?  $oFolder->sFullPath . " > " : "")  . $oFolder->getName();
	}
	
	/**
	* Static function
	* Get the primary key of the parent folder
	*
	* @param $iFolderID		Primary key of folder to get parent for
	*
	* @return integer primary key of parent folder
	*/
	function getParentFolderID($iFolderID) {		
		if ($iFolderID != 0) {
			global $default;		
			$sql = $default->db;
			$sql->query("SELECT parent_id FROM " . $default->owl_folders_table . " WHERE id = " . $iFolderID);
			$sql->next_record();		
			return $sql->f("parent_id");
		}
		return 0;
	}
	
	/**
	* Static function
	* Gets the default document type for a folder (where default is simply the first one)
	*
	* @param $iFolderID
	*
	* @return integer document type primary key, false otherwise and set $_SESSION["errorMessage"]
	*/
	function getDefaultFolderDocumentType($iFolderID) {
		global $default, $lang_err_database;
		if (Folder::folderExistsID($iFolderID)) {
			$sql = $default->db;
			$sql->query("SELECT document_type_id FROM " . $default->owl_folder_doctypes_table . " WHERE folder_id = " . $iFolderID);			
			if ($sql->next_record()) {
				return $sql->f("document_type_id");
			}
			$_SESSION["errorMessage"] = $lang_err_database;
			
		}
		//error message set by Folder::folderExists
		return false;
	}
	
	/**
	* Static function
	* Checks if a given folder already exists using the folder name
	*
	* @param $sName			Name of folder
	* @param $iParentID		Primary key of parent folder
	*
	* @return	true if the folder exists, false otherwise and set $_SESSION["errorMessage"]
	*/
	function folderExistsName($sName, $iParentID) {
		$sName = addslashes($sName);
		global $default, $lang_err_folder_exist;
		$sql = $default->db;
		$sql->query("SELECT * FROM " . $default->owl_folders_table . " WHERE name = '" . $sName . "' AND parent_id = " . $iParentID);
		if ($sql->next_record()) {
			return true;
		}
		$_SESSION["errorMessage"] = $lang_err_folder_exist . $sName . " parent_id " . $iParentID;
		return false;
	}
	
	/**
	* Checks if a given folder already exists using the folder name
	*
	* @param $iFolderID			Primary key of folder
	*
	* @return	true if the folder exists, false otherwise and set $_SESSION["errorMessage"]
	*/
	function folderExistsID($iFolderID) {
		global $default, $lang_err_folder_exist;
		$sql = $default->db;
		$sql->query("SELECT * FROM " . $default->owl_folders_table . " WHERE id = " . $iFolderID);
		if ($sql->next_record()) {
			return true;
		}
		$_SESSION["errorMessage"] =$lang_err_folder_exist . "id " . $iFolderID;
		return false;
	}
	
	/**
	* Get the folder name using the primary key
	*
	* @param int primary key of folder to get name for
	*
	* @return String name on success, false otherwise and set $_SESSION["errorMessage"]
	*/
	function getFolderName($iFolderID) {
		global $default, $lang_err_database;
		$sql = $default->db;
		$sql->query("SELECT name FROM " . $default->owl_folders_table . " WHERE id = " . $iFolderID);
		if ($sql->next_record()) {
			return stripslashes($sql->f("name"));
		}
		$_SESSION["errorMessage"] = $lang_err_database;
		return false;
	}
	
	/**
	* Get the folder id using the folder name
	*
	* @param string the name of the folder to get the ID for
	*
	* @return int name on success, false otherwise and set $_SESSION["errorMessage"]
	*/
	function getFolderID($sFolderName) {
		global $default, $lang_err_database;
		$sql = $default->db;
		$sql->query("SELECT id FROM " . $default->owl_folders_table . " WHERE name = '" . addslashes($sFolderName) . "'");
		if ($sql->next_record()) {
			return $sql->f("id");
		}
		$_SESSION["errorMessage"] = $lang_err_database;
		return false;
	}    
	
	/**
	* Checks if a document type is already
	* linked to a folder
	* 
	*/
	function folderIsLinkedToDocType($iFolderID, $iDocTypeID) {
		global $default;
		$sql = $default->db;
		$sql->query("SELECT id FROM $default->owl_folder_doctypes_table WHERE document_type_id = $iDocTypeID and folder_id = $iFolderID");
		if ($sql->next_record()) {
			return true;
		}
		return false;
	}
}

?>