<?php
/**
 * Implementation of the attribute object in the document management system
 *
 * @category   DMS
 * @package    SeedDMS_Core
 * @license    GPL 2
 * @version    @version@
 * @author     Uwe Steinmann <uwe@steinmann.cx>
 * @copyright  Copyright (C) 2012 Uwe Steinmann
 * @version    Release: @package_version@
 */

/**
 * Class to represent an attribute in the document management system
 *
 * Attributes are key/value pairs which can be attachted to documents,
 * folders and document content. The number of attributes is unlimited.
 * Each attribute has a value and is related to an attribute definition,
 * which holds the name and other information about the attribute.
 *
 * @see SeedDMS_Core_AttributeDefinition
 *
 * @category   DMS
 * @package    SeedDMS_Core
 * @author     Uwe Steinmann <uwe@steinmann.cx>
 * @copyright  Copyright (C) 2012-2013 Uwe Steinmann
 * @version    Release: @package_version@
 */
class SeedDMS_Core_Attribute { /* {{{ */
	/**
	 * @var integer id of attribute
	 *
	 * @access protected
	 */
	protected $_id;

	/**
	 * @var object SeedDMS_Core_Object folder, document or document content
	 * this attribute belongs to
	 *
	 * @access protected
	 */
	protected $_obj;

	/**
	 * @var object SeedDMS_Core_AttributeDefinition definition of this attribute
	 *
	 * @access protected
	 */
	protected $_attrdef;

	/**
	 * @var mixed value of this attribute
	 *
	 * @access protected
	 */
	protected $_value;

	/**
	 * @var object SeedDMS_Core_DMS reference to the dms instance this attribute belongs to
	 *
	 * @access protected
	 */
	protected $_dms;

	/**
	 * Constructor
	 *
	 * @param integer $id internal id of attribute
	 * @param SeedDMS_Core_Object $obj object this attribute is attached to
	 * @param SeedDMS_Core_AttributeDefinition $attrdef reference to the attribute definition
	 * @param string $value value of the attribute
	 */
	function SeedDMS_Core_Attribute($id, $obj, $attrdef, $value) { /* {{{ */
		$this->_id = $id;
		$this->_obj = $obj;
		$this->_attrdef = $attrdef;
		$this->_value = $value;
		$this->_dms = null;
	} /* }}} */

	/**
	 * Set reference to dms
	 *
	 * @param SeedDMS_Core_DMS $dms
	 */
	function setDMS($dms) { /* {{{ */
		$this->_dms = $dms;
	} /* }}} */

	function getID() { return $this->_id; }

	function getValue() { return $this->_value; }

	/**
	 * Set a value of an attribute
	 * The attribute is deleted completely if the value is the empty string
	 *
	 * @param string $value value to be set
	 * @return boolean true if operation was successfull, otherwise false
	 */
	function setValue($value) { /* {{{*/
		$db = $this->_dms->getDB();

		switch(get_class($this->_obj)) {
			case "SeedDMS_Core_Document":
				if(trim($value) === '')
					$queryStr = "DELETE FROM tblDocumentAttributes WHERE `document` = " . $this->_obj->getID() . " AND `attrdef` = " . $this->_attrdef->getId();
				else
					$queryStr = "UPDATE tblDocumentAttributes SET value = ".$db->qstr($value)." WHERE `document` = " . $this->_obj->getID() .	" AND `attrdef` = " . $this->_attrdef->getId();
				break;
			case "SeedDMS_Core_DocumentContent":
				if(trim($value) === '')
					$queryStr = "DELETE FROM tblDocumentContentAttributes WHERE `content` = " . $this->_obj->getID() . " AND `attrdef` = " . $this->_attrdef->getId();
				else
					$queryStr = "UPDATE tblDocumentContentAttributes SET value = ".$db->qstr($value)." WHERE `content` = " . $this->_obj->getID() .	" AND `attrdef` = " . $this->_attrdef->getId();
				break;
			case "SeedDMS_Core_Folder":
				if(trim($value) === '')
					$queryStr = "DELETE FROM tblFolderAttributes WHERE `folder` = " . $this->_obj->getID() .	" AND `attrdef` = " . $this->_attrdef->getId();
				else
					$queryStr = "UPDATE tblFolderAttributes SET value = ".$db->qstr($value)." WHERE `folder` = " . $this->_obj->getID() .	" AND `attrdef` = " . $this->_attrdef->getId();
				break;
			default:
				return false;
		}
		if (!$db->getResult($queryStr))
			return false;

		$this->_value = $value;

		return true;
	} /* }}} */

	function getAttributeDefinition() { return $this->_attrdef; }

} /* }}} */

/**
 * Class to represent an attribute definition in the document management system
 *
 * Attribute definitions specify the name, type, object type, minimum and
 * maximum values and a value set. The object type determines the object
 * an attribute may be attached to. If the object type is set to object_all
 * the attribute can be used for documents, document content and folders.
 *
 * The type of an attribute specifies the skalar data type.
 *
 * Attributes for which multiple values are allowed must have the
 * multiple flag set to true and specify a value set. A value set
 * is a string consisting of n separated values. The separator is the
 * first char of the value set. A possible value could be '|REV-A|REV-B'
 * If multiple values are allowed, then minvalues and maxvalues may
 * restrict the allowed number of values.
 *
 * @see SeedDMS_Core_Attribute
 *
 * @category   DMS
 * @package    SeedDMS_Core
 * @author     Markus Westphal, Malcolm Cowe, Uwe Steinmann <uwe@steinmann.cx>
 * @copyright  Copyright (C) 2012 Uwe Steinmann
 * @version    Release: @package_version@
 */
class SeedDMS_Core_AttributeDefinition { /* {{{ */
	/**
	 * @var integer id of attribute definition
	 *
	 * @access protected
	 */
	protected $_id;

	/**
	 * @var string name of attribute definition
	 *
	 * @access protected
	 */
	protected $_name;

	/**
	 * @var string object type of attribute definition. This can be one of
	 * type_int, type_float, type_string, or type_boolean.
	 *
	 * @access protected
	 */
	protected $_type;

	/**
	 * @var string type of attribute definition. This can be one of objtype_all,
	 * objtype_folder, objtype_document, or objtype_documentcontent.
	 *
	 * @access protected
	 */
	protected $_objtype;

	/**
	 * @var boolean whether an attribute can have multiple values
	 *
	 * @access protected
	 */
	protected $_multiple;

	/**
	 * @var integer minimum values of an attribute
	 *
	 * @access protected
	 */
	protected $_minvalues;

	/**
	 * @var integer maximum values of an attribute
	 *
	 * @access protected
	 */
	protected $_maxvalues;

	/**
	 * @var string list of possible values of an attribute
	 *
	 * @access protected
	 */
	protected $_valueset;

	/**
	 * @var object SeedDMS_Core_DMS reference to the dms instance this attribute definition belongs to
	 *
	 * @access protected
	 */
	protected $_dms;

	/*
	 * Possible skalar data types of an attribute
	 */
	const type_int = '1';
	const type_float = '2';
	const type_string = '3';
	const type_boolean = '4';

	/*
	 * The object type for which a attribute may be used
	 */
	const objtype_all = '0';
	const objtype_folder = '1';
	const objtype_document = '2';
	const objtype_documentcontent = '3';

	/**
	 * Constructor
	 *
	 * @param integer $id internal id of attribute definition
	 * @param string $name name of attribute
	 * @param integer $objtype type of object for which this attribute definition
	 *        may be used.
	 * @param integer $type skalar type of attribute
	 * @param boolean $multiple set to true if multiple values are allowed
	 * @param integer $minvalues minimum number of values
	 * @param integer $maxvalues maximum number of values
	 * @param string $valueset separated list of allowed values, the first char
	 *        is taken as the separator
	 */
	function SeedDMS_Core_AttributeDefinition($id, $name, $objtype, $type, $multiple, $minvalues, $maxvalues, $valueset) { /* {{{ */
		$this->_id = $id;
		$this->_name = $name;
		$this->_type = $type;
		$this->_objtype = $objtype;
		$this->_multiple = $multiple;
		$this->_minvalues = $minvalues;
		$this->_maxvalues = $maxvalues;
		$this->_valueset = $valueset;
		$this->_separator = '';
		$this->_dms = null;
	} /* }}} */

	/**
	 * Set reference to dms
	 *
	 * @param SeedDMS_Core_DMS $dms
	 */
	function setDMS($dms) { /* {{{ */
		$this->_dms = $dms;
	} /* }}} */

	function getID() { return $this->_id; }

	function getName() { return $this->_name; }

	function setName($name) { /* {{{ */
		$db = $this->_dms->getDB();

		$queryStr = "UPDATE tblAttributeDefinitions SET name =".$db->qstr($name)." WHERE id = " . $this->_id;
		$res = $db->getResult($queryStr);
		if (!$res)
			return false;

		$this->_name = $name;
		return true;
	} /* }}} */

	function getObjType() { return $this->_objtype; }

	function setObjType($objtype) { /* {{{ */
		$db = $this->_dms->getDB();

		$queryStr = "UPDATE tblAttributeDefinitions SET objtype =".intval($objtype)." WHERE id = " . $this->_id;
		$res = $db->getResult($queryStr);
		if (!$res)
			return false;

		$this->_objtype = $objtype;
		return true;
	} /* }}} */

	function getType() { return $this->_type; }

	function setType($type) { /* {{{ */
		$db = $this->_dms->getDB();

		$queryStr = "UPDATE tblAttributeDefinitions SET type =".intval($type)." WHERE id = " . $this->_id;
		$res = $db->getResult($queryStr);
		if (!$res)
			return false;

		$this->_type = $type;
		return true;
	} /* }}} */

	function getMultipleValues() { return $this->_multiple; }

	function setMultipleValues($mv) { /* {{{ */
		$db = $this->_dms->getDB();

		$queryStr = "UPDATE tblAttributeDefinitions SET multiple =".intval($mv)." WHERE id = " . $this->_id;
		$res = $db->getResult($queryStr);
		if (!$res)
			return false;

		$this->_multiple = $mv;
		return true;
	} /* }}} */

	function getMinValues() { return $this->_minvalues; }

	function setMinValues($minvalues) { /* {{{ */
		$db = $this->_dms->getDB();

		$queryStr = "UPDATE tblAttributeDefinitions SET minvalues =".intval($minvalues)." WHERE id = " . $this->_id;
		$res = $db->getResult($queryStr);
		if (!$res)
			return false;

		$this->_minvalues = $minvalues;
		return true;
	} /* }}} */

	function getMaxValues() { return $this->_maxvalues; }

	function setMaxValues($maxvalues) { /* {{{ */
		$db = $this->_dms->getDB();

		$queryStr = "UPDATE tblAttributeDefinitions SET maxvalues =".intval($maxvalues)." WHERE id = " . $this->_id;
		$res = $db->getResult($queryStr);
		if (!$res)
			return false;

		$this->_maxvalues = $maxvalues;
		return true;
	} /* }}} */

	/**
	 * Get the value set as saved in the database
	 *
	 * @return string value set
	 */
	function getValueSet() { /* {{{ */
		return $this->_valueset;
	} /* }}} */

	/**
	 * Get the whole value set as an array
	 *
	 * @return array values of value set or false if the value set has
	 *         less than 2 chars
	 */
	function getValueSetAsArray() { /* {{{ */
		if(strlen($this->_valueset) > 1)
			return explode($this->_valueset[0], substr($this->_valueset, 1));
		else
			return false;
	} /* }}} */

	/**
	 * Get the n'th value of a value set
	 *
	 * @param interger $index
	 * @return string n'th value of value set or false if the index is
	 *         out of range or the value set has less than 2 chars
	 */
	function getValueSetValue($ind) { /* {{{ */
		if(strlen($this->_valueset) > 1) {
			$tmp = explode($this->_valueset[0], substr($this->_valueset, 1));
			if(isset($tmp[$ind]))
				return $tmp[$ind];
			else
				return false;
		} else
			return false;
	} /* }}} */

	/**
	 * Set the value set
	 *
	 * A value set is a list of values allowed for an attribute. The values
	 * are separated by a char which must also be the first char of the
	 * value set string.
	 *
	 * @param string $valueset
	 * @return boolean true if value set could be set, otherwise false
	 */
	function setValueSet($valueset) { /* {{{ */
	/*
		$tmp = array();
		foreach($valueset as $value) {
			$tmp[] = str_replace('"', '""', $value);
		}
		$valuesetstr = implode(",", $tmp);
	*/
		$valuesetstr = $valueset;

		$db = $this->_dms->getDB();

		$queryStr = "UPDATE tblAttributeDefinitions SET valueset =".$db->qstr($valuesetstr)." WHERE id = " . $this->_id;
		$res = $db->getResult($queryStr);
		if (!$res)
			return false;

		$this->_valueset = $valueset;
		$this->_separator = substr($valueset, 0, 1);
		return true;
	} /* }}} */

	/**
	 * Check if the attribute definition is used
	 *
	 * Checks all attributes whether at least one of them referenceѕ
	 * this attribute definition
	 *
	 * @return boolean true if attribute definition is used, otherwise false
	 */
	function isUsed() { /* {{{ */
		$db = $this->_dms->getDB();
		
		$queryStr = "SELECT * FROM tblDocumentAttributes WHERE attrdef=".$this->_id;
		$resArr = $db->getResultArray($queryStr);
		if (is_array($resArr) && count($resArr) == 0) {
			$queryStr = "SELECT * FROM tblFolderAttributes WHERE attrdef=".$this->_id;
			$resArr = $db->getResultArray($queryStr);
			if (is_array($resArr) && count($resArr) == 0) {
				$queryStr = "SELECT * FROM tblDocumentContentAttributes WHERE attrdef=".$this->_id;
				$resArr = $db->getResultArray($queryStr);
				if (is_array($resArr) && count($resArr) == 0) {

					return false;
				}
			}
		}
		return true;
	} /* }}} */

	/**
	 * Remove the attribute definition
	 * Removal is only executed when the definition is not used anymore.
	 *
	 * @return boolean true on success or false in case of an error
	 */
	function remove() { /* {{{ */
		$db = $this->_dms->getDB();

		if($this->isUsed())
			return false;

		// Delete user itself
		$queryStr = "DELETE FROM tblAttributeDefinitions WHERE id = " . $this->_id;
		if (!$db->getResult($queryStr)) return false;

		return true;
	} /* }}} */
} /* }}} */
?>