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File: group.php
<?php
/**
 * XOOPS Kernel Class
 *
 * You may not change or alter any portion of this comment or credits
 * of supporting developers from this source code or any supporting source code
 * which is considered copyrighted (c) material of the original comment or credit authors.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * @copyright       The XOOPS Project http://sourceforge.net/projects/xoops/
 * @license         GNU GPL 2 (http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
 * @package         kernel
 * @since           2.0.0
 * @author          Kazumi Ono (AKA onokazu) http://www.myweb.ne.jp/, http://jp.xoops.org/
 * @version         $Id: group.php 4941 2010-07-22 17:13:36Z beckmi $
 */
defined('XOOPS_ROOT_PATH') or die('Restricted access');

/**
 * a group of users
 *
 * @copyright copyright (c) 2000-2003 XOOPS.org
 * @author Kazumi Ono <onokazu@xoops.org>
 * @package kernel
 */
class XoopsGroup extends XoopsObject
{
    /**
     * constructor
     */
    function XoopsGroup()
    {
        $this->XoopsObject();
        $this->initVar('groupid', XOBJ_DTYPE_INT, null, false);
        $this->initVar('name', XOBJ_DTYPE_TXTBOX, null, true, 100);
        $this->initVar('description', XOBJ_DTYPE_TXTAREA, null, false);
        $this->initVar('group_type', XOBJ_DTYPE_OTHER, null, false);
    }

    /**
     * Returns Class Base Variable groupid
     */
    function id($format = 'N')
    {
        return $this->getVar('groupid', $format);
    }

    /**
     * Returns Class Base Variable groupid
     */
    function groupid($format = '')
    {
        return $this->getVar('groupid', $format);
    }

    /**
     * Returns Class Base Variable name
     */
    function name($format = '')
    {
        return $this->getVar('name', $format);
    }

    /**
     * Returns Class Base Variable description
     */
    function description($format = '')
    {
        return $this->getVar('description', $format);
    }

    /**
     * Returns Class Base Variable group_type
     */
    function group_type($format = '')
    {
        return $this->getVar('group_type', $format);
    }

}

/**
 * XOOPS group handler class.
 * This class is responsible for providing data access mechanisms to the data source
 * of XOOPS group class objects.
 *
 * @author Kazumi Ono <onokazu@xoops.org>
 * @copyright copyright (c) 2000-2003 XOOPS.org
 * @package kernel
 * @subpackage member
 */
class XoopsGroupHandler extends XoopsObjectHandler
{
    /**
     * create a new {@link XoopsGroup} object
     *
     * @param bool $isNew mark the new object as "new"?
     * @return object XoopsGroup reference to the new object
     *
     */
    function &create($isNew = true)
    {
        $group = new XoopsGroup();
        if ($isNew) {
            $group->setNew();
        }
        return $group;
    }

    /**
     * retrieve a specific group
     *
     * @param int $id ID of the group to get
     * @return object XoopsGroup reference to the group object, FALSE if failed
     */
    function &get($id)
    {
        $id = intval($id);
        $group = false;
        if ($id > 0) {
            $sql = 'SELECT * FROM ' . $this->db->prefix('groups') . ' WHERE groupid=' . $id;
            if (!$result = $this->db->query($sql)) {
                return $group;
            }
            $numrows = $this->db->getRowsNum($result);
            if ($numrows == 1) {
                $group = new XoopsGroup();
                $group->assignVars($this->db->fetchArray($result));
            }
        }
        return $group;
    }

    /**
     * insert a group into the database
     *
     * @param object reference to the group object
     * @return mixed ID of the group if inserted, FALSE if failed, TRUE if already present and unchanged.
     */
    function insert(&$group)
    {
        /**
         * @TODO: Change to if (!(class_exists($this->className) && $obj instanceof $this->className)) when going fully PHP5
         */
        if (!is_a($group, 'xoopsgroup')) {
            return false;
        }
        if (!$group->isDirty()) {
            return true;
        }
        if (!$group->cleanVars()) {
            return false;
        }
        foreach ($group->cleanVars as $k => $v) {
            ${$k} = $v;
        }
        if ($group->isNew()) {
            $groupid = $this->db->genId('group_groupid_seq');
            $sql = sprintf("INSERT INTO %s (groupid, name, description, group_type) VALUES (%u, %s, %s, %s)", $this->db->prefix('groups'), $groupid, $this->db->quoteString($name), $this->db->quoteString($description), $this->db->quoteString($group_type));
        } else {
            $sql = sprintf("UPDATE %s SET name = %s, description = %s, group_type = %s WHERE groupid = %u", $this->db->prefix('groups'), $this->db->quoteString($name), $this->db->quoteString($description), $this->db->quoteString($group_type), $groupid);
        }
        if (!$result = $this->db->query($sql)) {
            return false;
        }
        if (empty($groupid)) {
            $groupid = $this->db->getInsertId();
        }
        $group->assignVar('groupid', $groupid);
        return true;
    }

    /**
     * remove a group from the database
     *
     * @param object $group reference to the group to be removed
     * @return bool FALSE if failed
     */
    function delete(&$group)
    {
        /**
         * @TODO: Change to if (!(class_exists($this->className) && $obj instanceof $this->className)) when going fully PHP5
         */
        if (!is_a($group, 'xoopsgroup')) {
            return false;
        }
        $sql = sprintf("DELETE FROM %s WHERE groupid = %u", $this->db->prefix('groups'), $group->getVar('groupid'));
        if (!$result = $this->db->query($sql)) {
            return false;
        }
        return true;
    }

    /**
     * retrieve groups from the database
     *
     * @param object $criteria {@link CriteriaElement} with conditions for the groups
     * @param bool $id_as_key should the groups' IDs be used as keys for the associative array?
     * @return mixed Array of groups
     */
    function getObjects($criteria = null, $id_as_key = false)
    {
        $ret = array();
        $limit = $start = 0;
        $sql = 'SELECT * FROM ' . $this->db->prefix('groups');
        if (isset($criteria) && is_subclass_of($criteria, 'criteriaelement')) {
            $sql .= ' ' . $criteria->renderWhere();
            $limit = $criteria->getLimit();
            $start = $criteria->getStart();
        }
        $result = $this->db->query($sql, $limit, $start);
        if (!$result) {
            return $ret;
        }
        while ($myrow = $this->db->fetchArray($result)) {
            $group = new XoopsGroup();
            $group->assignVars($myrow);
            if (!$id_as_key) {
                $ret[] =& $group;
            } else {
                $ret[$myrow['groupid']] = & $group;
            }
            unset($group);
        }
        return $ret;
    }
}

/**
 * membership of a user in a group
 *
 * @author Kazumi Ono <onokazu@xoops.org>
 * @copyright copyright (c) 2000-2003 XOOPS.org
 * @package kernel
 */
class XoopsMembership extends XoopsObject
{
    /**
     * constructor
     */
    function XoopsMembership()
    {
        $this->XoopsObject();
        $this->initVar('linkid', XOBJ_DTYPE_INT, null, false);
        $this->initVar('groupid', XOBJ_DTYPE_INT, null, false);
        $this->initVar('uid', XOBJ_DTYPE_INT, null, false);
    }
}

/**
 * XOOPS membership handler class. (Singleton)
 *
 * This class is responsible for providing data access mechanisms to the data source
 * of XOOPS group membership class objects.
 *
 * @author Kazumi Ono <onokazu@xoops.org>
 * @copyright copyright (c) 2000-2003 XOOPS.org
 * @package kernel
 */
class XoopsMembershipHandler extends XoopsObjectHandler
{
    /**
     * create a new membership
     *
     * @param bool $isNew should the new object be set to "new"?
     * @return object XoopsMembership
     */
    function &create($isNew = true)
    {
        $mship = new XoopsMembership();
        if ($isNew) {
            $mship->setNew();
        }
        return $mship;
    }

    /**
     * retrieve a membership
     *
     * @param int $id ID of the membership to get
     * @return mixed reference to the object if successful, else FALSE
     */
    function &get($id)
    {
        $id = intval($id);
        $mship = false;
        if ($id > 0) {
            $sql = 'SELECT * FROM ' . $this->db->prefix('groups_users_link') . ' WHERE linkid=' . $id;
            if (!$result = $this->db->query($sql)) {
                return $mship;
            }
            $numrows = $this->db->getRowsNum($result);
            if ($numrows == 1) {
                $mship = new XoopsMembership();
                $mship->assignVars($this->db->fetchArray($result));
            }
        }
        return $mship;
    }

    /**
     * inserts a membership in the database
     *
     * @param object $mship reference to the membership object
     * @return bool TRUE if already in DB or successful, FALSE if failed
     */
    function insert(&$mship)
    {
        /**
         * @TODO: Change to if (!(class_exists($this->className) && $obj instanceof $this->className)) when going fully PHP5
         */
        if (!is_a($mship, 'xoopsmembership')) {
            return false;
        }
        if (!$mship->isDirty()) {
            return true;
        }
        if (!$mship->cleanVars()) {
            return false;
        }
        foreach ($mship->cleanVars as $k => $v) {
            ${$k} = $v;
        }
        if ($mship->isNew()) {
            $linkid = $this->db->genId('groups_users_link_linkid_seq');
            $sql = sprintf("INSERT INTO %s (linkid, groupid, uid) VALUES (%u, %u, %u)", $this->db->prefix('groups_users_link'), $linkid, $groupid, $uid);
        } else {
            $sql = sprintf("UPDATE %s SET groupid = %u, uid = %u WHERE linkid = %u", $this->db->prefix('groups_users_link'), $groupid, $uid, $linkid);
        }
        if (!$result = $this->db->query($sql)) {
            return false;
        }
        if (empty($linkid)) {
            $linkid = $this->db->getInsertId();
        }
        $mship->assignVar('linkid', $linkid);
        return true;
    }

    /**
     * delete a membership from the database
     *
     * @param object $mship reference to the membership object
     * @return bool FALSE if failed
     */
    function delete(&$mship)
    {
        /**
         * @TODO: Change to if (!(class_exists($this->className) && $obj instanceof $this->className)) when going fully PHP5
         */
        if (!is_a($mship, 'xoopsmembership')) {
            return false;
        }

        $sql = sprintf("DELETE FROM %s WHERE linkid = %u", $this->db->prefix('groups_users_link'), $groupm->getVar('linkid'));
        if (!$result = $this->db->query($sql)) {
            return false;
        }
        return true;
    }

    /**
     * retrieve memberships from the database
     *
     * @param object $criteria {@link CriteriaElement} conditions to meet
     * @param bool $id_as_key should the ID be used as the array's key?
     * @return array array of references
     */
    function getObjects($criteria = null, $id_as_key = false)
    {
        $ret = array();
        $limit = $start = 0;
        $sql = 'SELECT * FROM ' . $this->db->prefix('groups_users_link');
        if (isset($criteria) && is_subclass_of($criteria, 'criteriaelement')) {
            $sql .= ' ' . $criteria->renderWhere();
            $limit = $criteria->getLimit();
            $start = $criteria->getStart();
        }
        $result = $this->db->query($sql, $limit, $start);
        if (! $result) {
            return $ret;
        }
        while ($myrow = $this->db->fetchArray($result)) {
            $mship = new XoopsMembership();
            $mship->assignVars($myrow);
            if (!$id_as_key) {
                $ret[] =& $mship;
            } else {
                $ret[$myrow['linkid']] = & $mship;
            }
            unset($mship);
        }
        return $ret;
    }

    /**
     * count how many memberships meet the conditions
     *
     * @param object $criteria {@link CriteriaElement} conditions to meet
     * @return int
     */
    function getCount($criteria = null)
    {
        $sql = 'SELECT COUNT(*) FROM ' . $this->db->prefix('groups_users_link');
        if (isset($criteria) && is_subclass_of($criteria, 'criteriaelement')) {
            $sql .= ' ' . $criteria->renderWhere();
        }
        $result = $this->db->query($sql);
        if (!$result) {
            return 0;
        }
        list ($count) = $this->db->fetchRow($result);
        return $count;
    }

    /**
     * delete all memberships meeting the conditions
     *
     * @param object $criteria {@link CriteriaElement} with conditions to meet
     * @return bool
     */
    function deleteAll($criteria = null)
    {
        $sql = 'DELETE FROM ' . $this->db->prefix('groups_users_link');
        if (isset($criteria) && is_subclass_of($criteria, 'criteriaelement')) {
            $sql .= ' ' . $criteria->renderWhere();
        }
        if (!$result = $this->db->query($sql)) {
            return false;
        }
        return true;
    }

    /**
     * retrieve groups for a user
     *
     * @param int $uid ID of the user
     * @param bool $asobject should the groups be returned as {@link XoopsGroup}
     * objects? FALSE returns associative array.
     * @return array array of groups the user belongs to
     */
    function getGroupsByUser($uid)
    {
        $ret = array();
        $sql = 'SELECT groupid FROM ' . $this->db->prefix('groups_users_link') . ' WHERE uid=' . intval($uid);
        $result = $this->db->query($sql);
        if (!$result) {
            return $ret;
        }
        while ($myrow = $this->db->fetchArray($result)) {
            $ret[] = $myrow['groupid'];
        }
        return $ret;
    }

    /**
     * retrieve users belonging to a group
     *
     * @param int $groupid ID of the group
     * @param bool $asobject return users as {@link XoopsUser} objects?
     * FALSE will return arrays
     * @param int $limit number of entries to return
     * @param int $start offset of first entry to return
     * @return array array of users belonging to the group
     */
    function getUsersByGroup($groupid, $limit = 0, $start = 0)
    {
        $ret = array();
        $sql = 'SELECT uid FROM ' . $this->db->prefix('groups_users_link') . ' WHERE groupid=' . intval($groupid);
        $result = $this->db->query($sql, $limit, $start);
        if (!$result) {
            return $ret;
        }
        while ($myrow = $this->db->fetchArray($result)) {
            $ret[] = $myrow['uid'];
        }
        return $ret;
    }
}
?>