From d0243769ab7208eccfe75a0df8160a9d2f94a664 Mon Sep 17 00:00:00 2001
From: Neil Blakey-Milner <nbm@knowledgetree.com>
Date: Tue, 2 Aug 2005 13:10:30 +0000
Subject: [PATCH] Allow groups to be members and parents of other groups in the model.

---
 lib/groups/Group.inc | 73 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+), 0 deletions(-)

diff --git a/lib/groups/Group.inc b/lib/groups/Group.inc
index 1dc9750..1cbd0ed 100644
--- a/lib/groups/Group.inc
+++ b/lib/groups/Group.inc
@@ -200,6 +200,22 @@ class Group extends KTEntity {
         return $aMembers;
     }
 
+    function &getMemberGroups() {
+        global $default;
+        $sQuery = "SELECT member_group_id FROM $default->groups_groups_table WHERE parent_group_id = ?";
+        $aParams = array($this->getID());
+        $aGroupIDs = DBUtil::getResultArrayKey(array($sQuery, $aParams), "member_group_id");
+        $aMembers = array();
+        foreach ($aGroupIDs as $iGroupID) {
+            $oGroup = Group::get($iGroupID);
+            if ($oGroup !== false) {
+                $aMembers[] = $oGroup;
+            }
+        }
+        return $aMembers;
+    }
+
+
     function delete() {
         global $default;
 
@@ -270,6 +286,63 @@ class Group extends KTEntity {
         return true;
     }
     // }}}
+
+    // {{{ addMemberGroup
+    function addMemberGroup($oGroup) {
+        global $default;
+        if ($this->hasMemberGroup($oGroup)) {
+            return true;
+        }
+        $aParams = array(
+            "parent_group_id" => $this->getID(),
+            "member_group_id" => $oGroup->getID(),
+        );
+        $res = DBUtil::autoInsert($default->groups_groups_table, $aParams);
+        if (PEAR::isError($res)) {
+            return $res;
+        }
+        return true;
+    }
+    // }}}
+    //
+    // {{{ removeMemberGroup
+    function removeMemberGroup($oGroup) {
+        global $default;
+        if (!$this->hasMemberGroup($oGroup)) {
+            return true;
+        }
+        $aParams = array(
+            "parent_group_id" => $this->getID(),
+            "member_group_id" => $oGroup->getID(),
+        );
+        $res = DBUtil::whereDelete($default->groups_groups_table, $aParams);
+        if (PEAR::isError($res)) {
+            return $res;
+        }
+        if ($this->hasMember($oGroup)) {
+            return PEAR::raiseError("Tried to remove member from database, apparently successfully, but hasMember thinks they're still members?");
+        }
+        return true;
+    }
+    // }}}
+
+    // {{{ hasMemberGroup
+    function hasMemberGroup($oGroup) {
+        global $default;
+
+        $sQuery = "SELECT COUNT(*) AS number_of_entries FROM $default->groups_groups_table
+            WHERE parent_group_id = ? AND member_group_id = ?";
+        $aParams = array($this->getID(), $oGroup->getID());
+        $res = (int)DBUtil::getOneResultKey(array($sQuery, $aParams), "number_of_entries");
+        if (PEAR::isError($res)) {
+            return $res;
+        }
+        if ($res === 1) {
+            return true;
+        }
+        return false;
+    }
+    // }}}
 }
 
 /**
--
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