From e12f9e56f49aee2d97e12b1cc0f87f9528bc8ba8 Mon Sep 17 00:00:00 2001
From: Luke Shumaker <lukeshu@sbcglobal.net>
Date: Mon, 7 Sep 2015 23:58:22 -0600
Subject: implement db_group

---
 src/nshd/hackers_git/db_group.go | 129 +++++++++++++++++++++++++++++++++++----
 1 file changed, 116 insertions(+), 13 deletions(-)

diff --git a/src/nshd/hackers_git/db_group.go b/src/nshd/hackers_git/db_group.go
index 8ce6fa3..2a9a9cf 100644
--- a/src/nshd/hackers_git/db_group.go
+++ b/src/nshd/hackers_git/db_group.go
@@ -1,30 +1,133 @@
 package hackers_git
 
-/*
-import p "nslcd_proto"
+import (
+	p "nslcd_proto"
+	"nslcd_proto/util"
+)
+
+func (o *Hackers) groupByName(name string, users bool) p.Group {
+	members_set, found := o.groups[name]
+	if !found {
+		return p.Group{ID: -1}
+	}
+	gid := name2gid(name)
+	if gid < 0 {
+		return p.Group{ID: -1}
+	}
+	var members_list []string
+	if users {
+		members_list = set2list(members_set)
+	} else {
+		members_list = make([]string, 0)
+	}
+	return p.Group{
+		Name:    name,
+		PwHash:  "x",
+		ID:      gid,
+		Members: members_list,
+	}
+}
+
+func (o *Hackers) groupByGid(gid int32, users bool) p.Group {
+	name, found := gid2name(gid)
+	if !found {
+		return p.Group{ID: -1}
+	}
+	members_set, found := o.groups[name]
+	if !found {
+		return p.Group{ID: -1}
+	}
+	var members_list []string
+	if users {
+		members_list = set2list(members_set)
+	} else {
+		members_list = make([]string, 0)
+	}
+	return p.Group{
+		Name:    name,
+		PwHash:  "x",
+		ID:      gid,
+		Members: members_list,
+	}
+}
 
 func (o *Hackers) Group_ByName(cred p.Ucred, req p.Request_Group_ByName) p.Group_Enumerator {
 	o.lock.RLock()
 	defer o.lock.RUnlock()
-	// TODO
-	return nil
+	group := o.groupByName(req.Name, true)
+	if group.ID < 0 {
+		return util.Group_Ø{}
+	}
+	return util.New_Group_List([]p.Group{group})
 }
+
 func (o *Hackers) Group_ByGid(cred p.Ucred, req p.Request_Group_ByGid) p.Group_Enumerator {
 	o.lock.RLock()
 	defer o.lock.RUnlock()
-	// TODO
-	return nil
+	group := o.groupByGid(req.Gid, true)
+	if group.ID < 0 {
+		return util.Group_Ø{}
+	}
+	return util.New_Group_List([]p.Group{group})
+}
+
+type groupEnumerator struct {
+	groups  []string
+	users   bool
+	backend *Hackers
+	done    bool
 }
+
+func (e *groupEnumerator) GetNext() (*p.Group, error) {
+	for len(e.groups) > 0 {
+		name := e.groups[0]
+		group := e.backend.groupByName(name, e.users)
+		if group.ID >= 0 {
+			return &group, nil
+		}
+	}
+	if !e.done {
+		e.done = true
+		e.backend.lock.RUnlock()
+	}
+	return nil, nil
+}
+
+func (o *groupEnumerator) GenericGetNext() (n *interface{}, err error) {
+	a, err := o.GetNext()
+	if a != nil {
+		b := (interface{})(*a)
+		n = &b
+	}
+	return
+}
+
+// note that the BYMEMBER call returns an empty members list
 func (o *Hackers) Group_ByMember(cred p.Ucred, req p.Request_Group_ByMember) p.Group_Enumerator {
 	o.lock.RLock()
-	defer o.lock.RUnlock()
-	// TODO
-	return nil
+	uid := o.name2uid(req.Member)
+	if uid < 0 {
+		return util.Group_Ø{}
+	}
+	return &groupEnumerator{
+		groups:  o.users[uid].groups,
+		users:   false,
+		backend: o,
+		done:    false,
+	}
 }
+
 func (o *Hackers) Group_All(cred p.Ucred, req p.Request_Group_All) p.Group_Enumerator {
 	o.lock.RLock()
-	defer o.lock.RUnlock()
-	// TODO
-	return nil
+	e := groupEnumerator{
+		groups:  make([]string, len(o.groups)),
+		users:   true,
+		backend: o,
+		done:    false,
+	}
+	i := uint(0)
+	for group, _ := range o.groups {
+		e.groups[i] = group
+	}
+	return &e
 }
-*/
-- 
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