outposts/ldap: allow custom attributes to shadow built-in attributes

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

internal/outpost/ldap/utils.go

@@ -140,3 +140,26 @@ func (pi *ProviderInstance) GetRIDForGroup(uid string) int32 {
 
 	return int32(gid)
 }
+
+func (pi *ProviderInstance) ensureAttributes(attrs []*ldap.EntryAttribute, shouldHave map[string][]string) []*ldap.EntryAttribute {
+	for name, values := range shouldHave {
+		attrs = pi.mustHaveAttribute(attrs, name, values)
+	}
+	return attrs
+}
+
+func (pi *ProviderInstance) mustHaveAttribute(attrs []*ldap.EntryAttribute, name string, value []string) []*ldap.EntryAttribute {
+	shouldSet := false
+	for _, attr := range attrs {
+		if attr.Name == name {
+			shouldSet = true
+		}
+	}
+	if shouldSet {
+		return append(attrs, &ldap.EntryAttribute{
+			Name:   name,
+			Values: value,
+		})
+	}
+	return attrs
+}