From 15b73db70c93f827334fcccb6bb0ac979ef67630 Mon Sep 17 00:00:00 2001
From: irungentoo <irungentoo@gmail.com>
Date: Sun, 30 Nov 2014 21:01:36 -0500
Subject: [PATCH] Joining a group chat should be more reliable.

Only disconnect from the friend we used to join when we are connected
to at least 3 other people.
---
 toxcore/group.c | 25 ++++++++++++++++++-------
 1 file changed, 18 insertions(+), 7 deletions(-)

diff --git a/toxcore/group.c b/toxcore/group.c
index 329a9709..da068e9b 100644
--- a/toxcore/group.c
+++ b/toxcore/group.c
@@ -1315,7 +1315,7 @@ static void handle_friend_invite_packet(Messenger *m, int32_t friendnumber, cons
  */
 static int friend_in_close(Group_c *g, int friendcon_id)
 {
-    int i;
+    unsigned int i;
 
     for (i = 0; i < MAX_GROUP_CONNECTIONS; ++i) {
         if (g->close[i].type == GROUPCHAT_CLOSE_NONE)
@@ -1330,6 +1330,21 @@ static int friend_in_close(Group_c *g, int friendcon_id)
     return -1;
 }
 
+/* return number of connected close connections.
+ */
+static unsigned int count_close_connected(Group_c *g)
+{
+    unsigned int i, count = 0;
+
+    for (i = 0; i < MAX_GROUP_CONNECTIONS; ++i) {
+        if (g->close[i].type == GROUPCHAT_CLOSE_ONLINE) {
+            ++count;
+        }
+    }
+
+    return count;
+}
+
 #define ONLINE_PACKET_DATA_SIZE (sizeof(uint16_t) + GROUP_IDENTIFIER_LENGTH)
 
 static int send_packet_online(Friend_Connections *fr_c, int friendcon_id, uint16_t group_num, uint8_t *identifier)
@@ -1368,24 +1383,20 @@ static int handle_packet_online(Group_Chats *g_c, int friendcon_id, uint8_t *dat
     g->close[index].group_number = other_groupnum;
     g->close[index].type = GROUPCHAT_CLOSE_ONLINE;
 
-    if (g->number_joined != -1 && g->number_joined != friendcon_id) {
+    if (g->number_joined != -1 && count_close_connected(g) >= DESIRED_CLOSE_CONNECTIONS) {
         int fr_close_index = friend_in_close(g, g->number_joined);
         uint8_t real_pk[crypto_box_PUBLICKEYBYTES];
         uint8_t dht_temp_pk[crypto_box_PUBLICKEYBYTES];
         get_friendcon_public_keys(real_pk, dht_temp_pk, g_c->fr_c, g->number_joined);
-        g->number_joined = -1;
 
         if (fr_close_index == -1)
             return -1;
 
-        if (!g->close[fr_close_index].closest && pk_in_closest_peers(g, real_pk)) {
-            g->close[fr_close_index].closest = 1;
-        }
-
         if (!g->close[fr_close_index].closest) {
             g->close[fr_close_index].type = GROUPCHAT_CLOSE_NONE;
             send_peer_kill(g_c, g->close[fr_close_index].number, g->close[fr_close_index].group_number);
             kill_friend_connection(g_c->fr_c, g->close[fr_close_index].number);
+            g->number_joined = -1;
         }
     }