Implement fake QUIT handling via a NOTICE when doing a replay.

Since user QUIT messages don't contain channel names, clients that didn't know which channels a nick was in when receiving a quit message for that nick can't show a per-channel QUIT notification.
Some clients just display the QUIT message in the server status window, others silently ignore it.
Cater for those clients by sending a NOTICE about the QUIT rather than replaying it - assuming the nick isn't still in any of our channels.

1 files changed, 32 insertions, 0 deletions

diff --git a/functions.c b/functions.c
index 6d85d8e..6f8d131 100644
--- a/functions.c
+++ b/functions.c
@@ -1446,6 +1446,38 @@ int updatenickinallchannels(char *nickuserhost, char *newnick, struct channel *c
   return 1;
 }
 
+// Check if "nick" is in any channel or not.
+// Return 1 if it is, or 0 if not.
+int isnickinanychannel(struct channel *channels, int maxchannelcount, char *nick) {
+  debugprint(DEBUG_FULL, "isnickinanychannel(): given '%s'.\n", nick);
+
+  // Make sure the nick has a length of at least one
+  if (strlen(nick) < 1) {
+    debugprint(DEBUG_CRIT, "isnickinanychannel(): nick has no length, returning 0!\n");
+    return 0;
+  }
+
+  // Go through all channels and see if nick is present
+  for (int i = 0; i < maxchannelcount; i++) {
+    // Don't bother checking this channel index if it isn't used
+    if (!channels[i].name[0]) {
+      continue;
+    }
+    // Go through all nicks in channel
+    for (int j = 0; j < MAXCHANNICKS; j++) {
+      // See if the nick is here
+      if (strlen(channels[i].nicks[j]) == strlen(nick) && !strcmp(channels[i].nicks[j], nick)) {
+        // Found it!
+        debugprint(DEBUG_FULL, "isnickinanychannel(): nick '%s' found in channel '%s', returning 1.\n", nick, channels[i].name);
+        return 1;
+      }
+    }
+  }
+
+  debugprint(DEBUG_FULL, "isnickinanychannel(): nick '%s' not found in any channel '%s', returning 0.\n", nick);
+  return 0;
+}
+
 // Populate our channels struct with all nicks in a RPL_NAMREPLY
 // Returns 1 on success or 0 on failure
 int addnamereplytochannel(char *namereply, struct channel *channels, int maxchannelcount) {