From 93e530320e024e9119fb8717459ef618086c5839 Mon Sep 17 00:00:00 2001
From: Luke Bratch <luke@bratch.co.uk>
Date: Thu, 16 May 2019 23:40:43 +0100
Subject: Correctly handle nicks changing and actually track users PARTing
 channels.

Also change nickuserhost to store the leading colon (:) since it's always needed (so far).
---
 functions.c | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

(limited to 'functions.c')

diff --git a/functions.c b/functions.c
index e43f31c..6034250 100644
--- a/functions.c
+++ b/functions.c
@@ -150,3 +150,35 @@ void extractnickfromprefix(char *string) {
 
   printf("extractnickfromprefix(): finishing with '%s', strlen: %zd.\n", string, strlen(string));
 }
+
+// Update an existing nickuserhost string with a new nick
+void updatenickuserhost(char *nickuserhost, char *nick) {
+  printf("updatenickuserhost(): updating '%s' with '%s'.\n", nickuserhost, nick);
+
+  // Position of bang
+  int bangpos = -1;
+
+  // Find the bang
+  for (size_t i = 0; i < strlen(nickuserhost); i++) {
+    if (nickuserhost[i] == '!') {
+      printf("Found bang at position %ld!\n", i);
+      bangpos = i;
+      break;
+    }
+  }
+
+  if (bangpos == -1) {
+    printf("No bang found in existing nickuserhost, quitting!\n");
+    return;
+  }
+
+  // Make a new string combining the nick nick and the old nickuserhost + the offset of the bang
+  char newstr[MAXDATASIZE];
+  snprintf(newstr, MAXDATASIZE, "%s%s", nick, nickuserhost + bangpos);
+  newstr[strlen(nickuserhost) - bangpos + strlen(nick)] = '\0';
+
+  // Copy back to source string
+  strcpy(nickuserhost, newstr);
+
+  printf("updatenickuserhost(): new nickuserhost '%s', length '%ld'.\n", nickuserhost, strlen(nickuserhost));
+}
-- 
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