Added login user count colorization (#3651)

Credits to @4144 for his implementation of the feature.

conf/login_athena.conf

@@ -110,6 +110,16 @@ start_limited_time: -1
 // NOTE: Will not work with clients that use <passwordencrypt>
 use_MD5_passwords: no
 
+// User count colorization on login window (requires PACKETVER >= 20170726)
+// Disable colorization and description in general?
+usercount_disable: no
+// Amount of users that will display in green
+usercount_low: 200
+// Amount of users that will display in yellow
+usercount_medium: 500
+// Amount of users that will display in red
+usercount_high: 1000
+
 // Ipban features
 ipban_enable: yes
 // Dynamic password failure ipban system

src/login/login.cpp

@@ -439,6 +439,24 @@ bool login_check_password(const char* md5key, int passwdenc, const char* passwd,
 	}
 }
 
+int login_get_usercount( int users ){
+#if PACKETVER >= 20170726
+	if( login_config.usercount_disable ){
+		return 4; // Removes count and colorization completely
+	}else if( users <= login_config.usercount_low ){
+		return 0; // Green => Smooth
+	}else if( users <= login_config.usercount_medium ){
+		return 1; // Yellow => Normal
+	}else if( users <= login_config.usercount_high ){
+		return 2; // Red => Busy
+	}else{
+		return 3; // Purple => Crowded
+	}
+#else
+	return users;
+#endif
+}
+
 /**
  * Test to determine if an IP come from LAN or WAN.
  * @param ip: ip to check if in auth network
@@ -628,7 +646,15 @@ bool login_config_read(const char* cfgName, bool normal) {
 				nnode->next = login_config.client_hash_nodes;
 				login_config.client_hash_nodes = nnode;
 			}
-		} else if(strcmpi(w1, "chars_per_account") == 0) { //maxchars per account [Sirius]
+		} else if (!strcmpi(w1, "usercount_disable"))
+			login_config.usercount_disable = config_switch(w2);
+		else if (!strcmpi(w1, "usercount_low"))
+			login_config.usercount_low = atoi(w2);
+		else if (!strcmpi(w1, "usercount_medium"))
+			login_config.usercount_medium = atoi(w2);
+		else if (!strcmpi(w1, "usercount_high"))
+			login_config.usercount_high = atoi(w2);
+		else if(strcmpi(w1, "chars_per_account") == 0) { //maxchars per account [Sirius]
 			login_config.char_per_account = atoi(w2);
 			if( login_config.char_per_account <= 0 || login_config.char_per_account > MAX_CHARS ) {
 				if( login_config.char_per_account > MAX_CHARS ) {
@@ -699,6 +725,10 @@ void login_set_defaults() {
 
 	login_config.client_hash_check = 0;
 	login_config.client_hash_nodes = NULL;
+	login_config.usercount_disable = false;
+	login_config.usercount_low = 200;
+	login_config.usercount_medium = 500;
+	login_config.usercount_high = 1000;
 	login_config.char_per_account = MAX_CHARS - MAX_CHAR_VIP - MAX_CHAR_BILLING;
 #ifdef VIP_ENABLE
 	login_config.vip_sys.char_increase = MAX_CHAR_VIP;

src/login/login.hpp

@@ -97,6 +97,11 @@ struct Login_Config {
 	char msgconf_name[256];							/// name of msg_conf config file
 	char lanconf_name[256];							/// name of lan config file
 
+	bool usercount_disable;							/// Disable colorization and description in general?
+	int usercount_low;								/// Amount of users that will display in green
+	int usercount_medium;							/// Amount of users that will display in yellow
+	int usercount_high;								/// Amount of users that will display in red
+
 	int char_per_account;							/// number of characters an account can have
 #ifdef VIP_ENABLE
 	struct {
@@ -228,4 +233,6 @@ int login_mmo_auth_new(const char* userid, const char* pass, const char sex, con
  */
 int login_mmo_auth(struct login_session_data* sd, bool isServer);
 
+int login_get_usercount( int users );
+
 #endif /* LOGIN_HPP */

src/login/loginclif.cpp

@@ -139,7 +139,7 @@ static void logclif_auth_ok(struct login_session_data* sd) {
 		WFIFOL(fd,header+n*size) = htonl((subnet_char_ip) ? subnet_char_ip : ch_server[i].ip);
 		WFIFOW(fd,header+n*size+4) = ntows(htons(ch_server[i].port)); // [!] LE byte order here [!]
 		memcpy(WFIFOP(fd,header+n*size+6), ch_server[i].name, 20);
-		WFIFOW(fd,header+n*size+26) = ch_server[i].users;
+		WFIFOW(fd,header+n*size+26) = login_get_usercount( ch_server[i].users );
 		WFIFOW(fd,header+n*size+28) = ch_server[i].type;
 		WFIFOW(fd,header+n*size+30) = ch_server[i].new_;
 #if PACKETVER >= 20170315