3 files changed, 21 insertions, 0 deletions
diff --git a/command.c b/command.c
index b966a75..e66eb12 100644
--- a/command.c
+++ b/command.c
@@ -263,6 +263,17 @@ static bool cmd_ping(struct conn_data *data,const char *tag,const char **args){
 	return net_send_pong(data->fd,tag);
 }
 
+static bool cmd_is_online(struct conn_data *data,const char *tag,const char **args){
+	i64 userid=db_find_user(args[0]);
+	if(userid==-1){
+		net_send_error(data->fd,tag,"User not found");
+		return false;
+	}
+	i64 nfds;
+	(void)userdata_online(userid,&nfds);
+	return net_send_number(data->fd,tag,nfds);
+}
+
 
 struct cmd_info{
 	const char *cmdname;
@@ -281,6 +292,7 @@ static const struct cmd_info commands[]={
 	{"send",2,true,cmd_send},
 	{"history",2,false,cmd_history},
 	{"ping",0,false,cmd_ping},
+	{"is_online",1,false,cmd_is_online},
 };
 #define NCOMMANDS (sizeof(commands)/sizeof(commands[0]))
 
diff --git a/net.c b/net.c
index e5bdb6b..cce4dc6 100644
--- a/net.c
+++ b/net.c
@@ -27,6 +27,14 @@ bool net_send_ok(int fd,const char *tag){
 	return closed;
 }
 
+bool net_send_number(int fd,const char *tag,i64 number){
+	char *buf=NULL;
+	i64 len=asprintf(&buf,"%s number %" PRIi64 "\n",tag,number);
+	bool closed=net_send_raw_text(fd,buf,len);
+	free(buf);
+	return closed;
+}
+
 bool net_send_error(int fd,const char *tag,const char *msg){
 	char *buf=NULL;
 	i64 len=asprintf(&buf,"%s error %s\n",tag,msg);
diff --git a/net.h b/net.h
index 4528e42..11475b7 100644
--- a/net.h
+++ b/net.h
@@ -5,6 +5,7 @@
 
 bool net_send_raw_text(int fd,const char *text,i64 len);
 bool net_send_ok(int fd,const char *tag);
+bool net_send_number(int fd,const char *tag,i64 number);
 bool net_send_error(int fd,const char *tag,const char *msg);
 bool net_send_name(int fd,const char *tag,const char *name);
 bool net_send_list(int fd,const char *tag,i64 count,const char **list);