implemented event log page for the device dashboard

examples/device-dashboard/main.c

@@ -4,6 +4,18 @@
 #include "mongoose.h"
 #include "net.h"
 
+void ui_event_next() {
+  if (events_no < 0 || events_no >= MAX_EVENTS_NO)
+    return;
+
+  events[events_no].type = rand() % 3;
+  events[events_no].prio = rand() % 3;
+  events[events_no].timestamp = events_no;
+  mg_snprintf(events[events_no].text, MAX_EVENT_TEXT_SIZE,
+              "event#%d", events_no);
+  events_no++;
+}
+
 static int s_sig_num;
 static void signal_handler(int sig_num) {
   signal(sig_num, signal_handler);
@@ -12,17 +24,25 @@ static void signal_handler(int sig_num) {
 
 int main(void) {
   struct mg_mgr mgr;
+  uint64_t last_ts = mg_millis();
+  uint64_t crt_ts;
 
   signal(SIGPIPE, SIG_IGN);
   signal(SIGINT, signal_handler);
   signal(SIGTERM, signal_handler);
 
+  srand(time(NULL));
   mg_log_set(MG_LL_DEBUG);  // Set debug log level
   mg_mgr_init(&mgr);
 
   web_init(&mgr);
   while (s_sig_num == 0) {
     mg_mgr_poll(&mgr, 50);
+    crt_ts = mg_millis();
+    if (crt_ts - last_ts > 1000) {
+      last_ts = crt_ts;
+      ui_event_next(); // generate a new event
+    }
   }
 
   mg_mgr_free(&mgr);