From b40edea3eed5b03e8b5ff87edcd1faebe24888cc Mon Sep 17 00:00:00 2001
From: Christian Heller <c.heller@plomlompom.de>
Date: Thu, 29 Oct 2020 02:34:25 +0100
Subject: [PATCH] Guide user interaction based on server availability.

---
 new2/rogue_chat_nocanvas_monochrome.html | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/new2/rogue_chat_nocanvas_monochrome.html b/new2/rogue_chat_nocanvas_monochrome.html
index f878776..d7e0018 100644
--- a/new2/rogue_chat_nocanvas_monochrome.html
+++ b/new2/rogue_chat_nocanvas_monochrome.html
@@ -124,11 +124,16 @@ let server = {
         this.websocket = new WebSocket(url);
         this.websocket.onopen = function(event) {
             window.setInterval(function() { server.send(['PING']) }, 30000);
-            server.send(['GET_GAMESTATE']);
+            tui.log_msg("@ server connected!");
+            tui.init_login();
         };
     },
     send: function(tokens) {
-        this.websocket.send(unparser.untokenize(tokens));
+        if (this.websocket.readyState !== WebSocket.OPEN) {
+            tui.log_msg('server disconnected :(');
+        } else {
+            this.websocket.send(unparser.untokenize(tokens));
+        }
     }
 }
 
@@ -164,6 +169,7 @@ class Mode {
         this.shows_annotations = shows_annotations;
     }
 }
+let mode_waiting_for_server = new Mode('waiting_for_server', false, false);
 let mode_login = new Mode('login', true, false);
 let mode_chat = new Mode('chat', true, false);
 let mode_annotate = new Mode('annotate', true, true);
@@ -172,7 +178,7 @@ let mode_study = new Mode('study', false, true);
 let mode_edit = new Mode('edit', false, false);
 
 let tui = {
-  mode: mode_login,
+  mode: mode_waiting_for_server,
   log: [],
   input_prompt: '> ',
   input: '',
@@ -184,7 +190,11 @@ let tui = {
   init: function() {
       this.recalc_input_lines();
       this.height_header = this.height_turn_line + this.height_mode_line;
-      this.log_msg("Please enter your username:");
+      this.log_msg("@ waiting for server connection ...");
+  },
+  init_login: function() {
+      this.log_msg("@ please enter your username:");
+      this.switch_mode(mode_login);
   },
   switch_mode: function(mode, keep_pos=false) {
     if (mode == mode_study && !keep_pos) {
@@ -404,8 +414,9 @@ server.websocket.onmessage = function (event) {
      tui.log_msg('@ ' + tokens[1]);
      tui.refresh();
   } else if (tokens[0] === 'LOGIN_OK') {
-      tui.log_msg('@ ' + tokens[1]);
+      server.send(['GET_GAMESTATE']);
       tui.log_help();
+      tui.log_msg('@ ' + tokens[1]);
       tui.switch_mode(mode_chat);
   } else if (tokens[0] === 'ANNOTATION') {
      let position = parser.parse_yx(tokens[1]);
-- 
2.30.2