diff -r e0b3ef3c07d0 -r 641ced48fd5a web/client.php
--- a/web/client.php	Thu Jan 10 18:53:10 2019 +0100
+++ b/web/client.php	Fri Jan 11 01:19:45 2019 +0100
@@ -96,6 +96,7 @@
     <script type="text/javascript" src="<?php echo(registry_url('underscore','js'))?>"></script>
     <script type="text/javascript" src="<?php echo(registry_url('raphael','js'))?>"></script>
     <script type="text/javascript" src="<?php echo(registry_url('fancybox','js'))?>"></script>
+    <script type="text/javascript" src="<?php echo(registry_url('twitter-text','js'))?>"></script>
     <?php if( isset($config['additional_js']) && !empty($config['additional_js'])) { 
         foreach ($config['additional_js'] as $jsUrl) {?>
     <script type="text/javascript" src="<?php echo($jsUrl)?>"></script>
@@ -181,16 +182,17 @@
             const TWEET_LENGTH = <?php echo(TWEET_LENGTH)?>;
             function updateCounter() {
                 var _v = $("#status").val();
-                if (_v.length > TWEET_LENGTH) {
-                    _v = _v.substr(0,TWEET_LENGTH);
-                    $("#status").val(_v);
-                }
-                $('#tweetCounter').html(TWEET_LENGTH-_v.length);
-                if(TWEET_LENGTH-_v.length < 0) {
+                var _tRes = twttr.txt.parseTweet(_v);
+                if(_tRes.valid) {
+                    $('#tweetCounter').removeClass("tweetCounterNegative");
+                    $('#sendTweet').prop("disabled",false);
+                    $('#sendTweet').removeClass("sendTweetDisabled");
+                    $('#tweetCounter').html("");
+                } else {
                     $('#tweetCounter').addClass("tweetCounterNegative");
-                }
-                else {
-                    $('#tweetCounter').removeClass("tweetCounterNegative");
+                    $('#sendTweet').prop("disabled",true);
+                    $('#sendTweet').addClass("sendTweetDisabled");
+                    $('#tweetCounter').html(_tRes.validRangeEnd - _tRes.displayRangeEnd);
                 }
                 $(".tweetButton").each(function(_i, _e) {
                     if (_v.search($(_e).find('span.twbSyntax').text().replace(/(\W)/g, '\\$1')) > -1) {
@@ -200,6 +202,7 @@
                     }
                 });
             }
+            updateCounter();
 
             // BUTTONS
             $(".tweetButton").click(function() {
@@ -208,7 +211,10 @@
             })
 
             // SEND TWEETS
-            $("#sendTweet").click(function(){
+            $("#sendTweet").click(function(e){
+                if($('#sendTweet').prop('disabled')) {
+                    return;
+                }
                 var MyStatus = $('#status').val();
                 $.post('tweet_ajax.php', {status:MyStatus}
                 ,function(data) {