add new livechan ui

contrib/js/old-livechan.js

@@ -0,0 +1,65 @@
+function livechan_got_post(widget, j) {
+  // do scroll
+  while (widget.children.length > 5) {
+    // remove top element
+    widget.removeChild(widget.children[0]);
+  }
+  nntpchan_buildpost(widget, j);
+  // scroll to bottom
+  widget.scrollTop = widget.scrollHeight;
+}
+
+// inject post form into an element
+function inject_postform(prefix, parent) {
+  
+}
+
+// inject livechan widget into parent
+function inject_livechan_widget(prefix, parent) {
+  if ( "WebSocket" in window ) {
+    var url = "ws://"+document.location.host+prefix+"live";
+    if ( document.location.protocol == "https:" ) {
+      url = "wss://"+document.location.host+prefix+"live";
+    }
+    var socket = new WebSocket(url);
+    var progress = function(str) {
+      parent.innerHTML = "<pre>livechan: "+str+"</pre>";
+    };
+    progress("initialize");
+    socket.onopen = function () {
+      progress("streaming");
+    }
+    socket.onmessage = function(ev) {
+      var j = null;
+      try {
+        j = JSON.parse(ev.data);
+      } catch(e) {
+        // ignore
+      }
+      if (j) {
+        livechan_got_post(parent, j);
+      }
+    }
+    socket.onclose = function(ev) {
+      progress("connection closed");
+      setTimeout(function() {
+        inject_livechan_widget(prefix, parent);
+      }, 1000);
+    }
+  } else {
+    parent.innerHTML = "<pre>livechan mode requires websocket support</pre>";
+    setTimeout(function() {
+      parent.innerHTML = "";
+    }, 5000);
+  }
+}
+
+function ukko_livechan(prefix) {
+  var ukko = document.getElementById("ukko_threads");
+  if (ukko) {
+    // remove children
+    ukko.innerHTML = "";
+    inject_livechan_widget(prefix, ukko);
+  }
+}
+