First per-pad state for global view

The global view settings are send to the server with a GLOBAL_VIEW message
in a COLLABROOM message. Only the changed values have to submitted to the
server. On every change the server broadcasts the new state to all clients.
The global view state is also contained in the clientVars to transmit the
initial values for new clients.

1 files changed, 53 insertions, 0 deletions

diff --git a/index.js b/index.js
new file mode 100644
index 0000000..6e7e0cd
--- /dev/null
+++ b/index.js
@@ -0,0 +1,53 @@
+var ERR = require("async-stacktrace");
+var padMessage = require("ep_etherpad-lite/node/handler/PadMessageHandler.js");
+var padManager = require("ep_etherpad-lite/node/db/PadManager.js");
+
+exports.clientVars = function(hook, context, callback)
+{
+  var globalViewInfo = {};
+
+  if (context.hasOwnProperty("pad")) {
+    var pad = context.pad;
+    if (pad.hasOwnProperty("globalViewInfo")) {
+      globalViewInfo = pad.globalViewInfo;
+    }
+  }  
+
+  return callback({ "globalViewInfo": globalViewInfo });
+};
+
+exports.handleMessage = function(hook_name, context, cb) {
+  if ( context.message.type == "COLLABROOM" && context.message.data.type == "GLOBAL_VIEW") {
+    var client = context.client;
+    var session = padMessage.sessioninfos[client.id];
+
+    padManager.getPad(session.padId, function(err, pad) {
+      if (ERR(err)) return cb();
+
+      var globalViewInfo = {};
+      if (pad.hasOwnProperty("globalViewInfo")) {
+          globalViewInfo = pad.globalViewInfo;
+      }
+
+      for (key in context.message.data.data) {
+        globalViewInfo[key] = context.message.data.data[key];
+      }
+      pad.globalViewInfo = globalViewInfo;
+      pad.saveToDatabase();
+
+      var message = {
+        "type": "COLLABROOM",
+        "data": {
+          type: "GLOABL_VIEW",
+          globalViewInfo: globalViewInfo
+        }
+      };
+
+      client.broadcast.to(session.padId).json.send(message);
+      return cb([null]);
+    });
+  }
+  else {
+    return cb();
+  }
+};