Announce participant joins and leaves

static/protocol.js

@@ -189,7 +189,7 @@ function ServerConnection() {
      * onuser is called whenever a user in the hall changes.  The users
      * array has already been updated.
      *
-     * @type{(this: ServerConnection, id: string, kind: string) => void}
+     * @type{(this: ServerConnection, id: string, kind: string, user: user|null) => void}
      */
     this.onuser = null;
     /**
@@ -450,6 +450,7 @@ ServerConnection.prototype.connect = function(url) {
                                  m.error || null, m.value || null);
             break;
         case 'user':
+            let user = null;
             switch(m.kind) {
             case 'add':
                 if(m.id in sc.users)
@@ -460,6 +461,7 @@ ServerConnection.prototype.connect = function(url) {
                     data: m.data || {},
                     streams: {},
                 };
+                user = sc.users[m.id];
                 break;
             case 'change':
                 if(!(m.id in sc.users)) {
@@ -475,10 +477,17 @@ ServerConnection.prototype.connect = function(url) {
                     sc.users[m.id].permissions = m.permissions || [];
                     sc.users[m.id].data = m.data || {};
                 }
+                user = sc.users[m.id];
                 break;
             case 'delete':
                 if(!(m.id in sc.users))
                     console.warn(`Unknown user ${m.id} ${m.username}`);
+                user = sc.users[m.id] || {
+                    username: m.username || '',
+                    permissions: [],
+                    data: {},
+                    streams: {},
+                };
                 for(let t in sc.transferredFiles) {
                     let f = sc.transferredFiles[t];
                     if(f.userid === m.id)
@@ -491,7 +500,7 @@ ServerConnection.prototype.connect = function(url) {
                 return;
             }
             if(sc.onuser)
-                sc.onuser.call(sc, m.id, m.kind);
+                sc.onuser.call(sc, m.id, m.kind, user);
             break;
         case 'chat':
         case 'chathistory':