var since = {}; // server -> time: For fetch?since=
var seen = {}; // seen_key -> message
// Messages have these fields:
- // Time: The server timestamp of the first copy to arrive
+ // Time: The timestamp. Median of ServerTimes
// ID: Some unique string for deduping
// Text: The text of the message
// ServerTimes: server -> timestamp
return id.replace(/@/g, "@@") + "_@_" + text.replace(/@/g, "@@");
}
+ function rcupdatemessagetime(message) {
+ // Set message.Time to be the median of message.ServerTimes
+ var times = [];
+ for (var i in message.ServerTimes) {
+ times.push(message.ServerTimes[i]);
+ }
+ times.sort();
+ var middle = times.length/2;
+ if (times.length % 2) {
+ message.Time = times[middle];
+ } else {
+ var difference = times[middle].getTime() - times[middle-1].getTime();
+ message.Time = new Date(times[middle-1].getTime() + difference/2);
+ }
+ }
+
function rcreceivemessages(server, messages) {
for (var i in messages) {
var m = messages[i];
var seen_key = make_seen_key(m.ID, m.Text);
if (seen_key in seen) {
seen[seen_key].ServerTimes[server] = m.Time;
+ rcupdatemessagetime(seen[seen_key]);
} else {
m.ServerTimes = {server: m.Time};
seen[seen_key] = m;