180 lines
6.9 KiB
JavaScript
180 lines
6.9 KiB
JavaScript
define(['json.sortify'], function (Sortify) {
|
||
var UNINIT = 'uninitialized';
|
||
var create = function (sframeChan) {
|
||
var meta = UNINIT;
|
||
var members = [];
|
||
var metadataObj = UNINIT;
|
||
// This object reflects the metadata which is in the document at this moment.
|
||
// Normally when a person leaves the pad, everybody sees them leave and updates
|
||
// their metadata, this causes everyone to fight to change the document and
|
||
// operational transform doesn't like it. So this is a lazy object which is
|
||
// only updated either:
|
||
// 1. On changes to the metadata that come in from someone else
|
||
// 2. On changes connects, disconnects or changes to your own metadata
|
||
var metadataLazyObj = UNINIT;
|
||
var priv = {};
|
||
var dirty = true;
|
||
var changeHandlers = [];
|
||
var lazyChangeHandlers = [];
|
||
var titleChangeHandlers = [];
|
||
|
||
var rememberedTitle;
|
||
|
||
var checkUpdate = function (lazy) {
|
||
if (!dirty) { return; }
|
||
if (meta === UNINIT) { throw new Error(); }
|
||
if (metadataObj === UNINIT) {
|
||
metadataObj = {
|
||
defaultTitle: meta.doc.defaultTitle,
|
||
//title: meta.doc.defaultTitle,
|
||
type: meta.doc.type,
|
||
users: {}
|
||
};
|
||
metadataLazyObj = JSON.parse(JSON.stringify(metadataObj));
|
||
}
|
||
if (!metadataObj.users) { metadataObj.users = {}; }
|
||
if (!metadataLazyObj.users) { metadataLazyObj.users = {}; }
|
||
|
||
if (!metadataObj.type) { metadataObj.type = meta.doc.type; }
|
||
if (!metadataLazyObj.type) { metadataLazyObj.type = meta.doc.type; }
|
||
|
||
var mdo = {};
|
||
// We don't want to add our user data to the object multiple times.
|
||
//var containsYou = false;
|
||
//console.log(metadataObj);
|
||
Object.keys(metadataObj.users).forEach(function (x) {
|
||
if (members.indexOf(x) === -1) { return; }
|
||
mdo[x] = metadataObj.users[x];
|
||
/*if (metadataObj.users[x].uid === meta.user.uid) {
|
||
//console.log('document already contains you');
|
||
containsYou = true;
|
||
}*/
|
||
});
|
||
//if (!containsYou) { mdo[meta.user.netfluxId] = meta.user; }
|
||
if (!priv.readOnly) {
|
||
mdo[meta.user.netfluxId] = meta.user;
|
||
}
|
||
metadataObj.users = mdo;
|
||
var lazyUserStr = Sortify(metadataLazyObj.users[meta.user.netfluxId]);
|
||
dirty = false;
|
||
if (lazy || lazyUserStr !== Sortify(meta.user)) {
|
||
metadataLazyObj = JSON.parse(JSON.stringify(metadataObj));
|
||
lazyChangeHandlers.forEach(function (f) { f(); });
|
||
}
|
||
|
||
if (metadataObj.title !== rememberedTitle) {
|
||
rememberedTitle = metadataObj.title;
|
||
titleChangeHandlers.forEach(function (f) {
|
||
f(metadataObj.title, metadataObj.defaultTitle);
|
||
});
|
||
}
|
||
|
||
changeHandlers.forEach(function (f) { f(); });
|
||
};
|
||
var change = function (lazy) {
|
||
dirty = true;
|
||
setTimeout(function () {
|
||
checkUpdate(lazy);
|
||
});
|
||
};
|
||
|
||
var netfluxId;
|
||
var isReady = false;
|
||
var readyHandlers = [];
|
||
sframeChan.on('EV_METADATA_UPDATE', function (ev) {
|
||
meta = ev;
|
||
if (ev.priv) {
|
||
priv = ev.priv;
|
||
}
|
||
if (netfluxId) {
|
||
meta.user.netfluxId = netfluxId;
|
||
}
|
||
if (!isReady) {
|
||
isReady = true;
|
||
readyHandlers.forEach(function (f) { f(); });
|
||
}
|
||
change(true);
|
||
});
|
||
sframeChan.on('EV_RT_CONNECT', function (ev) {
|
||
netfluxId = ev.myID;
|
||
members = ev.members;
|
||
if (!meta.user) { return; }
|
||
meta.user.netfluxId = netfluxId;
|
||
change(true);
|
||
});
|
||
sframeChan.on('EV_RT_JOIN', function (ev) {
|
||
var idx = members.indexOf(ev);
|
||
if (idx !== -1) { console.log('Error: ' + ev + ' is already in members'); return; }
|
||
members.push(ev);
|
||
if (!meta.user) { return; }
|
||
change(false);
|
||
});
|
||
sframeChan.on('EV_RT_LEAVE', function (ev) {
|
||
var idx = members.indexOf(ev);
|
||
if (idx === -1) { console.log('Error: ' + ev + ' not in members'); return; }
|
||
members.splice(idx, 1);
|
||
if (!meta.user) { return; }
|
||
change(false);
|
||
});
|
||
sframeChan.on('EV_RT_DISCONNECT', function () {
|
||
members = [];
|
||
if (!meta.user) { return; }
|
||
change(true);
|
||
});
|
||
sframeChan.on('EV_RT_ERROR', function (err) {
|
||
if (err.type !== 'EEXPIRED' && err.type !== 'EDELETED') { return; }
|
||
members = [];
|
||
if (!meta.user) { return; }
|
||
change(true);
|
||
});
|
||
|
||
return Object.freeze({
|
||
updateMetadata: function (m) {
|
||
// JSON.parse(JSON.stringify()) reorders the json, so we have to use sortify even
|
||
// if it's on our own computer
|
||
if (!m) { return; }
|
||
if (Sortify(metadataLazyObj) === Sortify(m)) { return; }
|
||
metadataObj = JSON.parse(JSON.stringify(m));
|
||
metadataLazyObj = JSON.parse(JSON.stringify(m));
|
||
change(false);
|
||
},
|
||
updateTitle: function (t) {
|
||
metadataObj.title = t;
|
||
change(true);
|
||
},
|
||
getMetadata: function () {
|
||
checkUpdate(false);
|
||
return Object.freeze(JSON.parse(JSON.stringify(metadataObj)));
|
||
},
|
||
getMetadataLazy: function () {
|
||
return metadataLazyObj;
|
||
},
|
||
onTitleChange: function (f) { titleChangeHandlers.push(f); },
|
||
onChange: function (f) { changeHandlers.push(f); },
|
||
onChangeLazy: function (f) { lazyChangeHandlers.push(f); },
|
||
isConnected : function () {
|
||
return members.indexOf(meta.user.netfluxId) !== -1;
|
||
},
|
||
getViewers : function () {
|
||
checkUpdate(false);
|
||
var list = members.slice().filter(function (m) { return m.length === 32; });
|
||
return list.length - Object.keys(metadataObj.users).length;
|
||
},
|
||
getPrivateData : function () {
|
||
return priv;
|
||
},
|
||
getUserData : function () {
|
||
return meta.user;
|
||
},
|
||
getNetfluxId : function () {
|
||
return meta.user.netfluxId;
|
||
},
|
||
onReady: function (f) {
|
||
if (isReady) { return void f(); }
|
||
readyHandlers.push(f);
|
||
}
|
||
});
|
||
};
|
||
return Object.freeze({ create: create });
|
||
});
|