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@ -18,6 +18,25 @@ define(['json.sortify'], function (Sortify) {
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var lazyChangeHandlers = [];
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var titleChangeHandlers = [];
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// When someone leaves the document, their metadata is removed from our metadataObj
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// but it is not removed instantly from the chainpad document metadata. This is
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// the result of the lazy object: if we had to remove the metadata instantly, all
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// the remaining members would try to push a patch to do it, and it could create
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// conflicts. Their metadata is instead removed from the chainpad doc only when
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// someone calls onLocal to make another change.
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// The leaving user is not visible in the userlist UI because we filter it using
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// the list of "members" (netflux ID currently online).
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// Our Problem:
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// With the addition of shared workers, a user can leave and join back with the same
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// netflux ID (just reload the pad). If nobody has made any change in the mean time,
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// their metadata will still be in the document, but they won't be in our metadataObj.
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// This causes the presence of a "viewer" instead of an editor, because they don't
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// have user data.
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// To fix this problem, the metadata manager can request "syncs" from a chainpad app,
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// and the app should trigger a "metadataMgr.updateMetadata(data)" in the handler.
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// See "metadataMgr.onRequestSync" in sframe-app-framework for an example.
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var syncHandlers = [];
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var rememberedTitle;
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var checkUpdate = function (lazy) {
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@ -41,26 +60,25 @@ define(['json.sortify'], function (Sortify) {
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var mdo = {};
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// We don't want to add our user data to the object multiple times.
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//var containsYou = false;
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//console.log(metadataObj);
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Object.keys(metadataObj.users).forEach(function (x) {
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if (members.indexOf(x) === -1) { return; }
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mdo[x] = metadataObj.users[x];
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/*if (metadataObj.users[x].uid === meta.user.uid) {
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//console.log('document already contains you');
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containsYou = true;
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}*/
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});
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//if (!containsYou) { mdo[meta.user.netfluxId] = meta.user; }
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if (!priv.readOnly) {
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mdo[meta.user.netfluxId] = meta.user;
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}
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metadataObj.users = mdo;
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// Always update the userlist in the lazy object, otherwise it may be outdated
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// and metadataMgr.updateMetadata() won't do anything, and so we won't push events
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// to the userlist UI ==> phantom viewers
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var lazyUserStr = Sortify(metadataLazyObj.users[meta.user.netfluxId]);
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dirty = false;
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if (lazy || lazyUserStr !== Sortify(meta.user)) {
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metadataLazyObj = JSON.parse(JSON.stringify(metadataObj));
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lazyChangeHandlers.forEach(function (f) { f(); });
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} else {
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metadataLazyObj.users = JSON.parse(JSON.stringify(mdo));
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}
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if (metadataObj.title !== rememberedTitle) {
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@ -127,13 +145,14 @@ define(['json.sortify'], function (Sortify) {
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members.push(ev);
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if (!meta.user) { return; }
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change(false);
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syncHandlers.forEach(function (f) { f(); });
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});
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sframeChan.on('EV_RT_LEAVE', function (ev) {
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var idx = members.indexOf(ev);
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if (idx === -1) { console.log('Error: ' + ev + ' not in members'); return; }
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members.splice(idx, 1);
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if (!meta.user) { return; }
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change(true);
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change(false);
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});
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sframeChan.on('EV_RT_DISCONNECT', function () {
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members = [];
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@ -171,13 +190,14 @@ define(['json.sortify'], function (Sortify) {
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onTitleChange: function (f) { titleChangeHandlers.push(f); },
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onChange: function (f) { changeHandlers.push(f); },
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onChangeLazy: function (f) { lazyChangeHandlers.push(f); },
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onRequestSync: function (f) { syncHandlers.push(f); },
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isConnected : function () {
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return members.indexOf(meta.user.netfluxId) !== -1;
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},
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getViewers : function () {
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checkUpdate(false);
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var list = members.slice().filter(function (m) { return m.length === 32; });
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return list.length - Object.keys(metadataObj.users).length;
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return list.length - Object.keys(metadataLazyObj.users).length;
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},
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getChannelMembers: function () { return members.slice(); },
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getPrivateData : function () {
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