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// simple version, only toggle watch / unwatch
const simpleWatchable = (collection) => {
collection.attachSchema({
watchers: {
type: [String],
optional: true,
},
});
collection.helpers({
getWatchLevels() {
return [true, false];
},
watcherIndex(userId) {
return this.watchers.indexOf(userId);
},
findWatcher(userId) {
return _.contains(this.watchers, userId);
},
});
collection.mutations({
setWatcher(userId, level) {
// if level undefined or null or false, then remove
if (!level) return { $pull: { watchers: userId }};
return { $addToSet: { watchers: userId }};
},
});
};
// more complex version of same interface, with 3 watching levels
const complexWatchOptions = ['watching', 'tracking', 'muted'];
const complexWatchDefault = 'muted';
const complexWatchable = (collection) => {
collection.attachSchema({
'watchers.$.userId': {
type: String,
},
'watchers.$.level': {
type: String,
allowedValues: complexWatchOptions,
},
});
collection.helpers({
getWatchOptions() {
return complexWatchOptions;
},
getWatchDefault() {
return complexWatchDefault;
},
watcherIndex(userId) {
return _.pluck(this.watchers, 'userId').indexOf(userId);
},
findWatcher(userId) {
return _.findWhere(this.watchers, { userId });
},
getWatchLevel(userId) {
const watcher = this.findWatcher(userId);
return watcher ? watcher.level : complexWatchDefault;
},
});
collection.mutations({
setWatcher(userId, level) {
// if level undefined or null or false, then remove
if (level === complexWatchDefault) level = null;
if (!level) return { $pull: { watchers: { userId }}};
const index = this.watcherIndex(userId);
if (index<0) return { $push: { watchers: { userId, level }}};
return {
$set: {
[`watchers.${index}.level`]: level,
},
};
},
});
};
complexWatchable(Boards);
simpleWatchable(Lists);
simpleWatchable(Cards);
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