mirror of
https://github.com/vale981/Vulcan
synced 2025-03-10 04:26:41 -04:00
109 lines
3.3 KiB
JavaScript
109 lines
3.3 KiB
JavaScript
// see https://www.discovermeteor.com/blog/template-level-subscriptions/
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// this template acts as the controller that sets and
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// manages the reactive context for the embedded postsList template
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Template.singleDay.created = function () {
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// 1. Initialization
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var instance = this;
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// initialize the reactive variables
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instance.postsLoaded = new ReactiveVar(0);
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instance.postsLimit = new ReactiveVar(Settings.get('postsPerPage', 10));
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instance.getTerms = function () {
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// if instance has a set date use this, else depend on Session variable
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var currentDate = (!!instance.data && !!instance.data.date) ? instance.data.date: Session.get('currentDate');
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return {
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view: 'singleday',
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after: moment(currentDate).startOf('day').toDate(),
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before: moment(currentDate).endOf('day').toDate()
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};
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};
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// 2. Autorun
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// this autorun is there just to reset the post limit
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// when current date changes (i.e. we're switching page)
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instance.autorun(function () {
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// just by including this session variable in the autorun, we automatically make it depend on it
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var currentDate = Session.get('currentDate');
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instance.postsLimit.set(Settings.get('postsPerPage', 10));
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});
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// will re-run when postsLimit or currentDate change
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instance.autorun(function () {
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var terms = instance.getTerms();
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// get the postsLimit
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terms.limit = instance.postsLimit.get();
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// console.log("Asking for " + terms.limit + " posts…")
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// subscribe
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var postsSubscription = instance.subscribe('postsList', terms);
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var usersSubscription = instance.subscribe('postsListUsers', terms);
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// if subscriptions are ready, set limit to newLimit
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if (instance.subscriptionsReady()) {
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// console.log("> Received "+terms.limit+" posts. \n\n")
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instance.postsLoaded.set(terms.limit);
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} else {
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// console.log("> Subscription is not ready yet. \n\n");
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}
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});
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// 3. Cursor
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instance.getPostsCursor = function() {
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// console.log('loaded ' + instance.postsLoaded.get() + ' posts')
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var termsLoaded = _.extend(instance.getTerms(), {limit: instance.postsLoaded.get()});
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var parameters = Posts.getSubParams(termsLoaded);
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return Posts.find(parameters.find, parameters.options);
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};
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};
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Template.singleDay.helpers({
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showDateNav: function () {
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return (typeof this.showDateNav === 'undefined') ? true : this.showDateNav;
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},
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context: function () {
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// create context for postsList module
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var instance = Template.instance();
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var postsCursor = instance.getPostsCursor();
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var context = {
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// posts cursor
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postsCursor: postsCursor,
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// posts subscription readiness, used to show spinner
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postsReady: instance.subscriptionsReady(),
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// whether to show the load more button or not
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hasMorePosts: postsCursor.count() >= instance.postsLimit.get(),
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// what to do when user clicks "load more"
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loadMoreHandler: function (instance) {
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event.preventDefault();
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// get current value for limit, i.e. how many posts are currently displayed
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var limit = instance.postsLimit.get();
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// increase limit by 5 and update it
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limit += Settings.get('postsPerPage', 10);
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instance.postsLimit.set(limit);
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},
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// the current instance
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controllerInstance: instance
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};
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return context;
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}
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});
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