spiderable_client.js

// We want to provide a deteriministic indicator of when the page is 'done'
// This is non-trivial: e.g. an infinite stream of tweets is never done.
//
// We do this instead:
//   We are done sometime after all initial subscriptions are ready
//   Initial subscriptions are those started in the top-level script execution,
//   or from a Meteor.startup callback when Meteor.startup is called in
//   top-level script execution.
//
// Note that we don't guarantee that we won't wait longer than we have to;
// extra subscriptions may be made, and extra data past the minimum may be
// received.
//
// We set this 'started' flag as Package.spiderable.Spiderable._initialSubscriptionsStarted
// This is used by our phantomjs to determine when the subscriptions are started;
// it then polls until all subscriptions are ready.

Spiderable2._initialSubscriptionsStarted = false;

var startupCallbacksDone = function() {
  Spiderable2._initialSubscriptionsStarted = true;
};

// This extra indirection is how we get called last
var topLevelCodeDone = function() {
  // We'd like to use Meteor.startup here I think, but docs/behaviour of that is wrong
  Meteor._setImmediate(function () { startupCallbacksDone(); });
};

Spiderable2.pageReadyEvaluation = function() {
	if ( typeof Meteor === 'undefined'
			|| Meteor.status === undefined
			|| !Meteor.status().connected ) {
		return false;
	}
    if ( typeof Package === 'undefined'
        	|| Package['lufrai:spiderable2'] === undefined
        	|| Package['lufrai:spiderable2'].Spiderable2 === undefined
        	|| !Package['lufrai:spiderable2'].Spiderable2._initialSubscriptionsStarted ) {
      	return false;
    }
    Tracker.flush();
    return DDP._allSubscriptionsReady();
};

Meteor.startup(function () { topLevelCodeDone(); });