activate(params : { date: string, title: string }, routeConfig) : void {
this.post = this.app.posts.find(p => p.date === params.date && (p.title == params.title || p._title == params.title));
routeConfig.navModel.setTitle(this.post.title);
this.subscription = this.bindingEngine
.propertyObserver(this.post, 'body')
.subscribe(this.updateBody);
if(this.post.body){
this.updateBody(this.post.body);
}
}
this.title = routeConfig.title.replace(/\{([^\}]+)\}/g, (match, path: string) => {
let steps = path.split(".");
let field = steps.pop();
for (let step of steps) {
entity = entity[step];
}
this.bindingEngine.propertyObserver(entity, field).subscribe(value => {
this.title = routeConfig.title.replace(`{${path}}`, value);
routeConfig.navModel.setTitle(this.title);
});
return entity[field];
});
observe(properties, callback) {
var subscriptions = [], i = properties.length, object, propertyName;
while(i--) {
object = properties[i][0];
propertyName = properties[i][1];
subscriptions.push(this.bindingEngine.propertyObserver(object, propertyName).subscribe(callback));
}
// return dispose function
return {
dispose: () => {
while(subscriptions.length) {
subscriptions.pop().dispose();
}
}
}
}