Hifi scripting: JS entity wrapper + timeout example

example.js

var ENTITY_TIMEOUT = 30;    // tell entity server to delete us after 30 secs
var TIMEOUT_INTERVAL = 20;  // refresh every 20 secs

function createEntity (properties) {
    properties.lifetime = ENTITY_TIMEOUT;
    var entityId = Entity.addEntity(properties);
    var timeout = TIMEOUT_INTERVAL;
    
    return {
        id: entityId,
        edit: function (properties) { Entities.editEntity(entityId, properties); },
        delete: function () { Entities.deleteEntity(entityId); },
        getProperties: function () { Entities.getEntityProperties(entityId); },
        keepAlive: function (dt) {  // call this every update
            if ((timeout -= dt) < 0.0) {
                timeout = TIMEOUT_INTERVAL;
                Entities.editEntity(entityId, {
                    lifetime: Entities.getEntityProperties(entityId).age + ENTITY_TIMEOUT
                });
            }
        }
    };
}