var util = require('util'); function BufferObject(data, getUpdate, maxAge) { if (typeof getUpdate != 'function') { throw new Error('BufferObject requires a update function'); } maxAge = maxAge || 6e4; //noinspection JSUnusedGlobalSymbols return { lastUpdate: data ? Date.now() : 0, data: data || null, set: function(data) { this.data = data; this.lastUpdate = Date.now(); }, get: function(callback) { if (this.data != null) { if (maxAge < 0 || this.lastUpdate >= Date.now() - maxAge) { if (typeof callback == 'function') callback(this.data); return; } } var that = this; getUpdate(function(err, data) { if (err) { that.get(); return; } that.set(data); if (typeof callback == 'function') callback(data); }); }, push: function(data) { // Be sure the data is loaded this.get(); if (util.isArray(this.data)) { this.data.push(data); } }, remove: function(data) { this.get(); for (var i in this.data) { if (!this.data.hasOwnProperty(i)) continue; if (this.data[i] == data) { this.data.splice(i, 1); return; } } }, removeAt: function(index) { // Be sure the data is loaded this.get(); if (util.isArray(this.data) && index < this.data.length) { this.data.splice(index, 1); } } }; } module.exports = BufferObject;