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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
/**
* @fileoverview A class for keeping track of the details of a player.
*/
var PlayerInfo = (function() {
'use strict';
/**
* A class that keeps track of properties on a media player.
* @param id A unique id that can be used to identify this player.
*/
function PlayerInfo(id) {
this.id = id;
// The current value of the properties for this player.
this.properties = {};
// All of the past (and present) values of the properties.
this.pastValues = {};
// Every single event in the order in which they were received.
this.allEvents = [];
this.lastRendered = 0;
this.firstTimestamp_ = -1;
}
PlayerInfo.prototype = {
/**
* Adds or set a property on this player.
* This is the default logging method as it keeps track of old values.
* @param timestamp The time in milliseconds since the Epoch.
* @param key A String key that describes the property.
* @param value The value of the property.
*/
addProperty: function(timestamp, key, value) {
// The first timestamp that we get will be recorded.
// Then, all future timestamps are deltas of that.
if (this.firstTimestamp_ === -1) {
this.firstTimestamp_ = timestamp;
}
if (typeof key !== 'string') {
throw new Error(typeof key + ' is not a valid key type');
}
this.properties[key] = value;
if (!this.pastValues[key]) {
this.pastValues[key] = [];
}
var recordValue = {
time: timestamp - this.firstTimestamp_,
key: key,
value: value
};
this.pastValues[key].push(recordValue);
this.allEvents.push(recordValue);
},
/**
* Adds or set a property on this player.
* Does not keep track of old values. This is better for
* values that get spammed repeatedly.
* @param timestamp The time in milliseconds since the Epoch.
* @param key A String key that describes the property.
* @param value The value of the property.
*/
addPropertyNoRecord: function(timestamp, key, value) {
this.addProperty(timestamp, key, value);
this.allEvents.pop();
}
};
return PlayerInfo;
}());
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