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/*
Speed Plug-in
Features:
*Adds several properties to the 'file' object indicated upload speed, time left, upload time, etc.
- currentSpeed -- String indicating the upload speed, bytes per second
- averageSpeed -- Overall average upload speed, bytes per second
- movingAverageSpeed -- Speed over averaged over the last several measurements, bytes per second
- timeRemaining -- Estimated remaining upload time in seconds
- timeElapsed -- Number of seconds passed for this upload
- percentUploaded -- Percentage of the file uploaded (0 to 100)
- sizeUploaded -- Formatted size uploaded so far, bytes
*Adds setting 'moving_average_history_size' for defining the window size used to calculate the moving average speed.
*Adds several Formatting functions for formatting that values provided on the file object.
- SWFUpload.speed.formatBPS(bps) -- outputs string formatted in the best units (Gbps, Mbps, Kbps, bps)
- SWFUpload.speed.formatTime(seconds) -- outputs string formatted in the best units (x Hr y M z S)
- SWFUpload.speed.formatSize(bytes) -- outputs string formatted in the best units (w GB x MB y KB z B )
- SWFUpload.speed.formatPercent(percent) -- outputs string formatted with a percent sign (x.xx %)
- SWFUpload.speed.formatUnits(baseNumber, divisionArray, unitLabelArray, fractionalBoolean)
- Formats a number using the division array to determine how to apply the labels in the Label Array
- factionalBoolean indicates whether the number should be returned as a single fractional number with a unit (speed)
or as several numbers labeled with units (time)
*/
var SWFUpload;
if (typeof(SWFUpload) === "function") {
SWFUpload.speed = {};
SWFUpload.prototype.initSettings = (function (oldInitSettings) {
return function () {
if (typeof(oldInitSettings) === "function") {
oldInitSettings.call(this);
}
this.ensureDefault = function (settingName, defaultValue) {
this.settings[settingName] = (this.settings[settingName] == undefined) ? defaultValue : this.settings[settingName];
};
// List used to keep the speed stats for the files we are tracking
this.fileSpeedStats = {};
this.speedSettings = {};
this.ensureDefault("moving_average_history_size", "10");
this.speedSettings.user_file_queued_handler = this.settings.file_queued_handler;
this.speedSettings.user_file_queue_error_handler = this.settings.file_queue_error_handler;
this.speedSettings.user_upload_start_handler = this.settings.upload_start_handler;
this.speedSettings.user_upload_error_handler = this.settings.upload_error_handler;
this.speedSettings.user_upload_progress_handler = this.settings.upload_progress_handler;
this.speedSettings.user_upload_success_handler = this.settings.upload_success_handler;
this.speedSettings.user_upload_complete_handler = this.settings.upload_complete_handler;
this.settings.file_queued_handler = SWFUpload.speed.fileQueuedHandler;
this.settings.file_queue_error_handler = SWFUpload.speed.fileQueueErrorHandler;
this.settings.upload_start_handler = SWFUpload.speed.uploadStartHandler;
this.settings.upload_error_handler = SWFUpload.speed.uploadErrorHandler;
this.settings.upload_progress_handler = SWFUpload.speed.uploadProgressHandler;
this.settings.upload_success_handler = SWFUpload.speed.uploadSuccessHandler;
this.settings.upload_complete_handler = SWFUpload.speed.uploadCompleteHandler;
delete this.ensureDefault;
};
})(SWFUpload.prototype.initSettings);
SWFUpload.speed.fileQueuedHandler = function (file) {
if (typeof this.speedSettings.user_file_queued_handler === "function") {
file = SWFUpload.speed.extendFile(file);
return this.speedSettings.user_file_queued_handler.call(this, file);
}
};
SWFUpload.speed.fileQueueErrorHandler = function (file, errorCode, message) {
if (typeof this.speedSettings.user_file_queue_error_handler === "function") {
file = SWFUpload.speed.extendFile(file);
return this.speedSettings.user_file_queue_error_handler.call(this, file, errorCode, message);
}
};
SWFUpload.speed.uploadStartHandler = function (file) {
if (typeof this.speedSettings.user_upload_start_handler === "function") {
file = SWFUpload.speed.extendFile(file, this.fileSpeedStats);
return this.speedSettings.user_upload_start_handler.call(this, file);
}
};
SWFUpload.speed.uploadErrorHandler = function (file, errorCode, message) {
file = SWFUpload.speed.extendFile(file, this.fileSpeedStats);
SWFUpload.speed.removeTracking(file, this.fileSpeedStats);
if (typeof this.speedSettings.user_upload_error_handler === "function") {
return this.speedSettings.user_upload_error_handler.call(this, file, errorCode, message);
}
};
SWFUpload.speed.uploadProgressHandler = function (file, bytesComplete, bytesTotal) {
this.updateTracking(file, bytesComplete);
file = SWFUpload.speed.extendFile(file, this.fileSpeedStats);
if (typeof this.speedSettings.user_upload_progress_handler === "function") {
return this.speedSettings.user_upload_progress_handler.call(this, file, bytesComplete, bytesTotal);
}
};
SWFUpload.speed.uploadSuccessHandler = function (file, serverData) {
if (typeof this.speedSettings.user_upload_success_handler === "function") {
file = SWFUpload.speed.extendFile(file, this.fileSpeedStats);
return this.speedSettings.user_upload_success_handler.call(this, file, serverData);
}
};
SWFUpload.speed.uploadCompleteHandler = function (file) {
file = SWFUpload.speed.extendFile(file, this.fileSpeedStats);
SWFUpload.speed.removeTracking(file, this.fileSpeedStats);
if (typeof this.speedSettings.user_upload_complete_handler === "function") {
return this.speedSettings.user_upload_complete_handler.call(this, file);
}
};
// Private: extends the file object with the speed plugin values
SWFUpload.speed.extendFile = function (file, trackingList) {
var tracking;
if (trackingList) {
tracking = trackingList[file.id];
}
if (tracking) {
file.currentSpeed = tracking.currentSpeed;
file.averageSpeed = tracking.averageSpeed;
file.movingAverageSpeed = tracking.movingAverageSpeed;
file.timeRemaining = tracking.timeRemaining;
file.timeElapsed = tracking.timeElapsed;
file.percentUploaded = tracking.percentUploaded;
file.sizeUploaded = tracking.bytesUploaded;
} else {
file.currentSpeed = 0;
file.averageSpeed = 0;
file.movingAverageSpeed = 0;
file.timeRemaining = 0;
file.timeElapsed = 0;
file.percentUploaded = 0;
file.sizeUploaded = 0;
}
return file;
};
// Private: Updates the speed tracking object, or creates it if necessary
SWFUpload.prototype.updateTracking = function (file, bytesUploaded) {
var tracking = this.fileSpeedStats[file.id];
if (!tracking) {
this.fileSpeedStats[file.id] = tracking = {};
}
// Sanity check inputs
bytesUploaded = bytesUploaded || tracking.bytesUploaded || 0;
if (bytesUploaded < 0) {
bytesUploaded = 0;
}
if (bytesUploaded > file.size) {
bytesUploaded = file.size;
}
var tickTime = (new Date()).getTime();
if (!tracking.startTime) {
tracking.startTime = (new Date()).getTime();
tracking.lastTime = tracking.startTime;
tracking.currentSpeed = 0;
tracking.averageSpeed = 0;
tracking.movingAverageSpeed = 0;
tracking.movingAverageHistory = [];
tracking.timeRemaining = 0;
tracking.timeElapsed = 0;
tracking.percentUploaded = bytesUploaded / file.size;
tracking.bytesUploaded = bytesUploaded;
} else if (tracking.startTime > tickTime) {
this.debug("When backwards in time");
} else {
// Get time and deltas
var now = (new Date()).getTime();
var lastTime = tracking.lastTime;
var deltaTime = now - lastTime;
var deltaBytes = bytesUploaded - tracking.bytesUploaded;
if (deltaBytes === 0 || deltaTime === 0) {
return tracking;
}
// Update tracking object
tracking.lastTime = now;
tracking.bytesUploaded = bytesUploaded;
// Calculate speeds
tracking.currentSpeed = (deltaBytes * 8 ) / (deltaTime / 1000);
tracking.averageSpeed = (tracking.bytesUploaded * 8) / ((now - tracking.startTime) / 1000);
// Calculate moving average
tracking.movingAverageHistory.push(tracking.currentSpeed);
if (tracking.movingAverageHistory.length > this.settings.moving_average_history_size) {
tracking.movingAverageHistory.shift();
}
tracking.movingAverageSpeed = SWFUpload.speed.calculateMovingAverage(tracking.movingAverageHistory);
// Update times
tracking.timeRemaining = (file.size - tracking.bytesUploaded) * 8 / tracking.movingAverageSpeed;
tracking.timeElapsed = (now - tracking.startTime) / 1000;
// Update percent
tracking.percentUploaded = (tracking.bytesUploaded / file.size * 100);
}
return tracking;
};
SWFUpload.speed.removeTracking = function (file, trackingList) {
try {
trackingList[file.id] = null;
delete trackingList[file.id];
} catch (ex) {
}
};
SWFUpload.speed.formatUnits = function (baseNumber, unitDivisors, unitLabels, singleFractional) {
var i, unit, unitDivisor, unitLabel;
if (baseNumber === 0) {
return "0 " + unitLabels[unitLabels.length - 1];
}
if (singleFractional) {
unit = baseNumber;
unitLabel = unitLabels.length >= unitDivisors.length ? unitLabels[unitDivisors.length - 1] : "";
for (i = 0; i < unitDivisors.length; i++) {
if (baseNumber >= unitDivisors[i]) {
unit = (baseNumber / unitDivisors[i]).toFixed(2);
unitLabel = unitLabels.length >= i ? " " + unitLabels[i] : "";
break;
}
}
return unit + unitLabel;
} else {
var formattedStrings = [];
var remainder = baseNumber;
for (i = 0; i < unitDivisors.length; i++) {
unitDivisor = unitDivisors[i];
unitLabel = unitLabels.length > i ? " " + unitLabels[i] : "";
unit = remainder / unitDivisor;
if (i < unitDivisors.length -1) {
unit = Math.floor(unit);
} else {
unit = unit.toFixed(2);
}
if (unit > 0) {
remainder = remainder % unitDivisor;
formattedStrings.push(unit + unitLabel);
}
}
return formattedStrings.join(" ");
}
};
SWFUpload.speed.formatBPS = function (baseNumber) {
var bpsUnits = [1073741824, 1048576, 1024, 1], bpsUnitLabels = ["Gbps", "Mbps", "Kbps", "bps"];
return SWFUpload.speed.formatUnits(baseNumber, bpsUnits, bpsUnitLabels, true);
};
SWFUpload.speed.formatTime = function (baseNumber) {
var timeUnits = [86400, 3600, 60, 1], timeUnitLabels = ["d", "h", "m", "s"];
return SWFUpload.speed.formatUnits(baseNumber, timeUnits, timeUnitLabels, false);
};
SWFUpload.speed.formatBytes = function (baseNumber) {
var sizeUnits = [1073741824, 1048576, 1024, 1], sizeUnitLabels = ["GB", "MB", "KB", "bytes"];
return SWFUpload.speed.formatUnits(baseNumber, sizeUnits, sizeUnitLabels, true);
};
SWFUpload.speed.formatPercent = function (baseNumber) {
return baseNumber.toFixed(2) + " %";
};
SWFUpload.speed.calculateMovingAverage = function (history) {
var vals = [], size, sum = 0.0, mean = 0.0, varianceTemp = 0.0, variance = 0.0, standardDev = 0.0;
var i;
var mSum = 0, mCount = 0;
size = history.length;
// Check for sufficient data
if (size >= 8) {
// Clone the array and Calculate sum of the values
for (i = 0; i < size; i++) {
vals[i] = history[i];
sum += vals[i];
}
mean = sum / size;
// Calculate variance for the set
for (i = 0; i < size; i++) {
varianceTemp += Math.pow((vals[i] - mean), 2);
}
variance = varianceTemp / size;
standardDev = Math.sqrt(variance);
//Standardize the Data
for (i = 0; i < size; i++) {
vals[i] = (vals[i] - mean) / standardDev;
}
// Calculate the average excluding outliers
var deviationRange = 2.0;
for (i = 0; i < size; i++) {
if (vals[i] <= deviationRange && vals[i] >= -deviationRange) {
mCount++;
mSum += history[i];
}
}
} else {
// Calculate the average (not enough data points to remove outliers)
mCount = size;
for (i = 0; i < size; i++) {
mSum += history[i];
}
}
return mSum / mCount;
};
}
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