usage-stats

A minimal, offline-friendly Google Analytics Measurement Protocol client for tracking usage statistics in shell and javascript applications.

This is a low-level API client, it doesn't hold any opinion of how usage tracking should be done. If you're looking for a convention which leverages the power and flexibility of Custom Metrics and Dimensions, take a look at app-usage-stats. For the command line client see usage-stats-cli.

Synopsis

The most trivial example.

const UsageStats = require('usage-stats')
const usageStats = new UsageStats('UA-98765432-1', { an: 'example' })

usageStats.screenView('screen name')
usageStats.event('category', 'action')
usageStats.send()

More realistic usage in a server application:

const UsageStats = require('usage-stats')
const usageStats = new UsageStats('UA-98765432-1', {
  an: 'encode-video',
  av: '1.0.0'
})

// start a new session
usageStats.start()

// user set two options..
usageStats.event('option', 'verbose-level', 'infinite')
usageStats.event('option', 'preset', 'iPod')

try {
  // Begin. Track as a screenView.
  usageStats.screenView('encoding')
  beginEncoding(options)
} catch (err) {
  // Exception tracking
  usageStats.exception(err.message, true)
}

// finished - mark the session as complete
// and send stats (or store if offline).
usageStats.end().send()

Protocol Parameters

See here for the full list of Google Analytics Measurement Protocol parameters.

Sent by default

All parameters are send on demand, beside this list.

• Operating System version (sent in the UserAgent)
• Client ID (a random UUID, generated once per OS user and stored)
• Language (process.env.LANG, if set)
• Screen resolution (terminal rows by columns, by default)

API Reference

Kind: Exported class

• UsageStats ⏏
  • new UsageStats(trackingId, [options])
  • .dir : string
  • .defaults : Map
  • .start([sessionParams]) ↩︎
  • .end([sessionParams]) ↩︎
  • .disable() ↩︎
  • .enable() ↩︎
  • .event(category, action, [options]) ⇒ Map
  • .screenView(name, [options]) ⇒ Map
  • .exception([options]) ⇒ Map
  • .send([options]) ⇒ Promise
  • .debug() ⇒ Promise
  • .abort() ↩︎

new UsageStats(trackingId, [options])

Param	Type	Description
trackingId	string	Google Analytics tracking ID (required).
[options]	object
[options.an]	string	App name
[options.av]	string	App version
[options.lang]	string	Language. Defaults to process.env.LANG.
[options.sr]	string	Screen resolution. Defaults to ${process.stdout.rows}x${process.stdout.columns}.
[options.ua]	string	User Agent string to use.
[options.dir]	string	Path of the directory used for persisting clientID and queue. Defaults to ~/.usage-stats.
[options.url]	string	Defaults to 'https://www.google-analytics.com/batch'.
[options.debugUrl]	string	Defaults to 'https://www.google-analytics.com/debug/collect'.

Example

const usageStats = new UsageStats('UA-98765432-1', {
  an: 'sick app',
  av: '1.0.0'
})

usageStats.dir : string

Cache directory. Defaults to ~/.usage-stats.

Kind: instance property of UsageStats

usageStats.defaults : Map

A list of parameters to be to sent with every hit.

Kind: instance property of UsageStats
Example

usageStats.defaults
  .set('cd1', process.version)
  .set('cd2', os.type())
  .set('cd3', os.release())
  .set('cd4', 'api')

usageStats.start([sessionParams]) ↩︎

Starts the session.

Kind: instance method of UsageStats
Chainable

Param	Type	Description
[sessionParams]	Array.<Map>	An optional map of paramaters to send with each hit in the sesison.

usageStats.end([sessionParams]) ↩︎

Ends the session.

Kind: instance method of UsageStats
Chainable

Param	Type	Description
[sessionParams]	Array.<Map>	An optional map of paramaters to send with the final hit of this sesison.

usageStats.disable() ↩︎

Disable the module. While disabled, all operations are no-ops.

Kind: instance method of UsageStats
Chainable

usageStats.enable() ↩︎

Re-enable the module.

Kind: instance method of UsageStats
Chainable

usageStats.event(category, action, [options]) ⇒ Map

Track an event. All event hits are queued until .send() is called.

Kind: instance method of UsageStats

Param	Type	Description
category	string	Event category (required).
action	string	Event action (required).
[options]	option
[options.el]	string	Event label
[options.ev]	string	Event value
[options.hitParams]	Array.<map>	One or more additional params to send with the hit.

usageStats.screenView(name, [options]) ⇒ Map

Track a screenview. All screenview hits are queued until .send() is called. Returns the hit instance.

Kind: instance method of UsageStats

Param	Type	Description
name	string	Screen name
[options]	object
[options.hitParams]	Array.<map>	One or more additional params to set on the hit.

usageStats.exception([options]) ⇒ Map

Track a exception. All exception hits are queued until .send() is called.

Kind: instance method of UsageStats

Param	Type	Description
[options]	object	optional params
[options.exd]	string	Error message
[options.exf]	boolean	Set true if the exception was fatal
[options.hitParams]	Array.<map>	One or more additional params to set on the hit.

usageStats.send([options]) ⇒ Promise

Send queued stats using as few requests as possible (typically a single request - a max of 20 events/screenviews may be sent per request). If offline, the stats will be stored and re-tried on next invocation.

Kind: instance method of UsageStats
Fulfil: response[] - array of responses. Each response has data and the original node res.
Reject: Error - Rejects with the first error encountered. The error is a standard node http error with a name of request-fail and a hits property showing what failed to send.

Param	Type
[options]	object
[options.timeout]	number

usageStats.debug() ⇒ Promise

Send any hits (including queued) to the GA validation server, fulfilling with the result.

Kind: instance method of UsageStats
Fulfil: Response[]
Reject: Error - Error instance includes hits.

usageStats.abort() ↩︎

Aborts the in-progress .send() operation, queuing any unsent hits.

Kind: instance method of UsageStats
Chainable

---

© 2016-23 Lloyd Brookes <[e-mail]>. Documented by jsdoc-to-markdown.