glances-app v2.1.1

glances

A heads-up dashboard for displaying thing-statuses.

Demo

Example: https://github.com/nicinabox/glances-example

Demo: https://glances-example.herokuapp.com/

Overview

Glances is designed to be displayed on a monitor and works primarily over websockets. Built with React and Socket.io for lightning fast updates.

Features

• Responsive, flexbox-based grid
• Small, simple API
• Easy deployment
• Push data in with a request
• Pull data in on a schedule

Basic Usage

1. npm install -S glances-app
2. echo "require('glances-app')()" > server.js
3. Add tiles to tiles/
4. Start your server: npm start

Tile Anatomy

A tile is an object and structured like the following:

var state = {
  id: 'counter',
  title: 'Counter',
  color: 'teal',
  value: 0
}

module.exports = {
  state,

  onRequest($, body) {
    Object.assign(state, {
      value: +body.counter
    })

    return $.emitChange(state)
  },

  schedule($) {
    $.every('2 sec', 'update counter', () => {
      Object.assign(state, {
        value: state.value + 1
      })
      return $.emitChange(state)
    })
  }
}

Tile Layouts

Currently supported tile layouts:

• standard
• ticker
• list

For ticker and list types, pass a key/value object, a flat array, or an array of pairs as the value.

Tile API

id

An identifier for the tile. If not specified, the file name will be used.

state

The tile state object.

• title
• value
• moreInfo
• color
• position
• display (see Tile Layouts above)
• span (1-4)

onRequest

Called when tile receives a POST request. Make a request:

POST /tiles/:id

schedule

Define a schedule for the tile.

Accepts: utils

Utils

every

Schedule tile updates every so often. Must return a Promise or call next from callback

Accepts: interval, description (optional), callback

Callback proviles err, next

emitChange

Emit your new tile state

Accepts: object

TODO

• More robust value types based on data structures or setting
• Dynamic tile routes to POST data
• Pluggable, reusable tiles (should be possible currently, but need to investigate)
• Improve error handling
• Improve schedule api. Right now it's not obvious that id is required.
• More robust scheduler
• Management UI to search, install, and configure tiles
• Custom tiles

See NEXT.md for brainstorming on upcoming todos.

Prior Art

Glances was inspired by, and borrows heavily from Dashing by Shopify.