commit 54d021fbbda938eccc4716cf89ab08f2ae5065bc
Author: David Kebler <d@kebler.net>
Date:   Mon Jun 17 12:14:33 2019 -0700

    Initial commit of on/off gpio initially forked from uci-interrupt

diff --git a/.eslintrc.js b/.eslintrc.js
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index 0000000..2bed546
--- /dev/null
+++ b/.eslintrc.js
@@ -0,0 +1,33 @@
+module.exports = {
+  "ecmaFeatures": {
+    "modules": true,
+    "spread" : true,
+    "restParams" : true
+  },
+  "env": {
+    "es6": true,
+    "node": true,
+    "mocha": true
+  },
+  "parserOptions": {
+    "ecmaVersion": 2017,
+    "sourceType": "module"
+  },
+  "extends": "eslint:recommended",
+  "rules": {
+    "indent": [
+      "error",
+      2
+    ],
+    "no-console": 0,
+    "semi": ["error", "never"],
+    "linebreak-style": [
+      "error",
+      "unix"
+    ],
+    "quotes": [
+      "error",
+      "single"
+    ]
+  }
+}
diff --git a/.gitignore b/.gitignore
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--- /dev/null
+++ b/.gitignore
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+/node_modules/
+/coverage/
+*.lock
+archive/
diff --git a/.npmignore b/.npmignore
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--- /dev/null
+++ b/.npmignore
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+tests/
+test/
+*.test.js
+testing/
+examples/
+archive/
diff --git a/examples/client.js b/examples/client.js
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+++ b/examples/client.js
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+import Base from '@uci/base'
+
+// const HOST = 'localhost'
+const HOST = 'pine64.kebler.net'
+const PORT = 9075
+let client = new Base({sockets:'client#c>t', client:{host:HOST, port:PORT}, id:'gpios-client'})
+
+
+// client.c.reply = async function (packet) {
+//   return new Promise((resolve) => {
+//     console.log('reply from gpio with packet')
+//     console.dir(packet)
+//     resolve()
+//   })
+// }
+
+;
+(async () => {
+
+  await client.init()
+  console.log('RETURN', await client.send({cmd: 'on', pins:'all'}))
+  // console.log('RETURN', await client.send({cmd: 'off', pins:'all'}))
+  process.exit()
+
+})().catch(err => {
+  console.error('FATAL: UNABLE TO START SYSTEM!\n',err)
+})
diff --git a/examples/homeassistant.js b/examples/homeassistant.js
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+++ b/examples/homeassistant.js
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+
+// TODO make this an HA plugin to support HA convention ---
+
+///***************** HOME ASSISTANT ************************
+// uses main broker socket but formats incoming and outgoing packets for HA convention
+// TODO Make sure subscribed topics includes 'lighting/set/#'
+
+const TOPIC = 'relays'
+
+function register(name) {
+
+  this.beforeProcessHook(async (packet) => {
+    console.log('incoming mqtt packet to modify')
+    console.dir(packet)
+    let cmd = packet.cmd.split('/')
+    packet.cmd = `${packet.data.toLowerCase()}`
+    packet.pins = cmd[2]
+    delete packet.data
+    console.log('translated to uci packet')
+    console.dir(packet)
+    return packet
+  },
+  {name:name})
+
+  this.afterProcessHook(async (packet) => {
+    console.log('processed packet available to modify again', packet)
+    if (packet.error) {
+      let npacket = {}
+      npacket.cmd = 'error'
+      npacket.payload = JSON.stringify(packet)
+      // npacket.payload = packet.error
+      return npacket
+    }
+    return packet
+  },
+  {name:name})
+
+  this.beforeSendHook(async (packet) => {
+    console.log('beforeSendHook', packet)
+    if (packet.cmd === 'status') {
+      let num = Object.keys(packet.pins)[0]
+      packet.cmd = `${TOPIC}/status/${num}`
+      packet.payload = packet.pins[num] ? 'on' : 'off'
+      console.log('=============modified packet sent to broker================')
+      console.dir(packet)
+      console.log('================')
+    }
+    return packet
+  },
+  {name:name})
+
+}
+
+export default register
diff --git a/examples/multi.js b/examples/multi.js
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--- /dev/null
+++ b/examples/multi.js
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+import Gpios from '../src/gpios'
+import hahooks from './homeassistant.js'
+
+const PINS = [80,73,69,230,229,361,75,74,70]
+
+let relays  = new Gpios(PINS, {pinOpts:{activeLow:true}})
+
+const BROKER = 'nas.kebler.net'
+const TCP_PORT = 9075
+
+;
+(async () => {
+  await relays.addSocket('mqs','s','m', {host:BROKER, topics:['relays/set/+']})
+  hahooks.call(relays,'mqs')
+  await relays.addSocket('tcp','s','t', {port:TCP_PORT})
+  await relays.addSocket('web','s','w')
+  await relays.init()
+
+  // await relays.getSocket('mqs').subscribe(['relays/#'])
+
+})().catch(err => {
+  console.error('FATAL: UNABLE TO START SYSTEM!\n',err)
+  // process.kill(process.pid, 'SIGTERM')
+})
diff --git a/package.json b/package.json
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--- /dev/null
+++ b/package.json
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+{
+  "name": "@uci/gpio",
+  "main": "src",
+  "version": "0.1.10",
+  "description": "a class for adding simple on/off read of gpio pins on Raspberry Pi and Similar SBCs",
+  "scripts": {
+    "client": "node -r esm examples/client",
+    "multi": "node --require esm examples/multi",
+    "multilog": "UCI_ENV=dev node --require esm examples/multi"
+  },
+  "author": "David Kebler",
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/uCOMmandIt/uci-interrrupt.git"
+  },
+  "keywords": [
+    "node.js",
+    "communication",
+    "serial",
+    "utilities",
+    "helpers"
+  ],
+  "bugs": {
+    "url": "https://github.com/uCOMmandIt/uci-interrrupt/issues"
+  },
+  "homepage": "https://github.com/uCOMmandIt/uci-interrrupt#readme",
+  "dependencies": {
+    "@uci-utils/logger": "0.0.14",
+    "@uci/base": "^0.1.23",
+    "death": "^1.1.0",
+    "onoff": "^4.1.1",
+    "p-settle": "^3.1.0"
+  },
+  "devDependencies": {
+    "chai": "^4.1.2",
+    "esm": "^3.2.25",
+    "mocha": "^5.0.1",
+    "nodemon": "^1.14.3"
+  }
+}
diff --git a/readme.md b/readme.md
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+++ b/readme.md
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+# uCOMmandIt GPIO Package for SBC GPio Pins
+
+<!-- find and replace the package name to match -->
+[![Build Status](https://img.shields.io/travis/uCOMmandIt/uci-interrupt.svg?branch=master)](https://travis-ci.org/uCOMmandIt/uci-interrupt)
+[![Inline docs](http://inch-ci.org/github/uCOMmandIt/uci-interrupt.svg?branch=master)](http://inch-ci.org/github/uCOMmandIt/uci-interrupt)
+[![devDependencies](https://img.shields.io/david/dev/uCOMmandIt/uci-interrupt.svg)](https://david-dm.org/uCOMmandIt/uci-interrupt?type=dev)
+[![codecov](https://img.shields.io/codecov/c/github/uCOMmandIt/uci-interrupt/master.svg)](https://codecov.io/gh/uCOMmandIt/uci-interrupt)
+
+This module creates an instance of UCI Packet GPIO for a SBC gpio pin.  This class does NOT include support for interrupt based input.  See UCI-Interrupt package for that.
+
+## Set up hardware GPio bus pins as interrupts for use with UCI Interrupt
+
+### Enable access to GPios
+create (if need be) a gpio group and make sure your user is in the `gpio` group
+
+
+change group to gpio for  /sys/class/gpio/export and unexport and mode to 770.
+
+make a new udev rules file.
+
+```
+SUBSYSTEM=="gpio*", PROGRAM="/bin/sh -c 'find -L /sys/class/gpio/ -maxdepth 2 -exec chown root:gpio {} \; -exec chmod 770 {} \; || true'"
+```
+
+That should allow access via the on/off package which is a dependency.
diff --git a/src/commands.js b/src/commands.js
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--- /dev/null
+++ b/src/commands.js
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+const pSettle = require('p-settle')
+import logger from '@uci-utils/logger'
+let log = logger({package:'@uci/gpio', file:'/src/commands.js'})
+
+export default {
+  on: async function(packet) {
+    packet.pinCmd = 'on'
+    this.commands.set(packet)
+    return packet
+  },
+  off: async function(packet) {
+    packet.pinCmd = 'off'
+    await this.commands.set(packet)
+    return packet
+  },
+  toggle: async function(packet) {
+    packet.pinCmd = 'toggle'
+    await this.commands.set(packet)
+    return packet
+  },
+  set: async function(packet) {
+    packet.pinCmd = packet.pinCmd || 'set'
+    let pins = parsePins.call(this, packet.pins || packet.pin)
+    packet.res = await pSettle(
+      pins.map(pin => {
+        return this.pins[pin][packet.pinCmd](packet.value)
+      })
+    )
+    packet = await this.commands.get(packet)
+    this.emit('gpios',packet) // emit locally
+    this.push(packet) // will push on any socket
+    return packet
+  },
+
+  get: async function(packet) {
+    let pins = parsePins.call(this,packet.pins || packet.pin)
+    packet.pins = {}
+    pins.forEach(pin => packet.pins[pin] = this.pins[pin].value)
+    packet.cmd = 'status'
+    return packet
+  }
+}
+
+const parsePins = function(pins) {
+  if (typeof pins==='number') pins = [pins]
+  if (typeof pins==='string') {
+    if (pins==='all') pins = Object.keys(this.pins)
+    else {
+      pins = pins.split(/[,:\s]+/).map(Number).filter( (x) => !Number.isNaN(x))
+    }
+  }
+  // TODO plain object is pin and value pairs
+  return pins
+}
diff --git a/src/gpio.js b/src/gpio.js
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--- /dev/null
+++ b/src/gpio.js
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+import DeadJim from 'death'
+import { Gpio } from 'onoff'
+import to from 'await-to-js'
+
+
+import logger from '@uci-utils/logger'
+
+let log = logger({package:'@uci/gpio', file:'/src/gpio.js'})
+
+class Pin extends Gpio {
+  constructor(pin, opts = {}) {
+    if (typeof pin !=='number') pin = parseInt(pin)  // make sure pin is a number!
+    // TODO check against a set of known acceptable pin numbers based on SBC
+    log.debug({pin:pin, msg:'construtor - creating gpio pin'})
+    if (isNaN(pin)) throw new Error('not a valid gpio pin number')
+    super(pin,opts.direction || 'out',opts)
+    this.id = (opts.id || 'gpio') + ':' + pin
+    log.debug({ pin: pin, opts: opts, method:'constructor', line:15, msg:'created gpio with these opts'})
+    this.number = pin
+    this.direction = opts.direction || 'out'
+    this.value = opts.init || 0
+  } // end constructor
+
+  async init() {
+    this.set(this.value)
+    DeadJim((signal,err) => {
+      log.warn({signal:signal, method:'init', line:56, error:err, msg:'gpio process was killed, unexporting pin'})
+      this.unexport() // kill the kernel entry
+    })
+  }
+
+  async on() { return await this.set(1) }
+  async off() { return await this.set(0) }
+  async toggle() { return await this.set(!this.value) }
+
+  async set(value) {
+    let [err] = await to(this.write(parseInt(value) || 0))
+    if (err) {
+      log.warn({error:err, pin:this.number, msg:'error reading gpio pin'})
+      throw err
+    }
+    let curValue = await this.read()
+    if (value !== curValue) throw new Error(`pin ${this.number} was not set correctly: ${value}:${curValue}`)
+    return curValue
+  }
+
+  async read() {
+    let [err, res] = await to(super.read())
+    if (err) {
+      log.warn({error:err, pin:this.pin, msg:'error reading gpio pin'})
+      return err
+    }
+    this.value=res
+    this.state = res ? 'on' : 'off'
+    return res
+  }
+
+  async get() { return this.value }
+
+} // end Class
+
+export default Pin
+
+
+//example hook
+// async function defaultHook(packet) {
+// return a promise or use await if anything async happens in hook
+// new Promise((resolve) => {
+// console.log('==========default hook =============')
+// return packet
+// resolve(packet)
+// })
+// }
diff --git a/src/gpios.js b/src/gpios.js
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+++ b/src/gpios.js
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+
+import Base from '@uci/base'
+import logger from '@uci-utils/logger'
+
+import Gpio from './gpio'
+import commands from './commands'
+
+let log = {}
+
+// pins is array of gpio pin numbers, options is object where pin number is a key for that pin's options (if needed)
+// by default a pin is a simple output
+// for single pin just use the Gpio Class itself
+
+class Gpios extends Base {
+  constructor(pins, opts={}) {
+    super(opts)
+    this.id = this.id || 'gpios'
+    this.pins = {}
+    log = logger({ name: 'gpios', id: this.id, package:'@uci/gpios', file:'src/gpios.js'})
+    pins.forEach(pin => {
+      if (typeof pin !=='number') pin = parseInt(pin)
+      opts[pin] = opts[pin] ? opts[pin] : opts.pinOpts
+      log.debug({ opts: opts[pin], line:27, msg:`pin options for pin ${pin}`})
+      this.pins[pin] = new Gpio(pin, opts[pin])
+    })
+    this.commands = this.bindFuncs(commands)
+    this.addNamespace('commands', 's')  // give access to these commands above if a socket/server is created
+  }
+
+  async init() {
+    await super.init()
+    return Promise.all(
+      Object.keys(this.pins).map(pin => {
+        return this.pins[pin].init()
+      })
+    )
+  }
+
+
+  // register same hook to all pins
+  registerHook(func) {
+    this.pins.forEach(async pin => {
+      this.pins[pin].registerHook(func)
+    })
+  }
+
+} // end Class
+
+export default Gpios
diff --git a/src/index.js b/src/index.js
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+++ b/src/index.js
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+import Gpio from  './gpio'
+import Gpios from  './gpios'
+
+export { Gpio, Gpios }
+export default Gpio
diff --git a/test/gpio.test.js b/test/gpio.test.js
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--- /dev/null
+++ b/test/gpio.test.js
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+'use strict'
+
+const
+  Gpio = require('../src/interrupt'),
+  expect = require('chai').expect
+
+// TODO finish simple test of a pin as interrupt
+
+describe(
+  'Testing ',
+  function () {
+    hooks()
+    interrupt()
+    someothertests()
+  })
+
+//****************** TESTS **********************
+function interrupt() {
+  it('==> tests an interrupt', async function () {
+
+    expect(result, 'test failed').to.equal('expectedresult')
+
+  })
+}
+
+function someothertests() {
+  it('==> test something', async function () {
+
+    let result = await someasyncfunction()
+    expect(result, 'test failed').to.equal('expectedresult')
+    await pause(1000)
+
+  })
+}
+
+function hooks() {
+
+  before(async() => {
+
+  })
+
+  beforeEach(async() => {})
+
+  after(async() => {})
+
+}