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'use strict';

// This program will connect to one or more SMA Sunny Webboxes

// to get the Solar Power Generated (current, today, total).

// example configuration in /etc/netdata/sma_webbox.conf

/*

{

"enable_autodetect": false,

"update_every": 5,

"servers": [

{

"name": "plant1",

"hostname": "10.0.1.1",

"update_every": 10

},

{

"name": "plant2",

"hostname": "10.0.2.1",

"update_every": 15

}

]

}

*/

var url = require('url');

var http = require('http');

var netdata = require('netdata');

if(netdata.options.DEBUG === true) netdata.debug('loaded ' + __filename + ' plugin');

var webbox = {

name: __filename,

enable_autodetect: true,

update_every: 1,

base_priority: 60000,

charts: {},

processResponse: function(service, data) {

if(data !== null) {

var r = JSON.parse(data);

var d = {

'GriPwr': {

unit: null,

value: null

},

'GriEgyTdy': {

unit: null,

value: null

},

'GriEgyTot': {

unit: null,

value: null

}

};

// parse the webbox response

// and put it in our d object

var found = 0;

var len = r.result.overview.length;

while(len--) {

var e = r.result.overview[len];

if(typeof(d[e.meta]) !== 'undefined') {

found++;

d[e.meta].value = e.value;

d[e.meta].unit = e.unit;

}

}

// add the service

if(found > 0 && service.added !== true)

service.commit();

// Grid Current Power Chart

if(d['GriPwr'].value !== null) {

var id = 'sma_webbox_' + service.name + '.current';

var chart = webbox.charts[id];

if(typeof chart === 'undefined') {

chart = {

id: id, // the unique id of the chart

name: '', // the unique name of the chart

title: service.name + ' Current Grid Power', // the title of the chart

units: d['GriPwr'].unit, // the units of the chart dimensions

family: 'now', // the family of the chart

context: 'sma_webbox.grid.power', // the context of the chart

type: netdata.chartTypes.area, // the type of the chart

priority: webbox.base_priority + 1, // the priority relative to others in the same family

update_every: service.update_every, // the expected update frequency of the chart

dimensions: {

'GriPwr': {

id: 'GriPwr', // the unique id of the dimension

name: 'power', // the name of the dimension

algorithm: netdata.chartAlgorithms.absolute,// the id of the netdata algorithm

multiplier: 1, // the multiplier

divisor: 1, // the divisor

hidden: false // is hidden (boolean)

}

}

};

chart = service.chart(id, chart);

webbox.charts[id] = chart;

}

service.begin(chart);

service.set('GriPwr', Math.round(d['GriPwr'].value));

service.end();

}

if(d['GriEgyTdy'].value !== null) {

var id = 'sma_webbox_' + service.name + '.today';

var chart = webbox.charts[id];

if(typeof chart === 'undefined') {

chart = {

id: id, // the unique id of the chart

name: '', // the unique name of the chart

title: service.name + ' Today Grid Power', // the title of the chart

units: d['GriEgyTdy'].unit, // the units of the chart dimensions

family: 'today', // the family of the chart

context: 'sma_webbox.grid.power.today', // the context of the chart

type: netdata.chartTypes.area, // the type of the chart

priority: webbox.base_priority + 2, // the priority relative to others in the same family

update_every: service.update_every, // the expected update frequency of the chart

dimensions: {

'GriEgyTdy': {

id: 'GriEgyTdy', // the unique id of the dimension

name: 'power', // the name of the dimension

algorithm: netdata.chartAlgorithms.absolute,// the id of the netdata algorithm

multiplier: 1, // the multiplier

divisor: 1000, // the divisor

hidden: false // is hidden (boolean)

}

}

};

chart = service.chart(id, chart);

webbox.charts[id] = chart;

}

service.begin(chart);

service.set('GriEgyTdy', Math.round(d['GriEgyTdy'].value * 1000));

service.end();

}

if(d['GriEgyTot'].value !== null) {

var id = 'sma_webbox_' + service.name + '.total';

var chart = webbox.charts[id];

if(typeof chart === 'undefined') {

chart = {

id: id, // the unique id of the chart

name: '', // the unique name of the chart

title: service.name + ' Total Grid Power', // the title of the chart

units: d['GriEgyTot'].unit, // the units of the chart dimensions

family: 'total', // the family of the chart

context: 'sma_webbox.grid.power.total', // the context of the chart

type: netdata.chartTypes.area, // the type of the chart

priority: webbox.base_priority + 3, // the priority relative to others in the same family

update_every: service.update_every, // the expected update frequency of the chart

dimensions: {

'GriEgyTot': {

id: 'GriEgyTot', // the unique id of the dimension

name: 'power', // the name of the dimension

algorithm: netdata.chartAlgorithms.absolute,// the id of the netdata algorithm

multiplier: 1, // the multiplier

divisor: 1000, // the divisor

hidden: false // is hidden (boolean)

}

}

};

chart = service.chart(id, chart);

webbox.charts[id] = chart;

}

service.begin(chart);

service.set('GriEgyTot', Math.round(d['GriEgyTot'].value * 1000));

service.end();

}

}

},

// module.serviceExecute()

// this function is called only from this module

// its purpose is to prepare the request and call

// netdata.serviceExecute()

serviceExecute: function(name, hostname, update_every) {

if(netdata.options.DEBUG === true) netdata.debug(this.name + ': ' + name + ': hostname: ' + hostname + ', update_every: ' + update_every);

var service = netdata.service({

name: name,

request: netdata.requestFromURL('http://' + hostname + '/rpc'),

update_every: update_every,

module: this

});

service.postData = 'RPC={"proc":"GetPlantOverview","format":"JSON","version":"1.0","id":"1"}';

service.request.method = 'POST';

service.request.headers['Content-Length'] = service.postData.length;

service.execute(this.processResponse);

},

configure: function(config) {

var added = 0;

if(typeof(config.servers) !== 'undefined') {

var len = config.servers.length;

while(len--) {

if(typeof config.servers[len].update_every === 'undefined')

config.servers[len].update_every = this.update_every;

if(config.servers[len].update_every < 5)

config.servers[len].update_every = 5;

this.serviceExecute(config.servers[len].name, config.servers[len].hostname, config.servers[len].update_every);

added++;

}

}

return added;

},

// module.update()

// this is called repeatidly to collect data, by calling

// netdata.serviceExecute()

update: function(service, callback) {

service.execute(function(serv, data) {

service.module.processResponse(serv, data);

callback();

});

},

};

module.exports = webbox;